Fix mock device RGBW badge, add icons to audio/value source card badges

Fall back to stored device rgbw field when health check doesn't report
it (mock devices have no hardware to query). Add emoji icons to all
property badges on audio source and value source cards.

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

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

@@ -272,6 +272,13 @@ class ProcessorManager:
 
         ds = self._devices[device_id]
         h = ds.health
+        # Fall back to stored device rgbw when health check doesn't report it
+        # (e.g. mock devices have no real hardware to query)
+        rgbw = h.device_rgbw
+        if rgbw is None and self._device_store:
+            dev = self._device_store.get_device(device_id)
+            if dev:
+                rgbw = getattr(dev, "rgbw", False)
         return {
             "device_id": device_id,
             "device_online": h.online,
@@ -279,7 +286,7 @@ class ProcessorManager:
             "device_name": h.device_name,
             "device_version": h.device_version,
             "device_led_count": h.device_led_count,
-            "device_rgbw": h.device_rgbw,
+            "device_rgbw": rgbw,
             "device_led_type": h.device_led_type,
             "device_fps": h.device_fps,
             "device_last_checked": h.last_checked,