feat(settings): add limit quality to device toggle and max sample rate tracking

Frontend changes for quality limiting feature:
- Add limitQualityToDevice state and handler
- Add AudioSettings interface fields for limit_quality_to_device and device_max_sample_rate
- Update handleBackendDeviceChange to send max_sample_rate when device changes
- Update handleOutputDeviceChange to find max_sample_rate from backend devices
- Add Settings UI toggle for "Limit Quality to Device"

This completes the quality limiting feature that prevents requesting tracks
that exceed the device's sample rate capabilities, ensuring bit-perfect playback.

src-tauri/src/commands/playback.rs

@@ -43,7 +43,7 @@ fn limit_quality_for_device(quality: Quality, max_sample_rate: Option<u32>) -> Q
             Quality::UltraHiRes | Quality::HiRes => {
                 log::info!(
                     "[Quality Limit] Device max {}Hz, limiting {} to Lossless (44.1kHz)",
-                    max_rate, quality.display_name()
+                    max_rate, quality.label()
                 );
                 Quality::Lossless
             }