feat: daylight tz, camera engine, value stream + modal/UI polish

- daylight: new daylight_settings module + daylight-tz frontend helper; expanded daylight_stream behavior
- camera engine: capture path additions plus new test_camera_engine suite
- value stream: schema + processing updates (~178 lines)
- color strip: drop cycle effect (cycle.py / color-cycle.ts removed), tighten static path
- modal CSS: large refactor (+883), components.css polish (+110)
- templates: settings, css-editor, value-source-editor, test-template, display-picker, image-lightbox
- frontend core: state, modal, icons, graph-nodes, app
- frontend features: displays, streams, streams-capture-templates, value-sources, settings, color-strips/cards
- locales: en/ru/zh
- storage: color_strip, picture_source, value_source loaders touched
- preferences/sync_clocks/picture_sources routes; home_assistant + templates schemas

server/src/ledgrab/api/routes/color_strip_sources/_helpers.py

@@ -4,7 +4,6 @@ from ledgrab.api.schemas.color_strip_sources import (
     ApiInputCSSResponse,
     AudioCSSResponse,
     CandlelightCSSResponse,
-    ColorCycleCSSResponse,
     ColorStop as ColorStopSchema,
     ColorStripSourceResponse,
     CompositeCSSResponse,
@@ -31,7 +30,6 @@ from ledgrab.storage.color_strip_source import (
     ApiInputColorStripSource,
     AudioColorStripSource,
     CandlelightColorStripSource,
-    ColorCycleColorStripSource,
     CompositeColorStripSource,
     DaylightColorStripSource,
     EffectColorStripSource,
@@ -121,10 +119,6 @@ _RESPONSE_MAP: dict = {
         easing=s.easing,
         gradient_id=s.gradient_id,
     ),
-    ColorCycleColorStripSource: lambda s, kw: ColorCycleCSSResponse(
-        **kw,
-        colors=[list(c) for c in s.colors],
-    ),
     EffectColorStripSource: lambda s, kw: EffectCSSResponse(
         **kw,
         effect_type=s.effect_type,

server/src/ledgrab/api/routes/color_strip_sources/ws_stream.py

@@ -31,7 +31,6 @@ router = APIRouter()
 _PREVIEW_ALLOWED_TYPES = {
     "static",
     "gradient",
-    "color_cycle",
     "effect",
     "daylight",
     "candlelight",

server/src/ledgrab/api/routes/home_assistant.py

@@ -316,6 +316,7 @@ async def get_ha_status(
                 name=source.name,
                 connected=connected,
                 entity_count=status["entity_count"] if status else 0,
+                host=source.host or "",
             )
         )
 

server/src/ledgrab/api/routes/picture_sources.py

@@ -12,6 +12,7 @@ from fastapi.responses import Response
 from ledgrab.api.auth import AuthRequired
 from ledgrab.api.dependencies import (
     fire_entity_event,
+    get_color_strip_store,
     get_picture_source_store,
     get_output_target_store,
     get_pp_template_store,
@@ -37,6 +38,7 @@ from ledgrab.api.schemas.picture_sources import (
 )
 from ledgrab.core.capture_engines import EngineRegistry
 from ledgrab.core.filters import FilterRegistry, ImagePool
+from ledgrab.storage.color_strip_store import ColorStripStore
 from ledgrab.storage.output_target_store import OutputTargetStore
 from ledgrab.storage.template_store import TemplateStore
 from ledgrab.storage.postprocessing_template_store import PostprocessingTemplateStore
@@ -361,11 +363,12 @@ async def delete_picture_source(
     _auth: AuthRequired,
     store: PictureSourceStore = Depends(get_picture_source_store),
     target_store: OutputTargetStore = Depends(get_output_target_store),
+    css_store: ColorStripStore = Depends(get_color_strip_store),
 ):
     """Delete a picture source."""
     try:
-        # Check if any target references this stream
-        target_names = store.get_targets_referencing(stream_id, target_store)
+        # Check if any target transitively references this stream via a CSS
+        target_names = store.get_targets_referencing(stream_id, target_store, css_store)
         if target_names:
             names = ", ".join(target_names)
             raise HTTPException(
@@ -373,6 +376,16 @@ async def delete_picture_source(
                 detail=f"Cannot delete picture source: it is assigned to target(s): {names}. "
                 "Please reassign those targets before deleting.",
             )
+        # Block when any CSS still references this picture source, even if no
+        # target depends on it — deletion would leave the CSS broken.
+        css_refs = css_store.get_referencing_picture_source(stream_id)
+        if css_refs:
+            css_names = ", ".join(css.name for css in css_refs)
+            raise HTTPException(
+                status_code=409,
+                detail=f"Cannot delete picture source: it is used by color strip source(s): "
+                f"{css_names}. Please reassign or delete those first.",
+            )
         store.delete_stream(stream_id)
         fire_entity_event("picture_source", "deleted", stream_id)
     except HTTPException:

server/src/ledgrab/api/routes/preferences.py

@@ -1,4 +1,4 @@
-"""User preferences routes — dashboard layout + notification settings.
+"""User preferences routes — dashboard layout + notification settings + daylight tz.
 
 The dashboard layout schema is owned by the frontend (open registry of
 section/cell keys); the backend treats the value as an opaque JSON blob,
@@ -8,15 +8,26 @@ validates it's a dict with a `version` field, and persists it under the
 Notification preferences are validated server-side via Pydantic so the
 backend can read them when deciding whether to start the background
 discovery watcher.
+
+Daylight timezone is a single global IANA tz name shared by every
+daylight value-source / color-strip-source. Stored as
+``{"value": "Europe/Berlin"}`` under the ``daylight_timezone`` key, with
+empty/missing meaning "use system local time".
 """
 
 from typing import Any
 
 from fastapi import APIRouter, Body, Depends, HTTPException
+from pydantic import BaseModel, Field
 
 from ledgrab.api.auth import AuthRequired
 from ledgrab.api.dependencies import get_database
 from ledgrab.api.schemas.preferences import NotificationPreferences
+from ledgrab.core.processing.daylight_settings import (
+    DAYLIGHT_TIMEZONE_KEY,
+    get_daylight_timezone,
+    set_daylight_timezone,
+)
 from ledgrab.storage.database import Database
 from ledgrab.utils import get_logger
 
@@ -28,6 +39,12 @@ _DASHBOARD_LAYOUT_KEY = "dashboard_layout"
 _NOTIFICATION_PREFS_KEY = "notification_preferences"
 
 
+class DaylightTimezonePreference(BaseModel):
+    """Global IANA timezone applied to every daylight cycle source."""
+
+    timezone: str = Field("", description="IANA timezone name; empty = system local")
+
+
 def load_notification_preferences(db: Database | None = None) -> NotificationPreferences:
     """Read notification prefs, returning defaults when unset or corrupt.
 
@@ -144,3 +161,43 @@ async def put_notification_preferences(
         body.channels.model_dump(),
     )
     return body
+
+
+# ---------------------------------------------------------------------------
+# Daylight timezone (global)
+# ---------------------------------------------------------------------------
+
+
+@router.get(
+    "/api/v1/preferences/daylight-timezone",
+    response_model=DaylightTimezonePreference,
+    tags=["Preferences"],
+)
+async def get_daylight_timezone_preference(
+    _: AuthRequired,
+) -> DaylightTimezonePreference:
+    """Return the global daylight cycle timezone (empty = system local)."""
+    return DaylightTimezonePreference(timezone=get_daylight_timezone())
+
+
+@router.put(
+    "/api/v1/preferences/daylight-timezone",
+    response_model=DaylightTimezonePreference,
+    tags=["Preferences"],
+)
+async def put_daylight_timezone_preference(
+    _: AuthRequired,
+    body: DaylightTimezonePreference,
+) -> DaylightTimezonePreference:
+    """Persist the global daylight cycle timezone.
+
+    The string is stored verbatim — clients should send a valid IANA name
+    (e.g. ``Europe/Berlin``) or an empty string for "use server local".
+    Daylight streams pick up the new value within ~1 second.
+    """
+    saved = set_daylight_timezone(body.timezone)
+    logger.info("Daylight timezone updated: %r", saved or "<system local>")
+    return DaylightTimezonePreference(timezone=saved)
+
+
+__all__ = ["router", "DAYLIGHT_TIMEZONE_KEY"]

server/src/ledgrab/api/routes/sync_clocks.py

@@ -8,6 +8,7 @@ from ledgrab.api.dependencies import (
     get_color_strip_store,
     get_sync_clock_manager,
     get_sync_clock_store,
+    get_value_source_store,
 )
 from ledgrab.api.schemas.sync_clocks import (
     SyncClockCreate,
@@ -18,6 +19,7 @@ from ledgrab.api.schemas.sync_clocks import (
 from ledgrab.storage.sync_clock import SyncClock
 from ledgrab.storage.sync_clock_store import SyncClockStore
 from ledgrab.storage.color_strip_store import ColorStripStore
+from ledgrab.storage.value_source_store import ValueSourceStore
 from ledgrab.core.processing.sync_clock_manager import SyncClockManager
 from ledgrab.utils import get_logger
 from ledgrab.storage.base_store import EntityNotFoundError
@@ -137,14 +139,18 @@ async def delete_sync_clock(
     _auth: AuthRequired,
     store: SyncClockStore = Depends(get_sync_clock_store),
     css_store: ColorStripStore = Depends(get_color_strip_store),
+    vs_store: ValueSourceStore = Depends(get_value_source_store),
     manager: SyncClockManager = Depends(get_sync_clock_manager),
 ):
-    """Delete a synchronization clock (fails if referenced by CSS sources)."""
+    """Delete a synchronization clock (fails if referenced by CSS or value sources)."""
     try:
         # Check references
         for source in css_store.get_all_sources():
             if getattr(source, "clock_id", None) == clock_id:
                 raise ValueError(f"Cannot delete: referenced by color strip source '{source.name}'")
+        for vs in vs_store.get_all_sources():
+            if getattr(vs, "clock_id", None) == clock_id:
+                raise ValueError(f"Cannot delete: referenced by value source '{vs.name}'")
         manager.release_all_for(clock_id)
         store.delete_clock(clock_id)
         fire_entity_event("sync_clock", "deleted", clock_id)

server/src/ledgrab/api/routes/templates.py

@@ -255,6 +255,7 @@ async def list_engines(_auth: AuthRequired):
                     type=engine_type,
                     name=engine_type.upper(),
                     default_config=engine_class.get_default_config(),
+                    config_choices=engine_class.get_config_choices(),
                     available=(engine_type in available_set),
                     has_own_displays=getattr(engine_class, "HAS_OWN_DISPLAYS", False),
                 )

server/src/ledgrab/api/routes/value_sources.py

@@ -105,6 +105,7 @@ _RESPONSE_MAP = {
         speed=s.speed,
         use_real_time=s.use_real_time,
         latitude=s.latitude,
+        longitude=s.longitude,
         min_value=s.min_value,
         max_value=s.max_value,
     ),
@@ -127,6 +128,7 @@ _RESPONSE_MAP = {
         colors=[list(c) for c in s.colors],
         speed=s.speed,
         easing=s.easing,
+        clock_id=s.clock_id,
     ),
     AdaptiveTimeColorValueSource: lambda s: AdaptiveTimeColorValueSourceResponse(
         id=s.id,

server/src/ledgrab/api/schemas/color_strip_sources.py

@@ -28,7 +28,7 @@ class AnimationConfig(BaseModel):
     """Procedural animation configuration for static/gradient color strip sources."""
 
     enabled: bool = True
-    type: str = "breathing"  # breathing | color_cycle | gradient_shift | wave
+    type: str = "breathing"  # breathing | gradient_shift | wave
     speed: float = Field(1.0, ge=0.1, le=10.0, description="Speed multiplier (0.1-10.0)")
 
 
@@ -126,11 +126,6 @@ class GradientCSSResponse(_CSSResponseBase):
     gradient_id: Optional[str] = Field(None, description="Gradient entity ID")
 
 
-class ColorCycleCSSResponse(_CSSResponseBase):
-    source_type: Literal["color_cycle"] = "color_cycle"
-    colors: List[List[int]] = Field(description="List of [R,G,B] colors to cycle")
-
-
 class EffectCSSResponse(_CSSResponseBase):
     source_type: Literal["effect"] = "effect"
     effect_type: str = Field(description="Effect algorithm")
@@ -241,7 +236,6 @@ ColorStripSourceResponse = Annotated[
         Annotated[PictureAdvancedCSSResponse, Tag("picture_advanced")],
         Annotated[StaticCSSResponse, Tag("static")],
         Annotated[GradientCSSResponse, Tag("gradient")],
-        Annotated[ColorCycleCSSResponse, Tag("color_cycle")],
         Annotated[EffectCSSResponse, Tag("effect")],
         Annotated[CompositeCSSResponse, Tag("composite")],
         Annotated[MappedCSSResponse, Tag("mapped")],
@@ -303,11 +297,6 @@ class GradientCSSCreate(_CSSCreateBase):
     gradient_id: Optional[str] = Field(None, description="Gradient entity ID")
 
 
-class ColorCycleCSSCreate(_CSSCreateBase):
-    source_type: Literal["color_cycle"] = "color_cycle"
-    colors: Optional[List[List[int]]] = Field(None, description="List of [R,G,B] colors to cycle")
-
-
 class EffectCSSCreate(_CSSCreateBase):
     source_type: Literal["effect"] = "effect"
     effect_type: Optional[str] = Field(None, description="Effect algorithm")
@@ -431,7 +420,6 @@ ColorStripSourceCreate = Annotated[
         Annotated[PictureAdvancedCSSCreate, Tag("picture_advanced")],
         Annotated[StaticCSSCreate, Tag("static")],
         Annotated[GradientCSSCreate, Tag("gradient")],
-        Annotated[ColorCycleCSSCreate, Tag("color_cycle")],
         Annotated[EffectCSSCreate, Tag("effect")],
         Annotated[CompositeCSSCreate, Tag("composite")],
         Annotated[MappedCSSCreate, Tag("mapped")],
@@ -493,11 +481,6 @@ class GradientCSSUpdate(_CSSUpdateBase):
     gradient_id: Optional[str] = Field(None, description="Gradient entity ID")
 
 
-class ColorCycleCSSUpdate(_CSSUpdateBase):
-    source_type: Literal["color_cycle"] = "color_cycle"
-    colors: Optional[List[List[int]]] = Field(None, description="List of [R,G,B] colors to cycle")
-
-
 class EffectCSSUpdate(_CSSUpdateBase):
     source_type: Literal["effect"] = "effect"
     effect_type: Optional[str] = Field(None, description="Effect algorithm")
@@ -619,7 +602,6 @@ ColorStripSourceUpdate = Annotated[
         Annotated[PictureAdvancedCSSUpdate, Tag("picture_advanced")],
         Annotated[StaticCSSUpdate, Tag("static")],
         Annotated[GradientCSSUpdate, Tag("gradient")],
-        Annotated[ColorCycleCSSUpdate, Tag("color_cycle")],
         Annotated[EffectCSSUpdate, Tag("effect")],
         Annotated[CompositeCSSUpdate, Tag("composite")],
         Annotated[MappedCSSUpdate, Tag("mapped")],

server/src/ledgrab/api/schemas/home_assistant.py

@@ -94,6 +94,7 @@ class HomeAssistantConnectionStatus(BaseModel):
     name: str
     connected: bool
     entity_count: int
+    host: str = ""
 
 
 class HomeAssistantStatusResponse(BaseModel):

server/src/ledgrab/api/schemas/templates.py

@@ -52,6 +52,10 @@ class EngineInfo(BaseModel):
     type: str = Field(description="Engine type identifier (e.g., 'mss', 'dxcam')")
     name: str = Field(description="Human-readable engine name")
     default_config: Dict = Field(description="Default configuration for this engine")
+    config_choices: Dict[str, List[str]] = Field(
+        default_factory=dict,
+        description="Allowed values for enum-like config keys on this platform",
+    )
     available: bool = Field(description="Whether engine is available on this system")
     has_own_displays: bool = Field(
         default=False, description="Engine has its own device list (not desktop monitors)"

server/src/ledgrab/api/schemas/value_sources.py

@@ -73,6 +73,7 @@ class DaylightValueSourceResponse(_ValueSourceResponseBase):
     speed: float = Field(description="Simulation speed multiplier")
     use_real_time: bool = Field(description="Use wall-clock time")
     latitude: float = Field(description="Geographic latitude")
+    longitude: float = Field(description="Geographic longitude")
     min_value: float = Field(description="Minimum output")
     max_value: float = Field(description="Maximum output")
 
@@ -87,8 +88,11 @@ class AnimatedColorValueSourceResponse(_ValueSourceResponseBase):
     source_type: Literal["animated_color"] = "animated_color"
     return_type: Literal["color"] = "color"
     colors: List[List[int]] = Field(description="Color list [[R,G,B], ...]")
-    speed: float = Field(description="Cycles per minute")
-    easing: str = Field(description="Color easing: linear|step")
+    speed: float = Field(description="Cycles per minute (ignored when clock_id is set)")
+    easing: str = Field(description="Color easing: linear|step|ease_in|ease_out|ease_in_out|sine")
+    clock_id: Optional[str] = Field(
+        None, description="Optional sync clock ID for shared timing (overrides speed)"
+    )
 
 
 class AdaptiveTimeColorValueSourceResponse(_ValueSourceResponseBase):
@@ -215,6 +219,9 @@ class DaylightValueSourceCreate(_ValueSourceCreateBase):
     speed: float = Field(1.0, description="Simulation speed multiplier", ge=0.1, le=120.0)
     use_real_time: bool = Field(False, description="Use wall-clock time instead of simulation")
     latitude: float = Field(50.0, description="Geographic latitude (-90 to 90)", ge=-90.0, le=90.0)
+    longitude: float = Field(
+        0.0, description="Geographic longitude (-180 to 180)", ge=-180.0, le=180.0
+    )
     min_value: float = Field(0.0, description="Minimum output (0.0-1.0)", ge=0.0, le=1.0)
     max_value: float = Field(1.0, description="Maximum output (0.0-1.0)", ge=0.0, le=1.0)
 
@@ -234,7 +241,12 @@ class AnimatedColorValueSourceCreate(_ValueSourceCreateBase):
         description="Color list [[R,G,B], ...]",
     )
     speed: float = Field(10.0, description="Cycles per minute", ge=0.1, le=120.0)
-    easing: str = Field("linear", description="Color easing: linear|step")
+    easing: str = Field(
+        "linear", description="Color easing: linear|step|ease_in|ease_out|ease_in_out|sine"
+    )
+    clock_id: Optional[str] = Field(
+        None, description="Optional sync clock ID (overrides speed when set)"
+    )
 
 
 class AdaptiveTimeColorValueSourceCreate(_ValueSourceCreateBase):
@@ -356,6 +368,9 @@ class DaylightValueSourceUpdate(_ValueSourceUpdateBase):
     speed: Optional[float] = Field(None, description="Simulation speed", ge=0.1, le=120.0)
     use_real_time: Optional[bool] = Field(None, description="Use wall-clock time")
     latitude: Optional[float] = Field(None, description="Geographic latitude", ge=-90.0, le=90.0)
+    longitude: Optional[float] = Field(
+        None, description="Geographic longitude", ge=-180.0, le=180.0
+    )
     min_value: Optional[float] = Field(None, description="Minimum output", ge=0.0, le=1.0)
     max_value: Optional[float] = Field(None, description="Maximum output", ge=0.0, le=1.0)
 
@@ -369,7 +384,12 @@ class AnimatedColorValueSourceUpdate(_ValueSourceUpdateBase):
     source_type: Literal["animated_color"] = "animated_color"
     colors: Optional[List[List[int]]] = Field(None, description="Color list [[R,G,B], ...]")
     speed: Optional[float] = Field(None, description="Cycles per minute", ge=0.1, le=120.0)
-    easing: Optional[str] = Field(None, description="Color easing: linear|step")
+    easing: Optional[str] = Field(
+        None, description="Color easing: linear|step|ease_in|ease_out|ease_in_out|sine"
+    )
+    clock_id: Optional[str] = Field(
+        None, description="Optional sync clock ID (empty string clears, null leaves unchanged)"
+    )
 
 
 class AdaptiveTimeColorValueSourceUpdate(_ValueSourceUpdateBase):

server/src/ledgrab/core/capture_engines/base.py

@@ -117,6 +117,16 @@ class CaptureEngine(ABC):
         """Get default configuration for this engine."""
         pass
 
+    @classmethod
+    def get_config_choices(cls) -> Dict[str, List[str]]:
+        """Return allowed values for enum-like config keys on this platform.
+
+        Keys returned here narrow the values the UI offers for the
+        corresponding config field. Engines that have no platform-specific
+        constraints can leave this empty (default).
+        """
+        return {}
+
     @classmethod
     @abstractmethod
     def get_available_displays(cls) -> List[DisplayInfo]:

server/src/ledgrab/core/capture_engines/camera_engine.py

@@ -8,12 +8,19 @@ Prerequisites (optional dependency):
     pip install opencv-python-headless>=4.8.0
 """
 
+import os
 import platform
 import sys
 import threading
 import time
 from typing import Any, Dict, List, Optional, Set
 
+# OpenCV's MSMF backend on Windows often fails to open the device
+# ("cap.isOpened() == False" right after VideoCapture returns) when
+# hardware MFTs are enabled. Disabling them is the documented mitigation.
+# Set before any cv2 import so the MSMF backend picks it up on first use.
+os.environ.setdefault("OPENCV_VIDEOIO_MSMF_ENABLE_HW_TRANSFORMS", "0")
+
 
 from ledgrab.core.capture_engines.base import (
     CaptureEngine,
@@ -27,6 +34,41 @@ logger = get_logger(__name__)
 
 _MAX_CAMERA_INDEX = 10  # probe indices 0..9
 
+# Sentinel used to ask DShow/MSMF/V4L2 for the highest mode the device supports.
+# OpenCV will clamp the requested width/height down to the nearest supported mode.
+_PROBE_MAX_DIM = 9999
+
+# Resolution presets shown in the UI. "auto" means: open at the camera's max
+# (probed via _PROBE_MAX_DIM); the other entries are explicit overrides.
+_RESOLUTION_CHOICES: List[str] = [
+    "auto",
+    "640x480",
+    "1280x720",
+    "1920x1080",
+    "2560x1440",
+    "3840x2160",
+]
+
+
+def _parse_resolution(value: Any) -> Optional[tuple[int, int]]:
+    """Parse a 'WxH' string into (width, height). Returns None for 'auto' or invalid."""
+    if not isinstance(value, str):
+        return None
+    s = value.strip().lower()
+    if s in ("", "auto"):
+        return None
+    parts = s.replace("×", "x").split("x")
+    if len(parts) != 2:
+        return None
+    try:
+        w, h = int(parts[0]), int(parts[1])
+    except ValueError:
+        return None
+    if w <= 0 or h <= 0:
+        return None
+    return w, h
+
+
 # Process-wide registry of cv2 camera indices currently held open.
 # Prevents _enumerate_cameras from probing an in-use camera (which can
 # crash the DSHOW backend on Windows) and prevents two CameraCaptureStreams
@@ -48,6 +90,85 @@ def _get_default_backend():
     return "auto"
 
 
+# Maps our backend ids to the label cv2.getBuildInformation() prints in the
+# Video I/O section. Entries missing or marked "NO" mean the installed
+# opencv wheel was compiled without that backend — even if cv2's registry
+# still lists it, attempts to open will fail with isOpened()==False.
+_BUILDINFO_LABELS: Dict[str, str] = {
+    "dshow": "DirectShow",
+    "msmf": "Media Foundation",
+    "v4l2": "v4l/v4l2",
+    "avfoundation": "AVFoundation",
+}
+
+_compiled_backends_cache: Optional[Set[str]] = None
+
+
+def _get_compiled_backends() -> Set[str]:
+    """Return the set of backend ids the installed cv2 was compiled with.
+
+    Parses ``cv2.getBuildInformation()`` because cv2's videoio registry can
+    advertise backends that aren't actually functional (e.g. wheels that
+    omit Media Foundation still list MSMF in the registry).
+    """
+    global _compiled_backends_cache
+    if _compiled_backends_cache is not None:
+        return _compiled_backends_cache
+
+    try:
+        import cv2
+    except ImportError:
+        _compiled_backends_cache = set()
+        return _compiled_backends_cache
+
+    info = cv2.getBuildInformation()
+    # Restrict the search to the "Video I/O" section so labels like
+    # "Media Foundation" don't pick up unrelated mentions elsewhere.
+    start = info.find("Video I/O:")
+    section = info[start:] if start != -1 else info
+    end_markers = ("Parallel framework", "Trace:", "Other third-party libraries")
+    for marker in end_markers:
+        idx = section.find(marker)
+        if idx != -1:
+            section = section[:idx]
+            break
+
+    found: Set[str] = set()
+    for backend, label in _BUILDINFO_LABELS.items():
+        # Match "<label>: <whitespace>YES" anywhere in the section.
+        needle = label + ":"
+        pos = section.find(needle)
+        if pos == -1:
+            continue
+        line_end = section.find("\n", pos)
+        line = section[pos : line_end if line_end != -1 else len(section)]
+        if "YES" in line.upper():
+            found.add(backend)
+
+    _compiled_backends_cache = found
+    return found
+
+
+def _get_supported_backends() -> List[str]:
+    """Return the list of cv2 backends that make sense on this platform.
+
+    Only advertises backends that are both (a) appropriate for the host OS
+    and (b) actually compiled into the installed opencv wheel. ``auto`` is
+    always offered as a safe default.
+    """
+    if sys.platform == "win32":
+        candidates = ["dshow", "msmf"]
+    elif sys.platform.startswith("linux"):
+        candidates = ["v4l2"]
+    elif sys.platform == "darwin":
+        candidates = ["avfoundation"]
+    else:
+        candidates = []
+
+    compiled = _get_compiled_backends()
+    return ["auto", *(b for b in candidates if b in compiled)]
+
+
 def _cv2_backend_id(backend_name: str) -> Optional[int]:
     """Convert a backend name string to cv2 API preference constant."""
     return _CV2_BACKENDS.get(backend_name)
@@ -256,8 +377,20 @@ def _enumerate_cameras(backend_name: str = "auto") -> List[Dict[str, Any]]:
             cap.release()
             continue
 
-        width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
-        height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
+        # Probe the camera's max supported mode by asking for an absurdly large
+        # frame size — DShow/MSMF/V4L2 clamp down to the highest available mode.
+        # If the probe is rejected (rare driver issue), fall back to the default
+        # mode that the camera reports immediately after open.
+        default_width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
+        default_height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
+        try:
+            cap.set(cv2.CAP_PROP_FRAME_WIDTH, _PROBE_MAX_DIM)
+            cap.set(cv2.CAP_PROP_FRAME_HEIGHT, _PROBE_MAX_DIM)
+            width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)) or default_width
+            height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT)) or default_height
+        except Exception as e:
+            logger.debug(f"Camera {i} max-resolution probe failed: {e}")
+            width, height = default_width, default_height
         fps = cap.get(cv2.CAP_PROP_FPS) or 30.0
 
         name = friendly_names.get(sequential_idx, f"Camera {sequential_idx}")
@@ -328,16 +461,28 @@ class CameraCaptureStream(CaptureStream):
             _active_cv2_indices.add(cv2_index)
 
         try:
-            # Open the camera
+            # Open the camera. MSMF's first open after a DShow session (or its
+            # very first cold open in the process) is timing-sensitive on
+            # Windows, so retry briefly before giving up.
             backend_id = _cv2_backend_id(backend_name)
+            attempts = 3 if backend_name == "msmf" else 1
+            self._cap = None
+            for attempt in range(attempts):
                 if backend_id is not None:
-                self._cap = cv2.VideoCapture(cv2_index, backend_id)
+                    cap = cv2.VideoCapture(cv2_index, backend_id)
                 else:
-                self._cap = cv2.VideoCapture(cv2_index)
+                    cap = cv2.VideoCapture(cv2_index)
+                if cap.isOpened():
+                    self._cap = cap
+                    break
+                cap.release()
+                if attempt + 1 < attempts:
+                    time.sleep(0.5)
 
-            if not self._cap.isOpened():
+            if self._cap is None or not self._cap.isOpened():
                 raise RuntimeError(
-                    f"Failed to open camera {self.display_index} " f"(cv2 index {cv2_index})"
+                    f"Failed to open camera {self.display_index} "
+                    f"(cv2 index {cv2_index}, backend={backend_name})"
                 )
         except Exception:
             with _camera_lock:
@@ -346,12 +491,28 @@ class CameraCaptureStream(CaptureStream):
 
         self._cv2_index = cv2_index
 
-        # Apply optional resolution override
-        res_w = self.config.get("resolution_width", 0)
-        res_h = self.config.get("resolution_height", 0)
-        if res_w > 0 and res_h > 0:
-            self._cap.set(cv2.CAP_PROP_FRAME_WIDTH, res_w)
-            self._cap.set(cv2.CAP_PROP_FRAME_HEIGHT, res_h)
+        # Resolve effective resolution.
+        # Priority: legacy `resolution_width`/`resolution_height` (if both > 0)
+        #         → new `resolution` enum string (e.g. "1920x1080" or "auto")
+        #         → "auto" (open at the camera's max).
+        # On Windows DShow/MSMF the default opening mode is typically 640x480
+        # regardless of the camera's hardware ceiling, so when no explicit
+        # override is given we ask for the highest mode the device supports
+        # by setting an absurdly large frame size — drivers clamp down to the
+        # nearest supported mode.
+        legacy_w = self.config.get("resolution_width", 0) or 0
+        legacy_h = self.config.get("resolution_height", 0) or 0
+        if legacy_w > 0 and legacy_h > 0:
+            target_w, target_h = legacy_w, legacy_h
+        else:
+            parsed = _parse_resolution(self.config.get("resolution", "auto"))
+            if parsed is not None:
+                target_w, target_h = parsed
+            else:
+                target_w, target_h = _PROBE_MAX_DIM, _PROBE_MAX_DIM
+
+        self._cap.set(cv2.CAP_PROP_FRAME_WIDTH, target_w)
+        self._cap.set(cv2.CAP_PROP_FRAME_HEIGHT, target_h)
 
         # Test read
         ret, frame = self._cap.read()
@@ -434,10 +595,20 @@ class CameraEngine(CaptureEngine):
 
     @classmethod
     def get_default_config(cls) -> Dict[str, Any]:
+        # `resolution` is the user-facing control. Legacy numeric overrides
+        # `resolution_width`/`resolution_height` are still honored if present
+        # in stored configs (see CameraCaptureStream.initialize), but are no
+        # longer surfaced in the default config — the dropdown replaces them.
         return {
             "camera_backend": _get_default_backend(),
-            "resolution_width": 0,
-            "resolution_height": 0,
+            "resolution": "auto",
+        }
+
+    @classmethod
+    def get_config_choices(cls) -> Dict[str, List[str]]:
+        return {
+            "camera_backend": _get_supported_backends(),
+            "resolution": list(_RESOLUTION_CHOICES),
         }
 
     @classmethod

server/src/ledgrab/core/demo_seed.py

@@ -32,7 +32,6 @@ _PS_IDS = {
 
 _CSS_IDS = {
     "gradient": "css_demo0001",
-    "cycle": "css_demo0002",
     "picture": "css_demo0003",
     "audio": "css_demo0004",
 }
@@ -267,22 +266,6 @@ def _build_color_strip_sources() -> dict:
             "created_at": _NOW,
             "updated_at": _NOW,
         },
-        _CSS_IDS["cycle"]: {
-            "id": _CSS_IDS["cycle"],
-            "name": "Warm Color Cycle",
-            "source_type": "color_cycle",
-            "description": "Smoothly cycles through warm colors",
-            "clock_id": None,
-            "tags": ["demo"],
-            "colors": [
-                [255, 60, 0],
-                [255, 140, 0],
-                [255, 200, 50],
-                [255, 100, 20],
-            ],
-            "created_at": _NOW,
-            "updated_at": _NOW,
-        },
         _CSS_IDS["picture"]: {
             "id": _CSS_IDS["picture"],
             "name": "Screen Capture — Main Display",

server/src/ledgrab/core/processing/color_strip/__init__.py

@@ -6,7 +6,6 @@ via the shim module ``color_strip_stream.py``.
 """
 
 from .base import ColorStripStream, _SimpleNoise1D, _gradient_noise
-from .cycle import ColorCycleColorStripStream
 from .gradient import GradientColorStripStream
 from .helpers import _compute_gradient_colors
 from .picture import PictureColorStripStream
@@ -16,7 +15,6 @@ __all__ = [
     "ColorStripStream",
     "PictureColorStripStream",
     "StaticColorStripStream",
-    "ColorCycleColorStripStream",
     "GradientColorStripStream",
     "_compute_gradient_colors",
     "_SimpleNoise1D",

server/src/ledgrab/core/processing/color_strip/cycle.py

@@ -1,185 +0,0 @@
-"""Color cycle stream — smoothly cycles through user-defined colors."""
-
-import threading
-import time
-from typing import Optional
-
-import numpy as np
-
-from ledgrab.utils import get_logger
-from ledgrab.utils.frame_limiter import FrameLimiter
-from ledgrab.utils.timer import high_resolution_timer
-
-from .base import ColorStripStream
-
-logger = get_logger(__name__)
-
-
-class ColorCycleColorStripStream(ColorStripStream):
-    """Color strip stream that smoothly cycles through a user-defined color list.
-
-    All LEDs receive the same solid color at any moment, continuously interpolating
-    between the configured colors in a loop.
-
-    LED count auto-sizes from the connected device when led_count == 0 in
-    the source config; configure(device_led_count) is called by
-    WledTargetProcessor on start.
-    """
-
-    def __init__(self, source):
-        self._colors_lock = threading.Lock()
-        self._running = False
-        self._thread: Optional[threading.Thread] = None
-        self._fps = 30
-        self._frame_time = 1.0 / 30
-        self._clock = None  # optional SyncClockRuntime
-        self._update_from_source(source)
-
-    def _update_from_source(self, source) -> None:
-        raw = source.colors if isinstance(source.colors, list) else []
-        default = [
-            [255, 0, 0],
-            [255, 255, 0],
-            [0, 255, 0],
-            [0, 255, 255],
-            [0, 0, 255],
-            [255, 0, 255],
-        ]
-        self._color_list = [c for c in raw if isinstance(c, list) and len(c) == 3] or default
-        _lc = getattr(source, "led_count", 0)
-        self._auto_size = not _lc
-        self._led_count = _lc if _lc > 0 else 1
-        self._rebuild_colors()
-
-    def _rebuild_colors(self) -> None:
-        pixel = np.array(self._color_list[0], dtype=np.uint8)
-        colors = np.tile(pixel, (self._led_count, 1))
-        with self._colors_lock:
-            self._colors = colors
-
-    def configure(self, device_led_count: int) -> None:
-        """Size to device LED count when led_count was 0 (auto-size)."""
-        if self._auto_size and device_led_count > 0 and device_led_count != self._led_count:
-            self._led_count = device_led_count
-            self._rebuild_colors()
-            logger.debug(f"ColorCycleColorStripStream auto-sized to {device_led_count} LEDs")
-
-    @property
-    def target_fps(self) -> int:
-        return self._fps
-
-    @property
-    def led_count(self) -> int:
-        return self._led_count
-
-    def set_capture_fps(self, fps: int) -> None:
-        """Update animation loop rate. Thread-safe (read atomically by the loop)."""
-        fps = max(1, min(90, fps))
-        self._fps = fps
-        self._frame_time = 1.0 / fps
-
-    def start(self) -> None:
-        if self._running:
-            return
-        self._running = True
-        self._thread = threading.Thread(
-            target=self._animate_loop,
-            name="css-color-cycle",
-            daemon=True,
-        )
-        self._thread.start()
-        logger.info(
-            f"ColorCycleColorStripStream started (leds={self._led_count}, colors={len(self._color_list)})"
-        )
-
-    def stop(self) -> None:
-        self._running = False
-        if self._thread:
-            self._thread.join(timeout=5.0)
-            if self._thread.is_alive():
-                logger.warning(
-                    "ColorCycleColorStripStream animate thread did not terminate within 5s"
-                )
-            self._thread = None
-        logger.info("ColorCycleColorStripStream stopped")
-
-    def get_latest_colors(self) -> Optional[np.ndarray]:
-        with self._colors_lock:
-            return self._colors
-
-    def update_source(self, source) -> None:
-        from ledgrab.storage.color_strip_source import ColorCycleColorStripSource
-
-        if isinstance(source, ColorCycleColorStripSource):
-            prev_led_count = self._led_count if self._auto_size else None
-            self._update_from_source(source)
-            if prev_led_count and self._auto_size:
-                self._led_count = prev_led_count
-                self._rebuild_colors()
-            logger.info("ColorCycleColorStripStream params updated in-place")
-
-    def set_clock(self, clock) -> None:
-        """Set or clear the sync clock runtime. Thread-safe (read atomically by loop)."""
-        self._clock = clock
-
-    def _animate_loop(self) -> None:
-        """Background thread: interpolate between colors at target fps.
-
-        Uses double-buffered output arrays to avoid per-frame allocations.
-        """
-        _pool_n = 0
-        _buf_a = _buf_b = None
-        _use_a = True
-
-        limiter = FrameLimiter(self._fps)
-
-        try:
-            with high_resolution_timer():
-                while self._running:
-                    limiter.begin()
-                    wall_start = time.perf_counter()
-                    frame_time = self._frame_time
-                    try:
-                        color_list = self._color_list
-                        clock = self._clock
-                        if clock:
-                            if not clock.is_running:
-                                time.sleep(0.1)
-                                continue
-                            speed = clock.speed
-                            t = clock.get_time()
-                        else:
-                            speed = 1.0
-                            t = wall_start
-                        n = self._led_count
-                        num = len(color_list)
-                        if num >= 2:
-                            if n != _pool_n:
-                                _pool_n = n
-                                _buf_a = np.empty((n, 3), dtype=np.uint8)
-                                _buf_b = np.empty((n, 3), dtype=np.uint8)
-
-                            buf = _buf_a if _use_a else _buf_b
-                            _use_a = not _use_a
-
-                            # 0.05 factor → one full cycle every 20s at speed=1.0
-                            cycle_pos = (speed * t * 0.05) % 1.0
-                            seg = cycle_pos * num
-                            idx = int(seg) % num
-                            t_i = seg - int(seg)
-                            c1 = color_list[idx]
-                            c2 = color_list[(idx + 1) % num]
-                            buf[:] = (
-                                min(255, int(c1[0] + (c2[0] - c1[0]) * t_i)),
-                                min(255, int(c1[1] + (c2[1] - c1[1]) * t_i)),
-                                min(255, int(c1[2] + (c2[2] - c1[2]) * t_i)),
-                            )
-                            with self._colors_lock:
-                                self._colors = buf
-                    except Exception as e:
-                        logger.error(f"ColorCycleColorStripStream animation error: {e}")
-                    limiter.wait(frame_time)
-        except Exception as e:
-            logger.error(f"Fatal ColorCycleColorStripStream loop error: {e}", exc_info=True)
-        finally:
-            self._running = False

server/src/ledgrab/core/processing/color_strip/static.py

@@ -73,7 +73,14 @@ class StaticColorStripStream(ColorStripStream):
     @property
     def is_animated(self) -> bool:
         anim = self._animation
-        return bool(anim and anim.get("enabled"))
+        if anim and anim.get("enabled"):
+            return True
+        return self._is_color_bound()
+
+    def _is_color_bound(self) -> bool:
+        """True when the `color` property is driven by a ValueStream."""
+        vs = self._value_streams
+        return bool(vs and vs.get("color"))
 
     @property
     def led_count(self) -> int:
@@ -243,10 +250,28 @@ class StaticColorStripStream(ColorStripStream):
                             if colors is not None:
                                 with self._colors_lock:
                                     self._colors = colors
+                        elif self._is_color_bound():
+                            # No animation, but color is driven by a ValueStream —
+                            # poll and forward live color updates so the bound
+                            # source is honoured (otherwise LEDs stay stuck on
+                            # the static fallback).
+                            n = self._led_count
+                            if n != _pool_n:
+                                _pool_n = n
+                                _buf_a = np.empty((n, 3), dtype=np.uint8)
+                                _buf_b = np.empty((n, 3), dtype=np.uint8)
+                            buf = _buf_a if _use_a else _buf_b
+                            _use_a = not _use_a
+                            buf[:] = self.resolve_color("color", self._source_color)
+                            with self._colors_lock:
+                                self._colors = buf
                     except Exception as e:
                         logger.error(f"StaticColorStripStream animation error: {e}")
 
-                    sleep_target = frame_time if anim and anim.get("enabled") else 0.25
+                    if (anim and anim.get("enabled")) or self._is_color_bound():
+                        sleep_target = frame_time
+                    else:
+                        sleep_target = 0.25
                     limiter.wait(sleep_target)
         except Exception as e:
             logger.error(f"Fatal StaticColorStripStream loop error: {e}", exc_info=True)

server/src/ledgrab/core/processing/color_strip_stream.py

@@ -6,7 +6,6 @@ import path ``from ledgrab.core.processing.color_strip_stream import X``.
 """
 
 from ledgrab.core.processing.color_strip import (  # noqa: F401
-    ColorCycleColorStripStream,
     ColorStripStream,
     GradientColorStripStream,
     PictureColorStripStream,
@@ -20,7 +19,6 @@ __all__ = [
     "ColorStripStream",
     "PictureColorStripStream",
     "StaticColorStripStream",
-    "ColorCycleColorStripStream",
     "GradientColorStripStream",
     "_compute_gradient_colors",
     "_SimpleNoise1D",

server/src/ledgrab/core/processing/color_strip_stream_manager.py

@@ -3,7 +3,7 @@
 PictureColorStripStreams (expensive screen capture) are shared across multiple
 consumers via reference counting — processing runs once, not once per target.
 
-Count-dependent streams (static, gradient, color cycle, effect) are NOT shared.
+Count-dependent streams (static, gradient, effect) are NOT shared.
 Each consumer gets its own instance so it can configure an independent LED count
 without interfering with other targets.
 """
@@ -12,7 +12,6 @@ from dataclasses import dataclass
 from typing import Dict, Optional
 
 from ledgrab.core.processing.color_strip_stream import (
-    ColorCycleColorStripStream,
     ColorStripStream,
     GradientColorStripStream,
     PictureColorStripStream,
@@ -34,7 +33,6 @@ logger = get_logger(__name__)
 _SIMPLE_STREAM_MAP = {
     "static": StaticColorStripStream,
     "gradient": GradientColorStripStream,
-    "color_cycle": ColorCycleColorStripStream,
     "effect": EffectColorStripStream,
     "api_input": ApiInputColorStripStream,
     "notification": NotificationColorStripStream,

server/src/ledgrab/core/processing/daylight_settings.py

@@ -0,0 +1,87 @@
+"""Global daylight cycle preferences.
+
+A single timezone applies to every daylight value source / color strip
+source on the server, so it lives in the key/value settings table rather
+than on each entity. The daylight streams read it on every wall-clock
+sample (cheap dict lookup with a short cache window) so changing it in
+the UI takes effect within ~1 second.
+"""
+
+from __future__ import annotations
+
+import threading
+import time
+from typing import Optional
+
+from ledgrab.utils import get_logger
+
+logger = get_logger(__name__)
+
+DAYLIGHT_TIMEZONE_KEY = "daylight_timezone"
+_CACHE_TTL_SECONDS = 1.0
+
+_lock = threading.Lock()
+_cached_tz: str = ""
+_cached_at: float = 0.0
+
+
+def _read_from_db() -> str:
+    """Read the persisted timezone from the settings table.
+
+    Returns an empty string when unset, the table is unavailable, or
+    the stored value is corrupt — empty means "use system local time".
+    """
+    try:
+        from ledgrab.api.dependencies import get_database
+
+        raw = get_database().get_setting(DAYLIGHT_TIMEZONE_KEY)
+    except Exception as e:  # pragma: no cover — DB not initialised yet, e.g. in tests
+        logger.debug("daylight timezone DB read failed: %s", e)
+        return ""
+    if not isinstance(raw, dict):
+        return ""
+    value = raw.get("value")
+    return str(value) if isinstance(value, str) else ""
+
+
+def get_daylight_timezone() -> str:
+    """Return the configured global daylight timezone (cached briefly)."""
+    global _cached_tz, _cached_at
+
+    now = time.monotonic()
+    with _lock:
+        if now - _cached_at < _CACHE_TTL_SECONDS:
+            return _cached_tz
+
+    fresh = _read_from_db()
+    with _lock:
+        _cached_tz = fresh
+        _cached_at = now
+    return fresh
+
+
+def set_daylight_timezone(tz: Optional[str]) -> str:
+    """Persist the global daylight timezone and refresh the cache.
+
+    Returns the canonicalised stored value (empty string for None / blank).
+    """
+    canonical = str(tz or "").strip()
+    try:
+        from ledgrab.api.dependencies import get_database
+
+        get_database().set_setting(DAYLIGHT_TIMEZONE_KEY, {"value": canonical})
+    except Exception as e:
+        logger.warning("Failed to persist daylight timezone: %s", e)
+
+    global _cached_tz, _cached_at
+    with _lock:
+        _cached_tz = canonical
+        _cached_at = time.monotonic()
+    return canonical
+
+
+def invalidate_cache() -> None:
+    """Force the next ``get_daylight_timezone`` call to re-read from DB."""
+    global _cached_at
+    with _lock:
+        _cached_at = 0.0

server/src/ledgrab/core/processing/daylight_stream.py

@@ -22,8 +22,33 @@ from ledgrab.utils import get_logger
 from ledgrab.utils.frame_limiter import FrameLimiter
 from ledgrab.utils.timer import high_resolution_timer
 
+try:
+    from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
+except ImportError:  # pragma: no cover — pre-3.9 fallback, not expected in target envs
+    ZoneInfo = None  # type: ignore[assignment]
+
+    class ZoneInfoNotFoundError(Exception):  # type: ignore[no-redef]
+        pass
+
+
 logger = get_logger(__name__)
 
+
+def _now_in_tz(tz_name: str) -> datetime.datetime:
+    """Return current wall-clock time in the named IANA timezone.
+
+    Empty string means "use system local time". Unknown timezones fall
+    back to local time and log a warning once per unknown name.
+    """
+    if not tz_name or ZoneInfo is None:
+        return datetime.datetime.now()
+    try:
+        return datetime.datetime.now(ZoneInfo(tz_name))
+    except ZoneInfoNotFoundError:
+        logger.warning(f"Unknown daylight timezone '{tz_name}' — falling back to system local")
+        return datetime.datetime.now()
+
+
 # ── Daylight color table ────────────────────────────────────────────────
 #
 # Canonical hour control points (0–24) → RGB.  Designed for a default
@@ -62,13 +87,19 @@ _daylight_lut: Optional[np.ndarray] = None
 # ── Solar position helpers ──────────────────────────────────────────────
 
 
-def _compute_solar_times(latitude: float, longitude: float, day_of_year: int) -> tuple:
-    """Return (sunrise_hour, sunset_hour) in local solar time.
+def _compute_solar_times(
+    latitude: float,
+    longitude: float,
+    day_of_year: int,
+    utc_offset_hours: float = 0.0,
+) -> tuple:
+    """Return (sunrise_hour, sunset_hour) in the user's wall-clock time.
 
     Uses simplified NOAA solar equations:
       - declination: decl = 23.45 * sin(2π * (284 + doy) / 365)
       - hour angle:  cos(ha) = -tan(lat) * tan(decl)
-      - sunrise/sunset: 12 ∓ ha/15, shifted by longitude
+      - solar noon (UTC): 12 - longitude/15
+      - wall-clock sunrise/sunset: solar_noon_utc + utc_offset ∓ ha/15
 
     Polar day and polar night are clamped to visible ranges.
     """
@@ -79,28 +110,48 @@ def _compute_solar_times(latitude: float, longitude: float, day_of_year: int) ->
     lat_rad = latitude * deg2rad
 
     cos_ha = -math.tan(lat_rad) * math.tan(decl_rad)
+    solar_noon_utc = 12.0 - longitude / 15.0
+    solar_noon_local = solar_noon_utc + utc_offset_hours
 
     if cos_ha <= -1.0:
-        # Polar day — sun never sets
-        sunrise = 3.0
-        sunset = 21.0
+        # Polar day — sun never sets; fake a long visible window
+        sunrise = solar_noon_local - 9.0
+        sunset = solar_noon_local + 9.0
     elif cos_ha >= 1.0:
-        # Polar night — sun never rises
-        sunrise = 12.0
-        sunset = 12.0
+        # Polar night — sun never rises; collapse to noon
+        sunrise = solar_noon_local
+        sunset = solar_noon_local
     else:
         ha_hours = math.acos(cos_ha) / (deg2rad * 15.0)
-        lon_offset = longitude / 15.0
-        solar_noon = 12.0 - lon_offset
-        sunrise = solar_noon - ha_hours
-        sunset = solar_noon + ha_hours
+        sunrise = solar_noon_local - ha_hours
+        sunset = solar_noon_local + ha_hours
 
-    # Clamp to sane ranges
-    sunrise = max(3.0, min(10.0, sunrise))
-    sunset = max(14.0, min(21.0, sunset))
+    # Clamp to a safe range the LUT builder can render. With reasonable
+    # tz/longitude pairs sunrise lands in (3..10) and sunset in (14..21);
+    # we widen the clamp so weird tz/lon combinations still produce a
+    # usable curve instead of dividing by zero.
+    sunrise = max(0.5, min(11.5, sunrise))
+    sunset = max(12.5, min(23.5, sunset))
     return sunrise, sunset
 
 
+def _utc_offset_hours_for(tz_name: str, when: Optional[datetime.datetime] = None) -> float:
+    """Return the UTC offset (in hours) for the given IANA timezone.
+
+    Empty/unknown tz falls back to the system local offset for ``when``.
+    """
+    when = when or datetime.datetime.now()
+    if tz_name and ZoneInfo is not None:
+        try:
+            offset = when.replace(tzinfo=None).astimezone(ZoneInfo(tz_name)).utcoffset()
+            if offset is not None:
+                return offset.total_seconds() / 3600.0
+        except ZoneInfoNotFoundError:
+            pass
+    local_offset = when.astimezone().utcoffset()
+    return local_offset.total_seconds() / 3600.0 if local_offset else 0.0
+
+
 def _build_lut_for_solar_times(sunrise: float, sunset: float) -> np.ndarray:
     """Build a 1440-entry uint8 RGB LUT scaled to the given sunrise/sunset hours.
 
@@ -198,9 +249,11 @@ class DaylightColorStripStream(ColorStripStream):
         with self._colors_lock:
             self._colors: Optional[np.ndarray] = None
 
-    def _get_lut_for_day(self, day_of_year: int) -> np.ndarray:
+    def _get_lut_for_day(self, day_of_year: int, utc_offset_hours: float = 0.0) -> np.ndarray:
         """Return a solar-time-aware LUT for the given day (cached)."""
-        sunrise, sunset = _compute_solar_times(self._latitude, self._longitude, day_of_year)
+        sunrise, sunset = _compute_solar_times(
+            self._latitude, self._longitude, day_of_year, utc_offset_hours
+        )
         sr_key = int(round(sunrise * 60))
         ss_key = int(round(sunset * 60))
         cache_key = (sr_key, ss_key)
@@ -304,10 +357,16 @@ class DaylightColorStripStream(ColorStripStream):
                         buf = _buf_a if _use_a else _buf_b
                         _use_a = not _use_a
 
+                        from ledgrab.core.processing.daylight_settings import (
+                            get_daylight_timezone,
+                        )
+
+                        tz_name = get_daylight_timezone()
                         if self._use_real_time:
-                            now = datetime.datetime.now()
+                            now = _now_in_tz(tz_name)
                             day_of_year = now.timetuple().tm_yday
                             minute_of_day = now.hour * 60 + now.minute + now.second / 60.0
+                            utc_offset_hours = _utc_offset_hours_for(tz_name, now)
                         else:
                             # Simulated: speed=1.0 → full 24h in 240s.
                             # Use summer solstice (day 172) for maximum day length.
@@ -315,8 +374,9 @@ class DaylightColorStripStream(ColorStripStream):
                             cycle_seconds = 240.0 / max(speed, 0.01)
                             phase = (t % cycle_seconds) / cycle_seconds
                             minute_of_day = phase * 1440.0
+                            utc_offset_hours = _utc_offset_hours_for(tz_name)
 
-                        lut = self._get_lut_for_day(day_of_year)
+                        lut = self._get_lut_for_day(day_of_year, utc_offset_hours)
                         idx = int(minute_of_day) % 1440
                         color = lut[idx]
                         buf[:] = color

server/src/ledgrab/core/processing/processor_manager.py

@@ -167,6 +167,7 @@ class ProcessorManager(AutoRestartMixin, DeviceHealthMixin, DeviceTestModeMixin)
                 gradient_store=deps.gradient_store,
                 event_bus=deps.game_event_bus,
                 audio_processing_template_store=deps.audio_processing_template_store,
+                sync_clock_manager=deps.sync_clock_manager,
             )
             if deps.value_source_store
             else None

server/src/ledgrab/core/processing/value_stream.py

@@ -37,6 +37,7 @@ if TYPE_CHECKING:
     from ledgrab.core.home_assistant.ha_manager import HomeAssistantManager
     from ledgrab.core.processing.color_strip_stream_manager import ColorStripStreamManager
     from ledgrab.core.processing.live_stream_manager import LiveStreamManager
+    from ledgrab.core.processing.sync_clock_manager import SyncClockManager
     from ledgrab.storage.audio_source_store import AudioSourceStore
     from ledgrab.storage.value_source import ValueSource
     from ledgrab.storage.value_source_store import ValueSourceStore
@@ -599,31 +600,61 @@ class DaylightValueStream(ValueStream):
         speed: float = 1.0,
         use_real_time: bool = False,
         latitude: float = 50.0,
+        longitude: float = 0.0,
         min_value: float = 0.0,
         max_value: float = 1.0,
     ):
         from ledgrab.core.processing.daylight_stream import _get_daylight_lut
 
-        self._lut = _get_daylight_lut()
+        self._default_lut = _get_daylight_lut()
         self._speed = speed
         self._use_real_time = use_real_time
         self._latitude = latitude
+        self._longitude = longitude
         self._min = min_value
         self._max = max_value
         self._start_time = time.perf_counter()
+        # Cache: (sr_min, ss_min) → LUT, mirroring DaylightColorStripStream
+        self._lut_cache: Dict[Tuple[int, int], np.ndarray] = {}
+
+    def _resolve_lut(self, day_of_year: Optional[int], utc_offset_hours: float) -> np.ndarray:
+        if day_of_year is None:
+            return self._default_lut
+        from ledgrab.core.processing.daylight_stream import (
+            _build_lut_for_solar_times,
+            _compute_solar_times,
+        )
+
+        sr, ss = _compute_solar_times(
+            self._latitude, self._longitude, day_of_year, utc_offset_hours
+        )
+        key = (int(round(sr * 60)), int(round(ss * 60)))
+        lut = self._lut_cache.get(key)
+        if lut is None:
+            lut = _build_lut_for_solar_times(sr, ss)
+            if len(self._lut_cache) > 8:
+                self._lut_cache.clear()
+            self._lut_cache[key] = lut
+        return lut
 
     def get_value(self) -> float:
+        from ledgrab.core.processing.daylight_settings import get_daylight_timezone
+        from ledgrab.core.processing.daylight_stream import _now_in_tz, _utc_offset_hours_for
+
+        tz_name = get_daylight_timezone()
         if self._use_real_time:
-            now = datetime.now()
+            now = _now_in_tz(tz_name)
             minute_of_day = now.hour * 60 + now.minute + now.second / 60.0
+            lut = self._resolve_lut(now.timetuple().tm_yday, _utc_offset_hours_for(tz_name, now))
         else:
             t_elapsed = time.perf_counter() - self._start_time
             cycle_seconds = 240.0 / max(self._speed, 0.01)
             phase = (t_elapsed % cycle_seconds) / cycle_seconds
             minute_of_day = phase * 1440.0
+            lut = self._default_lut
 
         idx = int(minute_of_day) % 1440
-        r, g, b = self._lut[idx]
+        r, g, b = lut[idx]
 
         # BT.601 luminance → 0..1
         luminance = (0.299 * float(r) + 0.587 * float(g) + 0.114 * float(b)) / 255.0
@@ -637,8 +668,10 @@ class DaylightValueStream(ValueStream):
             self._speed = source.speed
             self._use_real_time = source.use_real_time
             self._latitude = source.latitude
+            self._longitude = source.longitude
             self._min = source.min_value
             self._max = source.max_value
+            self._lut_cache.clear()
 
 
 # ---------------------------------------------------------------------------
@@ -669,10 +702,34 @@ class StaticColorValueStream(ValueStream):
         )
 
 
-class AnimatedColorValueStream(ValueStream):
-    """Cycles through a list of colors over time."""
+def _ease_color_frac(t: float, easing: str) -> float:
+    """Remap a 0..1 segment fraction through a named easing curve.
 
-    def __init__(self, colors, speed=10.0, easing="linear"):
+    Unknown names fall back to linear so older configs and forward-compat
+    payloads keep working.
+    """
+    if easing == "ease_in":
+        return t * t * t
+    if easing == "ease_out":
+        u = 1.0 - t
+        return 1.0 - u * u * u
+    if easing == "ease_in_out":
+        return t * t * (3.0 - 2.0 * t)
+    if easing == "sine":
+        return 0.5 - 0.5 * math.cos(math.pi * t)
+    return t
+
+
+class AnimatedColorValueStream(ValueStream):
+    """Cycles through a list of colors over time.
+
+    When a ``clock`` runtime is provided, animation is driven by the
+    clock's pause-aware elapsed time and speed multiplier so multiple
+    streams sharing the same clock stay in lockstep. When no clock is
+    set, falls back to wall-clock time scaled by ``speed`` (cycles/min).
+    """
+
+    def __init__(self, colors, speed=10.0, easing="linear", clock=None):
         self._colors = [
             (int(c[0]), int(c[1]), int(c[2]))
             for c in (colors or [[255, 0, 0], [0, 255, 0], [0, 0, 255]])
@@ -681,24 +738,47 @@ class AnimatedColorValueStream(ValueStream):
         self._speed = max(0.01, float(speed))
         self._easing = easing
         self._start_time = 0.0
+        self._clock = clock
+        # Last frame state — held while the clock is paused so get_color()
+        # returns a stable color instead of jumping.
+        self._last_phase = 0.0
 
     def start(self) -> None:
         self._start_time = time.monotonic()
 
+    def set_clock(self, clock) -> None:
+        """Set or clear the sync clock runtime. Thread-safe (atomic ref swap)."""
+        self._clock = clock
+
     def get_value(self) -> float:
         r, g, b = self.get_color()
         return (0.299 * r + 0.587 * g + 0.114 * b) / 255.0
 
     def get_color(self) -> tuple:
+        clock = self._clock
+        n = len(self._colors)
+        if clock is not None:
+            # Clock provides real elapsed seconds (pause-aware) and a speed
+            # multiplier. We treat self._speed as the base cpm and apply the
+            # clock's speed on top, matching the convention used by CSS
+            # animation streams.
+            cycle_time = 60.0 / max(0.01, self._speed * float(clock.speed))
+            if not clock.is_running:
+                phase = self._last_phase
+            else:
+                elapsed = clock.get_time()
+                phase = (elapsed / cycle_time * n) % n
+                self._last_phase = phase
+        else:
             elapsed = time.monotonic() - self._start_time
             cycle_time = 60.0 / self._speed
-        n = len(self._colors)
-        if self._easing == "step":
-            idx = int((elapsed / cycle_time * n) % n)
-            return self._colors[idx]
             phase = (elapsed / cycle_time * n) % n
+            self._last_phase = phase
+
+        if self._easing == "step":
+            return self._colors[int(phase) % n]
         idx = int(phase)
-        frac = phase - idx
+        frac = _ease_color_frac(phase - idx, self._easing)
         c1 = self._colors[idx % n]
         c2 = self._colors[(idx + 1) % n]
         return (
@@ -1466,6 +1546,7 @@ class ValueStreamManager:
         gradient_store: Optional[Any] = None,
         event_bus: Optional["GameEventBus"] = None,
         audio_processing_template_store=None,
+        sync_clock_manager: Optional["SyncClockManager"] = None,
     ):
         self._value_source_store = value_source_store
         self._audio_capture_manager = audio_capture_manager
@@ -1477,8 +1558,12 @@ class ValueStreamManager:
         self._gradient_store = gradient_store
         self._event_bus = event_bus
         self._audio_processing_template_store = audio_processing_template_store
+        self._sync_clock_manager = sync_clock_manager
         self._streams: Dict[str, ValueStream] = {}  # vs_id → stream
         self._ref_counts: Dict[str, int] = {}  # vs_id → ref count
+        # Tracks which clock_id (if any) was acquired for each stream so we
+        # can release/swap it without re-querying the store at teardown time.
+        self._stream_clock_ids: Dict[str, str] = {}  # vs_id → clock_id
 
     def acquire(self, vs_id: str) -> ValueStream:
         """Get or create a shared ValueStream for the given ValueSource.
@@ -1492,7 +1577,7 @@ class ValueStreamManager:
             return self._streams[vs_id]
 
         source = self._value_source_store.get_source(vs_id)
-        stream = self._create_stream(source)
+        stream = self._create_stream(source, vs_id)
         stream.start()
         self._streams[vs_id] = stream
         self._ref_counts[vs_id] = 1
@@ -1512,6 +1597,7 @@ class ValueStreamManager:
             if stream:
                 stream.stop()
             del self._ref_counts[vs_id]
+            self._release_clock_for(vs_id)
             logger.info(f"Released value stream {vs_id} (last ref)")
         else:
             logger.info(f"Released ref for value stream {vs_id} (refs={refs})")
@@ -1527,8 +1613,53 @@ class ValueStreamManager:
         stream = self._streams.get(vs_id)
         if stream:
             stream.update_source(source)
+            self._sync_clock_binding(vs_id, source, stream)
             logger.debug(f"Updated value stream {vs_id}")
 
+    def _sync_clock_binding(self, vs_id: str, source: "ValueSource", stream: ValueStream) -> None:
+        """Hot-swap the sync-clock runtime attached to *stream* if needed."""
+        if not self._sync_clock_manager or not hasattr(stream, "set_clock"):
+            return
+        new_clock_id = getattr(source, "clock_id", None) or None
+        old_clock_id = self._stream_clock_ids.get(vs_id)
+        if new_clock_id == old_clock_id:
+            return
+        new_runtime = None
+        if new_clock_id:
+            try:
+                new_runtime = self._sync_clock_manager.acquire(new_clock_id)
+            except Exception as e:
+                logger.warning(
+                    "Could not acquire sync clock %s for value stream %s: %s",
+                    new_clock_id,
+                    vs_id,
+                    e,
+                )
+                new_runtime = None
+                new_clock_id = None
+        try:
+            stream.set_clock(new_runtime)
+        except Exception as e:
+            logger.warning("set_clock failed on value stream %s: %s", vs_id, e)
+        if new_clock_id:
+            self._stream_clock_ids[vs_id] = new_clock_id
+        else:
+            self._stream_clock_ids.pop(vs_id, None)
+        if old_clock_id:
+            try:
+                self._sync_clock_manager.release(old_clock_id)
+            except Exception as e:
+                logger.debug("Sync clock release for %s: %s", old_clock_id, e)
+
+    def _release_clock_for(self, vs_id: str) -> None:
+        """Release the sync clock acquired for *vs_id* (if any)."""
+        clock_id = self._stream_clock_ids.pop(vs_id, None)
+        if clock_id and self._sync_clock_manager:
+            try:
+                self._sync_clock_manager.release(clock_id)
+            except Exception as e:
+                logger.debug("Sync clock release for %s: %s", clock_id, e)
+
     def refresh_audio_filter_pipelines(self, template_id: str) -> None:
         """Rebuild audio filter pipelines for any running AudioValueStream
         that references the given audio processing template ID.
@@ -1555,11 +1686,19 @@ class ValueStreamManager:
                 stream.stop()
             except Exception as e:
                 logger.error(f"Error stopping value stream {vs_id}: {e}")
+        # Release any sync clocks held by streams.
+        if self._sync_clock_manager:
+            for vs_id, clock_id in self._stream_clock_ids.items():
+                try:
+                    self._sync_clock_manager.release(clock_id)
+                except Exception as e:
+                    logger.debug("Sync clock release for %s during shutdown: %s", clock_id, e)
+        self._stream_clock_ids.clear()
         self._streams.clear()
         self._ref_counts.clear()
         logger.info("Released all value streams")
 
-    def _create_stream(self, source: "ValueSource") -> ValueStream:
+    def _create_stream(self, source: "ValueSource", vs_id: Optional[str] = None) -> ValueStream:
         """Factory: create the appropriate ValueStream for a ValueSource."""
         from ledgrab.storage.value_source import (
             AdaptiveValueSource,
@@ -1608,6 +1747,7 @@ class ValueStreamManager:
                 speed=source.speed,
                 use_real_time=source.use_real_time,
                 latitude=source.latitude,
+                longitude=source.longitude,
                 min_value=source.min_value,
                 max_value=source.max_value,
             )
@@ -1634,10 +1774,24 @@ class ValueStreamManager:
             return StaticColorValueStream(color=source.color)
 
         if isinstance(source, AnimatedColorValueSource):
+            clock_runtime = None
+            if source.clock_id and self._sync_clock_manager:
+                try:
+                    clock_runtime = self._sync_clock_manager.acquire(source.clock_id)
+                    if vs_id is not None:
+                        self._stream_clock_ids[vs_id] = source.clock_id
+                except Exception as e:
+                    logger.warning(
+                        "Could not acquire sync clock %s for value source %s: %s",
+                        source.clock_id,
+                        source.id,
+                        e,
+                    )
             return AnimatedColorValueStream(
                 colors=source.colors,
                 speed=source.speed,
                 easing=source.easing,
+                clock=clock_runtime,
             )
 
         if isinstance(source, AdaptiveTimeColorValueSource):

server/src/ledgrab/static/css/components.css

@@ -1159,6 +1159,116 @@ textarea:focus-visible {
     font-size: 0.9rem;
 }
 
+/* ── Timezone picker (Settings modal) ──────────────────────
+   Refined "instrument readout" trigger that matches the lux
+   sectional design language used in the rest of the modal:
+   - hairline border, deeper bg, monospaced offset chip
+   - region icon stenciled in --ch-cyan to echo section dots
+   - subtle hover glow on the channel hue, not the primary green */
+
+.tz-picker-wrap {
+    position: relative;
+    display: block;
+    isolation: isolate;
+}
+
+.tz-picker-wrap .entity-select-trigger {
+    --tz-ch: var(--ch-cyan, var(--primary-color));
+    background: var(--lux-bg-1, var(--bg-color));
+    border: var(--lux-hairline, 1px) solid var(--lux-line, var(--border-color));
+    border-radius: var(--lux-r-md, 6px);
+    padding: 10px 12px;
+    gap: 12px;
+    font-feature-settings: "ss01", "tnum";
+    font-variant-numeric: tabular-nums;
+    color: var(--lux-ink, var(--text-color));
+    transition:
+        border-color 180ms var(--ease-out, ease-out),
+        background 180ms var(--ease-out, ease-out),
+        box-shadow 220ms var(--ease-out, ease-out);
+}
+
+.tz-picker-wrap .entity-select-trigger::before {
+    content: "";
+    position: absolute;
+    inset: 0 auto 0 0;
+    width: 2px;
+    background: linear-gradient(
+        to bottom,
+        color-mix(in srgb, var(--tz-ch) 80%, transparent),
+        color-mix(in srgb, var(--tz-ch) 0%, transparent) 70%
+    );
+    border-radius: var(--lux-r-md, 6px) 0 0 var(--lux-r-md, 6px);
+    opacity: 0.75;
+    pointer-events: none;
+    transition: opacity 220ms var(--ease-out, ease-out);
+}
+
+.tz-picker-wrap .entity-select-trigger:hover {
+    border-color: color-mix(in srgb, var(--tz-ch) 55%, var(--lux-line-bold, var(--border-color)));
+    background: var(--lux-bg-2, var(--bg-secondary));
+    box-shadow: 0 0 0 1px color-mix(in srgb, var(--tz-ch) 18%, transparent),
+                0 8px 24px -10px color-mix(in srgb, var(--tz-ch) 30%, transparent);
+}
+
+.tz-picker-wrap .entity-select-trigger:hover::before {
+    opacity: 1;
+}
+
+.tz-picker-wrap .entity-select-trigger:focus-visible {
+    outline: none;
+    border-color: var(--tz-ch);
+    box-shadow: 0 0 0 2px color-mix(in srgb, var(--tz-ch) 25%, transparent);
+}
+
+.tz-picker-wrap .es-trigger-icon {
+    width: 28px;
+    height: 28px;
+    border-radius: var(--lux-r-sm, 3px);
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    background: color-mix(in srgb, var(--tz-ch) 12%, transparent);
+    border: var(--lux-hairline, 1px) solid color-mix(in srgb, var(--tz-ch) 25%, transparent);
+    color: var(--tz-ch);
+}
+
+.tz-picker-wrap .es-trigger-icon .icon {
+    width: 14px;
+    height: 14px;
+}
+
+.tz-picker-wrap .es-trigger-label {
+    font-weight: 600;
+    letter-spacing: 0.01em;
+    color: var(--lux-ink, var(--text-color));
+}
+
+/* Render the offset segment after the city in monospaced "panel-meter" type */
+.tz-picker-wrap .es-trigger-label {
+    /* Allow ellipsis to keep the trigger compact in narrow layouts. */
+    min-width: 0;
+}
+
+.tz-picker-wrap .es-trigger-arrow {
+    color: var(--lux-ink-mute, var(--text-secondary));
+    opacity: 0.7;
+    transform: translateY(-1px);
+    transition: transform 220ms var(--ease-out, ease-out), color 180ms ease;
+}
+
+.tz-picker-wrap:hover .es-trigger-arrow {
+    color: var(--tz-ch);
+    opacity: 1;
+    transform: translateY(0);
+}
+
+/* When the value is the system default (empty string), dim the label slightly
+   so users can see it is in the "no override" state at a glance. */
+.tz-picker-wrap .entity-select-trigger:has(.es-trigger-none) {
+    border-style: dashed;
+}
+
 /* ── Scroll-to-top button ── */
 
 .scroll-to-top {

server/src/ledgrab/static/js/app.ts

@@ -66,7 +66,7 @@ import {
 import {
     loadPictureSources, switchStreamTab,
     showAddTemplateModal, editTemplate, closeTemplateModal, saveTemplate, deleteTemplate,
-    showTestTemplateModal, closeTestTemplateModal, onEngineChange, runTemplateTest,
+    showTestTemplateModal, closeTestTemplateModal, onEngineChange, runTemplateTest, openTestDisplayPicker,
     showAddAudioTemplateModal, editAudioTemplate, closeAudioTemplateModal, saveAudioTemplate, deleteAudioTemplate,
     cloneAudioTemplate, onAudioEngineChange,
     showTestAudioTemplateModal, closeTestAudioTemplateModal, startAudioTemplateTest,
@@ -131,7 +131,6 @@ import {
 import {
     showCSSEditor, closeCSSEditorModal, forceCSSEditorClose, saveCSSEditor, deleteColorStrip,
     onCSSTypeChange, onEffectTypeChange, onEffectPaletteChange, onAnimationTypeChange, onCSSClockChange, onDaylightRealTimeChange,
-    colorCycleAddColor, colorCycleRemoveColor,
     compositeAddLayer, compositeRemoveLayer,
     mappedAddZone, mappedRemoveZone,
     onAudioVizChange,
@@ -224,6 +223,7 @@ import {
     openLogOverlay, closeLogOverlay,
     loadLogLevel, setLogLevel,
     loadShutdownAction, setShutdownAction,
+    loadDaylightTimezone, saveDaylightTimezone,
     requestNotifPermissionFromSettings, testNotifFromSettings,
     saveExternalUrl, revertExternalUrl, getBaseOrigin, loadExternalUrl,
 } from './features/settings.ts';
@@ -340,6 +340,7 @@ Object.assign(window, {
     closeTestTemplateModal,
     onEngineChange,
     runTemplateTest,
+    openTestDisplayPicker,
     updateCaptureDuration,
     showAddStreamModal,
     editStream,
@@ -488,8 +489,6 @@ Object.assign(window, {
     onCSSClockChange,
     onAnimationTypeChange,
     onDaylightRealTimeChange,
-    colorCycleAddColor,
-    colorCycleRemoveColor,
     compositeAddLayer,
     compositeRemoveLayer,
     mappedAddZone,
@@ -630,6 +629,8 @@ Object.assign(window, {
     setLogLevel,
     loadShutdownAction,
     setShutdownAction,
+    loadDaylightTimezone,
+    saveDaylightTimezone,
     requestNotifPermissionFromSettings,
     testNotifFromSettings,
     saveExternalUrl,

server/src/ledgrab/static/js/core/daylight-tz.ts

@@ -0,0 +1,255 @@
+/**
+ * Daylight-cycle timezone picker.
+ *
+ * Exposes:
+ *   - `getTimezoneItems()` — IconSelectItem[] for the EntityPalette / EntitySelect
+ *   - `enhanceTimezoneSelect(target, value, onChange?)` — replace a `<select>` with
+ *     a refined EntitySelect picker. Idempotent; safe to call on every modal open.
+ *   - `populateTimezoneSelect(id, value)` — back-compat for legacy callers that
+ *     still want a plain native `<select>`.
+ *
+ * Each entry exposes a friendly city name and the timezone's *current* UTC
+ * offset (computed via `Intl.DateTimeFormat`), so users see `Berlin · UTC+02:00`
+ * instead of bare IANA strings like `Europe/Berlin`.
+ */
+
+import { t } from './i18n.ts';
+import {
+    ICON_GLOBE,
+    ICON_SPARKLES,
+    ICON_TARGET_ICON,
+    ICON_CLOCK,
+} from './icons.ts';
+import type { IconSelectItem } from './icon-select.ts';
+import { EntitySelect } from './entity-palette.ts';
+
+type RegionKey =
+    | 'utc'
+    | 'europe'
+    | 'africa'
+    | 'me'
+    | 'asia'
+    | 'pacific'
+    | 'americas';
+
+interface TimezoneEntry {
+    iana: string;
+    region: RegionKey;
+    city: string;
+}
+
+const TIMEZONES: ReadonlyArray<TimezoneEntry> = [
+    { iana: 'UTC', region: 'utc', city: 'UTC' },
+
+    // Europe
+    { iana: 'Europe/London',    region: 'europe', city: 'London' },
+    { iana: 'Europe/Lisbon',    region: 'europe', city: 'Lisbon' },
+    { iana: 'Europe/Paris',     region: 'europe', city: 'Paris' },
+    { iana: 'Europe/Berlin',    region: 'europe', city: 'Berlin' },
+    { iana: 'Europe/Warsaw',    region: 'europe', city: 'Warsaw' },
+    { iana: 'Europe/Helsinki',  region: 'europe', city: 'Helsinki' },
+    { iana: 'Europe/Athens',    region: 'europe', city: 'Athens' },
+    { iana: 'Europe/Moscow',    region: 'europe', city: 'Moscow' },
+    { iana: 'Europe/Istanbul',  region: 'europe', city: 'Istanbul' },
+
+    // Africa & Middle East
+    { iana: 'Africa/Cairo',         region: 'africa', city: 'Cairo' },
+    { iana: 'Africa/Lagos',         region: 'africa', city: 'Lagos' },
+    { iana: 'Africa/Johannesburg',  region: 'africa', city: 'Johannesburg' },
+    { iana: 'Asia/Dubai',           region: 'me',     city: 'Dubai' },
+    { iana: 'Asia/Tehran',          region: 'me',     city: 'Tehran' },
+
+    // Asia
+    { iana: 'Asia/Karachi',     region: 'asia', city: 'Karachi' },
+    { iana: 'Asia/Kolkata',     region: 'asia', city: 'Kolkata' },
+    { iana: 'Asia/Bangkok',     region: 'asia', city: 'Bangkok' },
+    { iana: 'Asia/Jakarta',     region: 'asia', city: 'Jakarta' },
+    { iana: 'Asia/Singapore',   region: 'asia', city: 'Singapore' },
+    { iana: 'Asia/Hong_Kong',   region: 'asia', city: 'Hong Kong' },
+    { iana: 'Asia/Shanghai',    region: 'asia', city: 'Shanghai' },
+    { iana: 'Asia/Seoul',       region: 'asia', city: 'Seoul' },
+    { iana: 'Asia/Tokyo',       region: 'asia', city: 'Tokyo' },
+
+    // Pacific
+    { iana: 'Australia/Perth',      region: 'pacific', city: 'Perth' },
+    { iana: 'Australia/Adelaide',   region: 'pacific', city: 'Adelaide' },
+    { iana: 'Australia/Sydney',     region: 'pacific', city: 'Sydney' },
+    { iana: 'Pacific/Auckland',     region: 'pacific', city: 'Auckland' },
+    { iana: 'Pacific/Honolulu',     region: 'pacific', city: 'Honolulu' },
+
+    // Americas
+    { iana: 'America/Anchorage',                region: 'americas', city: 'Anchorage' },
+    { iana: 'America/Los_Angeles',              region: 'americas', city: 'Los Angeles' },
+    { iana: 'America/Denver',                   region: 'americas', city: 'Denver' },
+    { iana: 'America/Chicago',                  region: 'americas', city: 'Chicago' },
+    { iana: 'America/Mexico_City',              region: 'americas', city: 'Mexico City' },
+    { iana: 'America/New_York',                 region: 'americas', city: 'New York' },
+    { iana: 'America/Toronto',                  region: 'americas', city: 'Toronto' },
+    { iana: 'America/Sao_Paulo',                region: 'americas', city: 'São Paulo' },
+    { iana: 'America/Argentina/Buenos_Aires',   region: 'americas', city: 'Buenos Aires' },
+];
+
+const REGION_FALLBACK: Record<RegionKey, string> = {
+    utc:      'UTC',
+    europe:   'Europe',
+    africa:   'Africa',
+    me:       'Middle East',
+    asia:     'Asia',
+    pacific:  'Pacific',
+    americas: 'Americas',
+};
+
+function _detectedTimezone(): string {
+    try {
+        return Intl.DateTimeFormat().resolvedOptions().timeZone || '';
+    } catch {
+        return '';
+    }
+}
+
+/** Compute the current UTC offset for a given IANA zone, formatted as `UTC+02:00`. */
+function _utcOffsetLabel(iana: string): string {
+    try {
+        const fmt = new Intl.DateTimeFormat('en-US', {
+            timeZone: iana,
+            timeZoneName: 'longOffset',
+        });
+        const parts = fmt.formatToParts(new Date());
+        const raw = parts.find(p => p.type === 'timeZoneName')?.value || '';
+        // Intl returns 'GMT+02:00' for offsets and 'GMT' for UTC. Normalize.
+        if (raw === 'GMT' || raw === '') return 'UTC';
+        return raw.replace(/^GMT/, 'UTC');
+    } catch {
+        return '';
+    }
+}
+
+function _friendlyCityFromIana(iana: string): string {
+    const last = iana.split('/').pop() || iana;
+    return last.replace(/_/g, ' ');
+}
+
+function _regionLabel(region: RegionKey): string {
+    return t(`common.daylight_tz.region.${region}`) || REGION_FALLBACK[region];
+}
+
+function _formatRowLabel(city: string, offset: string): string {
+    // Em-dash separator, monospaced offset rendered via CSS on the popup.
+    return offset ? `${city} · ${offset}` : city;
+}
+
+/** Build the list of items for an EntitySelect timezone picker. */
+export function getTimezoneItems(): IconSelectItem[] {
+    const items: IconSelectItem[] = [];
+    const detected = _detectedTimezone();
+
+    items.push({
+        value: '',
+        icon: ICON_TARGET_ICON,
+        label: t('common.daylight_tz.system') || 'System default',
+        desc: t('common.daylight_tz.system_desc') || 'Server clock',
+    });
+
+    if (detected) {
+        const offset = _utcOffsetLabel(detected);
+        const city = _friendlyCityFromIana(detected);
+        const detectedLabel = t('common.daylight_tz.detected_label') || 'Auto-detected';
+        items.push({
+            value: detected,
+            icon: ICON_SPARKLES,
+            label: _formatRowLabel(city, offset),
+            desc: `${detectedLabel} · ${detected}`,
+        });
+    }
+
+    for (const tz of TIMEZONES) {
+        if (detected && tz.iana === detected) continue;
+        const offset = _utcOffsetLabel(tz.iana);
+        const region = _regionLabel(tz.region);
+        items.push({
+            value: tz.iana,
+            icon: tz.region === 'utc' ? ICON_CLOCK : ICON_GLOBE,
+            label: _formatRowLabel(tz.city, offset),
+            desc: `${region} · ${tz.iana}`,
+        });
+    }
+    return items;
+}
+
+/**
+ * Populate a `<select>` with timezone options. Kept for back-compat; the new
+ * preferred entrypoint is `enhanceTimezoneSelect()`.
+ */
+export function populateTimezoneSelect(selectId: string, currentValue: string): void {
+    const select = document.getElementById(selectId) as HTMLSelectElement | null;
+    if (!select) return;
+    _syncNativeOptions(select, currentValue);
+}
+
+function _syncNativeOptions(select: HTMLSelectElement, currentValue: string): void {
+    const items = getTimezoneItems();
+    const seen = new Set<string>();
+    const fragments: string[] = [];
+    for (const item of items) {
+        if (seen.has(item.value)) continue;
+        seen.add(item.value);
+        const text = item.desc ? `${item.label} — ${item.desc}` : item.label;
+        fragments.push(`<option value="${_escapeAttr(item.value)}">${_escapeText(text)}</option>`);
+    }
+    if (currentValue && !seen.has(currentValue)) {
+        fragments.unshift(
+            `<option value="${_escapeAttr(currentValue)}">${_escapeText(currentValue)}</option>`,
+        );
+    }
+    select.innerHTML = fragments.join('');
+    select.value = currentValue || '';
+}
+
+function _escapeAttr(s: string): string {
+    return s.replace(/[&<>"']/g, c =>
+        c === '&' ? '&amp;'
+        : c === '<' ? '&lt;'
+        : c === '>' ? '&gt;'
+        : c === '"' ? '&quot;'
+        : '&#39;',
+    );
+}
+function _escapeText(s: string): string {
+    return _escapeAttr(s);
+}
+
+const _enhanced = new WeakMap<HTMLSelectElement, EntitySelect>();
+
+/**
+ * Replace a native `<select>` with the refined timezone EntitySelect picker.
+ * Idempotent — calling on the same element again refreshes items and value.
+ */
+export function enhanceTimezoneSelect(
+    target: HTMLSelectElement,
+    currentValue: string,
+    onChange?: (value: string) => void,
+): EntitySelect {
+    _syncNativeOptions(target, currentValue);
+
+    const existing = _enhanced.get(target);
+    if (existing) {
+        existing.refresh();
+        existing.setValue(currentValue || '');
+        return existing;
+    }
+
+    const trigger = target.parentElement?.classList.contains('tz-picker-wrap');
+    if (trigger) {
+        // Hint for stylesheet: distinguish the timezone trigger from generic ones.
+        target.parentElement!.dataset.tzPicker = '';
+    }
+
+    const es = new EntitySelect({
+        target,
+        getItems: getTimezoneItems,
+        placeholder: t('common.daylight_tz.search') || 'Search timezones…',
+        onChange,
+    });
+    _enhanced.set(target, es);
+    return es;
+}

server/src/ledgrab/static/js/core/graph-nodes.ts

@@ -92,7 +92,7 @@ const KIND_ICONS = {
 // ── Subtype-specific icon overrides ──
 const SUBTYPE_ICONS = {
     color_strip_source: {
-        picture_advanced: P.monitor, static: P.palette, color_cycle: P.refreshCw,
+        picture_advanced: P.monitor, static: P.palette,
         gradient: P.rainbow, effect: P.zap, composite: P.link,
         mapped: P.mapPin, mapped_zones: P.mapPin,
         audio: P.music, audio_visualization: P.music,

server/src/ledgrab/static/js/core/icon-paths.ts

@@ -124,3 +124,13 @@ export const chevronDown  = '<path d="m6 9 6 6 6-6"/>';
 export const plus         = '<path d="M5 12h14"/><path d="M12 5v14"/>';
 // Lucide: git-merge (sequence mode icon)
 export const gitMerge     = '<circle cx="18" cy="18" r="3"/><circle cx="6" cy="6" r="3"/><path d="M6 21V9a9 9 0 0 0 9 9"/>';
+
+// Easing curve glyphs — custom mini-charts that draw the actual curve.
+// Curve travels from (4, 20) to (20, 4); each path renders the easing
+// function directly so the picker shows the shape, not a metaphor.
+export const easingLinear  = '<path d="M4 20 20 4"/>';
+export const easingStep    = '<path d="M4 20h8v-8h8V4"/>';
+export const easingIn      = '<path d="M4 20C13 20 16 18 20 4"/>';
+export const easingOut     = '<path d="M4 20C8 6 11 4 20 4"/>';
+export const easingInOut   = '<path d="M4 20C12 20 12 4 20 4"/>';
+export const easingSine    = '<path d="M4 12C7 12 8 4 12 4S17 12 20 12"/>';

server/src/ledgrab/static/js/core/icons.ts

@@ -18,7 +18,7 @@ const _targetTypeIcons        = { led: _svg(P.lightbulb), wled: _svg(P.lightbulb
 const _pictureSourceTypeIcons = { raw: _svg(P.monitor), processed: _svg(P.palette), static_image: _svg(P.image), video: _svg(P.film) };
 const _colorStripTypeIcons    = {
     picture_advanced: _svg(P.monitor),
-    static: _svg(P.palette), color_cycle: _svg(P.refreshCw), gradient: _svg(P.rainbow),
+    static: _svg(P.palette), gradient: _svg(P.rainbow),
     effect: _svg(P.zap), composite: _svg(P.link),
     mapped: _svg(P.mapPin), mapped_zones: _svg(P.mapPin),
     audio: _svg(P.music), audio_visualization: _svg(P.music),

server/src/ledgrab/static/js/core/modal.ts

@@ -36,11 +36,14 @@ export class Modal {
 
     open() {
         this._previousFocus = document.activeElement;
-        // Cancel any in-flight close animation so the modal becomes interactive again.
+        // If a close animation is in flight, we still own the body lock — it
+        // gets released in finalize(). Skip the lockBody() call in that case
+        // so the lock count stays balanced.
+        const hadInFlightClose = this._exitCleanup !== null;
         this.el!.classList.remove('closing');
         this._cancelExitAnim();
         this.el!.style.display = 'flex';
-        if (this._lock) lockBody();
+        if (this._lock && !hadInFlightClose) lockBody();
         if (this._backdrop) setupBackdropClose(this.el!, () => this.close());
         trapFocus(this.el!);
         Modal._stack = Modal._stack.filter(m => m !== this);
@@ -72,12 +75,14 @@ export class Modal {
         if (this.el.classList.contains('closing')) return;
 
         // Modal-state cleanup happens immediately so subsequent code that
-        // queries Modal._stack / focus / body-lock sees a "closed" state.
+        // queries Modal._stack / focus sees a "closed" state. Body-lock
+        // release AND subclass cleanup (onForceClose) are deferred to
+        // finalize() — running them now would toggle html.modal-open or
+        // mutate DOM (widget destruction clears innerHTML) before the exit
+        // animation, causing a visible layout shift inside the modal.
         releaseFocus(this.el);
-        if (this._lock) unlockBody();
         this._initialValues = {};
         this.hideError();
-        this.onForceClose();
         Modal._stack = Modal._stack.filter(m => m !== this);
         if (this._previousFocus && typeof (this._previousFocus as HTMLElement).focus === 'function') {
             (this._previousFocus as HTMLElement).focus({ preventScroll: true });
@@ -95,10 +100,13 @@ export class Modal {
         const finalize = () => {
             this._exitCleanup = null;
             // Guard against re-open: if open() was called during animation,
-            // the .closing class is gone and display is already 'flex'.
+            // the .closing class is gone and display is already 'flex' — the
+            // body lock is still held by the re-opened modal, so don't release.
             if (!el.classList.contains('closing')) return;
             el.classList.remove('closing');
             el.style.display = 'none';
+            this.onForceClose();
+            if (this._lock) unlockBody();
         };
 
         let timer: number | null = null;
@@ -110,6 +118,9 @@ export class Modal {
         this._exitCleanup = () => {
             if (timer !== null) { clearTimeout(timer); timer = null; }
             content?.removeEventListener('animationend', onEnd);
+            // Re-open during animation: still run subclass cleanup so the
+            // fresh open re-initializes from a clean slate (widgets etc.).
+            this.onForceClose();
         };
 
         el.classList.add('closing');
@@ -156,7 +167,12 @@ export class Modal {
         if (this.errorEl) this.errorEl.style.display = 'none';
     }
 
-    /** Hook for subclass cleanup on force-close (canvas, observers, etc.). */
+    /**
+     * Hook for subclass cleanup on force-close (canvas, observers, widget
+     * .destroy() calls, etc.). Runs AFTER the exit animation completes (or
+     * when an in-flight close is canceled by reopen), so DOM mutations
+     * here do not cause a layout shift visible during the animation.
+     */
     onForceClose() {}
 
     $(id: string) {

server/src/ledgrab/static/js/core/state.ts

@@ -290,6 +290,12 @@ export const captureTemplatesCache = new DataCache<CaptureTemplate[]>({
 });
 captureTemplatesCache.subscribe(v => { _cachedCaptureTemplates = v; });
 
+export const enginesCache = new DataCache<EngineInfo[]>({
+    endpoint: '/capture-engines',
+    extractData: json => json.engines || [],
+});
+enginesCache.subscribe(v => { availableEngines = v; });
+
 export const audioSourcesCache = new DataCache<AudioSource[]>({
     endpoint: '/audio-sources',
     extractData: json => json.sources || [],

server/src/ledgrab/static/js/features/color-strips/cards.ts

@@ -47,7 +47,7 @@ function _gradientEntityStripHTML(stops: Array<{ position: number; color: number
 /* ── Non-picture types set ────────────────────────────────────── */
 
 const NON_PICTURE_TYPES = new Set([
-    'static', 'gradient', 'color_cycle', 'effect', 'composite', 'mapped',
+    'static', 'gradient', 'effect', 'composite', 'mapped',
     'audio', 'api_input', 'notification', 'daylight', 'candlelight', 'weather', 'processed', 'key_colors',
     'math_wave',
 ]);
@@ -65,16 +65,6 @@ const CSS_CARD_RENDERERS: Record<string, CardPropsRenderer> = {
             ${clockBadge}
         `;
     },
-    color_cycle: (source, { clockBadge }) => {
-        const colors = source.colors || [];
-        const swatches = colors.slice(0, 8).map((c: any) =>
-            `<span style="display:inline-block;width:12px;height:12px;background:${rgbArrayToHex(c)};border:1px solid #888;border-radius:2px;margin-right:2px"></span>`
-        ).join('');
-        return `
-            <span class="stream-card-prop">${swatches}</span>
-            ${clockBadge}
-        `;
-    },
     gradient: (source, { clockBadge, animBadge }) => {
         const stops = source.stops || [];
         const sortedStops = [...stops].sort((a, b) => a.position - b.position);
@@ -277,7 +267,6 @@ function _renderPictureCardProps(source: ColorStripSource, pictureSourceMap: Rec
 const STRIP_BADGE: Record<string, string> = {
     static: 'STRIP · COLOR',
     gradient: 'STRIP · GRD',
-    color_cycle: 'STRIP · CYCLE',
     effect: 'STRIP · FX',
     composite: 'STRIP · COMP',
     mapped: 'STRIP · MAP',

server/src/ledgrab/static/js/features/color-strips/color-cycle.ts

@@ -1,68 +0,0 @@
-/**
- * Color Strip Sources — Color Cycle helpers.
- * Extracted from color-strips.ts to reduce file size.
- */
-
-import { ICON_TRASH } from '../../core/icons.ts';
-import { rgbArrayToHex, hexToRgbArray } from '../css-gradient-editor.ts';
-
-/* ── State ────────────────────────────────────────────────────── */
-
-const _DEFAULT_CYCLE_COLORS = ['#ff0000', '#ffff00', '#00ff00', '#00ffff', '#0000ff', '#ff00ff'];
-let _colorCycleColors = [..._DEFAULT_CYCLE_COLORS];
-
-/* ── DOM sync ─────────────────────────────────────────────────── */
-
-function _syncColorCycleFromDom() {
-    const inputs = document.querySelectorAll<HTMLInputElement>('#color-cycle-colors-list input[type=color]');
-    if (inputs.length > 0) {
-        _colorCycleColors = Array.from(inputs).map(el => el.value);
-    }
-}
-
-/* ── Rendering ────────────────────────────────────────────────── */
-
-function _colorCycleRenderList() {
-    const list = document.getElementById('color-cycle-colors-list') as HTMLElement | null;
-    if (!list) return;
-    const canRemove = _colorCycleColors.length > 2;
-    list.innerHTML = _colorCycleColors.map((hex, i) => `
-        <div class="color-cycle-item">
-            <input type="color" value="${hex}">
-            ${canRemove
-                ? `<button type="button" class="btn btn-secondary color-cycle-remove-btn"
-                           onclick="colorCycleRemoveColor(${i})">${ICON_TRASH}</button>`
-                : `<div style="height:14px"></div>`}
-        </div>
-    `).join('') + `<div class="color-cycle-item"><button type="button" class="btn btn-secondary color-cycle-add-btn" onclick="colorCycleAddColor()">+</button></div>`;
-}
-
-/* ── Public actions ───────────────────────────────────────────── */
-
-export function colorCycleAddColor() {
-    _syncColorCycleFromDom();
-    _colorCycleColors.push('#ffffff');
-    _colorCycleRenderList();
-}
-
-export function colorCycleRemoveColor(i: number) {
-    _syncColorCycleFromDom();
-    if (_colorCycleColors.length <= 2) return;
-    _colorCycleColors.splice(i, 1);
-    _colorCycleRenderList();
-}
-
-export function colorCycleGetColors() {
-    const inputs = document.querySelectorAll<HTMLInputElement>('#color-cycle-colors-list input[type=color]');
-    return Array.from(inputs).map(el => hexToRgbArray(el.value));
-}
-
-/* ── Load / Reset ─────────────────────────────────────────────── */
-
-export function loadColorCycleState(css: any) {
-    const raw = css && css.colors;
-    _colorCycleColors = (raw && raw.length >= 2)
-        ? raw.map((c: any) => rgbArrayToHex(c))
-        : [..._DEFAULT_CYCLE_COLORS];
-    _colorCycleRenderList();
-}

server/src/ledgrab/static/js/features/color-strips/index.ts

@@ -1,6 +1,6 @@
 /**
  * Color Strip Sources — CRUD, editor orchestration, type switching.
- * Sub-modules handle type-specific logic: audio, cards, color-cycle, composite,
+ * Sub-modules handle type-specific logic: audio, cards, composite,
  * game-event, gradient, mapped, math-wave, notification, test.
  */
 
@@ -62,9 +62,6 @@ import {
     mappedSetAvailableSources, mappedRenderList, mappedAddZone, mappedRemoveZone,
     mappedGetZones, loadMappedState, resetMappedState, getMappedZones,
 } from './mapped.ts';
-import {
-    colorCycleAddColor, colorCycleRemoveColor, colorCycleGetColors, loadColorCycleState,
-} from './color-cycle.ts';
 import {
     destroyAudioWidgets, ensureAudioSensitivityWidget, ensureAudioSmoothingWidget,
     ensureAudioBeatDecayWidget, ensureAudioColorWidget, ensureAudioColorPeakWidget,
@@ -90,11 +87,10 @@ export {
     notificationAddAppOverride, notificationRemoveAppOverride,
     testNotification, showNotificationHistory, closeNotificationHistory, refreshNotificationHistory,
 };
-export { _getAnimationPayload, colorCycleGetColors as _colorCycleGetColors };
+export { _getAnimationPayload };
 export { addCSSGameMapping, removeCSSGameMapping, onCSSGameMappingPresetChange };
 export { mathWaveAddLayer, mathWaveRemoveLayer };
 export { mappedAddZone, mappedRemoveZone };
-export { colorCycleAddColor, colorCycleRemoveColor };
 export { createColorStripCard };
 export {
     onGradientPresetChange, promptAndSaveGradientPreset, deleteAndRefreshGradientPreset,
@@ -158,7 +154,6 @@ class CSSEditorModal extends Modal {
             led_count: (document.getElementById('css-editor-led-count') as HTMLInputElement).value,
             gradient_stops: type === 'gradient' ? JSON.stringify(getGradientStops()) : '[]',
             animation_type: (document.getElementById('css-editor-animation-type') as HTMLInputElement).value,
-            cycle_colors: JSON.stringify(colorCycleGetColors()),
             effect_type: (document.getElementById('css-editor-effect-type') as HTMLInputElement).value,
             effect_palette: (document.getElementById('css-editor-effect-palette') as HTMLInputElement).value,
             effect_color: _effectColorWidget ? JSON.stringify(_effectColorWidget.getValue()) : '[]',
@@ -190,6 +185,7 @@ class CSSEditorModal extends Modal {
             daylight_speed: (document.getElementById('css-editor-daylight-speed') as HTMLInputElement).value,
             daylight_use_real_time: (document.getElementById('css-editor-daylight-real-time') as HTMLInputElement).checked,
             daylight_latitude: (document.getElementById('css-editor-daylight-latitude') as HTMLInputElement).value,
+            daylight_longitude: (document.getElementById('css-editor-daylight-longitude') as HTMLInputElement).value,
             candlelight_color: _candlelightColorWidget ? JSON.stringify(_candlelightColorWidget.getValue()) : '[]',
             candlelight_intensity: _candlelightIntensityWidget ? JSON.stringify(_candlelightIntensityWidget.getValue()) : '1.0',
             candlelight_num_candles: (document.getElementById('css-editor-candlelight-num-candles') as HTMLInputElement).value,
@@ -307,7 +303,7 @@ async function configureKCRegions(sourceId: string): Promise<void> {
 // ══════════════════════════════════════════════════════════════════
 
 const CSS_TYPE_KEYS = [
-    'picture', 'picture_advanced', 'static', 'gradient', 'color_cycle',
+    'picture', 'picture_advanced', 'static', 'gradient',
     'effect', 'composite', 'mapped', 'audio',
     'api_input', 'notification', 'daylight', 'candlelight', 'weather', 'processed', 'key_colors',
     'game_event', 'math_wave',
@@ -346,7 +342,6 @@ const CSS_SECTION_MAP: Record<string, string> = {
     'picture': 'css-editor-picture-section',
     'picture_advanced': 'css-editor-picture-section',
     'static': 'css-editor-static-section',
-    'color_cycle': 'css-editor-color-cycle-section',
     'gradient': 'css-editor-gradient-section',
     'effect': 'css-editor-effect-section',
     'composite': 'css-editor-composite-section',
@@ -422,7 +417,7 @@ export function onCSSTypeChange() {
     (document.getElementById('css-editor-led-count-group') as HTMLElement).style.display =
         hasLedCount.includes(type) ? '' : 'none';
 
-    const clockTypes = ['static', 'gradient', 'color_cycle', 'effect', 'daylight', 'candlelight', 'weather', 'math_wave'];
+    const clockTypes = ['static', 'gradient', 'effect', 'daylight', 'candlelight', 'weather', 'math_wave'];
     (document.getElementById('css-editor-clock-group') as HTMLElement).style.display = clockTypes.includes(type) ? '' : 'none';
     if (clockTypes.includes(type)) _populateClockDropdown();
 
@@ -1006,15 +1001,6 @@ const _typeHandlers: Record<string, { load: (...args: any[]) => any; reset: (...
             return { name, color: _ensureStaticColorWidget().getValue(), animation: _getAnimationPayload() };
         },
     },
-    color_cycle: {
-        load(css) { loadColorCycleState(css); },
-        reset() { loadColorCycleState(null); },
-        getPayload(name) {
-            const cycleColors = colorCycleGetColors();
-            if (cycleColors.length < 2) { cssEditorModal.showError(t('color_strip.color_cycle.min_colors')); return null; }
-            return { name, colors: cycleColors };
-        },
-    },
     gradient: {
         load(css) {
             const gradientId = css.gradient_id || '';
@@ -1180,6 +1166,7 @@ const _typeHandlers: Record<string, { load: (...args: any[]) => any; reset: (...
             (document.getElementById('css-editor-daylight-latitude-val') as HTMLElement).textContent = '50';
             (document.getElementById('css-editor-daylight-longitude') as HTMLInputElement).value = 0.0 as any;
             (document.getElementById('css-editor-daylight-longitude-val') as HTMLElement).textContent = '0';
+            _syncDaylightSpeedVisibility();
         },
         getPayload(name) {
             return {
@@ -1563,7 +1550,7 @@ export async function saveCSSEditor() {
 
     payload.source_type = knownType ? sourceType : 'picture';
 
-    const clockTypes = ['static', 'gradient', 'color_cycle', 'effect', 'daylight', 'candlelight', 'weather', 'math_wave'];
+    const clockTypes = ['static', 'gradient', 'effect', 'daylight', 'candlelight', 'weather', 'math_wave'];
     if (clockTypes.includes(sourceType)) {
         payload.clock_id = (document.getElementById('css-editor-clock') as HTMLInputElement).value || null;
     }

server/src/ledgrab/static/js/features/color-strips/test.ts

@@ -15,14 +15,14 @@ import {
 } from '../../core/icons.ts';
 import { EntitySelect } from '../../core/entity-palette.ts';
 import { hexToRgbArray, getGradientStops } from '../css-gradient-editor.ts';
-import { testNotification, _getAnimationPayload, _colorCycleGetColors } from './index.ts';
+import { testNotification, _getAnimationPayload } from './index.ts';
 import { notificationGetAppColorsDict, notificationGetAppSoundsDict, getNotificationDurationValue, getNotificationVolumeValue } from './notification.ts';
 import { openAuthedWs } from '../../core/ws-auth.ts';
 
 /* ── Preview config builder ───────────────────────────────────── */
 
 const _PREVIEW_TYPES = new Set([
-    'static', 'gradient', 'color_cycle', 'effect', 'daylight', 'candlelight', 'notification',
+    'static', 'gradient', 'effect', 'daylight', 'candlelight', 'notification',
 ]);
 
 function _collectPreviewConfig() {
@@ -35,10 +35,6 @@ function _collectPreviewConfig() {
         const stops = getGradientStops();
         if (stops.length < 2) return null;
         config = { source_type: 'gradient', stops: stops.map(s => ({ position: s.position, color: s.color, ...(s.colorRight ? { color_right: s.colorRight } : {}) })), animation: _getAnimationPayload(), easing: (document.getElementById('css-editor-gradient-easing') as HTMLSelectElement).value };
-    } else if (sourceType === 'color_cycle') {
-        const colors = _colorCycleGetColors();
-        if (colors.length < 2) return null;
-        config = { source_type: 'color_cycle', colors };
     } else if (sourceType === 'effect') {
         config = { source_type: 'effect', effect_type: (document.getElementById('css-editor-effect-type') as HTMLInputElement).value, gradient_id: (document.getElementById('css-editor-effect-palette') as HTMLInputElement).value, intensity: parseFloat((document.getElementById('css-editor-effect-intensity') as HTMLInputElement).value), scale: parseFloat((document.getElementById('css-editor-effect-scale') as HTMLInputElement).value), mirror: (document.getElementById('css-editor-effect-mirror') as HTMLInputElement).checked };
         if (['meteor', 'comet', 'bouncing_ball'].includes(config.effect_type)) { const hex = (document.getElementById('css-editor-effect-color') as HTMLInputElement).value; config.color = [parseInt(hex.slice(1, 3), 16), parseInt(hex.slice(3, 5), 16), parseInt(hex.slice(5, 7), 16)]; }

server/src/ledgrab/static/js/features/dashboard.ts

@@ -323,9 +323,11 @@ function _renderIntegrationCard(conn: HomeAssistantConnectionStatus): string {
         ? `${t('ha_source.connected')} — ${conn.entity_count} ${t('dashboard.integrations.entities')}`
         : t('ha_source.disconnected');
     const statusDot = `<span class="health-dot ${healthClass}" title="${escapeHtml(healthTitle)}" role="status"></span>`;
+    const host = (conn.host || '').trim();
+    const entitiesPart = `${conn.entity_count} ${t('dashboard.integrations.entities')}`;
     const subtitle = conn.connected
-        ? `${conn.entity_count} ${t('dashboard.integrations.entities')}`
-        : t('ha_source.disconnected');
+        ? (host ? `${host} · ${entitiesPart}` : entitiesPart)
+        : (host ? `${host} · ${t('ha_source.disconnected')}` : t('ha_source.disconnected'));
     const short = (conn.source_id || '').replace(/^src_/, '').slice(0, 2).toUpperCase() || 'HA';
     const ledCls = conn.connected ? 'led on blink' : 'led';
     const patchLabel = conn.connected ? 'ONLINE' : 'OFFLINE';
@@ -403,9 +405,11 @@ function _updateIntegrationsInPlace(haStatus: HomeAssistantStatusResponse, mqttS
         }
         const meta = card.querySelector('.mod-meta');
         if (meta) {
+            const host = (conn.host || '').trim();
+            const entitiesPart = `${conn.entity_count} ${t('dashboard.integrations.entities')}`;
             meta.textContent = conn.connected
-                ? `${conn.entity_count} ${t('dashboard.integrations.entities')}`
-                : t('ha_source.disconnected');
+                ? (host ? `${host} · ${entitiesPart}` : entitiesPart)
+                : (host ? `${host} · ${t('ha_source.disconnected')}` : t('ha_source.disconnected'));
         }
         applyState(card, conn.connected, conn.connected ? 'ONLINE' : 'OFFLINE');
     }

server/src/ledgrab/static/js/features/displays.ts

@@ -25,24 +25,53 @@ export function openDisplayPicker(callback: (index: number, display?: Display |
     set_displayPickerSelectedIndex((selectedIndex !== undefined && selectedIndex !== null && selectedIndex !== '') ? Number(selectedIndex) : null);
     _pickerEngineType = engineType || null;
     const lightbox = document.getElementById('display-picker-lightbox')!;
+    const canvas = document.getElementById('display-picker-canvas')!;
 
-    // Use "Select a Device" title for engines with own display lists (camera, scrcpy, etc.)
-    const titleEl = lightbox.querySelector('.display-picker-title');
-    if (titleEl) {
-        titleEl.textContent = t(_pickerEngineType ? 'displays.picker.title.device' : 'displays.picker.title');
+    // Device-picker variants (camera, scrcpy) drop the big "Select Display"
+    // title — the eyebrow channel strip already reads "Device · List", so
+    // a redundant title rack just steals vertical space. The title only
+    // renders in monitor-pick mode.
+    const isDevicePicker = !!_pickerEngineType;
+    const content = lightbox.querySelector('.display-picker-content');
+    content?.classList.toggle('display-picker-content--no-title', isDevicePicker);
+
+    const setI18n = (selector: string, key: string) => {
+        const el = lightbox.querySelector(selector);
+        if (!el) return;
+        el.setAttribute('data-i18n', key);
+        el.textContent = t(key);
+    };
+    if (!isDevicePicker) {
+        setI18n('.display-picker-title [data-role="lead"]', 'displays.picker.title.lead');
+        setI18n('.display-picker-title__accent', 'displays.picker.title.accent');
+    }
+    setI18n('.display-picker-eyebrow [data-role="label"]', 'displays.picker.eyebrow.label');
+    setI18n(
+        '.display-picker-eyebrow__channel',
+        isDevicePicker ? 'displays.picker.eyebrow.channel.device' : 'displays.picker.eyebrow.channel',
+    );
+    setI18n(
+        '.display-picker-foot [data-role="select"]',
+        isDevicePicker ? 'displays.picker.foot.select.device' : 'displays.picker.foot.select',
+    );
+
+    // Render synchronously *before* activating the modal so the first frame
+    // shows final content (or a spinner) instead of stale layout from the
+    // previous open.
+    if (_pickerEngineType) {
+        canvas.innerHTML = '<div class="loading-spinner"></div>';
+    } else if (_cachedDisplays && _cachedDisplays.length > 0) {
+        renderDisplayPickerLayout(_cachedDisplays);
+    } else {
+        canvas.innerHTML = '<div class="loading-spinner"></div>';
     }
 
     lightbox.classList.add('active');
 
-    requestAnimationFrame(() => {
-        // Always fetch fresh when engine type is specified (different list each time)
+    // Kick off async fetches after activation; spinner is already in place.
     if (_pickerEngineType) {
         _fetchAndRenderEngineDisplays(_pickerEngineType);
-        } else if (_cachedDisplays && _cachedDisplays.length > 0) {
-            renderDisplayPickerLayout(_cachedDisplays);
-        } else {
-            const canvas = document.getElementById('display-picker-canvas')!;
-            canvas.innerHTML = '<div class="loading-spinner"></div>';
+    } else if (!_cachedDisplays || _cachedDisplays.length === 0) {
         displaysCache.fetch().then(displays => {
             if (displays && displays.length > 0) {
                 renderDisplayPickerLayout(displays);
@@ -51,7 +80,6 @@ export function openDisplayPicker(callback: (index: number, display?: Display |
             }
         });
     }
-    });
 }
 
 async function _fetchAndRenderEngineDisplays(engineType: string): Promise<void> {

server/src/ledgrab/static/js/features/settings.ts

@@ -525,6 +525,7 @@ export function openSettingsModal(): void {
     loadBackupList();
     loadLogLevel();
     loadShutdownAction();
+    loadDaylightTimezone();
     _seedRailFooter();
     // Refresh the update status so the rail badge ("update available" pill
     // on the Updates tab) is current when the modal opens — it would
@@ -975,6 +976,45 @@ export async function setShutdownAction(): Promise<void> {
     }
 }
 
+// ─── Daylight timezone (global) ───────────────────────────────
+
+export async function loadDaylightTimezone(): Promise<void> {
+    const select = document.getElementById('settings-daylight-timezone') as HTMLSelectElement | null;
+    if (!select) return;
+    let current = '';
+    try {
+        const resp = await fetchWithAuth('/preferences/daylight-timezone');
+        if (resp.ok) {
+            const data = await resp.json();
+            current = typeof data?.timezone === 'string' ? data.timezone : '';
+        }
+    } catch (err) {
+        console.error('Failed to load daylight timezone:', err);
+    }
+    const { enhanceTimezoneSelect } = await import('../core/daylight-tz.ts');
+    enhanceTimezoneSelect(select, current, () => { saveDaylightTimezone(); });
+}
+
+export async function saveDaylightTimezone(): Promise<void> {
+    const select = document.getElementById('settings-daylight-timezone') as HTMLSelectElement | null;
+    if (!select) return;
+    const tz = select.value;
+    try {
+        const resp = await fetchWithAuth('/preferences/daylight-timezone', {
+            method: 'PUT',
+            body: JSON.stringify({ timezone: tz }),
+        });
+        if (!resp.ok) {
+            const err = await resp.json().catch(() => ({}));
+            throw new Error(err.detail || `HTTP ${resp.status}`);
+        }
+        showToast(t('settings.daylight_timezone.saved'), 'success');
+    } catch (err) {
+        console.error('Failed to save daylight timezone:', err);
+        showToast(t('settings.daylight_timezone.save_error') + ': ' + err.message, 'error');
+    }
+}
+
 // ─── Notifications tab ────────────────────────────────────────
 
 const _NOTIF_EVENT_KEYS = [

server/src/ledgrab/static/js/features/streams-capture-templates.ts

@@ -4,12 +4,12 @@
  */
 
 import {
-    availableEngines, setAvailableEngines,
+    availableEngines,
     currentEditingTemplateId, setCurrentEditingTemplateId,
     _templateNameManuallyEdited, set_templateNameManuallyEdited,
     currentTestingTemplate, setCurrentTestingTemplate,
     _cachedStreams, _cachedDisplays,
-    captureTemplatesCache, displaysCache,
+    captureTemplatesCache, displaysCache, enginesCache,
     apiKey,
 } from '../core/state.ts';
 import { API_BASE, getHeaders, fetchWithAuth, escapeHtml } from '../core/api.ts';
@@ -168,6 +168,7 @@ export async function showTestTemplateModal(templateId: any) {
         }
 
         setCurrentTestingTemplate(template);
+        await enginesCache.fetch();
         await loadDisplaysForTest();
         restoreCaptureDuration();
 
@@ -186,10 +187,7 @@ export function closeTestTemplateModal() {
 
 async function loadAvailableEngines() {
     try {
-        const response = await fetchWithAuth('/capture-engines');
-        if (!response.ok) throw new Error(`Failed to load engines: ${response.status}`);
-        const data = await response.json();
-        setAvailableEngines(data.engines || []);
+        await enginesCache.fetch();
 
         const select = document.getElementById('template-engine') as HTMLSelectElement;
         select.innerHTML = '';
@@ -224,6 +222,7 @@ async function loadAvailableEngines() {
 }
 
 let _engineIconSelect: IconSelect | null = null;
+const _configIconSelects: Map<string, IconSelect> = new Map();
 
 export async function onEngineChange() {
     const engineType = (document.getElementById('template-engine') as HTMLSelectElement).value;
@@ -249,16 +248,16 @@ export async function onEngineChange() {
         hint.style.display = 'none';
     }
 
+    for (const inst of _configIconSelects.values()) inst.destroy();
+    _configIconSelects.clear();
     configFields.innerHTML = '';
     const defaultConfig = engine.default_config || {};
+    const configChoices: Record<string, string[]> = engine.config_choices || {};
 
-    // Known select options for specific config keys
-    const CONFIG_SELECT_OPTIONS = {
-        camera_backend: ['auto', 'dshow', 'msmf', 'v4l2'],
-    };
-
-    // IconSelect definitions for specific config keys
-    const CONFIG_ICON_SELECT = {
+    // Full catalogue of icon-select renderings for known enum-like config keys.
+    // The actual list of options shown is intersected with engine.config_choices
+    // so platform-specific values (e.g. v4l2 on Windows) are hidden by the server.
+    const CONFIG_ICON_SELECT_CATALOGUE: Record<string, { columns: number; items: { value: string; icon: string; label: string; desc: string }[] }> = {
         camera_backend: {
             columns: 2,
             items: [
@@ -268,8 +267,31 @@ export async function onEngineChange() {
                 { value: 'v4l2',  icon: _icon(P.monitor),   label: 'V4L2',  desc: t('templates.config.camera_backend.v4l2') },
             ],
         },
+        resolution: {
+            columns: 2,
+            items: [
+                { value: 'auto',      icon: _icon(P.slidersHorizontal), label: 'Auto',      desc: t('templates.config.resolution.auto') },
+                { value: '640x480',   icon: _icon(P.monitor),           label: '640×480',   desc: t('templates.config.resolution.480p') },
+                { value: '1280x720',  icon: _icon(P.monitor),           label: '1280×720',  desc: t('templates.config.resolution.720p') },
+                { value: '1920x1080', icon: _icon(P.tv),                label: '1920×1080', desc: t('templates.config.resolution.1080p') },
+                { value: '2560x1440', icon: _icon(P.tv),                label: '2560×1440', desc: t('templates.config.resolution.1440p') },
+                { value: '3840x2160', icon: _icon(P.tv),                label: '3840×2160', desc: t('templates.config.resolution.2160p') },
+            ],
+        },
     };
 
+    const CONFIG_SELECT_OPTIONS: Record<string, string[]> = {};
+    const CONFIG_ICON_SELECT: Record<string, { columns: number; items: { value: string; icon: string; label: string; desc: string }[] }> = {};
+    for (const [key, choices] of Object.entries(configChoices)) {
+        if (!choices || choices.length === 0) continue;
+        CONFIG_SELECT_OPTIONS[key] = choices;
+        const cat = CONFIG_ICON_SELECT_CATALOGUE[key];
+        if (cat) {
+            const filtered = cat.items.filter(item => choices.includes(item.value));
+            if (filtered.length > 0) CONFIG_ICON_SELECT[key] = { columns: cat.columns, items: filtered };
+        }
+    }
+
     if (Object.keys(defaultConfig).length === 0) {
         configSection.style.display = 'none';
         return;
@@ -303,7 +325,10 @@ export async function onEngineChange() {
         // Apply IconSelect to known config selects
         for (const [key, cfg] of Object.entries(CONFIG_ICON_SELECT)) {
             const sel = document.getElementById(`config-${key}`);
-            if (sel) new IconSelect({ target: sel as HTMLSelectElement, items: cfg.items, columns: cfg.columns });
+            if (sel) {
+                const inst = new IconSelect({ target: sel as HTMLSelectElement, items: cfg.items, columns: cfg.columns });
+                _configIconSelects.set(key, inst);
+            }
         }
     }
 
@@ -315,7 +340,9 @@ function populateEngineConfig(config: any) {
         const field = document.getElementById(`config-${key}`) as HTMLInputElement | HTMLSelectElement | null;
         if (field) {
             if (field.tagName === 'SELECT') {
-                field.value = value.toString();
+                const iconSel = _configIconSelects.get(key);
+                if (iconSel) iconSel.setValue(value.toString());
+                else field.value = value.toString();
             } else {
                 field.value = value;
             }
@@ -339,11 +366,41 @@ function collectEngineConfig() {
     return config;
 }
 
+function _engineHasOwnDisplays(engineType: string | undefined | null): boolean {
+    if (!engineType) return false;
+    return !!availableEngines.find(e => e.type === engineType)?.has_own_displays;
+}
+
+function _updateTestPickerLabels() {
+    const engineType = currentTestingTemplate?.engine_type;
+    const useDevice = _engineHasOwnDisplays(engineType);
+    const labelEl = document.getElementById('test-template-display-label');
+    const pickerLabel = document.getElementById('test-display-picker-label');
+    if (labelEl) {
+        labelEl.textContent = t(useDevice ? 'templates.test.device' : 'templates.test.display');
+    }
+    // Only swap placeholder text when nothing has been selected yet
+    if (pickerLabel) {
+        const currentValue = (document.getElementById('test-template-display') as HTMLInputElement | null)?.value;
+        if (!currentValue) {
+            pickerLabel.textContent = t(useDevice ? 'templates.test.device.select' : 'displays.picker.select');
+        }
+    }
+}
+
+export function openTestDisplayPicker() {
+    const engineType = currentTestingTemplate?.engine_type || null;
+    const pickerEngineType = _engineHasOwnDisplays(engineType) ? engineType : null;
+    const currentValue = (document.getElementById('test-template-display') as HTMLInputElement).value;
+    openDisplayPicker((window as any).onTestDisplaySelected, currentValue, pickerEngineType);
+}
+
 async function loadDisplaysForTest() {
     try {
         // Use engine-specific display list for engines with own devices (camera, scrcpy)
         const engineType = currentTestingTemplate?.engine_type;
-        const engineHasOwnDisplays = availableEngines.find(e => e.type === engineType)?.has_own_displays || false;
+        const engineHasOwnDisplays = _engineHasOwnDisplays(engineType);
+        _updateTestPickerLabels();
         const url = engineHasOwnDisplays
             ? `/config/displays?engine_type=${engineType}`
             : '/config/displays';
@@ -389,7 +446,10 @@ export function runTemplateTest() {
     const captureDuration = parseFloat((document.getElementById('test-template-duration') as HTMLInputElement).value);
 
     if (displayIndex === '') {
-        showToast(t('templates.test.error.no_display'), 'error');
+        const errKey = _engineHasOwnDisplays(currentTestingTemplate.engine_type)
+            ? 'templates.test.error.no_device'
+            : 'templates.test.error.no_display';
+        showToast(t(errKey), 'error');
         return;
     }
 

server/src/ledgrab/static/js/features/streams.ts

@@ -9,7 +9,7 @@ import {
     _cachedPPTemplates,
     _cachedCaptureTemplates,
     _availableFilters,
-    availableEngines, setAvailableEngines,
+    availableEngines,
     currentEditingTemplateId, setCurrentEditingTemplateId,
     _templateNameManuallyEdited, set_templateNameManuallyEdited,
     _streamNameManuallyEdited, set_streamNameManuallyEdited,
@@ -32,7 +32,7 @@ import {
     _audioTemplateNameManuallyEdited, set_audioTemplateNameManuallyEdited,
     _sourcesLoading, set_sourcesLoading,
     apiKey,
-    streamsCache, ppTemplatesCache, captureTemplatesCache,
+    streamsCache, ppTemplatesCache, captureTemplatesCache, enginesCache,
     audioSourcesCache, audioTemplatesCache, valueSourcesCache, syncClocksCache, assetsCache, _cachedAssets, filtersCache,
     colorStripSourcesCache,
     csptCache, stripFiltersCache,
@@ -259,7 +259,7 @@ import { showAddTemplateModal as _localShowAddTemplateModal, _runTestViaWS as _l
 export {
     showAddTemplateModal, editTemplate, closeTemplateModal, saveTemplate, deleteTemplate,
     showTestTemplateModal, closeTestTemplateModal, onEngineChange, runTemplateTest,
-    updateCaptureDuration, _runTestViaWS,
+    updateCaptureDuration, _runTestViaWS, openTestDisplayPicker,
 } from './streams-capture-templates.ts';
 
 // ── Audio Templates (extracted to streams-audio-templates.ts) ──
@@ -1166,7 +1166,9 @@ export async function editStream(streamId: any) {
         await populateStreamModalDropdowns();
 
         if (stream.stream_type === 'raw') {
-            (document.getElementById('stream-capture-template') as HTMLSelectElement).value = stream.capture_template_id || '';
+            const tplId = stream.capture_template_id || '';
+            (document.getElementById('stream-capture-template') as HTMLSelectElement).value = tplId;
+            if (_captureTemplateEntitySelect) _captureTemplateEntitySelect.setValue(tplId);
             // Ensure correct engine displays are loaded for this template
             await _onCaptureTemplateChanged();
             const displayIdx = stream.display_index ?? 0;
@@ -1176,8 +1178,12 @@ export async function editStream(streamId: any) {
             (document.getElementById('stream-target-fps') as HTMLInputElement).value = fps;
             document.getElementById('stream-target-fps-value')!.textContent = fps;
         } else if (stream.stream_type === 'processed') {
-            (document.getElementById('stream-source') as HTMLSelectElement).value = stream.source_stream_id || '';
-            (document.getElementById('stream-pp-template') as HTMLSelectElement).value = stream.postprocessing_template_id || '';
+            const srcId = stream.source_stream_id || '';
+            const ppId = stream.postprocessing_template_id || '';
+            (document.getElementById('stream-source') as HTMLSelectElement).value = srcId;
+            if (_sourceEntitySelect) _sourceEntitySelect.setValue(srcId);
+            (document.getElementById('stream-pp-template') as HTMLSelectElement).value = ppId;
+            if (_ppTemplateEntitySelect) _ppTemplateEntitySelect.setValue(ppId);
         } else if (stream.stream_type === 'static_image') {
             if (stream.image_asset_id) {
                 (document.getElementById('stream-image-asset') as HTMLSelectElement).value = stream.image_asset_id;
@@ -1227,6 +1233,7 @@ async function populateStreamModalDropdowns() {
         streamsCache.fetch().catch((): any[] => []),
         ppTemplatesCache.fetch().catch((): any[] => []),
         displaysCache.fetch().catch((): any[] => []),
+        enginesCache.fetch().catch((): any[] => []),
     ]);
     _streamModalDisplaysEngine = null;
 

server/src/ledgrab/static/js/features/update.ts

@@ -523,26 +523,6 @@ function _formatPublished(iso: string | null | undefined): string | null {
 function _renderReleaseNotesHeader(): void {
     const release = _lastStatus?.release ?? null;
 
-    const name = release?.name?.trim() || '';
-    const version = release?.version?.trim() || '';
-    const nameEl = document.getElementById('release-notes-name');
-    if (nameEl) {
-        nameEl.textContent = name || t('update.release_notes');
-    }
-
-    // Only show the version accent when the name doesn't already contain
-    // the version — avoids rendering "LedGrab v0.5.0  v0.5.0".
-    const nameLower = name.toLowerCase();
-    const verLower = version.toLowerCase();
-    const nameHasVersion = !!verLower && (
-        nameLower.includes(verLower) || nameLower.includes('v' + verLower)
-    );
-    if (version && !nameHasVersion) {
-        _setRnText('release-notes-version', `v${version}`);
-    } else {
-        _setRnText('release-notes-version', null);
-    }
-
     const tag = release?.tag?.trim() || null;
     _setRnText('release-notes-tag', tag);
     _setRnChipShown('release-notes-tag-chip', !!tag);

server/src/ledgrab/static/js/features/value-sources.ts

@@ -14,6 +14,7 @@ import {
     _cachedValueSources, _cachedAudioSources, _cachedStreams, apiKey, valueSourcesCache,
     _cachedHASources, _cachedColorStripSources, gradientsCache, GradientEntity,
     _cachedGameIntegrations, _cachedGameAdapters, gameIntegrationsCache, gameAdaptersCache,
+    _cachedSyncClocks, syncClocksCache,
 } from '../core/state.ts';
 import { API_BASE, fetchWithAuth, escapeHtml } from '../core/api.ts';
 import { t } from '../core/i18n.ts';
@@ -24,7 +25,7 @@ import {
     ICON_CLONE, ICON_EDIT, ICON_TEST,
     ICON_LED_PREVIEW, ICON_ACTIVITY, ICON_TIMER, ICON_MOVE_VERTICAL, ICON_CLOCK,
     ICON_MUSIC, ICON_TRENDING_UP, ICON_MAP_PIN, ICON_MONITOR, ICON_REFRESH, ICON_TRASH,
-    ICON_HOME, ICON_RAINBOW, ICON_LINK, ICON_DROPLETS, ICON_GAMEPAD,
+    ICON_HOME, ICON_RAINBOW, ICON_LINK, ICON_DROPLETS, ICON_GAMEPAD, ICON_X,
 } from '../core/icons.ts';
 import { wrapCard } from '../core/card-colors.ts';
 import type { ModCardOpts, ModChipOpts } from '../core/mod-card.ts';
@@ -52,6 +53,7 @@ let _vsCSSSourceEntitySelect: EntitySelect | null = null;
 let _vsGradientEasingIconSelect: IconSelect | null = null;
 let _vsBehaviorIconSelect: IconSelect | null = null;
 let _vsMetricIconSelect: IconSelect | null = null;
+let _vsAnimColorClockEntitySelect: EntitySelect | null = null;
 let _vsTagsInput: TagInput | null = null;
 
 class ValueSourceModal extends Modal {
@@ -68,6 +70,7 @@ class ValueSourceModal extends Modal {
         if (_vsGradientEasingIconSelect) { _vsGradientEasingIconSelect.destroy(); _vsGradientEasingIconSelect = null; }
         if (_vsBehaviorIconSelect) { _vsBehaviorIconSelect.destroy(); _vsBehaviorIconSelect = null; }
         if (_vsMetricIconSelect) { _vsMetricIconSelect.destroy(); _vsMetricIconSelect = null; }
+        if (_vsAnimColorClockEntitySelect) { _vsAnimColorClockEntitySelect.destroy(); _vsAnimColorClockEntitySelect = null; }
         if (_vsGameIntegrationEntitySelect) { _vsGameIntegrationEntitySelect.destroy(); _vsGameIntegrationEntitySelect = null; }
     }
 
@@ -97,10 +100,12 @@ class ValueSourceModal extends Modal {
             daylightSpeed: (document.getElementById('value-source-daylight-speed') as HTMLInputElement).value,
             daylightRealTime: (document.getElementById('value-source-daylight-real-time') as HTMLInputElement).checked,
             daylightLatitude: (document.getElementById('value-source-daylight-latitude') as HTMLInputElement).value,
+            daylightLongitude: (document.getElementById('value-source-daylight-longitude') as HTMLInputElement).value,
             staticColor: (document.getElementById('value-source-static-color') as HTMLInputElement).value,
             animatedColors: JSON.stringify(_animatedColors),
             animatedColorSpeed: (document.getElementById('value-source-animated-color-speed') as HTMLInputElement).value,
             animatedColorEasing: (document.getElementById('value-source-animated-color-easing') as HTMLSelectElement).value,
+            animatedColorClock: (document.getElementById('value-source-animated-color-clock') as HTMLSelectElement)?.value || '',
             colorSchedule: JSON.stringify(_colorSchedulePoints),
             tags: JSON.stringify(_vsTagsInput ? _vsTagsInput.getValue() : []),
             metric: (document.getElementById('value-source-metric') as HTMLSelectElement).value,
@@ -200,11 +205,15 @@ function _ensureColorEasingIconSelect() {
     const sel = document.getElementById('value-source-animated-color-easing') as HTMLSelectElement | null;
     if (!sel) return;
     const items = [
-        { value: 'linear', icon: _icon(P.activity), label: t('value_source.animated_color.easing.linear'), desc: t('value_source.animated_color.easing.linear.desc') },
-        { value: 'step',   icon: _icon(P.layoutDashboard), label: t('value_source.animated_color.easing.step'), desc: t('value_source.animated_color.easing.step.desc') },
+        { value: 'linear',      icon: _icon(P.easingLinear), label: t('value_source.animated_color.easing.linear'),      desc: t('value_source.animated_color.easing.linear.desc') },
+        { value: 'step',        icon: _icon(P.easingStep),   label: t('value_source.animated_color.easing.step'),        desc: t('value_source.animated_color.easing.step.desc') },
+        { value: 'ease_in',     icon: _icon(P.easingIn),     label: t('value_source.animated_color.easing.ease_in'),     desc: t('value_source.animated_color.easing.ease_in.desc') },
+        { value: 'ease_out',    icon: _icon(P.easingOut),    label: t('value_source.animated_color.easing.ease_out'),    desc: t('value_source.animated_color.easing.ease_out.desc') },
+        { value: 'ease_in_out', icon: _icon(P.easingInOut),  label: t('value_source.animated_color.easing.ease_in_out'), desc: t('value_source.animated_color.easing.ease_in_out.desc') },
+        { value: 'sine',        icon: _icon(P.easingSine),   label: t('value_source.animated_color.easing.sine'),        desc: t('value_source.animated_color.easing.sine.desc') },
     ];
     if (_vsColorEasingIconSelect) { _vsColorEasingIconSelect.updateItems(items); return; }
-    _vsColorEasingIconSelect = new IconSelect({ target: sel, items, columns: 2 } as any);
+    _vsColorEasingIconSelect = new IconSelect({ target: sel, items, columns: 3 } as any);
 }
 
 /* ── Waveform canvas preview ──────────────────────────────────── */
@@ -500,6 +509,7 @@ export async function showValueSourceModal(editData: any, presetType: any = null
             _setSlider('value-source-daylight-speed', editData.speed ?? 1.0);
             (document.getElementById('value-source-daylight-real-time') as HTMLInputElement).checked = !!editData.use_real_time;
             _setSlider('value-source-daylight-latitude', editData.latitude ?? 50);
+            _setSlider('value-source-daylight-longitude', editData.longitude ?? 0);
             _syncDaylightVSSpeedVisibility();
             _setSlider('value-source-adaptive-min-value', editData.min_value ?? 0);
             _setSlider('value-source-adaptive-max-value', editData.max_value ?? 1);
@@ -512,6 +522,8 @@ export async function showValueSourceModal(editData: any, presetType: any = null
             _setSlider('value-source-animated-color-speed', editData.speed ?? 10.0);
             (document.getElementById('value-source-animated-color-easing') as HTMLSelectElement).value = editData.easing || 'linear';
             _ensureColorEasingIconSelect();
+            await syncClocksCache.fetch();
+            _populateAnimatedColorClockDropdown(editData.clock_id || '');
         } else if (editData.source_type === 'adaptive_time_color') {
             _colorSchedulePoints = (editData.schedule || []).map((p: any) => ({
                 time: p.time,
@@ -586,6 +598,7 @@ export async function showValueSourceModal(editData: any, presetType: any = null
         _setSlider('value-source-daylight-speed', 1.0);
         (document.getElementById('value-source-daylight-real-time') as HTMLInputElement).checked = false;
         _setSlider('value-source-daylight-latitude', 50);
+        _setSlider('value-source-daylight-longitude', 0);
         _syncDaylightVSSpeedVisibility();
         // Color type defaults
         (document.getElementById('value-source-static-color') as HTMLInputElement).value = '#ffffff';
@@ -593,6 +606,8 @@ export async function showValueSourceModal(editData: any, presetType: any = null
         _renderAnimatedColorList();
         _setSlider('value-source-animated-color-speed', 10.0);
         (document.getElementById('value-source-animated-color-easing') as HTMLSelectElement).value = 'linear';
+        await syncClocksCache.fetch();
+        _populateAnimatedColorClockDropdown('');
         _colorSchedulePoints = [];
         _renderColorScheduleList();
         // HA entity defaults
@@ -768,6 +783,7 @@ export async function saveValueSource() {
         payload.speed = parseFloat((document.getElementById('value-source-daylight-speed') as HTMLInputElement).value);
         payload.use_real_time = (document.getElementById('value-source-daylight-real-time') as HTMLInputElement).checked;
         payload.latitude = parseFloat((document.getElementById('value-source-daylight-latitude') as HTMLInputElement).value);
+        payload.longitude = parseFloat((document.getElementById('value-source-daylight-longitude') as HTMLInputElement).value);
         payload.min_value = parseFloat((document.getElementById('value-source-adaptive-min-value') as HTMLInputElement).value);
         payload.max_value = parseFloat((document.getElementById('value-source-adaptive-max-value') as HTMLInputElement).value);
     } else if (sourceType === 'static_color') {
@@ -776,6 +792,8 @@ export async function saveValueSource() {
         payload.colors = _getAnimatedColorsPayload();
         payload.speed = parseFloat((document.getElementById('value-source-animated-color-speed') as HTMLInputElement).value);
         payload.easing = (document.getElementById('value-source-animated-color-easing') as HTMLSelectElement).value;
+        // Send empty string to clear (resolve_ref pattern); a real ID otherwise.
+        payload.clock_id = (document.getElementById('value-source-animated-color-clock') as HTMLSelectElement).value || '';
     } else if (sourceType === 'adaptive_time_color') {
         payload.schedule = _getColorSchedulePayload();
     } else if (sourceType === 'ha_entity') {
@@ -1575,20 +1593,36 @@ export function removeAnimatedColor(idx: number) {
 function _renderAnimatedColorList() {
     const list = document.getElementById('value-source-animated-color-list');
     if (!list) return;
-    list.innerHTML = _animatedColors.map((c, i) => `
-        <div class="schedule-row" style="display:flex;align-items:center;gap:8px;margin-bottom:4px;">
+    const canRemove = _animatedColors.length > 1;
+    const chips = _animatedColors.map((c, i) => `
+        <div class="animated-color-chip" role="listitem" style="--chip-color:${c}">
             <input type="color" class="animated-color-input" value="${c}" data-idx="${i}"
-                onchange="_animatedColors[${i}] = this.value">
-            <button type="button" class="btn btn-icon btn-danger btn-sm" onclick="removeAnimatedColor(${i})">${ICON_TRASH}</button>
+                aria-label="Color ${i + 1}">
+            ${canRemove ? `
+                <button type="button" class="animated-color-remove"
+                        onclick="removeAnimatedColor(${i})"
+                        aria-label="Remove color ${i + 1}">${ICON_X}</button>
+            ` : ''}
         </div>
     `).join('');
-    // Wire up color inputs to update state immutably
+    const addBtn = `
+        <button type="button" class="animated-color-add" onclick="addAnimatedColor()"
+                aria-label="Add color">
+            <span class="animated-color-add-glyph">+</span>
+        </button>
+    `;
+    list.innerHTML = chips + addBtn;
+    // Wire up color inputs to update state immutably and refresh the chip's CSS variable
     list.querySelectorAll('.animated-color-input').forEach((el) => {
         const input = el as HTMLInputElement;
         const idx = parseInt(input.dataset.idx || '0', 10);
-        input.addEventListener('input', () => {
+        const chip = input.closest('.animated-color-chip') as HTMLElement | null;
+        const onChange = () => {
             _animatedColors = _animatedColors.map((c, i) => i === idx ? input.value : c);
-        });
+            if (chip) chip.style.setProperty('--chip-color', input.value);
+        };
+        input.addEventListener('input', onChange);
+        input.addEventListener('change', onChange);
     });
 }
 
@@ -1596,6 +1630,28 @@ function _getAnimatedColorsPayload(): number[][] {
     return _animatedColors.map(c => hexToRgbArray(c));
 }
 
+function _populateAnimatedColorClockDropdown(selectedId: string) {
+    const sel = document.getElementById('value-source-animated-color-clock') as HTMLSelectElement | null;
+    if (!sel) return;
+    sel.innerHTML = `<option value="">${t('common.none_own_speed')}</option>` +
+        _cachedSyncClocks.map(c => `<option value="${c.id}">${escapeHtml(c.name)} (${c.speed}x)</option>`).join('');
+    sel.value = selectedId || '';
+
+    if (_vsAnimColorClockEntitySelect) { _vsAnimColorClockEntitySelect.destroy(); _vsAnimColorClockEntitySelect = null; }
+    _vsAnimColorClockEntitySelect = new EntitySelect({
+        target: sel,
+        getItems: () => _cachedSyncClocks.map(c => ({
+            value: c.id,
+            label: c.name,
+            icon: ICON_CLOCK,
+            desc: `${c.speed}x`,
+        })),
+        placeholder: t('palette.search'),
+        allowNone: true,
+        noneLabel: t('common.none_own_speed'),
+    });
+}
+
 // ── Color Schedule helpers ──────────────────────────────────
 
 let _colorSchedulePoints: { time: string; color: string }[] = [];

server/src/ledgrab/static/js/global.d.ts

@@ -118,6 +118,7 @@ interface Window {
     closeTestTemplateModal: (...args: any[]) => any;
     onEngineChange: (...args: any[]) => any;
     runTemplateTest: (...args: any[]) => any;
+    openTestDisplayPicker: (...args: any[]) => any;
     updateCaptureDuration: (...args: any[]) => any;
     showAddStreamModal: (...args: any[]) => any;
     editStream: (...args: any[]) => any;
@@ -262,8 +263,6 @@ startTargetOverlay: (...args: any[]) => any;
     onCSSClockChange: (...args: any[]) => any;
     onAnimationTypeChange: (...args: any[]) => any;
     onDaylightRealTimeChange: (...args: any[]) => any;
-    colorCycleAddColor: (...args: any[]) => any;
-    colorCycleRemoveColor: (...args: any[]) => any;
     compositeAddLayer: (...args: any[]) => any;
     compositeRemoveLayer: (...args: any[]) => any;
     mappedAddZone: (...args: any[]) => any;

server/src/ledgrab/static/js/types.ts

@@ -135,7 +135,7 @@ export type OutputTarget = LedOutputTarget | HALightOutputTarget;
 
 export type CSSSourceType =
     | 'picture' | 'picture_advanced' | 'static' | 'gradient'
-    | 'color_cycle' | 'effect' | 'composite' | 'mapped'
+    | 'effect' | 'composite' | 'mapped'
     | 'audio' | 'api_input' | 'notification' | 'daylight'
     | 'candlelight' | 'processed' | 'weather' | 'key_colors'
     | 'game_event' | 'math_wave';
@@ -225,9 +225,6 @@ export interface ColorStripSource {
     // Gradient
     stops?: ColorStop[];
 
-    // Color cycle
-    colors?: number[][];
-
     // Effect
     effect_type?: string;
     palette?: string;
@@ -269,6 +266,7 @@ export interface ColorStripSource {
     // Daylight
     use_real_time?: boolean;
     latitude?: number;
+    longitude?: number;
 
     // Candlelight
     num_candles?: number;
@@ -398,6 +396,7 @@ export interface DaylightValueSource extends ValueSourceBase {
     speed: number;
     use_real_time: boolean;
     latitude: number;
+    longitude: number;
     min_value: number;
     max_value: number;
 }
@@ -414,6 +413,7 @@ export interface AnimatedColorValueSource extends ValueSourceBase {
     colors: number[][];
     speed: number;
     easing: string;
+    clock_id?: string;
 }
 
 export interface AdaptiveTimeColorValueSource extends ValueSourceBase {
@@ -653,6 +653,7 @@ export interface HomeAssistantConnectionStatus {
     name: string;
     connected: boolean;
     entity_count: number;
+    host?: string;
 }
 
 export interface HomeAssistantStatusResponse {
@@ -834,6 +835,7 @@ export interface EngineInfo {
     available: boolean;
     has_own_displays?: boolean;
     default_config?: Record<string, any>;
+    config_choices?: Record<string, string[]>;
 }
 
 // ── Display ───────────────────────────────────────────────────

server/src/ledgrab/static/locales/en.json

@@ -62,7 +62,14 @@
   "displays.none": "No displays available",
   "displays.failed": "Failed to load displays",
   "displays.picker.title": "Select a Display",
-  "displays.picker.title.device": "Select a Device",
+  "displays.picker.title.lead": "Select",
+  "displays.picker.title.accent": "Display",
+  "displays.picker.eyebrow.label": "Source",
+  "displays.picker.eyebrow.channel": "Display · Map",
+  "displays.picker.eyebrow.channel.device": "Device · List",
+  "displays.picker.foot.dismiss": "dismiss",
+  "displays.picker.foot.select": "select monitor",
+  "displays.picker.foot.select.device": "select device",
   "displays.picker.select": "Select display...",
   "displays.picker.click_to_select": "Click to select this display",
   "displays.picker.adb_connect": "Connect ADB device",
@@ -104,6 +111,12 @@
   "templates.config.camera_backend.dshow": "Windows DirectShow",
   "templates.config.camera_backend.msmf": "Windows Media Foundation",
   "templates.config.camera_backend.v4l2": "Linux Video4Linux2",
+  "templates.config.resolution.auto": "Open at the camera's max supported mode",
+  "templates.config.resolution.480p": "VGA — lowest CPU and bandwidth",
+  "templates.config.resolution.720p": "HD",
+  "templates.config.resolution.1080p": "Full HD",
+  "templates.config.resolution.1440p": "QHD / 2K",
+  "templates.config.resolution.2160p": "4K UHD — highest CPU and bandwidth",
   "templates.created": "Template created successfully",
   "templates.updated": "Template updated successfully",
   "templates.deleted": "Template deleted successfully",
@@ -116,6 +129,8 @@
   "templates.test.description": "Test this template before saving to see a capture preview and performance metrics.",
   "templates.test.display": "Display:",
   "templates.test.display.select": "Select display...",
+  "templates.test.device": "Device:",
+  "templates.test.device.select": "Select device...",
   "templates.test.duration": "Capture Duration (s):",
   "templates.test.border_width": "Border Width (px):",
   "templates.test.run": "Run",
@@ -138,6 +153,7 @@
   "templates.test.results.resolution": "Resolution:",
   "templates.test.error.no_engine": "Please select a capture engine",
   "templates.test.error.no_display": "Please select a display",
+  "templates.test.error.no_device": "Please select a device",
   "templates.test.error.failed": "Test failed",
   "devices.title": "Devices",
   "device.select_type": "Select Device Type",
@@ -1121,8 +1137,6 @@
   "color_strip.type.static.desc": "Single solid color fill",
   "color_strip.type.gradient": "Gradient",
   "color_strip.type.gradient.desc": "Smooth color transition across LEDs",
-  "color_strip.type.color_cycle": "Color Cycle",
-  "color_strip.type.color_cycle.desc": "Cycle through a list of colors",
   "color_strip.static_color": "Color:",
   "color_strip.static_color.hint": "The solid color that will be sent to all LEDs on the strip.",
   "color_strip.gradient.preview": "Gradient:",
@@ -1174,7 +1188,6 @@
   "color_strip.animation.type.none.desc": "Static colors with no animation",
   "color_strip.animation.type.breathing": "Breathing",
   "color_strip.animation.type.breathing.desc": "Smooth brightness fade in and out",
-  "color_strip.animation.type.color_cycle": "Color Cycle",
   "color_strip.animation.type.gradient_shift": "Gradient Shift",
   "color_strip.animation.type.gradient_shift.desc": "Slides the gradient along the strip",
   "color_strip.animation.type.wave": "Wave",
@@ -1195,12 +1208,6 @@
   "color_strip.animation.type.hue_rotate.desc": "Smoothly rotates all pixel hues while preserving saturation and brightness",
   "color_strip.animation.speed": "Speed:",
   "color_strip.animation.speed.hint": "Animation speed multiplier. 1.0 ≈ one cycle per second for Breathing; higher values cycle faster.",
-  "color_strip.color_cycle.colors": "Colors:",
-  "color_strip.color_cycle.colors.hint": "List of colors to cycle through smoothly. At least 2 required. Default is a full rainbow spectrum.",
-  "color_strip.color_cycle.add_color": "+ Add Color",
-  "color_strip.color_cycle.speed": "Speed:",
-  "color_strip.color_cycle.speed.hint": "Cycle speed multiplier. 1.0 ≈ one full cycle every 20 seconds; higher values cycle faster.",
-  "color_strip.color_cycle.min_colors": "Color cycle must have at least 2 colors",
   "color_strip.type.effect": "Effect",
   "color_strip.type.effect.desc": "Procedural effects like fire, plasma, aurora",
   "color_strip.type.effect.hint": "Procedural LED effects (fire, meteor, plasma, noise, aurora) generated in real time.",
@@ -1636,7 +1643,7 @@
   "value_source.type.adaptive_scene": "Adaptive (Scene)",
   "value_source.type.adaptive_scene.desc": "Adjusts by scene content",
   "value_source.type.daylight": "Daylight Cycle",
-  "value_source.type.daylight.desc": "Brightness follows day/night cycle",
+  "value_source.type.daylight.desc": "Value follows day/night cycle",
   "value_source.type.static_color": "Static Color",
   "value_source.type.static_color.desc": "Fixed RGB color",
   "value_source.type.animated_color": "Animated Color",
@@ -1706,18 +1713,30 @@
   "value_source.animated_color.speed": "Speed (cpm):",
   "value_source.animated_color.easing": "Easing:",
   "value_source.animated_color.easing.linear": "Linear",
-  "value_source.animated_color.easing.linear.desc": "Smooth blend between colors",
+  "value_source.animated_color.easing.linear.desc": "Constant rate blend between colors",
   "value_source.animated_color.easing.step": "Step",
   "value_source.animated_color.easing.step.desc": "Instant jump between colors",
+  "value_source.animated_color.easing.ease_in": "Ease In",
+  "value_source.animated_color.easing.ease_in.desc": "Slow start, accelerating into the next color",
+  "value_source.animated_color.easing.ease_out": "Ease Out",
+  "value_source.animated_color.easing.ease_out.desc": "Quick start, settling into the next color",
+  "value_source.animated_color.easing.ease_in_out": "Ease In Out",
+  "value_source.animated_color.easing.ease_in_out.desc": "Smooth at both ends, faster in the middle",
+  "value_source.animated_color.easing.sine": "Sine",
+  "value_source.animated_color.easing.sine.desc": "Sinusoidal curve — natural ambient cycling",
   "value_source.animated_color.color_count": "colors",
+  "value_source.animated_color.clock": "Animation Clock:",
+  "value_source.animated_color.clock.hint": "Optional sync clock — when set, the clock controls timing (its speed multiplier scales the cpm above) and pause state. Leave empty to run on the value source's own speed.",
   "value_source.adaptive_time_color.schedule": "Color Schedule:",
   "value_source.daylight.speed": "Speed:",
   "value_source.daylight.speed.hint": "Cycle speed multiplier. 1.0 = full day/night cycle in ~4 minutes. Higher values cycle faster.",
   "value_source.daylight.use_real_time": "Use Real Time:",
-  "value_source.daylight.use_real_time.hint": "When enabled, brightness follows the actual time of day. Speed is ignored.",
+  "value_source.daylight.use_real_time.hint": "When enabled, the value follows the actual time of day. Speed is ignored.",
   "value_source.daylight.enable_real_time": "Follow wall clock",
   "value_source.daylight.latitude": "Latitude:",
-  "value_source.daylight.latitude.hint": "Your geographic latitude (-90 to 90). Affects sunrise/sunset timing in real-time mode.",
+  "value_source.daylight.latitude.hint": "Your geographic latitude (-90 to 90). Steepens or flattens the sunrise/sunset edges of the cycle.",
+  "value_source.daylight.longitude": "Longitude:",
+  "value_source.daylight.longitude.hint": "Your geographic longitude (-180 to 180). Shifts solar noon for accurate sunrise/sunset alignment with your wall clock.",
   "value_source.daylight.real_time": "Real-time",
   "value_source.daylight.speed_label": "Speed",
   "value_source.value": "Value:",
@@ -1864,6 +1883,22 @@
   "settings.shutdown_action.opt.stop_desc": "Run the normal stop sequence (per-device auto-restore applies)",
   "settings.shutdown_action.opt.nothing": "Nothing",
   "settings.shutdown_action.opt.nothing_desc": "Leave lights showing the last frame",
+  "settings.daylight_timezone.label": "Daylight timezone",
+  "settings.daylight_timezone.hint": "IANA timezone every \"real-time\" daylight cycle reads its wall clock in. Empty (default) uses the server's system timezone.",
+  "settings.daylight_timezone.saved": "Daylight timezone saved",
+  "settings.daylight_timezone.save_error": "Failed to save daylight timezone",
+  "common.daylight_tz.system": "System default",
+  "common.daylight_tz.system_desc": "Server clock — no override",
+  "common.daylight_tz.detected": "Browser-detected",
+  "common.daylight_tz.detected_label": "Auto-detected",
+  "common.daylight_tz.search": "Search timezones, cities, regions…",
+  "common.daylight_tz.region.utc": "Universal",
+  "common.daylight_tz.region.europe": "Europe",
+  "common.daylight_tz.region.africa": "Africa",
+  "common.daylight_tz.region.me": "Middle East",
+  "common.daylight_tz.region.asia": "Asia",
+  "common.daylight_tz.region.pacific": "Pacific",
+  "common.daylight_tz.region.americas": "Americas",
   "settings.auto_backup.label": "Auto-Backup",
   "settings.auto_backup.hint": "Automatically create periodic backups of all configuration. Old backups are pruned when the maximum count is reached.",
   "settings.auto_backup.enable": "Enable auto-backup",

server/src/ledgrab/static/locales/ru.json

@@ -66,7 +66,14 @@
   "displays.none": "Нет доступных дисплеев",
   "displays.failed": "Не удалось загрузить дисплеи",
   "displays.picker.title": "Выберите Дисплей",
-  "displays.picker.title.device": "Выберите Устройство",
+  "displays.picker.title.lead": "Выбрать",
+  "displays.picker.title.accent": "Дисплей",
+  "displays.picker.eyebrow.label": "Источник",
+  "displays.picker.eyebrow.channel": "Дисплей · Карта",
+  "displays.picker.eyebrow.channel.device": "Устройство · Список",
+  "displays.picker.foot.dismiss": "закрыть",
+  "displays.picker.foot.select": "выбрать монитор",
+  "displays.picker.foot.select.device": "выбрать устройство",
   "displays.picker.select": "Выберите дисплей...",
   "displays.picker.click_to_select": "Нажмите, чтобы выбрать этот дисплей",
   "displays.picker.adb_connect": "Подключить ADB устройство",
@@ -108,6 +115,12 @@
   "templates.config.camera_backend.dshow": "Windows DirectShow",
   "templates.config.camera_backend.msmf": "Windows Media Foundation",
   "templates.config.camera_backend.v4l2": "Linux Video4Linux2",
+  "templates.config.resolution.auto": "Открыть в максимальном поддерживаемом разрешении камеры",
+  "templates.config.resolution.480p": "VGA — минимум CPU и трафика",
+  "templates.config.resolution.720p": "HD",
+  "templates.config.resolution.1080p": "Full HD",
+  "templates.config.resolution.1440p": "QHD / 2K",
+  "templates.config.resolution.2160p": "4K UHD — максимум CPU и трафика",
   "templates.created": "Шаблон успешно создан",
   "templates.updated": "Шаблон успешно обновлён",
   "templates.deleted": "Шаблон успешно удалён",
@@ -120,6 +133,8 @@
   "templates.test.description": "Протестируйте этот шаблон перед сохранением, чтобы увидеть предпросмотр захвата и метрики производительности.",
   "templates.test.display": "Дисплей:",
   "templates.test.display.select": "Выберите дисплей...",
+  "templates.test.device": "Устройство:",
+  "templates.test.device.select": "Выберите устройство...",
   "templates.test.duration": "Длительность Захвата (с):",
   "templates.test.border_width": "Ширина Границы (px):",
   "templates.test.run": "Запустить",
@@ -142,6 +157,7 @@
   "templates.test.results.resolution": "Разрешение:",
   "templates.test.error.no_engine": "Пожалуйста, выберите движок захвата",
   "templates.test.error.no_display": "Пожалуйста, выберите дисплей",
+  "templates.test.error.no_device": "Пожалуйста, выберите устройство",
   "templates.test.error.failed": "Тест не удался",
   "devices.title": "Устройства",
   "device.select_type": "Выберите тип устройства",
@@ -1102,8 +1118,6 @@
   "color_strip.type.static.desc": "Заливка одним цветом",
   "color_strip.type.gradient": "Градиент",
   "color_strip.type.gradient.desc": "Плавный переход цветов по ленте",
-  "color_strip.type.color_cycle": "Смена цвета",
-  "color_strip.type.color_cycle.desc": "Циклическая смена списка цветов",
   "color_strip.static_color": "Цвет:",
   "color_strip.static_color.hint": "Статический цвет, который будет отправлен на все светодиоды полосы.",
   "color_strip.gradient.preview": "Градиент:",
@@ -1142,7 +1156,6 @@
   "color_strip.animation.type.none.desc": "Статичные цвета без анимации",
   "color_strip.animation.type.breathing": "Дыхание",
   "color_strip.animation.type.breathing.desc": "Плавное угасание и нарастание яркости",
-  "color_strip.animation.type.color_cycle": "Смена цвета",
   "color_strip.animation.type.gradient_shift": "Сдвиг градиента",
   "color_strip.animation.type.gradient_shift.desc": "Сдвигает градиент вдоль ленты",
   "color_strip.animation.type.wave": "Волна",
@@ -1159,12 +1172,6 @@
   "color_strip.animation.type.rainbow_fade.desc": "Циклический переход по всему спектру оттенков",
   "color_strip.animation.speed": "Скорость:",
   "color_strip.animation.speed.hint": "Множитель скорости анимации. 1.0 ≈ один цикл в секунду для дыхания; большие значения ускоряют анимацию.",
-  "color_strip.color_cycle.colors": "Цвета:",
-  "color_strip.color_cycle.colors.hint": "Список цветов для плавной циклической смены. Минимум 2 цвета. По умолчанию — полный радужный спектр.",
-  "color_strip.color_cycle.add_color": "+ Добавить цвет",
-  "color_strip.color_cycle.speed": "Скорость:",
-  "color_strip.color_cycle.speed.hint": "Множитель скорости смены. 1.0 ≈ один полный цикл за 20 секунд; большие значения ускоряют смену.",
-  "color_strip.color_cycle.min_colors": "Смена цвета должна содержать не менее 2 цветов",
   "color_strip.type.effect": "Эффект",
   "color_strip.type.effect.desc": "Процедурные эффекты: огонь, плазма, аврора",
   "color_strip.type.effect.hint": "Процедурные LED-эффекты (огонь, метеор, плазма, шум, аврора), генерируемые в реальном времени.",
@@ -1526,14 +1533,16 @@
   "value_source.type.adaptive_scene": "Адаптивный (Сцена)",
   "value_source.type.adaptive_scene.desc": "Подстройка по содержимому сцены",
   "value_source.type.daylight": "Дневной цикл",
-  "value_source.type.daylight.desc": "Яркость следует за циклом дня/ночи",
+  "value_source.type.daylight.desc": "Значение следует циклу дня/ночи",
   "value_source.daylight.speed": "Скорость:",
   "value_source.daylight.speed.hint": "Множитель скорости цикла. 1.0 = полный цикл день/ночь за ~4 минуты.",
   "value_source.daylight.use_real_time": "Реальное время:",
-  "value_source.daylight.use_real_time.hint": "Яркость следует за реальным временем суток. Скорость игнорируется.",
+  "value_source.daylight.use_real_time.hint": "Значение следует за реальным временем суток. Скорость игнорируется.",
   "value_source.daylight.enable_real_time": "Следовать за часами",
   "value_source.daylight.latitude": "Широта:",
-  "value_source.daylight.latitude.hint": "Географическая широта (-90 до 90). Влияет на время восхода/заката в режиме реального времени.",
+  "value_source.daylight.latitude.hint": "Географическая широта (-90 до 90). Делает переходы рассвета и заката круче или плавнее.",
+  "value_source.daylight.longitude": "Долгота:",
+  "value_source.daylight.longitude.hint": "Географическая долгота (-180 до 180). Сдвигает солнечный полдень для точного совпадения восхода и заката с настенными часами.",
   "value_source.daylight.real_time": "Реальное время",
   "value_source.daylight.speed_label": "Скорость",
   "value_source.value": "Значение:",
@@ -1680,6 +1689,22 @@
   "settings.shutdown_action.opt.stop_desc": "Обычная остановка (учитывается авто-восстановление устройств)",
   "settings.shutdown_action.opt.nothing": "Ничего",
   "settings.shutdown_action.opt.nothing_desc": "Оставить свет на последнем кадре",
+  "settings.daylight_timezone.label": "Часовой пояс дневного цикла",
+  "settings.daylight_timezone.hint": "IANA часовой пояс, в котором каждый дневной цикл «реального времени» читает настенные часы. Пусто (по умолчанию) — использовать системный часовой пояс сервера.",
+  "settings.daylight_timezone.saved": "Часовой пояс дневного цикла сохранён",
+  "settings.daylight_timezone.save_error": "Не удалось сохранить часовой пояс",
+  "common.daylight_tz.system": "Системный по умолчанию",
+  "common.daylight_tz.system_desc": "Часы сервера — без переопределения",
+  "common.daylight_tz.detected": "Определён браузером",
+  "common.daylight_tz.detected_label": "Авто-определение",
+  "common.daylight_tz.search": "Поиск по поясам, городам, регионам…",
+  "common.daylight_tz.region.utc": "Универсальное",
+  "common.daylight_tz.region.europe": "Европа",
+  "common.daylight_tz.region.africa": "Африка",
+  "common.daylight_tz.region.me": "Ближний Восток",
+  "common.daylight_tz.region.asia": "Азия",
+  "common.daylight_tz.region.pacific": "Тихий океан",
+  "common.daylight_tz.region.americas": "Америка",
   "settings.auto_backup.label": "Авто-бэкап",
   "settings.auto_backup.hint": "Автоматическое создание периодических резервных копий конфигурации. Старые копии удаляются при превышении максимального количества.",
   "settings.auto_backup.enable": "Включить авто-бэкап",

server/src/ledgrab/static/locales/zh.json

@@ -66,7 +66,14 @@
   "displays.none": "没有可用的显示器",
   "displays.failed": "加载显示器失败",
   "displays.picker.title": "选择显示器",
-  "displays.picker.title.device": "选择设备",
+  "displays.picker.title.lead": "选择",
+  "displays.picker.title.accent": "显示器",
+  "displays.picker.eyebrow.label": "来源",
+  "displays.picker.eyebrow.channel": "显示器 · 布局",
+  "displays.picker.eyebrow.channel.device": "设备 · 列表",
+  "displays.picker.foot.dismiss": "关闭",
+  "displays.picker.foot.select": "选择显示器",
+  "displays.picker.foot.select.device": "选择设备",
   "displays.picker.select": "选择显示器...",
   "displays.picker.click_to_select": "点击选择此显示器",
   "displays.picker.adb_connect": "连接 ADB 设备",
@@ -108,6 +115,12 @@
   "templates.config.camera_backend.dshow": "Windows DirectShow",
   "templates.config.camera_backend.msmf": "Windows Media Foundation",
   "templates.config.camera_backend.v4l2": "Linux Video4Linux2",
+  "templates.config.resolution.auto": "以摄像头支持的最高模式打开",
+  "templates.config.resolution.480p": "VGA — CPU 与带宽最低",
+  "templates.config.resolution.720p": "HD",
+  "templates.config.resolution.1080p": "Full HD",
+  "templates.config.resolution.1440p": "QHD / 2K",
+  "templates.config.resolution.2160p": "4K UHD — CPU 与带宽最高",
   "templates.created": "模板创建成功",
   "templates.updated": "模板更新成功",
   "templates.deleted": "模板删除成功",
@@ -120,6 +133,8 @@
   "templates.test.description": "保存前测试此模板，查看采集预览和性能指标。",
   "templates.test.display": "显示器：",
   "templates.test.display.select": "选择显示器...",
+  "templates.test.device": "设备：",
+  "templates.test.device.select": "选择设备...",
   "templates.test.duration": "采集时长（秒）：",
   "templates.test.border_width": "边框宽度（像素）：",
   "templates.test.run": "运行",
@@ -142,6 +157,7 @@
   "templates.test.results.resolution": "分辨率:",
   "templates.test.error.no_engine": "请选择采集引擎",
   "templates.test.error.no_display": "请选择显示器",
+  "templates.test.error.no_device": "请选择设备",
   "templates.test.error.failed": "测试失败",
   "devices.title": "设备",
   "device.select_type": "选择设备类型",
@@ -1102,8 +1118,6 @@
   "color_strip.type.static.desc": "单色填充",
   "color_strip.type.gradient": "渐变",
   "color_strip.type.gradient.desc": "LED上的平滑颜色过渡",
-  "color_strip.type.color_cycle": "颜色循环",
-  "color_strip.type.color_cycle.desc": "循环切换颜色列表",
   "color_strip.static_color": "颜色：",
   "color_strip.static_color.hint": "将发送到灯带上所有 LED 的纯色。",
   "color_strip.gradient.preview": "渐变：",
@@ -1142,7 +1156,6 @@
   "color_strip.animation.type.none.desc": "静态颜色，无动画",
   "color_strip.animation.type.breathing": "呼吸",
   "color_strip.animation.type.breathing.desc": "平滑的亮度渐入渐出",
-  "color_strip.animation.type.color_cycle": "颜色循环",
   "color_strip.animation.type.gradient_shift": "渐变移动",
   "color_strip.animation.type.gradient_shift.desc": "渐变沿灯带滑动",
   "color_strip.animation.type.wave": "波浪",
@@ -1159,12 +1172,6 @@
   "color_strip.animation.type.rainbow_fade.desc": "循环整个色相光谱",
   "color_strip.animation.speed": "速度：",
   "color_strip.animation.speed.hint": "动画速度倍数。1.0 ≈ 呼吸效果每秒一个循环；更高值循环更快。",
-  "color_strip.color_cycle.colors": "颜色：",
-  "color_strip.color_cycle.colors.hint": "平滑循环的颜色列表。至少需要 2 种。默认为全彩虹光谱。",
-  "color_strip.color_cycle.add_color": "+ 添加颜色",
-  "color_strip.color_cycle.speed": "速度：",
-  "color_strip.color_cycle.speed.hint": "循环速度倍数。1.0 ≈ 每 20 秒一个完整循环；更高值循环更快。",
-  "color_strip.color_cycle.min_colors": "颜色循环至少需要 2 种颜色",
   "color_strip.type.effect": "效果",
   "color_strip.type.effect.desc": "程序化效果：火焰、等离子、极光",
   "color_strip.type.effect.hint": "实时生成的程序化 LED 效果（火焰、流星、等离子、噪声、极光）。",
@@ -1526,14 +1533,16 @@
   "value_source.type.adaptive_scene": "自适应（场景）",
   "value_source.type.adaptive_scene.desc": "按场景内容调节",
   "value_source.type.daylight": "日光周期",
-  "value_source.type.daylight.desc": "亮度跟随日夜周期",
+  "value_source.type.daylight.desc": "数值跟随昼夜周期",
   "value_source.daylight.speed": "速度：",
   "value_source.daylight.speed.hint": "周期速度倍率。1.0 = 完整日夜周期约4分钟。",
   "value_source.daylight.use_real_time": "使用实时：",
-  "value_source.daylight.use_real_time.hint": "启用后，亮度跟随实际时间。速度设置将被忽略。",
+  "value_source.daylight.use_real_time.hint": "启用后，数值跟随实际时间。速度设置将被忽略。",
   "value_source.daylight.enable_real_time": "跟随系统时钟",
   "value_source.daylight.latitude": "纬度：",
-  "value_source.daylight.latitude.hint": "地理纬度（-90到90）。影响实时模式下的日出/日落时间。",
+  "value_source.daylight.latitude.hint": "地理纬度（-90到90）。使日出/日落过渡更陡峭或更平缓。",
+  "value_source.daylight.longitude": "经度：",
+  "value_source.daylight.longitude.hint": "地理经度（-180到180）。偏移正午时刻，使日出/日落与挂钟时间对齐。",
   "value_source.daylight.real_time": "实时",
   "value_source.daylight.speed_label": "速度",
   "value_source.value": "值：",
@@ -1680,6 +1689,22 @@
   "settings.shutdown_action.opt.stop_desc": "执行正常停止流程（按设备应用自动恢复）",
   "settings.shutdown_action.opt.nothing": "无",
   "settings.shutdown_action.opt.nothing_desc": "让灯保持最后一帧",
+  "settings.daylight_timezone.label": "日光周期时区",
+  "settings.daylight_timezone.hint": "所有“实时”日光周期读取挂钟时间所用的 IANA 时区。留空（默认）则使用服务器的系统时区。",
+  "settings.daylight_timezone.saved": "日光周期时区已保存",
+  "settings.daylight_timezone.save_error": "保存日光周期时区失败",
+  "common.daylight_tz.system": "系统默认",
+  "common.daylight_tz.system_desc": "服务器时钟 — 不覆盖",
+  "common.daylight_tz.detected": "浏览器检测",
+  "common.daylight_tz.detected_label": "自动检测",
+  "common.daylight_tz.search": "搜索时区、城市、地区…",
+  "common.daylight_tz.region.utc": "世界标准",
+  "common.daylight_tz.region.europe": "欧洲",
+  "common.daylight_tz.region.africa": "非洲",
+  "common.daylight_tz.region.me": "中东",
+  "common.daylight_tz.region.asia": "亚洲",
+  "common.daylight_tz.region.pacific": "太平洋",
+  "common.daylight_tz.region.americas": "美洲",
   "settings.auto_backup.label": "自动备份",
   "settings.auto_backup.hint": "自动定期创建所有配置的备份。当达到最大数量时，旧备份会被自动清理。",
   "settings.auto_backup.enable": "启用自动备份",

server/src/ledgrab/storage/audio_source.py

@@ -97,11 +97,13 @@ class CaptureAudioSource(AudioSource):
     @classmethod
     def from_dict(cls, data: dict) -> "CaptureAudioSource":
         common = _parse_common_fields(data)
+        raw_device_index = data.get("device_index")
+        raw_is_loopback = data.get("is_loopback")
         return cls(
             **common,
             source_type="capture",
-            device_index=int(data.get("device_index", -1)),
-            is_loopback=bool(data.get("is_loopback", True)),
+            device_index=int(raw_device_index) if raw_device_index is not None else -1,
+            is_loopback=bool(raw_is_loopback) if raw_is_loopback is not None else True,
             audio_template_id=data.get("audio_template_id"),
         )
 

server/src/ledgrab/storage/color_strip_source.py

@@ -9,7 +9,6 @@ Current types:
   AdvancedPictureColorStripSource  —  line-based calibration across multiple PictureSources
   StaticColorStripSource    —  constant solid color fills all LEDs
   GradientColorStripSource  —  linear gradient across all LEDs from user-defined color stops
-  ColorCycleColorStripSource —  smoothly cycles through a user-defined list of colors
   AudioColorStripSource      —  audio-reactive visualization (spectrum, beat pulse, VU meter)
   ApiInputColorStripSource   —  receives raw LED colors from external clients via REST/WebSocket
   NotificationColorStripSource — fires one-shot visual alerts (flash, pulse, sweep) via API
@@ -69,7 +68,7 @@ class ColorStripSource:
     def sharable(self) -> bool:
         """Whether multiple consumers can share a single stream instance.
 
-        Count-dependent sources (static, gradient, cycle, effect) return False
+        Count-dependent sources (static, gradient, effect) return False
         because each consumer may configure a different LED count.
         """
         return False
@@ -517,82 +516,6 @@ class GradientColorStripSource(ColorStripSource):
             self.gradient_id = kwargs["gradient_id"]
 
 
-@dataclass
-class ColorCycleColorStripSource(ColorStripSource):
-    """Color strip source that smoothly cycles through a user-defined list of colors.
-
-    All LEDs receive the same solid color at any point in time, smoothly
-    interpolating between the configured color stops in a continuous loop.
-    LED count auto-sizes from the connected device.
-    """
-
-    colors: list = field(
-        default_factory=lambda: [
-            [255, 0, 0],
-            [255, 255, 0],
-            [0, 255, 0],
-            [0, 255, 255],
-            [0, 0, 255],
-            [255, 0, 255],
-        ]
-    )
-
-    def to_dict(self) -> dict:
-        d = super().to_dict()
-        d["colors"] = [list(c) for c in self.colors]
-        return d
-
-    @classmethod
-    def from_dict(cls, data: dict) -> "ColorCycleColorStripSource":
-        common = _parse_css_common(data)
-        raw_colors = data.get("colors")
-        return cls(
-            **common,
-            source_type="color_cycle",
-            colors=raw_colors if isinstance(raw_colors, list) else [],
-        )
-
-    @classmethod
-    def create_from_kwargs(
-        cls,
-        *,
-        id: str,
-        name: str,
-        source_type: str,
-        created_at: datetime,
-        updated_at: datetime,
-        description=None,
-        clock_id=None,
-        tags=None,
-        colors=None,
-        **_kwargs,
-    ):
-        default_colors = [
-            [255, 0, 0],
-            [255, 255, 0],
-            [0, 255, 0],
-            [0, 255, 255],
-            [0, 0, 255],
-            [255, 0, 255],
-        ]
-        return cls(
-            id=id,
-            name=name,
-            source_type="color_cycle",
-            created_at=created_at,
-            updated_at=updated_at,
-            description=description,
-            clock_id=clock_id,
-            tags=tags or [],
-            colors=colors if isinstance(colors, list) and len(colors) >= 2 else default_colors,
-        )
-
-    def apply_update(self, **kwargs) -> None:
-        colors = kwargs.get("colors")
-        if colors is not None and isinstance(colors, list) and len(colors) >= 2:
-            self.colors = colors
-
-
 @dataclass
 class EffectColorStripSource(ColorStripSource):
     """Color strip source that runs a procedural LED effect.
@@ -1893,7 +1816,6 @@ _SOURCE_TYPE_MAP: Dict[str, Type[ColorStripSource]] = {
     "picture_advanced": AdvancedPictureColorStripSource,
     "static": StaticColorStripSource,
     "gradient": GradientColorStripSource,
-    "color_cycle": ColorCycleColorStripSource,
     "effect": EffectColorStripSource,
     "audio": AudioColorStripSource,
     "composite": CompositeColorStripSource,

server/src/ledgrab/storage/color_strip_store.py

@@ -8,9 +8,11 @@ from ledgrab.storage.base_sqlite_store import BaseSqliteStore
 from ledgrab.storage.database import Database
 from ledgrab.storage.utils import resolve_ref
 from ledgrab.storage.color_strip_source import (
+    AdvancedPictureColorStripSource,
     ColorStripSource,
     CompositeColorStripSource,
     MappedColorStripSource,
+    PictureColorStripSource,
     ProcessedColorStripSource,
 )
 from ledgrab.utils import get_logger
@@ -252,3 +254,24 @@ class ColorStripStore(BaseSqliteStore[ColorStripSource]):
                 if source.input_source_id == source_id:
                     names.append(source.name)
         return names
+
+    def get_referencing_picture_source(self, picture_source_id: str) -> List[ColorStripSource]:
+        """Return color strip sources that reference a given picture source.
+
+        Includes simple `PictureColorStripSource` (via `picture_source_id`) and
+        `AdvancedPictureColorStripSource` (via per-line calibration entries).
+        """
+        result: List[ColorStripSource] = []
+        for source in self._items.values():
+            if (
+                isinstance(source, PictureColorStripSource)
+                and source.picture_source_id == picture_source_id
+            ):
+                result.append(source)
+            elif isinstance(source, AdvancedPictureColorStripSource):
+                lines = getattr(source.calibration, "lines", None) or []
+                if any(
+                    getattr(line, "picture_source_id", "") == picture_source_id for line in lines
+                ):
+                    result.append(source)
+        return result

server/src/ledgrab/storage/picture_source_store.py

@@ -305,9 +305,29 @@ class PictureSourceStore(BaseSqliteStore[PictureSource]):
 
     # ── Query helpers ─────────────────────────────────────────────────
 
-    def get_targets_referencing(self, stream_id: str, target_store) -> List[str]:
-        """Return names of targets that reference this stream."""
-        return target_store.get_targets_referencing_source(stream_id)
+    def get_targets_referencing(self, stream_id: str, target_store, css_store=None) -> List[str]:
+        """Return names of output targets that transitively reference this stream.
+
+        Output targets reference picture sources only via color strip sources, so
+        this walks: picture source → CSS → target. Returns deduped target names
+        in stable order. ``css_store`` is required for transitive resolution; if
+        omitted, returns an empty list (legacy callers without a CSS store).
+        """
+        if css_store is None:
+            return []
+
+        css_list = css_store.get_referencing_picture_source(stream_id)
+        if not css_list:
+            return []
+
+        seen: Set[str] = set()
+        ordered: List[str] = []
+        for css in css_list:
+            for name in target_store.get_targets_referencing_css(css.id):
+                if name not in seen:
+                    seen.add(name)
+                    ordered.append(name)
+        return ordered
 
     def resolve_stream_chain(self, stream_id: str) -> dict:
         """Resolve a stream chain to get the terminal stream and collected postprocessing templates.

server/src/ledgrab/storage/value_source.py

@@ -63,6 +63,7 @@ class ValueSource:
             "scene_behavior": None,
             "use_real_time": None,
             "latitude": None,
+            "longitude": None,
         }
 
     @staticmethod
@@ -254,6 +255,7 @@ class DaylightValueSource(ValueSource):
     speed: float = 1.0  # simulation speed (ignored when use_real_time)
     use_real_time: bool = False  # use wall clock instead of simulation
     latitude: float = 50.0  # affects sunrise/sunset in real-time mode
+    longitude: float = 0.0  # affects solar noon offset
     min_value: float = 0.0  # output range min
     max_value: float = 1.0  # output range max
 
@@ -262,6 +264,7 @@ class DaylightValueSource(ValueSource):
         d["speed"] = self.speed
         d["use_real_time"] = self.use_real_time
         d["latitude"] = self.latitude
+        d["longitude"] = self.longitude
         d["min_value"] = self.min_value
         d["max_value"] = self.max_value
         return d
@@ -275,6 +278,7 @@ class DaylightValueSource(ValueSource):
             speed=float(data.get("speed") or 1.0),
             use_real_time=bool(data.get("use_real_time", False)),
             latitude=float(data.get("latitude") or 50.0),
+            longitude=float(data.get("longitude") or 0.0),
             min_value=float(data.get("min_value") or 0.0),
             max_value=float(data["max_value"]) if data.get("max_value") is not None else 1.0,
         )
@@ -312,12 +316,14 @@ class AnimatedColorValueSource(ValueSource):
     colors: list = field(default_factory=lambda: [[255, 0, 0], [0, 255, 0], [0, 0, 255]])
     speed: float = 10.0  # cycles per minute
     easing: str = "linear"  # linear | step
+    clock_id: Optional[str] = None  # optional SyncClock reference for shared timing
 
     def to_dict(self) -> dict:
         d = super().to_dict()
         d["colors"] = [list(c) for c in self.colors]
         d["speed"] = self.speed
         d["easing"] = self.easing
+        d["clock_id"] = self.clock_id
         d["return_type"] = "color"
         return d
 
@@ -336,6 +342,7 @@ class AnimatedColorValueSource(ValueSource):
             colors=colors,
             speed=float(data.get("speed") or 10.0),
             easing=data.get("easing") or "linear",
+            clock_id=data.get("clock_id") or None,
         )
 
 

server/src/ledgrab/storage/value_source_store.py

@@ -64,6 +64,7 @@ class ValueSourceStore(BaseSqliteStore[ValueSource]):
         auto_gain: Optional[bool] = None,
         use_real_time: Optional[bool] = None,
         latitude: Optional[float] = None,
+        longitude: Optional[float] = None,
         color: Optional[list] = None,
         colors: Optional[list] = None,
         easing: Optional[str] = None,
@@ -83,6 +84,7 @@ class ValueSourceStore(BaseSqliteStore[ValueSource]):
         disk_path: Optional[str] = None,
         sensor_label: Optional[str] = None,
         poll_interval: Optional[float] = None,
+        clock_id: Optional[str] = None,
     ) -> ValueSource:
         _VALID = (
             "static",
@@ -195,6 +197,7 @@ class ValueSourceStore(BaseSqliteStore[ValueSource]):
                 speed=speed if speed is not None else 1.0,
                 use_real_time=bool(use_real_time) if use_real_time is not None else False,
                 latitude=latitude if latitude is not None else 50.0,
+                longitude=longitude if longitude is not None else 0.0,
                 min_value=min_value if min_value is not None else 0.0,
                 max_value=max_value if max_value is not None else 1.0,
             )
@@ -225,6 +228,7 @@ class ValueSourceStore(BaseSqliteStore[ValueSource]):
                 ),
                 speed=speed if speed is not None else 10.0,
                 easing=easing or "linear",
+                clock_id=clock_id or None,
             )
         elif source_type == "adaptive_time_color":
             schedule_data = schedule or []
@@ -338,6 +342,7 @@ class ValueSourceStore(BaseSqliteStore[ValueSource]):
         auto_gain: Optional[bool] = None,
         use_real_time: Optional[bool] = None,
         latitude: Optional[float] = None,
+        longitude: Optional[float] = None,
         color: Optional[list] = None,
         colors: Optional[list] = None,
         easing: Optional[str] = None,
@@ -357,6 +362,7 @@ class ValueSourceStore(BaseSqliteStore[ValueSource]):
         disk_path: Optional[str] = None,
         sensor_label: Optional[str] = None,
         poll_interval: Optional[float] = None,
+        clock_id: Optional[str] = None,
     ) -> ValueSource:
         source = self.get(source_id)
 
@@ -420,6 +426,8 @@ class ValueSourceStore(BaseSqliteStore[ValueSource]):
                 source.use_real_time = use_real_time
             if latitude is not None:
                 source.latitude = latitude
+            if longitude is not None:
+                source.longitude = longitude
             if min_value is not None:
                 source.min_value = min_value
             if max_value is not None:
@@ -434,6 +442,8 @@ class ValueSourceStore(BaseSqliteStore[ValueSource]):
                 source.speed = speed
             if easing is not None:
                 source.easing = easing
+            if clock_id is not None:
+                source.clock_id = resolve_ref(clock_id, source.clock_id)
         elif isinstance(source, AdaptiveTimeColorValueSource):
             if schedule is not None:
                 if len(schedule) < 2:

server/src/ledgrab/templates/index.html

@@ -523,6 +523,10 @@
             document.getElementById('targets-panel-content').innerHTML = loginMsg;
             document.getElementById('streams-list').innerHTML = loginMsg;
             document.getElementById('graph-editor-content').innerHTML = loginMsg;
+
+            // Re-open the login modal in forced mode so the user can sign back in
+            // without reloading. Mirrors the initial-load path in app.ts.
+            showApiKeyModal(null, true);
         }
 
         // Demo banner dismiss

server/src/ledgrab/templates/modals/css-editor.html

@@ -45,7 +45,6 @@
                         <option value="picture_advanced" data-i18n="color_strip.type.picture_advanced">Multi-Monitor</option>
                         <option value="static" data-i18n="color_strip.type.static">Static Color</option>
                         <option value="gradient" data-i18n="color_strip.type.gradient">Gradient</option>
-                        <option value="color_cycle" data-i18n="color_strip.type.color_cycle">Color Cycle</option>
                         <option value="effect" data-i18n="color_strip.type.effect">Procedural Effect</option>
                         <option value="composite" data-i18n="color_strip.type.composite">Composite</option>
                         <option value="mapped" data-i18n="color_strip.type.mapped">Mapped</option>
@@ -111,18 +110,6 @@
                     </div>
                 </div>
 
-                <!-- Color-cycle-specific fields -->
-                <div id="css-editor-color-cycle-section" style="display:none">
-                    <div class="form-group">
-                        <div class="label-row">
-                            <label data-i18n="color_strip.color_cycle.colors">Colors:</label>
-                            <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
-                        </div>
-                        <small class="input-hint" style="display:none" data-i18n="color_strip.color_cycle.colors.hint">Colors to cycle through smoothly. At least 2 required.</small>
-                        <div id="color-cycle-colors-list"></div>
-                    </div>
-                </div>
-
                 <!-- Gradient-specific fields -->
                 <div id="css-editor-gradient-section" style="display:none">
                     <div class="form-group">
@@ -542,15 +529,6 @@
 
                 <!-- Daylight Cycle section -->
                 <div id="css-editor-daylight-section" style="display:none">
-                    <div id="css-editor-daylight-speed-group" class="form-group">
-                        <div class="label-row">
-                            <label for="css-editor-daylight-speed"><span data-i18n="color_strip.daylight.speed">Speed:</span> <span id="css-editor-daylight-speed-val">1.0</span></label>
-                            <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
-                        </div>
-                        <small class="input-hint" style="display:none" data-i18n="color_strip.daylight.speed.hint">Cycle speed multiplier. 1.0 = full day/night cycle in ~4 minutes. Higher values cycle faster.</small>
-                        <input type="range" id="css-editor-daylight-speed" min="0.1" max="10" step="0.1" value="1.0"
-                            oninput="document.getElementById('css-editor-daylight-speed-val').textContent = parseFloat(this.value).toFixed(1)">
-                    </div>
                     <div class="form-group">
                         <div class="label-row">
                             <label for="css-editor-daylight-real-time" data-i18n="color_strip.daylight.use_real_time">Use Real Time:</label>
@@ -562,12 +540,21 @@
                             <span class="toggle-slider"></span>
                         </label>
                     </div>
+                    <div id="css-editor-daylight-speed-group" class="form-group">
+                        <div class="label-row">
+                            <label for="css-editor-daylight-speed"><span data-i18n="color_strip.daylight.speed">Speed:</span> <span id="css-editor-daylight-speed-val">1.0</span></label>
+                            <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
+                        </div>
+                        <small class="input-hint" style="display:none" data-i18n="color_strip.daylight.speed.hint">Cycle speed multiplier. 1.0 = full day/night cycle in ~4 minutes. Higher values cycle faster.</small>
+                        <input type="range" id="css-editor-daylight-speed" min="0.1" max="10" step="0.1" value="1.0"
+                            oninput="document.getElementById('css-editor-daylight-speed-val').textContent = parseFloat(this.value).toFixed(1)">
+                    </div>
                     <div class="form-group">
                         <div class="label-row">
                             <label for="css-editor-daylight-latitude"><span data-i18n="color_strip.daylight.latitude">Latitude:</span> <span id="css-editor-daylight-latitude-val">50</span>&deg;</label>
                             <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
                         </div>
-                        <small class="input-hint" style="display:none" data-i18n="color_strip.daylight.latitude.hint">Your geographic latitude (-90 to 90). Affects sunrise/sunset timing in real-time mode.</small>
+                        <small class="input-hint" style="display:none" data-i18n="color_strip.daylight.latitude.hint">Your geographic latitude (-90 to 90). Steepens or flattens the sunrise/sunset edges of the cycle.</small>
                         <input type="range" id="css-editor-daylight-latitude" min="-90" max="90" step="1" value="50"
                             oninput="document.getElementById('css-editor-daylight-latitude-val').textContent = parseInt(this.value)">
                     </div>
@@ -576,7 +563,7 @@
                             <label for="css-editor-daylight-longitude"><span data-i18n="color_strip.daylight.longitude">Longitude:</span> <span id="css-editor-daylight-longitude-val">0</span>&deg;</label>
                             <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
                         </div>
-                        <small class="input-hint" style="display:none" data-i18n="color_strip.daylight.longitude.hint">Your geographic longitude (-180 to 180). Adjusts solar noon offset for accurate sunrise/sunset timing.</small>
+                        <small class="input-hint" style="display:none" data-i18n="color_strip.daylight.longitude.hint">Your geographic longitude (-180 to 180). Shifts solar noon for accurate sunrise/sunset alignment with your wall clock.</small>
                         <input type="range" id="css-editor-daylight-longitude" min="-180" max="180" step="1" value="0"
                             oninput="document.getElementById('css-editor-daylight-longitude-val').textContent = parseInt(this.value)">
                     </div>
@@ -832,7 +819,7 @@
                     <small id="css-editor-animation-type-desc" class="field-desc"></small>
                 </div>
 
-                <!-- Sync Clock (shown for animated types: static, gradient, color_cycle, effect) -->
+                <!-- Sync Clock (shown for animated types: static, gradient, effect) -->
                 <div id="css-editor-clock-group" class="form-group" style="display:none">
                     <div class="label-row">
                         <label for="css-editor-clock" data-i18n="color_strip.clock">Sync Clock:</label>

server/src/ledgrab/templates/modals/settings.html

@@ -136,6 +136,17 @@
                                 </div>
                             </div>
 
+                            <div class="form-group">
+                                <div class="label-row">
+                                    <label for="settings-daylight-timezone" data-i18n="settings.daylight_timezone.label">Daylight timezone</label>
+                                    <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?">?</button>
+                                </div>
+                                <small class="input-hint" style="display:none" data-i18n="settings.daylight_timezone.hint">IANA timezone every "real-time" daylight cycle reads its wall clock in. Empty (default) uses the server's system timezone.</small>
+                                <div class="tz-picker-wrap">
+                                    <select id="settings-daylight-timezone"></select>
+                                </div>
+                            </div>
+
                             <div class="save-bar" id="settings-external-url-save-bar" hidden>
                                 <div class="save-bar-msg">
                                     <span data-i18n="settings.save_bar.unsaved">Unsaved changes in</span>
@@ -618,10 +629,6 @@
                 <span class="rn-eyebrow__sep" aria-hidden="true"></span>
                 <span class="rn-eyebrow__channel" id="release-notes-channel">CHANGELOG</span>
             </div>
-            <h2 class="rn-title">
-                <span class="rn-title__main" id="release-notes-name">Release Notes</span>
-                <em class="rn-title__accent" id="release-notes-version" hidden></em>
-            </h2>
             <div class="rn-meta" id="release-notes-meta" hidden>
                 <span class="rn-chip" id="release-notes-tag-chip" hidden>
                     <span class="rn-chip__dot" aria-hidden="true"></span>

server/src/ledgrab/templates/modals/test-template.html

@@ -15,9 +15,9 @@
                 </div>
                 <div class="ds-section-body">
                     <div class="form-group">
-                        <label data-i18n="templates.test.display">Display:</label>
+                        <label id="test-template-display-label" data-i18n="templates.test.display">Display:</label>
                         <input type="hidden" id="test-template-display" value="">
-                        <button type="button" class="btn btn-display-picker" id="test-display-picker-btn" onclick="openDisplayPicker(onTestDisplaySelected, document.getElementById('test-template-display').value, window._engineHasOwnDisplays?.(window.currentTestingTemplate?.engine_type) ? window.currentTestingTemplate.engine_type : null)">
+                        <button type="button" class="btn btn-display-picker" id="test-display-picker-btn" onclick="openTestDisplayPicker()">
                             <span id="test-display-picker-label" data-i18n="displays.picker.select">Select display...</span>
                         </button>
                     </div>

server/src/ledgrab/templates/modals/value-source-editor.html

@@ -257,6 +257,18 @@
 
                 <!-- Daylight fields -->
                 <div id="value-source-daylight-section" style="display:none">
+                    <div class="form-group">
+                        <div class="label-row">
+                            <label for="value-source-daylight-real-time" data-i18n="value_source.daylight.use_real_time">Use Real Time:</label>
+                            <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
+                        </div>
+                        <small class="input-hint" style="display:none" data-i18n="value_source.daylight.use_real_time.hint">When enabled, the value follows the actual time of day. Speed is ignored.</small>
+                        <label class="toggle-switch">
+                            <input type="checkbox" id="value-source-daylight-real-time" onchange="onDaylightVSRealTimeChange()">
+                            <span class="toggle-slider"></span>
+                        </label>
+                    </div>
+
                     <div id="value-source-daylight-speed-group" class="form-group">
                         <div class="label-row">
                             <label for="value-source-daylight-speed"><span data-i18n="value_source.daylight.speed">Speed:</span> <span id="value-source-daylight-speed-display">1.0</span></label>
@@ -269,24 +281,22 @@
 
                     <div class="form-group">
                         <div class="label-row">
-                            <label for="value-source-daylight-real-time" data-i18n="value_source.daylight.use_real_time">Use Real Time:</label>
+                            <label for="value-source-daylight-latitude"><span data-i18n="value_source.daylight.latitude">Latitude:</span> <span id="value-source-daylight-latitude-display">50</span>&deg;</label>
                             <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
                         </div>
-                        <small class="input-hint" style="display:none" data-i18n="value_source.daylight.use_real_time.hint">When enabled, brightness follows the actual time of day. Speed is ignored.</small>
-                        <label class="toggle-label">
-                            <input type="checkbox" id="value-source-daylight-real-time" onchange="onDaylightVSRealTimeChange()">
-                            <span data-i18n="value_source.daylight.enable_real_time">Follow wall clock</span>
-                        </label>
+                        <small class="input-hint" style="display:none" data-i18n="value_source.daylight.latitude.hint">Your geographic latitude (-90 to 90). Steepens or flattens the sunrise/sunset edges of the cycle.</small>
+                        <input type="range" id="value-source-daylight-latitude" min="-90" max="90" step="1" value="50"
+                            oninput="document.getElementById('value-source-daylight-latitude-display').textContent = parseInt(this.value)">
                     </div>
 
                     <div class="form-group">
                         <div class="label-row">
-                            <label for="value-source-daylight-latitude"><span data-i18n="value_source.daylight.latitude">Latitude:</span> <span id="value-source-daylight-latitude-display">50</span>&deg;</label>
+                            <label for="value-source-daylight-longitude"><span data-i18n="value_source.daylight.longitude">Longitude:</span> <span id="value-source-daylight-longitude-display">0</span>&deg;</label>
                             <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
                         </div>
-                        <small class="input-hint" style="display:none" data-i18n="value_source.daylight.latitude.hint">Your geographic latitude (-90 to 90). Affects sunrise/sunset timing in real-time mode.</small>
-                        <input type="range" id="value-source-daylight-latitude" min="-90" max="90" step="1" value="50"
-                            oninput="document.getElementById('value-source-daylight-latitude-display').textContent = parseInt(this.value)">
+                        <small class="input-hint" style="display:none" data-i18n="value_source.daylight.longitude.hint">Your geographic longitude (-180 to 180). Shifts solar noon for accurate sunrise/sunset alignment with your wall clock.</small>
+                        <input type="range" id="value-source-daylight-longitude" min="-180" max="180" step="1" value="0"
+                            oninput="document.getElementById('value-source-daylight-longitude-display').textContent = parseInt(this.value)">
                     </div>
                 </div>
 
@@ -306,8 +316,7 @@
                         <div class="label-row">
                             <label data-i18n="value_source.animated_color.colors">Colors:</label>
                         </div>
-                        <div id="value-source-animated-color-list"></div>
-                        <button type="button" class="btn btn-sm" onclick="addAnimatedColor()">+ Add Color</button>
+                        <div id="value-source-animated-color-list" class="animated-color-row" role="list"></div>
                     </div>
                     <div class="form-group">
                         <div class="label-row">
@@ -326,8 +335,20 @@
                         <select id="value-source-animated-color-easing">
                             <option value="linear">Linear</option>
                             <option value="step">Step</option>
+                            <option value="ease_in">Ease In</option>
+                            <option value="ease_out">Ease Out</option>
+                            <option value="ease_in_out">Ease In Out</option>
+                            <option value="sine">Sine</option>
                         </select>
                     </div>
+                    <div class="form-group">
+                        <div class="label-row">
+                            <label for="value-source-animated-color-clock" data-i18n="value_source.animated_color.clock">Animation Clock:</label>
+                            <button type="button" class="hint-toggle" onclick="toggleHint(this)" title="?" data-i18n-aria-label="aria.hint">?</button>
+                        </div>
+                        <small class="input-hint" style="display:none" data-i18n="value_source.animated_color.clock.hint">Optional sync clock — when set, the clock controls timing (its speed multiplier scales the cpm above) and pause state. Leave empty to run on the value source's own speed.</small>
+                        <select id="value-source-animated-color-clock"></select>
+                    </div>
                 </div>
 
                 <!-- Adaptive Time Color fields -->

server/src/ledgrab/templates/partials/display-picker.html

@@ -1,10 +1,46 @@
-<!-- Display Picker Lightbox -->
-<div id="display-picker-lightbox" class="lightbox" onclick="closeDisplayPicker(event)">
-    <button class="lightbox-close" onclick="closeDisplayPicker()" title="Close">&#x2715;</button>
+<!--
+    Display Picker Lightbox — Lumenworks studio-console shell.
+
+    Channel: cyan (sources / screen). Re-uses the .lightbox shell tokens
+    in modal.css; .lightbox-bracket-br paints the second silkscreen
+    corner (top-left bracket comes from .lightbox-content::after).
+
+    The header rack (eyebrow + display title) and the optional foot key
+    hint are scoped to .display-picker-content so the image lightbox
+    keeps its minimal, image-first layout.
+
+    Title is split into a static lead word ("Select") and a channel-tinted
+    accent ("Display" / "Device"); displays.ts swaps the accent + eyebrow
+    channel label depending on whether we are picking a monitor or an
+    engine-owned device (camera, scrcpy).
+-->
+<div id="display-picker-lightbox" class="lightbox" data-ch="cyan" onclick="closeDisplayPicker(event)">
     <div class="lightbox-content display-picker-content">
-        <h3 class="display-picker-title" data-i18n="displays.picker.title">Select a Display</h3>
+        <span class="lightbox-bracket-br" aria-hidden="true"></span>
+        <button class="lightbox-close" type="button" onclick="closeDisplayPicker()" title="Close" data-i18n-aria-label="aria.close">&#x2715;</button>
+
+        <header class="display-picker-head">
+            <div class="display-picker-lede">
+                <div class="display-picker-eyebrow" aria-hidden="true">
+                    <span class="display-picker-eyebrow__dot"></span>
+                    <span data-role="label" data-i18n="displays.picker.eyebrow.label">Source</span>
+                    <span class="display-picker-eyebrow__sep"></span>
+                    <span class="display-picker-eyebrow__channel" data-i18n="displays.picker.eyebrow.channel">Display · Map</span>
+                </div>
+                <h2 class="display-picker-title" id="display-picker-title">
+                    <span data-role="lead" data-i18n="displays.picker.title.lead">Select</span>
+                    <em class="display-picker-title__accent" data-i18n="displays.picker.title.accent">Display</em>
+                </h2>
+            </div>
+        </header>
+
         <div id="display-picker-canvas" class="display-picker-canvas">
             <div class="loading-spinner"></div>
         </div>
+
+        <footer class="display-picker-foot" aria-hidden="true">
+            <span><kbd>esc</kbd><span data-i18n="displays.picker.foot.dismiss">dismiss</span></span>
+            <span><kbd>click</kbd><span data-role="select" data-i18n="displays.picker.foot.select">select monitor</span></span>
+        </footer>
     </div>
 </div>

server/src/ledgrab/templates/partials/image-lightbox.html

@@ -1,7 +1,14 @@
-<!-- Image Lightbox -->
-<div id="image-lightbox" class="lightbox" onclick="closeLightbox(event)">
-    <button class="lightbox-close" onclick="closeLightbox()" title="Close">&#x2715;</button>
+<!--
+    Image Lightbox — Lumenworks studio-console shell, minimal variant.
+
+    Channel: cyan (preview / screen-capture). The shell is shared with
+    the display picker (see modal.css). Image is the hero so we skip the
+    big head and only keep the close button + readout strip.
+-->
+<div id="image-lightbox" class="lightbox" data-ch="cyan" onclick="closeLightbox(event)">
     <div class="lightbox-content">
+        <span class="lightbox-bracket-br" aria-hidden="true"></span>
+        <button class="lightbox-close" type="button" onclick="closeLightbox()" title="Close" data-i18n-aria-label="aria.close">&#x2715;</button>
         <img id="lightbox-image" src="" alt="Full size preview">
         <div id="lightbox-stats" class="lightbox-stats" style="display: none;"></div>
     </div>

server/tests/e2e/test_color_strip_flow.py

@@ -135,22 +135,6 @@ class TestColorStripSourceLifecycle:
         resp = client.post("/api/v1/color-strip-sources", json=payload)
         assert resp.status_code == 400  # duplicate name
 
-    def test_color_cycle_source(self, client):
-        """Color cycle sources store and return their color list."""
-        resp = client.post(
-            "/api/v1/color-strip-sources",
-            json={
-                "name": "Rainbow Cycle",
-                "source_type": "color_cycle",
-                "colors": [[255, 0, 0], [0, 255, 0], [0, 0, 255]],
-                "led_count": 30,
-            },
-        )
-        assert resp.status_code == 201
-        data = resp.json()
-        assert data["source_type"] == "color_cycle"
-        assert data["colors"] == [[255, 0, 0], [0, 255, 0], [0, 0, 255]]
-
     def test_effect_source(self, client):
         """Effect sources store their effect parameters."""
         resp = client.post(

server/tests/test_camera_engine.py

@@ -0,0 +1,303 @@
+"""Tests for the camera capture engine — focus on resolution selection logic.
+
+The probe-for-max behavior in ``_enumerate_cameras`` and the resolution
+priority logic in ``CameraCaptureStream.initialize`` are exercised here
+without requiring a real webcam, by stubbing ``cv2.VideoCapture``.
+"""
+
+from __future__ import annotations
+
+import sys
+import types
+from typing import Any, Dict, List, Tuple
+
+import pytest
+
+from ledgrab.core.capture_engines import camera_engine as ce
+
+
+# ---------------------------------------------------------------------------
+# _parse_resolution — pure function, no stubs needed
+# ---------------------------------------------------------------------------
+
+
+@pytest.mark.parametrize(
+    "value,expected",
+    [
+        ("auto", None),
+        ("AUTO", None),
+        ("", None),
+        (None, None),
+        (0, None),
+        ("1920x1080", (1920, 1080)),
+        ("1920X1080", (1920, 1080)),
+        ("2560×1440", (2560, 1440)),  # unicode multiplication sign
+        ("  1280x720  ", (1280, 720)),
+        ("garbage", None),
+        ("1920x", None),
+        ("0x0", None),
+        ("-1x100", None),
+    ],
+)
+def test_parse_resolution(value: Any, expected: Tuple[int, int] | None) -> None:
+    assert ce._parse_resolution(value) == expected
+
+
+# ---------------------------------------------------------------------------
+# Stubs that emulate cv2.VideoCapture without needing a real camera
+# ---------------------------------------------------------------------------
+
+
+CAP_PROP_FRAME_WIDTH = 3
+CAP_PROP_FRAME_HEIGHT = 4
+CAP_PROP_FPS = 5
+
+
+class _StubCap:
+    """Minimal cv2.VideoCapture stand-in.
+
+    - ``default_dims``: what get() returns immediately after open.
+    - ``max_dims``: what set(9999) clamps to (the camera's hardware ceiling).
+    - ``set()`` honors any width/height up to ``max_dims`` and clamps higher.
+    """
+
+    def __init__(
+        self,
+        default_dims: Tuple[int, int],
+        max_dims: Tuple[int, int],
+        opened: bool = True,
+    ):
+        self._default = default_dims
+        self._max = max_dims
+        self._w, self._h = default_dims
+        self._opened = opened
+        self.read_calls = 0
+        self.set_calls: List[Tuple[int, float]] = []
+
+    def isOpened(self) -> bool:
+        return self._opened
+
+    def get(self, prop: int) -> float:
+        if prop == CAP_PROP_FRAME_WIDTH:
+            return float(self._w)
+        if prop == CAP_PROP_FRAME_HEIGHT:
+            return float(self._h)
+        if prop == CAP_PROP_FPS:
+            return 30.0
+        return 0.0
+
+    def set(self, prop: int, value: float) -> bool:
+        self.set_calls.append((prop, value))
+        if prop == CAP_PROP_FRAME_WIDTH:
+            self._w = int(min(value, self._max[0]))
+        elif prop == CAP_PROP_FRAME_HEIGHT:
+            self._h = int(min(value, self._max[1]))
+        return True
+
+    def read(self):
+        self.read_calls += 1
+        # Return a 3-channel frame of the current size as a list of zeros —
+        # the engine only inspects shape[:2].
+        import numpy as np
+
+        return True, np.zeros((self._h, self._w, 3), dtype=np.uint8)
+
+    def release(self) -> None:
+        self._opened = False
+
+
+def _install_cv2_stub(monkeypatch: pytest.MonkeyPatch, factory) -> List[_StubCap]:
+    """Install a fake `cv2` module so the engine code can `import cv2`.
+
+    `factory(index, backend) -> _StubCap` produces a stub for each open call.
+    Returns the list that all created stubs are appended to (for assertions).
+    """
+    created: List[_StubCap] = []
+
+    def _video_capture(index, backend=None):
+        cap = factory(index, backend)
+        created.append(cap)
+        return cap
+
+    fake_cv2 = types.SimpleNamespace(
+        VideoCapture=_video_capture,
+        CAP_PROP_FRAME_WIDTH=CAP_PROP_FRAME_WIDTH,
+        CAP_PROP_FRAME_HEIGHT=CAP_PROP_FRAME_HEIGHT,
+        CAP_PROP_FPS=CAP_PROP_FPS,
+        COLOR_BGR2RGB=4,
+        cvtColor=lambda frame, _flag: frame,  # passthrough
+    )
+    monkeypatch.setitem(sys.modules, "cv2", fake_cv2)
+    # Also bypass the SetupAPI friendly-name probe (Windows-only ctypes call)
+    monkeypatch.setattr(ce, "_get_camera_friendly_names", lambda: {0: "Stub Cam"})
+    # Reset the enumeration cache so each test sees a fresh probe
+    ce._camera_cache = None
+    ce._camera_cache_time = 0
+    ce._active_cv2_indices.clear()
+    return created
+
+
+# ---------------------------------------------------------------------------
+# _enumerate_cameras — probe-for-max
+# ---------------------------------------------------------------------------
+
+
+def test_enumerate_reports_camera_max_not_default(monkeypatch: pytest.MonkeyPatch) -> None:
+    """A camera whose default mode is 640x480 but max is 2560x1440 should be
+    reported at its max — that's what shows up in the display selector."""
+
+    def factory(index, _backend):
+        if index == 0:
+            return _StubCap(default_dims=(640, 480), max_dims=(2560, 1440))
+        return _StubCap(default_dims=(0, 0), max_dims=(0, 0), opened=False)
+
+    _install_cv2_stub(monkeypatch, factory)
+
+    cams = ce._enumerate_cameras("auto")
+
+    assert len(cams) == 1
+    assert cams[0]["width"] == 2560
+    assert cams[0]["height"] == 1440
+    assert cams[0]["name"] == "Stub Cam"
+
+
+def test_enumerate_falls_back_when_probe_rejected(monkeypatch: pytest.MonkeyPatch) -> None:
+    """If a driver rejects the probe set() with an exception, fall back to the
+    default mode rather than reporting 0x0."""
+
+    class _RejectingCap(_StubCap):
+        def set(self, prop: int, value: float) -> bool:
+            raise RuntimeError("driver hates large values")
+
+    def factory(index, _backend):
+        if index == 0:
+            return _RejectingCap(default_dims=(800, 600), max_dims=(800, 600))
+        return _StubCap(default_dims=(0, 0), max_dims=(0, 0), opened=False)
+
+    _install_cv2_stub(monkeypatch, factory)
+
+    cams = ce._enumerate_cameras("auto")
+
+    assert len(cams) == 1
+    assert cams[0]["width"] == 800
+    assert cams[0]["height"] == 600
+
+
+# ---------------------------------------------------------------------------
+# CameraCaptureStream.initialize — resolution selection priority
+# ---------------------------------------------------------------------------
+
+
+def _open_stream_with_config(
+    monkeypatch: pytest.MonkeyPatch,
+    config: Dict[str, Any],
+    cam_max: Tuple[int, int] = (2560, 1440),
+) -> Tuple[ce.CameraCaptureStream, List[_StubCap]]:
+    def factory(index, _backend):
+        if index == 0:
+            return _StubCap(default_dims=(640, 480), max_dims=cam_max)
+        return _StubCap(default_dims=(0, 0), max_dims=(0, 0), opened=False)
+
+    created = _install_cv2_stub(monkeypatch, factory)
+    stream = ce.CameraCaptureStream(display_index=0, config=config)
+    stream.initialize()
+    return stream, created
+
+
+def _set_calls_for_size(cap: _StubCap) -> List[Tuple[int, float]]:
+    return [c for c in cap.set_calls if c[0] in (CAP_PROP_FRAME_WIDTH, CAP_PROP_FRAME_HEIGHT)]
+
+
+def test_init_default_auto_opens_at_max(monkeypatch: pytest.MonkeyPatch) -> None:
+    """No resolution config = open at camera max via _PROBE_MAX_DIM."""
+    stream, created = _open_stream_with_config(monkeypatch, config={})
+    # Two caps: one for enumeration probe, one for the stream's own open.
+    assert len(created) >= 2
+    stream_cap = created[-1]
+    size_sets = _set_calls_for_size(stream_cap)
+    # Stream should request the max-probe sentinel for both width and height.
+    assert (CAP_PROP_FRAME_WIDTH, float(ce._PROBE_MAX_DIM)) in size_sets
+    assert (CAP_PROP_FRAME_HEIGHT, float(ce._PROBE_MAX_DIM)) in size_sets
+
+
+def test_init_resolution_auto_opens_at_max(monkeypatch: pytest.MonkeyPatch) -> None:
+    stream, created = _open_stream_with_config(monkeypatch, config={"resolution": "auto"})
+    stream_cap = created[-1]
+    size_sets = _set_calls_for_size(stream_cap)
+    assert (CAP_PROP_FRAME_WIDTH, float(ce._PROBE_MAX_DIM)) in size_sets
+    assert (CAP_PROP_FRAME_HEIGHT, float(ce._PROBE_MAX_DIM)) in size_sets
+
+
+def test_init_explicit_resolution_string(monkeypatch: pytest.MonkeyPatch) -> None:
+    stream, created = _open_stream_with_config(monkeypatch, config={"resolution": "1280x720"})
+    stream_cap = created[-1]
+    size_sets = _set_calls_for_size(stream_cap)
+    assert (CAP_PROP_FRAME_WIDTH, 1280.0) in size_sets
+    assert (CAP_PROP_FRAME_HEIGHT, 720.0) in size_sets
+    # Should not request the max sentinel when an explicit size is given.
+    assert (CAP_PROP_FRAME_WIDTH, float(ce._PROBE_MAX_DIM)) not in size_sets
+
+
+def test_init_legacy_numeric_keys_take_precedence(monkeypatch: pytest.MonkeyPatch) -> None:
+    """Stored configs from before the rename still work and override the
+    new `resolution` field."""
+    stream, created = _open_stream_with_config(
+        monkeypatch,
+        config={
+            "resolution": "1920x1080",
+            "resolution_width": 1280,
+            "resolution_height": 720,
+        },
+    )
+    stream_cap = created[-1]
+    size_sets = _set_calls_for_size(stream_cap)
+    assert (CAP_PROP_FRAME_WIDTH, 1280.0) in size_sets
+    assert (CAP_PROP_FRAME_HEIGHT, 720.0) in size_sets
+    # `resolution` should be ignored when legacy numeric keys are set.
+    assert (CAP_PROP_FRAME_WIDTH, 1920.0) not in size_sets
+
+
+def test_init_legacy_zeroes_fall_through_to_resolution(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """Legacy keys with value 0 are the historical 'no override' state — they
+    should fall through to the new `resolution` field."""
+    stream, created = _open_stream_with_config(
+        monkeypatch,
+        config={
+            "resolution": "1280x720",
+            "resolution_width": 0,
+            "resolution_height": 0,
+        },
+    )
+    stream_cap = created[-1]
+    size_sets = _set_calls_for_size(stream_cap)
+    assert (CAP_PROP_FRAME_WIDTH, 1280.0) in size_sets
+    assert (CAP_PROP_FRAME_HEIGHT, 720.0) in size_sets
+
+
+# ---------------------------------------------------------------------------
+# Engine class surface — config defaults and choices
+# ---------------------------------------------------------------------------
+
+
+def test_default_config_exposes_resolution() -> None:
+    cfg = ce.CameraEngine.get_default_config()
+    assert cfg["resolution"] == "auto"
+    # Legacy numeric keys are no longer surfaced — UI shouldn't render them.
+    assert "resolution_width" not in cfg
+    assert "resolution_height" not in cfg
+
+
+def test_config_choices_include_resolution_presets() -> None:
+    choices = ce.CameraEngine.get_config_choices()
+    assert "resolution" in choices
+    # Exact set: auto + the 5 standard sizes the UI lists.
+    assert choices["resolution"] == [
+        "auto",
+        "640x480",
+        "1280x720",
+        "1920x1080",
+        "2560x1440",
+        "3840x2160",
+    ]