feat: asset-based image/video sources, notification sounds, UI improvements

- Replace URL-based image_source/url fields with image_asset_id/video_asset_id
  on StaticImagePictureSource and VideoCaptureSource (clean break, no migration)
- Resolve asset IDs to file paths at runtime via AssetStore.get_file_path()
- Add EntitySelect asset pickers for image/video in stream editor modal
- Add notification sound configuration (global sound + per-app overrides)
- Unify per-app color and sound overrides into single "Per-App Overrides" section
- Persist notification history between server restarts
- Add asset management system (upload, edit, delete, soft-delete)
- Replace emoji buttons with SVG icons throughout UI
- Various backend improvements: SQLite stores, auth, backup, MQTT, webhooks

server/src/wled_controller/storage/automation.py

@@ -1,9 +1,12 @@
 """Automation and Condition data models."""
 
+import logging
 from dataclasses import dataclass, field
 from datetime import datetime, timezone
 from typing import Dict, List, Optional, Type
 
+logger = logging.getLogger(__name__)
+
 
 @dataclass
 class Condition:
@@ -226,7 +229,8 @@ class Automation:
         for c_data in data.get("conditions", []):
             try:
                 conditions.append(Condition.from_dict(c_data))
-            except ValueError:
+            except ValueError as e:
+                logger.warning("Skipping unknown condition type on load: %s", e)
                 pass  # skip unknown condition types on load
 
         return cls(