feat(ui): edit tab zones, audio readout, live reload

- Zones/presets/sequence strip and Pipfile dev command fix
- Optional live reload and beat test audio asset + generator

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

src/util/audio_run_persist.py

@@ -0,0 +1,52 @@
+"""Persist whether the audio beat detector should be running (survives process restarts)."""
+
+from __future__ import annotations
+
+import json
+import os
+from typing import Any, Dict, Optional
+
+
+def _db_path() -> str:
+    base = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+    return os.path.join(base, "db", "audio_run.json")
+
+
+def coerce_audio_device(device: Any) -> Optional[Any]:
+    """Match ``/api/audio/start`` body coercion (None = host default input)."""
+    if device in ("", None):
+        return None
+    try:
+        return int(device)
+    except (TypeError, ValueError):
+        return device
+
+
+def read_audio_run_state() -> Dict[str, Any]:
+    path = _db_path()
+    try:
+        with open(path, "r", encoding="utf-8") as f:
+            raw = json.load(f)
+    except (OSError, json.JSONDecodeError, TypeError):
+        return {"enabled": False, "device": None}
+    if not isinstance(raw, dict):
+        return {"enabled": False, "device": None}
+    enabled = bool(raw.get("enabled"))
+    dev = raw.get("device", None)
+    return {"enabled": enabled, "device": dev}
+
+
+def write_audio_run_state(*, enabled: bool, device: Any = None) -> None:
+    """Write run intent. When ``enabled`` is false, keep ``device`` from the previous file for next start."""
+    path = _db_path()
+    prev = read_audio_run_state()
+    if enabled:
+        data = {"enabled": True, "device": device}
+    else:
+        data = {"enabled": False, "device": prev.get("device")}
+    try:
+        os.makedirs(os.path.dirname(path), exist_ok=True)
+        with open(path, "w", encoding="utf-8") as f:
+            json.dump(data, f, indent=2)
+    except OSError as e:
+        print(f"[audio_run_persist] save failed: {e!r}")