Fix quality setting and device name display issues (#34)

- Clear both L1 memory and L2 disk caches when quality setting changes
  This ensures cached tracks at wrong quality are removed
- Fix device name not showing in popup on first hover
  Now refreshes status on each hover instead of only when null
- Add quality downgrade indicator when stream quality is lower than
  track's original quality (shows yellow arrow with tooltip)
- Store original track quality values for comparison with actual stream

src/routes/+page.svelte

@@ -2993,6 +2993,8 @@
         quality={currentTrack.quality}
         bitDepth={currentTrack.bitDepth}
         samplingRate={currentTrack.samplingRate}
+        originalBitDepth={currentTrack.originalBitDepth}
+        originalSamplingRate={currentTrack.originalSamplingRate}
         format={currentTrack.format}
         {isPlaying}
         onTogglePlay={togglePlay}
@@ -3078,6 +3080,8 @@
         qualityLevel={currentTrack.quality.includes('24') ? 5 : 3}
         bitDepth={currentTrack.bitDepth}
         samplingRate={currentTrack.samplingRate}
+        originalBitDepth={currentTrack.originalBitDepth}
+        originalSamplingRate={currentTrack.originalSamplingRate}
         format={currentTrack.format}
         {isPlaying}
         onTogglePlay={togglePlay}