fix(phase3): context navigation and autoplay persistence

- Fixed context navigation using correct property names (.type, .id)
- Simplified autoplay setting from radio buttons to toggle switch
- Fixed tooltip using native title attribute (like QualityBadge)
- Removed custom tooltip CSS and hover state
- Updated translations (en/es) for clearer autoplay behavior description

cp

src/lib/i18n/locales/en.json

@@ -312,8 +312,8 @@
       "crossfade": "Crossfade",
       "crossfadeSeconds": "{seconds}s",
       "normalizeVolume": "Normalize Volume",
-      "autoplayBehavior": "Autoplay behavior",
-      "autoplayBehaviorDesc": "Choose what happens when you click a track",
+      "autoplayBehavior": "Continue playback after track ends",
+      "autoplayBehaviorDesc": "When enabled, plays next track in the source. When disabled, stops after each track",
       "continueWithinSource": "Continue within source",
       "playOnlySelectedTrack": "Play only selected track",
       "showContextIcon": "Show track playing context in player",