Refactor process picker into palette pattern, add notification app picker

- Refactor process-picker.ts into generic NamePalette with two concrete
  instances: ProcessPalette (running processes) and NotificationAppPalette
  (OS notification history apps)
- Notification color strip app colors and filter list now use
  NotificationAppPalette (shows display names like "Telegram" instead of
  process names like "telegram.exe")
- Fix case-insensitive matching for app_colors and app_filter_list in
  notification_stream.py
- Compact browse/remove buttons in notification app color rows with
  proper search icon
- Remove old inline process-picker HTML/CSS (replaced by palette overlay)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/src/wled_controller/core/processing/notification_stream.py

@@ -68,9 +68,9 @@ class NotificationColorStripStream(ColorStripStream):
         self._notification_effect = getattr(source, "notification_effect", "flash")
         self._duration_ms = max(100, int(getattr(source, "duration_ms", 1500)))
         self._default_color = getattr(source, "default_color", "#FFFFFF")
-        self._app_colors = dict(getattr(source, "app_colors", {}))
+        self._app_colors = {k.lower(): v for k, v in dict(getattr(source, "app_colors", {})).items()}
         self._app_filter_mode = getattr(source, "app_filter_mode", "off")
-        self._app_filter_list = list(getattr(source, "app_filter_list", []))
+        self._app_filter_list = [a.lower() for a in getattr(source, "app_filter_list", [])]
         self._auto_size = not getattr(source, "led_count", 0)
         self._led_count = getattr(source, "led_count", 0) if getattr(source, "led_count", 0) > 0 else 1
         with self._colors_lock:
@@ -86,9 +86,12 @@ class NotificationColorStripStream(ColorStripStream):
         Returns:
             True if the notification was accepted, False if filtered out.
         """
+        # Normalize app name for case-insensitive matching
+        app_lower = app_name.lower() if app_name else None
+
         # Check app filter
-        if app_name and self._app_filter_mode != "off":
-            in_list = app_name in self._app_filter_list
+        if app_lower and self._app_filter_mode != "off":
+            in_list = app_lower in self._app_filter_list
             if self._app_filter_mode == "whitelist" and not in_list:
                 return False
             if self._app_filter_mode == "blacklist" and in_list:
@@ -97,8 +100,8 @@ class NotificationColorStripStream(ColorStripStream):
         # Resolve color: override > app_colors[app_name] > default_color
         if color_override:
             color = _hex_to_rgb(color_override)
-        elif app_name and app_name in self._app_colors:
-            color = _hex_to_rgb(self._app_colors[app_name])
+        elif app_lower and app_lower in self._app_colors:
+            color = _hex_to_rgb(self._app_colors[app_lower])
         else:
             color = _hex_to_rgb(self._default_color)