Add BetterCam engine, UI polish, and bug fixes

- Add BetterCam capture engine (DXGI Desktop Duplication, priority 4)
- Fix missing picture_stream_id in get_device endpoint
- Fix template delete validation to check streams instead of devices
- Add description field to capture engine template UI
- Default template name changed to "Default" with descriptive text
- Display picker highlights selected display instead of primary
- Fix modals closing when dragging text selection outside dialog
- Rename "Engine Configuration" to "Configuration", hide when empty
- Rename "Run Test" to "Run" across all test buttons
- Always reserve space for vertical scrollbar
- Redesign Stream Settings info panel with pill-style props
- Fix processed stream showing internal ID instead of stream name
- Update en/ru locale files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/wled_controller/api/routes.py

@@ -389,6 +389,7 @@ async def get_device(
         ),
         calibration=CalibrationSchema(**calibration_to_dict(device.calibration)),
         capture_template_id=device.capture_template_id,
+        picture_stream_id=device.picture_stream_id,
         created_at=device.created_at,
         updated_at=device.updated_at,
     )
@@ -918,25 +919,25 @@ async def delete_template(
     template_id: str,
     _auth: AuthRequired,
     template_store: TemplateStore = Depends(get_template_store),
-    device_store: DeviceStore = Depends(get_device_store),
+    stream_store: PictureStreamStore = Depends(get_picture_stream_store),
 ):
     """Delete a template.
 
-    Validates that no devices are currently using this template before deletion.
+    Validates that no streams are currently using this template before deletion.
     """
     try:
-        # Check if any devices are using this template
-        devices_using_template = []
-        for device in device_store.get_all_devices():
-            if device.capture_template_id == template_id:
-                devices_using_template.append(device.name)
+        # Check if any streams are using this template
+        streams_using_template = []
+        for stream in stream_store.get_all_streams():
+            if stream.capture_template_id == template_id:
+                streams_using_template.append(stream.name)
 
-        if devices_using_template:
-            device_list = ", ".join(devices_using_template)
+        if streams_using_template:
+            stream_list = ", ".join(streams_using_template)
             raise HTTPException(
                 status_code=409,
-                detail=f"Cannot delete template: it is currently assigned to the following device(s): {device_list}. "
-                       f"Please reassign these devices to a different template before deleting."
+                detail=f"Cannot delete template: it is used by the following stream(s): {stream_list}. "
+                       f"Please reassign these streams to a different template before deleting."
             )
 
         # Proceed with deletion
@@ -1036,6 +1037,10 @@ async def test_template(
             screen_capture = engine.capture_display(test_request.display_index)
             capture_elapsed = time.perf_counter() - capture_start
 
+            # Skip if no new frame (screen unchanged)
+            if screen_capture is None:
+                continue
+
             total_capture_time += capture_elapsed
             frame_count += 1
             last_frame = screen_capture
@@ -1354,6 +1359,9 @@ async def test_pp_template(
                 screen_capture = engine.capture_display(display_index)
                 capture_elapsed = time.perf_counter() - capture_start
 
+                if screen_capture is None:
+                    continue
+
                 total_capture_time += capture_elapsed
                 frame_count += 1
                 last_frame = screen_capture
@@ -1739,6 +1747,9 @@ async def test_picture_stream(
                 screen_capture = engine.capture_display(display_index)
                 capture_elapsed = time.perf_counter() - capture_start
 
+                if screen_capture is None:
+                    continue
+
                 total_capture_time += capture_elapsed
                 frame_count += 1
                 last_frame = screen_capture

server/src/wled_controller/core/capture_engines/__init__.py

@@ -8,11 +8,13 @@ from wled_controller.core.capture_engines.base import (
 from wled_controller.core.capture_engines.factory import EngineRegistry
 from wled_controller.core.capture_engines.mss_engine import MSSEngine
 from wled_controller.core.capture_engines.dxcam_engine import DXcamEngine
+from wled_controller.core.capture_engines.bettercam_engine import BetterCamEngine
 from wled_controller.core.capture_engines.wgc_engine import WGCEngine
 
 # Auto-register available engines
 EngineRegistry.register(MSSEngine)
 EngineRegistry.register(DXcamEngine)
+EngineRegistry.register(BetterCamEngine)
 EngineRegistry.register(WGCEngine)
 
 __all__ = [
@@ -22,5 +24,6 @@ __all__ = [
     "EngineRegistry",
     "MSSEngine",
     "DXcamEngine",
+    "BetterCamEngine",
     "WGCEngine",
 ]

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

@@ -2,7 +2,7 @@
 
 from abc import ABC, abstractmethod
 from dataclasses import dataclass
-from typing import Any, Dict, List
+from typing import Any, Dict, List, Optional
 
 import numpy as np
 
@@ -84,14 +84,15 @@ class CaptureEngine(ABC):
         pass
 
     @abstractmethod
-    def capture_display(self, display_index: int) -> ScreenCapture:
+    def capture_display(self, display_index: int) -> Optional[ScreenCapture]:
         """Capture the specified display.
 
         Args:
             display_index: Index of display to capture (0-based)
 
         Returns:
-            ScreenCapture object with image data as numpy array (RGB format)
+            ScreenCapture object with image data as numpy array (RGB format),
+            or None if no new frame is available (screen unchanged).
 
         Raises:
             ValueError: If display_index is invalid

server/src/wled_controller/core/capture_engines/bettercam_engine.py

@@ -0,0 +1,236 @@
+"""BetterCam-based screen capture engine (Windows only, DXGI Desktop Duplication)."""
+
+import sys
+from typing import Any, Dict, List, Optional
+
+import numpy as np
+
+from wled_controller.core.capture_engines.base import (
+    CaptureEngine,
+    DisplayInfo,
+    ScreenCapture,
+)
+from wled_controller.utils import get_logger
+
+logger = get_logger(__name__)
+
+
+class BetterCamEngine(CaptureEngine):
+    """BetterCam-based screen capture engine.
+
+    Uses the bettercam library (a high-performance fork of DXCam) which leverages
+    DXGI Desktop Duplication API for ultra-fast screen capture on Windows.
+    Offers better performance than DXCam with multi-GPU support.
+
+    Requires: Windows 8.1+
+    """
+
+    ENGINE_TYPE = "bettercam"
+    ENGINE_PRIORITY = 4
+
+    def __init__(self, config: Dict[str, Any]):
+        """Initialize BetterCam engine."""
+        super().__init__(config)
+        self._camera = None
+        self._bettercam = None
+        self._current_output = None
+
+    def initialize(self) -> None:
+        """Initialize BetterCam capture.
+
+        Raises:
+            RuntimeError: If bettercam not installed or initialization fails
+        """
+        try:
+            import bettercam
+            self._bettercam = bettercam
+        except ImportError:
+            raise RuntimeError(
+                "BetterCam not installed. Install with: pip install bettercam"
+            )
+
+        self._initialized = True
+        logger.info("BetterCam engine initialized")
+
+    def _ensure_camera(self, display_index: int) -> None:
+        """Ensure camera is created for the requested display.
+
+        Creates or recreates the BetterCam camera if needed.
+        """
+        if self._camera and self._current_output == display_index:
+            return
+
+        # Stop and release existing camera
+        if self._camera:
+            try:
+                if self._camera.is_capturing:
+                    self._camera.stop()
+            except Exception:
+                pass
+            try:
+                self._camera.release()
+            except Exception:
+                pass
+            self._camera = None
+
+        # Clear global camera cache to avoid stale DXGI state
+        try:
+            self._bettercam.__factory.clean_up()
+        except Exception:
+            pass
+
+        self._camera = self._bettercam.create(
+            output_idx=display_index,
+            output_color="RGB",
+        )
+
+        if not self._camera:
+            raise RuntimeError(f"Failed to create BetterCam camera for display {display_index}")
+
+        self._current_output = display_index
+        logger.info(f"BetterCam camera created (output={display_index})")
+
+    def cleanup(self) -> None:
+        """Cleanup BetterCam resources."""
+        if self._camera:
+            try:
+                if self._camera.is_capturing:
+                    self._camera.stop()
+            except Exception:
+                pass
+            try:
+                self._camera.release()
+            except Exception as e:
+                logger.error(f"Error releasing BetterCam camera: {e}")
+            self._camera = None
+
+        # Clear global cache so next create() gets fresh DXGI state
+        if self._bettercam:
+            try:
+                self._bettercam.__factory.clean_up()
+            except Exception:
+                pass
+
+        self._current_output = None
+        self._initialized = False
+        logger.info("BetterCam engine cleaned up")
+
+    def get_available_displays(self) -> List[DisplayInfo]:
+        """Get list of available displays using BetterCam.
+
+        Returns:
+            List of DisplayInfo objects
+
+        Raises:
+            RuntimeError: If not initialized or detection fails
+        """
+        if not self._initialized:
+            raise RuntimeError("Engine not initialized")
+
+        try:
+            displays = []
+            output_idx = self._current_output or 0
+
+            if self._camera and hasattr(self._camera, "width") and hasattr(self._camera, "height"):
+                display_info = DisplayInfo(
+                    index=output_idx,
+                    name=f"BetterCam Display {output_idx}",
+                    width=self._camera.width,
+                    height=self._camera.height,
+                    x=0,
+                    y=0,
+                    is_primary=(output_idx == 0),
+                    refresh_rate=60,
+                )
+                displays.append(display_info)
+            else:
+                display_info = DisplayInfo(
+                    index=output_idx,
+                    name=f"BetterCam Display {output_idx}",
+                    width=1920,
+                    height=1080,
+                    x=0,
+                    y=0,
+                    is_primary=(output_idx == 0),
+                    refresh_rate=60,
+                )
+                displays.append(display_info)
+
+            logger.debug(f"BetterCam detected {len(displays)} display(s)")
+            return displays
+
+        except Exception as e:
+            logger.error(f"Failed to detect displays with BetterCam: {e}")
+            raise RuntimeError(f"Failed to detect displays: {e}")
+
+    def capture_display(self, display_index: int) -> Optional[ScreenCapture]:
+        """Capture display using BetterCam.
+
+        Args:
+            display_index: Index of display to capture (0-based).
+
+        Returns:
+            ScreenCapture object with image data, or None if screen unchanged.
+
+        Raises:
+            RuntimeError: If capture fails
+        """
+        # Auto-initialize if not already initialized
+        if not self._initialized:
+            self.initialize()
+
+        # Ensure camera is ready for the requested display
+        self._ensure_camera(display_index)
+
+        try:
+            # grab() uses AcquireNextFrame with timeout=0 (non-blocking).
+            # Returns None if screen content hasn't changed since last grab.
+            frame = self._camera.grab()
+
+            if frame is None:
+                return None
+
+            logger.debug(
+                f"BetterCam captured display {display_index}: "
+                f"{frame.shape[1]}x{frame.shape[0]}"
+            )
+
+            return ScreenCapture(
+                image=frame,
+                width=frame.shape[1],
+                height=frame.shape[0],
+                display_index=display_index,
+            )
+
+        except ValueError:
+            raise
+        except Exception as e:
+            logger.error(f"Failed to capture display {display_index} with BetterCam: {e}")
+            raise RuntimeError(f"Screen capture failed: {e}")
+
+    @classmethod
+    def is_available(cls) -> bool:
+        """Check if BetterCam is available.
+
+        BetterCam requires Windows 8.1+ and the bettercam package.
+
+        Returns:
+            True if bettercam is available on this system
+        """
+        if sys.platform != "win32":
+            return False
+
+        try:
+            import bettercam
+            return True
+        except ImportError:
+            return False
+
+    @classmethod
+    def get_default_config(cls) -> Dict[str, Any]:
+        """Get default BetterCam configuration.
+
+        Returns:
+            Default config dict with BetterCam options
+        """
+        return {}

server/src/wled_controller/core/capture_engines/dxcam_engine.py

@@ -1,8 +1,7 @@
 """DXcam-based screen capture engine (Windows only, DXGI Desktop Duplication)."""
 
 import sys
-import time
-from typing import Any, Dict, List
+from typing import Any, Dict, List, Optional
 
 import numpy as np
 
@@ -63,8 +62,13 @@ class DXcamEngine(CaptureEngine):
         if self._camera and self._current_output == display_index:
             return
 
-        # Release existing camera
+        # Stop and release existing camera
         if self._camera:
+            try:
+                if self._camera.is_capturing:
+                    self._camera.stop()
+            except Exception:
+                pass
             try:
                 self._camera.release()
             except Exception:
@@ -91,6 +95,11 @@ class DXcamEngine(CaptureEngine):
     def cleanup(self) -> None:
         """Cleanup DXcam resources."""
         if self._camera:
+            try:
+                if self._camera.is_capturing:
+                    self._camera.stop()
+            except Exception:
+                pass
             try:
                 self._camera.release()
             except Exception as e:
@@ -165,14 +174,14 @@ class DXcamEngine(CaptureEngine):
             logger.error(f"Failed to detect displays with DXcam: {e}")
             raise RuntimeError(f"Failed to detect displays: {e}")
 
-    def capture_display(self, display_index: int) -> ScreenCapture:
+    def capture_display(self, display_index: int) -> Optional[ScreenCapture]:
         """Capture display using DXcam.
 
         Args:
             display_index: Index of display to capture (0-based).
 
         Returns:
-            ScreenCapture object with image data
+            ScreenCapture object with image data, or None if screen unchanged.
 
         Raises:
             RuntimeError: If capture fails
@@ -185,21 +194,12 @@ class DXcamEngine(CaptureEngine):
         self._ensure_camera(display_index)
 
         try:
-            # Grab frame from DXcam (one-shot mode, no start() needed).
-            # First grab after create() often returns None as DXGI Desktop
-            # Duplication needs a frame change to capture. Retry a few times.
-            frame = None
-            for attempt in range(5):
-                frame = self._camera.grab()
-                if frame is not None:
-                    break
-                time.sleep(0.05)
+            # grab() uses AcquireNextFrame with timeout=0 (non-blocking).
+            # Returns None if screen content hasn't changed since last grab.
+            frame = self._camera.grab()
 
             if frame is None:
-                raise RuntimeError(
-                    "Failed to capture frame after retries. "
-                    "The screen may not have changed or the display is unavailable."
-                )
+                return None
 
             # DXcam returns numpy array directly in configured color format
             logger.debug(

server/src/wled_controller/core/processor_manager.py

@@ -555,6 +555,11 @@ class ProcessorManager:
                             display_index
                         )
 
+                    # Skip processing if no new frame (screen unchanged)
+                    if capture is None:
+                        await asyncio.sleep(frame_time)
+                        continue
+
                     # Apply postprocessing filters to the full captured image
                     if filter_objects:
                         capture.image = await asyncio.to_thread(_apply_filters, capture.image)

server/src/wled_controller/static/app.js

@@ -2,6 +2,25 @@ const API_BASE = '/api/v1';
 let refreshInterval = null;
 let apiKey = null;
 
+// Backdrop click helper: only closes modal if both mousedown and mouseup were on the backdrop itself.
+// Prevents accidental close when user drags text selection outside the dialog.
+function setupBackdropClose(modal, closeFn) {
+    // Guard against duplicate listeners when called on every modal open
+    if (modal._backdropCloseSetup) {
+        modal._backdropCloseFn = closeFn;
+        return;
+    }
+    modal._backdropCloseFn = closeFn;
+    let mouseDownTarget = null;
+    modal.addEventListener('mousedown', (e) => { mouseDownTarget = e.target; });
+    modal.addEventListener('mouseup', (e) => {
+        if (mouseDownTarget === modal && e.target === modal && modal._backdropCloseFn) modal._backdropCloseFn();
+        mouseDownTarget = null;
+    });
+    modal.onclick = null;
+    modal._backdropCloseSetup = true;
+}
+
 // Track logged errors to avoid console spam
 const loggedErrors = new Map(); // deviceId -> { errorCount, lastError }
 
@@ -90,9 +109,11 @@ document.addEventListener('keydown', (e) => {
 
 // Display picker lightbox
 let _displayPickerCallback = null;
+let _displayPickerSelectedIndex = null;
 
-function openDisplayPicker(callback) {
+function openDisplayPicker(callback, selectedIndex) {
     _displayPickerCallback = callback;
+    _displayPickerSelectedIndex = (selectedIndex !== undefined && selectedIndex !== null && selectedIndex !== '') ? Number(selectedIndex) : null;
     const lightbox = document.getElementById('display-picker-lightbox');
     const canvas = document.getElementById('display-picker-canvas');
 
@@ -157,8 +178,9 @@ function renderDisplayPickerLayout(displays) {
         const widthPct = (display.width / totalWidth) * 100;
         const heightPct = (display.height / totalHeight) * 100;
 
+        const isSelected = _displayPickerSelectedIndex !== null && display.index === _displayPickerSelectedIndex;
         return `
-            <div class="layout-display layout-display-pickable ${display.is_primary ? 'primary' : 'secondary'}"
+            <div class="layout-display layout-display-pickable${isSelected ? ' selected' : ''}"
                  style="left: ${leftPct}%; top: ${topPct}%; width: ${widthPct}%; height: ${heightPct}%;"
                  onclick="selectDisplay(${display.index})"
                  title="${t('displays.picker.click_to_select')}">
@@ -169,7 +191,6 @@ function renderDisplayPickerLayout(displays) {
                     <small>${display.width}×${display.height}</small>
                     <small>${display.refresh_rate}Hz</small>
                 </div>
-                ${display.is_primary ? '<div class="primary-indicator">★</div>' : ''}
             </div>
         `;
     }).join('');
@@ -2450,13 +2471,7 @@ async function showAddTemplateModal() {
     // Show modal
     const modal = document.getElementById('template-modal');
     modal.style.display = 'flex';
-
-    // Add backdrop click handler to close modal
-    modal.onclick = function(event) {
-        if (event.target === modal) {
-            closeTemplateModal();
-        }
-    };
+    setupBackdropClose(modal, closeTemplateModal);
 }
 
 // Edit template
@@ -2473,6 +2488,7 @@ async function editTemplate(templateId) {
         document.getElementById('template-modal-title').textContent = t('templates.edit');
         document.getElementById('template-id').value = templateId;
         document.getElementById('template-name').value = template.name;
+        document.getElementById('template-description').value = template.description || '';
 
         // Load available engines
         await loadAvailableEngines();
@@ -2494,13 +2510,7 @@ async function editTemplate(templateId) {
         // Show modal
         const modal = document.getElementById('template-modal');
         modal.style.display = 'flex';
-
-        // Add backdrop click handler to close modal
-        modal.onclick = function(event) {
-            if (event.target === modal) {
-                closeTemplateModal();
-            }
-        };
+        setupBackdropClose(modal, closeTemplateModal);
     } catch (error) {
         console.error('Error loading template:', error);
         showToast(t('templates.error.load') + ': ' + error.message, 'error');
@@ -2662,12 +2672,7 @@ async function showTestTemplateModal(templateId) {
     const modal = document.getElementById('test-template-modal');
     modal.style.display = 'flex';
 
-    // Add backdrop click handler to close modal
-    modal.onclick = function(event) {
-        if (event.target === modal) {
-            closeTestTemplateModal();
-        }
-    };
+    setupBackdropClose(modal, closeTestTemplateModal);
 }
 
 // Close test template modal
@@ -2738,7 +2743,8 @@ async function onEngineChange() {
     const defaultConfig = engine.default_config || {};
 
     if (Object.keys(defaultConfig).length === 0) {
-        configFields.innerHTML = `<p class="text-muted">${t('templates.config.none')}</p>`;
+        configSection.style.display = 'none';
+        return;
     } else {
         Object.entries(defaultConfig).forEach(([key, value]) => {
             const fieldType = typeof value === 'number' ? 'number' : 'text';
@@ -2917,12 +2923,14 @@ async function saveTemplate() {
         return;
     }
 
+    const description = document.getElementById('template-description').value.trim();
     const engineConfig = collectEngineConfig();
 
     const payload = {
         name,
         engine_type: engineType,
-        engine_config: engineConfig
+        engine_config: engineConfig,
+        description: description || null
     };
 
     try {
@@ -3105,6 +3113,7 @@ function renderPictureStreamsList(streams) {
                         ${engineIcon} ${escapeHtml(template.name)}
                     </div>
                 </div>
+                ${template.description ? `<div class="template-config" style="opacity:0.7;">${escapeHtml(template.description)}</div>` : ''}
                 <div class="stream-card-props">
                     <span class="stream-card-prop" title="${t('templates.engine')}">⚙️ ${template.engine_type.toUpperCase()}</span>
                     ${configEntries.length > 0 ? `<span class="stream-card-prop" title="${t('templates.config.show')}">🔧 ${configEntries.length}</span>` : ''}
@@ -3271,7 +3280,7 @@ async function showAddStreamModal(presetType) {
     const modal = document.getElementById('stream-modal');
     modal.style.display = 'flex';
     lockBody();
-    modal.onclick = (e) => { if (e.target === modal) closeStreamModal(); };
+    setupBackdropClose(modal, closeStreamModal);
 }
 
 async function editStream(streamId) {
@@ -3324,7 +3333,7 @@ async function editStream(streamId) {
         const modal = document.getElementById('stream-modal');
         modal.style.display = 'flex';
         lockBody();
-        modal.onclick = (e) => { if (e.target === modal) closeStreamModal(); };
+        setupBackdropClose(modal, closeStreamModal);
     } catch (error) {
         console.error('Error loading stream:', error);
         showToast(t('streams.error.load') + ': ' + error.message, 'error');
@@ -3550,7 +3559,7 @@ async function showTestStreamModal(streamId) {
     const modal = document.getElementById('test-stream-modal');
     modal.style.display = 'flex';
     lockBody();
-    modal.onclick = (e) => { if (e.target === modal) closeTestStreamModal(); };
+    setupBackdropClose(modal, closeTestStreamModal);
 }
 
 function closeTestStreamModal() {
@@ -3636,7 +3645,7 @@ async function showTestPPTemplateModal(templateId) {
     const modal = document.getElementById('test-pp-template-modal');
     modal.style.display = 'flex';
     lockBody();
-    modal.onclick = (e) => { if (e.target === modal) closeTestPPTemplateModal(); };
+    setupBackdropClose(modal, closeTestPPTemplateModal);
 }
 
 function closeTestPPTemplateModal() {
@@ -3888,7 +3897,7 @@ async function showAddPPTemplateModal() {
     const modal = document.getElementById('pp-template-modal');
     modal.style.display = 'flex';
     lockBody();
-    modal.onclick = (e) => { if (e.target === modal) closePPTemplateModal(); };
+    setupBackdropClose(modal, closePPTemplateModal);
 }
 
 async function editPPTemplate(templateId) {
@@ -3917,7 +3926,7 @@ async function editPPTemplate(templateId) {
         const modal = document.getElementById('pp-template-modal');
         modal.style.display = 'flex';
         lockBody();
-        modal.onclick = (e) => { if (e.target === modal) closePPTemplateModal(); };
+        setupBackdropClose(modal, closePPTemplateModal);
     } catch (error) {
         console.error('Error loading PP template:', error);
         showToast(t('postprocessing.error.load') + ': ' + error.message, 'error');
@@ -4066,7 +4075,7 @@ async function showStreamSelector(deviceId) {
         const modal = document.getElementById('stream-selector-modal');
         modal.style.display = 'flex';
         lockBody();
-        modal.onclick = (e) => { if (e.target === modal) closeStreamSelectorModal(); };
+        setupBackdropClose(modal, closeStreamSelectorModal);
     } catch (error) {
         console.error('Failed to load stream settings:', error);
         showToast('Failed to load stream settings', 'error');
@@ -4088,17 +4097,67 @@ async function updateStreamSelectorInfo(streamId) {
         }
         const stream = await response.json();
 
-        let infoHtml = `<div class="stream-info-type"><strong>${t('streams.type')}</strong> ${stream.stream_type === 'raw' ? t('streams.type.raw') : t('streams.type.processed')}</div>`;
+        const typeIcon = stream.stream_type === 'raw' ? '🖥️' : stream.stream_type === 'static_image' ? '🖼️' : '🎨';
+        const typeName = stream.stream_type === 'raw' ? t('streams.type.raw') : stream.stream_type === 'static_image' ? t('streams.type.static_image') : t('streams.type.processed');
 
+        let propsHtml = '';
         if (stream.stream_type === 'raw') {
-            infoHtml += `<div><strong>${t('streams.display')}</strong> ${stream.display_index ?? 0}</div>`;
-            infoHtml += `<div><strong>${t('streams.target_fps')}</strong> ${stream.target_fps ?? 30}</div>`;
-        } else {
-            const sourceStream = _cachedStreams.find(s => s.id === stream.source_stream_id);
-            infoHtml += `<div><strong>${t('streams.source')}</strong> ${sourceStream ? escapeHtml(sourceStream.name) : stream.source_stream_id}</div>`;
+            let capTmplName = '';
+            if (stream.capture_template_id) {
+                if (!_cachedCaptureTemplates || _cachedCaptureTemplates.length === 0) {
+                    try {
+                        const ctResp = await fetchWithAuth('/capture-templates');
+                        if (ctResp.ok) { const d = await ctResp.json(); _cachedCaptureTemplates = d.templates || []; }
+                    } catch {}
+                }
+                if (_cachedCaptureTemplates) {
+                    const capTmpl = _cachedCaptureTemplates.find(t => t.id === stream.capture_template_id);
+                    if (capTmpl) capTmplName = escapeHtml(capTmpl.name);
+                }
+            }
+            propsHtml = `
+                <span class="stream-card-prop" title="${t('streams.display')}">🖥️ ${stream.display_index ?? 0}</span>
+                <span class="stream-card-prop" title="${t('streams.target_fps')}">⚡ ${stream.target_fps ?? 30}</span>
+                ${capTmplName ? `<span class="stream-card-prop" title="${t('streams.capture_template')}">${capTmplName}</span>` : ''}
+            `;
+        } else if (stream.stream_type === 'processed') {
+            if ((!_cachedStreams || _cachedStreams.length === 0) && stream.source_stream_id) {
+                try {
+                    const streamsResp = await fetchWithAuth('/picture-streams');
+                    if (streamsResp.ok) { const d = await streamsResp.json(); _cachedStreams = d.streams || []; }
+                } catch {}
+            }
+            const sourceStream = _cachedStreams ? _cachedStreams.find(s => s.id === stream.source_stream_id) : null;
+            const sourceName = sourceStream ? escapeHtml(sourceStream.name) : (stream.source_stream_id || '-');
+            let ppTmplName = '';
+            if (stream.postprocessing_template_id) {
+                if (!_cachedPPTemplates || _cachedPPTemplates.length === 0) {
+                    try {
+                        const ppResp = await fetchWithAuth('/postprocessing-templates');
+                        if (ppResp.ok) { const d = await ppResp.json(); _cachedPPTemplates = d.templates || []; }
+                    } catch {}
+                }
+                if (_cachedPPTemplates) {
+                    const ppTmpl = _cachedPPTemplates.find(p => p.id === stream.postprocessing_template_id);
+                    if (ppTmpl) ppTmplName = escapeHtml(ppTmpl.name);
+                }
+            }
+            propsHtml = `
+                <span class="stream-card-prop" title="${t('streams.source')}">📺 ${sourceName}</span>
+                ${ppTmplName ? `<span class="stream-card-prop" title="${t('streams.pp_template')}">🎨 ${ppTmplName}</span>` : ''}
+            `;
+        } else if (stream.stream_type === 'static_image') {
+            const src = stream.image_source || '';
+            propsHtml = `<span class="stream-card-prop stream-card-prop-full" title="${escapeHtml(src)}">🌐 ${escapeHtml(src)}</span>`;
         }
 
-        infoPanel.innerHTML = infoHtml;
+        infoPanel.innerHTML = `
+            <div class="stream-card-props">
+                <span class="stream-card-prop" title="${t('streams.type')}">${typeIcon} ${typeName}</span>
+                ${propsHtml}
+            </div>
+            ${stream.description ? `<div class="template-config" style="opacity:0.7;">${escapeHtml(stream.description)}</div>` : ''}
+        `;
         infoPanel.style.display = '';
     } catch {
         infoPanel.style.display = 'none';

server/src/wled_controller/static/index.html

@@ -238,11 +238,10 @@
                     <div class="form-group">
                         <label for="stream-selector-stream" data-i18n="device.stream_selector.label">Stream:</label>
                         <select id="stream-selector-stream"></select>
+                        <div id="stream-selector-info" class="stream-info-panel" style="display: none;"></div>
                         <small class="input-hint" data-i18n="device.stream_selector.hint">Select a stream that defines what this device captures and processes</small>
                     </div>
 
-                    <div id="stream-selector-info" class="stream-info-panel" style="display: none;"></div>
-
                     <div class="form-group">
                         <label for="stream-selector-border-width" data-i18n="device.stream_settings.border_width">Border Width (px):</label>
                         <input type="number" id="stream-selector-border-width" min="1" max="100" value="10">
@@ -375,6 +374,11 @@
                         <input type="text" id="template-name" data-i18n-placeholder="templates.name.placeholder" placeholder="My Custom Template" required>
                     </div>
 
+                    <div class="form-group">
+                        <label for="template-description" data-i18n="templates.description.label">Description (optional):</label>
+                        <input type="text" id="template-description" data-i18n-placeholder="templates.description.placeholder" placeholder="Describe this template..." maxlength="500">
+                    </div>
+
                     <div class="form-group">
                         <label for="template-engine" data-i18n="templates.engine">Capture Engine:</label>
                         <select id="template-engine" onchange="onEngineChange()" required>
@@ -384,7 +388,7 @@
                     </div>
 
                     <div id="engine-config-section" style="display: none;">
-                        <h3 data-i18n="templates.config">Engine Configuration</h3>
+                        <h3 data-i18n="templates.config">Configuration</h3>
                         <div id="engine-config-fields"></div>
                     </div>
 
@@ -409,7 +413,7 @@
                 <div class="form-group">
                     <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)">
+                    <button type="button" class="btn btn-display-picker" id="test-display-picker-btn" onclick="openDisplayPicker(onTestDisplaySelected, document.getElementById('test-template-display').value)">
                         <span id="test-display-picker-label" data-i18n="displays.picker.select">Select display...</span>
                     </button>
                 </div>
@@ -423,7 +427,7 @@
                 </div>
 
                 <button type="button" class="btn btn-primary" onclick="runTemplateTest()" style="margin-top: 16px;">
-                    <span data-i18n="templates.test.run">🧪 Run Test</span>
+                    <span data-i18n="templates.test.run">🧪 Run</span>
                 </button>
 
             </div>
@@ -447,7 +451,7 @@
                 </div>
 
                 <button type="button" class="btn btn-primary" onclick="runStreamTest()" style="margin-top: 16px;">
-                    <span data-i18n="streams.test.run">🧪 Run Test</span>
+                    <span data-i18n="streams.test.run">🧪 Run</span>
                 </button>
 
             </div>
@@ -475,7 +479,7 @@
                 </div>
 
                 <button type="button" class="btn btn-primary" onclick="runPPTemplateTest()" style="margin-top: 16px;">
-                    <span data-i18n="streams.test.run">🧪 Run Test</span>
+                    <span data-i18n="streams.test.run">🧪 Run</span>
                 </button>
 
             </div>
@@ -504,7 +508,7 @@
                         <div class="form-group">
                             <label data-i18n="streams.display">Display:</label>
                             <input type="hidden" id="stream-display-index" value="">
-                            <button type="button" class="btn btn-display-picker" id="stream-display-picker-btn" onclick="openDisplayPicker(onStreamDisplaySelected)">
+                            <button type="button" class="btn btn-display-picker" id="stream-display-picker-btn" onclick="openDisplayPicker(onStreamDisplaySelected, document.getElementById('stream-display-index').value)">
                                 <span id="stream-display-picker-label" data-i18n="displays.picker.select">Select display...</span>
                             </button>
                         </div>

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

@@ -49,7 +49,7 @@
   "templates.engine.select": "Select an engine...",
   "templates.engine.unavailable": "Unavailable",
   "templates.engine.unavailable.hint": "This engine is not available on your system",
-  "templates.config": "Engine Configuration",
+  "templates.config": "Configuration",
   "templates.config.show": "Show configuration",
   "templates.config.none": "No additional configuration",
   "templates.config.default": "Default",
@@ -67,7 +67,7 @@
   "templates.test.display.select": "Select display...",
   "templates.test.duration": "Capture Duration (s):",
   "templates.test.border_width": "Border Width (px):",
-  "templates.test.run": "\uD83E\uDDEA Run Test",
+  "templates.test.run": "\uD83E\uDDEA Run",
   "templates.test.running": "Running test...",
   "templates.test.results.preview": "Full Capture Preview",
   "templates.test.results.borders": "Border Extraction",
@@ -229,7 +229,7 @@
   "streams.error.required": "Please fill in all required fields",
   "streams.error.delete": "Failed to delete stream",
   "streams.test.title": "Test Stream",
-  "streams.test.run": "🧪 Run Test",
+  "streams.test.run": "🧪 Run",
   "streams.test.running": "Testing stream...",
   "streams.test.duration": "Capture Duration (s):",
   "streams.test.error.failed": "Stream test failed",

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

@@ -49,7 +49,7 @@
   "templates.engine.select": "Выберите движок...",
   "templates.engine.unavailable": "Недоступен",
   "templates.engine.unavailable.hint": "Этот движок недоступен в вашей системе",
-  "templates.config": "Конфигурация Движка",
+  "templates.config": "Конфигурация",
   "templates.config.show": "Показать конфигурацию",
   "templates.config.none": "Нет дополнительных настроек",
   "templates.config.default": "По умолчанию",
@@ -67,7 +67,7 @@
   "templates.test.display.select": "Выберите дисплей...",
   "templates.test.duration": "Длительность Захвата (с):",
   "templates.test.border_width": "Ширина Границы (px):",
-  "templates.test.run": "\uD83E\uDDEA Запустить Тест",
+  "templates.test.run": "\uD83E\uDDEA Запустить",
   "templates.test.running": "Выполняется тест...",
   "templates.test.results.preview": "Полный Предпросмотр Захвата",
   "templates.test.results.borders": "Извлечение Границ",
@@ -229,7 +229,7 @@
   "streams.error.required": "Пожалуйста, заполните все обязательные поля",
   "streams.error.delete": "Не удалось удалить поток",
   "streams.test.title": "Тест Потока",
-  "streams.test.run": "🧪 Запустить Тест",
+  "streams.test.run": "🧪 Запустить",
   "streams.test.running": "Тестирование потока...",
   "streams.test.duration": "Длительность Захвата (с):",
   "streams.test.error.failed": "Тест потока не удался",

server/src/wled_controller/static/style.css

@@ -37,6 +37,7 @@ body {
 
 html {
     background: var(--bg-color);
+    overflow-y: scroll;
 }
 
 body {
@@ -2159,23 +2160,11 @@ input:-webkit-autofill:focus {
 
 /* Stream info panel in stream selector modal */
 .stream-info-panel {
-    background: var(--bg-secondary, #2a2a2a);
-    border: 1px solid var(--border-color);
-    border-radius: 8px;
-    padding: 12px 16px;
-    margin-top: 12px;
+    padding: 4px 0 0 0;
     font-size: 14px;
     line-height: 1.6;
 }
 
-.stream-info-panel div {
-    margin-bottom: 4px;
-}
-
-.stream-info-panel strong {
-    margin-right: 6px;
-}
-
 /* Stream sub-tabs */
 .stream-tab-bar {
     display: flex;
@@ -2359,6 +2348,8 @@ input:-webkit-autofill:focus {
 
 .layout-display-pickable {
     cursor: pointer !important;
+    border: 2px solid var(--border-color) !important;
+    background: linear-gradient(135deg, rgba(128, 128, 128, 0.08), rgba(128, 128, 128, 0.03)) !important;
 }
 
 .layout-display-pickable:hover {
@@ -2366,6 +2357,12 @@ input:-webkit-autofill:focus {
     border-color: var(--primary-color) !important;
 }
 
+.layout-display-pickable.selected {
+    border-color: var(--primary-color) !important;
+    box-shadow: 0 0 16px rgba(76, 175, 80, 0.5);
+    background: rgba(76, 175, 80, 0.12) !important;
+}
+
 /* Display picker button in forms */
 .btn-display-picker {
     width: 100%;

server/src/wled_controller/storage/template_store.py

@@ -49,12 +49,12 @@ class TemplateStore:
 
         template = CaptureTemplate(
             id=template_id,
-            name=best_engine.upper(),
+            name="Default",
             engine_type=best_engine,
             engine_config=default_config,
             created_at=now,
             updated_at=now,
-            description=f"Auto-created {best_engine.upper()} template",
+            description=f"Default capture template using {best_engine.upper()} engine",
         )
 
         self._templates[template_id] = template