Fix Lyria silent failures and surface generation status in the player.

Robust candidate-part parsing, quota-aware errors, live composing feedback, and two new desert dub tracks in the library.

Co-authored-by: Cursor <cursoragent@cursor.com>

songs/eeebb429.meta.json

@@ -0,0 +1,10 @@
+{
+  "id": "eeebb429",
+  "title": "Desert Mirage",
+  "mood": "hypnotic, warm, late-night desert dub",
+  "dj_line": "Sending you a dust-kissed groove from the edge of the dunes \u2014 let the delays carry you through the night.",
+  "lyria_prompt": "Instrumental dubtronica track at 92 BPM in D minor. Start with a deep, sub-heavy bassline in a slow stepper rhythm. Layer a clean, plucked kora melody with long, spacey reverb and tape delay. Add a muted guitar skank playing offbeat chords with spring reverb. Hand percussion: djembe and shakers playing a relaxed, syncopated pattern. Introduce a melodica line with heavy echo, floating in the mix. Use analog warmth and subtle vinyl crackle. Build slowly, keeping the arrangement open and spacious. No vocals. Structure: intro with bass and percussion, add kora, then guitar, then melodica, then drop to just bass and percussion before returning with all elements. Fade out with delays.",
+  "lyrics": "[[A0]]\n[[A1]]\n[[A2]]\n[[A3]]\n[[A4]]\n[[A5]]\n[[B6]]",
+  "file": "eeebb429_Desert_Mirage.mp3",
+  "saved_at": "2026-06-07T13:30:41.265970+00:00"
+}