fix: make test_demo use workspace files, remove obsolete tools/test_demo.*

- test_demo now uses workspaces/test/{timeline.seq,music.track}
- Removed tools/test_demo.{seq,track} (no longer used)
- Updated docs to reference workspace files
- Changes to workspaces/test/timeline.seq now trigger rebuild

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/doc/test_demo_README.md b/doc/test_demo_README.md
index 6ccada0..3c4631d 100644
--- a/doc/test_demo_README.md
+++ b/doc/test_demo_README.md
@@ -85,9 +85,9 @@ Music time drifts from physical time. Patterns respect tempo scaling.
 - Fine-grained: Millisecond-resolution analysis, detect jitter
 
 ## Files
-- `src/test_demo.cc`: Main executable (~220 lines)
-- `assets/test_demo.track`: Drum pattern
-- `assets/test_demo.seq`: Visual timeline
+- `src/app/test_demo.cc`: Main executable (~220 lines)
+- `workspaces/test/music.track`: Drum pattern
+- `workspaces/test/timeline.seq`: Visual timeline
 - `src/generated/test_demo_*.cc`: Generated code
 
 ## Verification
@@ -111,7 +111,7 @@ Music time drifts from physical time. Patterns respect tempo scaling.
 **Flash before audio:** Reduce ring buffer size (`ring_buffer.h`)
 **Flash after audio:** Increase pre-fill (`audio_render_ahead()`)
 **No flash:** Increase `visual_peak` multiplier (currently 8.0×)
-**A4 not audible:** Increase volume in `test_demo.track`
+**A4 not audible:** Increase volume in `workspaces/test/music.track`
 **Empty log:** Ensure demo runs ≥0.5s
 
 ## Design Rationale