Add Daylight Cycle and Candlelight CSS source types

Full-stack implementation of two new color strip source types:
- Daylight: simulates day/night color cycle with real-time or speed-based mode, latitude support
- Candlelight: multi-candle fire simulation with Gaussian falloff, layered-sine flicker, warm color shift

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

server/src/wled_controller/api/routes/color_strip_sources.py

@@ -7,6 +7,7 @@ from fastapi import APIRouter, Depends, HTTPException, Query, WebSocket, WebSock
 
 from wled_controller.api.auth import AuthRequired
 from wled_controller.api.dependencies import (
+    fire_entity_event,
     get_color_strip_store,
     get_picture_source_store,
     get_output_target_store,
@@ -99,6 +100,10 @@ def _css_to_response(source, overlay_active: bool = False) -> ColorStripSourceRe
         app_filter_mode=getattr(source, "app_filter_mode", None),
         app_filter_list=getattr(source, "app_filter_list", None),
         os_listener=getattr(source, "os_listener", None),
+        speed=getattr(source, "speed", None),
+        use_real_time=getattr(source, "use_real_time", None),
+        latitude=getattr(source, "latitude", None),
+        num_candles=getattr(source, "num_candles", None),
         overlay_active=overlay_active,
         tags=getattr(source, 'tags', []),
         created_at=source.created_at,
@@ -191,8 +196,13 @@ async def create_color_strip_source(
             app_filter_mode=data.app_filter_mode,
             app_filter_list=data.app_filter_list,
             os_listener=data.os_listener,
+            speed=data.speed,
+            use_real_time=data.use_real_time,
+            latitude=data.latitude,
+            num_candles=data.num_candles,
             tags=data.tags,
         )
+        fire_entity_event("color_strip_source", "created", source.id)
         return _css_to_response(source)
 
     except ValueError as e:
@@ -275,6 +285,10 @@ async def update_color_strip_source(
             app_filter_mode=data.app_filter_mode,
             app_filter_list=data.app_filter_list,
             os_listener=data.os_listener,
+            speed=data.speed,
+            use_real_time=data.use_real_time,
+            latitude=data.latitude,
+            num_candles=data.num_candles,
             tags=data.tags,
         )
 
@@ -284,6 +298,7 @@ async def update_color_strip_source(
         except Exception as e:
             logger.warning(f"Could not hot-reload CSS stream {source_id}: {e}")
 
+        fire_entity_event("color_strip_source", "updated", source_id)
         return _css_to_response(source)
 
     except ValueError as e:
@@ -327,6 +342,7 @@ async def delete_color_strip_source(
                        "Remove it from the mapped source(s) first.",
             )
         store.delete_source(source_id)
+        fire_entity_event("color_strip_source", "deleted", source_id)
     except HTTPException:
         raise
     except ValueError as e: