30a193b2c9
1. Error text shows in red inside the desktop audio meter bar (scrollable) when TRAX load or playback fails — user gets feedback, not just a silent red dot. 2. LoadTrax no longer nulls _music on error — the track path is retained so the user sees what failed and can retry. 3. OnTraxPlaybackEnded now receives the NAudio exception and surfaces it. 4. TRAX dot is green (playing) or gray (idle/no track) — no more yellow or red states. 207 tests, 0 warnings.