Add EntitySelect/IconSelect UI improvements across modals

- Portal IconSelect popups to document.body with position:fixed to prevent
  clipping by modal overflow-y:auto
- Replace custom scene selectors in automation editor with EntitySelect
  command-palette pickers (main scene + fallback scene)
- Add IconSelect grid for automation deactivation mode (none/revert/fallback)
- Add IconSelect grid for automation condition type and match type
- Replace mapped zone source dropdowns with EntitySelect pickers
- Replace scene target selector with EntityPalette.pick() pattern
- Remove effect palette preview bar from CSS editor
- Remove sensitivity badge from audio color strip source cards
- Clean up unused scene-selector CSS and scene-target-add-row CSS
- Add locale keys for all new UI elements across en/ru/zh

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

server/src/wled_controller/api/schemas/devices.py

@@ -34,9 +34,31 @@ class DeviceUpdate(BaseModel):
     zone_mode: Optional[str] = Field(None, description="OpenRGB zone mode: combined or separate")
 
 
+class CalibrationLineSchema(BaseModel):
+    """One LED line in advanced calibration."""
+
+    picture_source_id: str = Field(description="Picture source (monitor) to sample from")
+    edge: Literal["top", "right", "bottom", "left"] = Field(description="Screen edge to sample")
+    led_count: int = Field(ge=1, description="Number of LEDs in this line")
+    span_start: float = Field(default=0.0, ge=0.0, le=1.0, description="Start fraction along edge")
+    span_end: float = Field(default=1.0, ge=0.0, le=1.0, description="End fraction along edge")
+    reverse: bool = Field(default=False, description="Reverse LED direction")
+    border_width: int = Field(default=10, ge=1, le=100, description="Sampling depth in pixels")
+
+
 class Calibration(BaseModel):
     """Calibration configuration for pixel-to-LED mapping."""
 
+    mode: Literal["simple", "advanced"] = Field(
+        default="simple",
+        description="Calibration mode: simple (4-edge) or advanced (multi-source lines)"
+    )
+    # Advanced mode: ordered list of lines
+    lines: Optional[List[CalibrationLineSchema]] = Field(
+        default=None,
+        description="Line list for advanced mode (ignored in simple mode)"
+    )
+    # Simple mode fields
     layout: Literal["clockwise", "counterclockwise"] = Field(
         default="clockwise",
         description="LED strip layout direction"