fase 3: port de jail_audio header-only amb streaming i sense SDL_AddTimer

CLAUDE.md

@@ -216,7 +216,7 @@ JD8_Flip produces ABGR byte order: `0xFF000000 + R + (G<<8) + (B<<16)`. SDL text
 3. **No sound effects in game**: Game code never calls `JA_PlaySound*`/`JA_LoadSound` — only music via `JA_PlayMusic`/`JA_FadeOutMusic`. The SONS and VOL SONS menu items control volume of an empty channel pool. Infrastructure ready for future SFX.
 4. **Raw `malloc`/`free` in gameplay structs**: `Sprite`/`Entitat` use `malloc` for `Frame[]` and `Animacio[]`; `jfile.cpp` uses a global `scratch[255]` buffer (UB under concurrent calls); `jail_audio.cpp` mixes `new`/`malloc`/`SDL_malloc`. Scheduled for Phase 1 (RAII pass).
 5. **Blocking loops in cinematics and fades**: `ModuleSequence::doIntro()` has 15+ `while(!JG_ShouldUpdate())` spin-waits; `JD8_FadeOut`/`JD8_FadeToPal` run 32 internal iterations calling `JD8_Flip`. Incompatible with `SDL_AppIterate`. Scheduled for Phase 2 (state-machine refactor).
-6. **`SDL_AddTimer` in audio**: `JA_Init` registers a 30ms timer callback for mixing/fade update. Incompatible with emscripten single-threaded model. Scheduled for Phase 3 (manual `JA_Update(delta_ms)` driven from Director).
+6. ~~**`SDL_AddTimer` in audio**~~: Fixed in Phase 3. `jail_audio` is now a header-only `inline` module (single `.cpp` stub only hosts the `stb_vorbis` implementation to avoid multiple definitions). Music uses true streaming via `stb_vorbis_open_memory` + `JA_PumpMusic` with a 0.5s low-water-mark instead of decoding the whole OGG into RAM. Mixing/fade update runs manually via `JA_Update()` called once per frame from `Director::run()`. Ported from the `jaildoctors_dilemma` codebase.
 7. **Game thread + `publishFrame` mutex/cv**: the emulator-style architecture is only tenable while native. Incompatible with `SDL_AppIterate`. Scheduled for Phase 5 (single-threaded state machine).
 
 ### Pending / Ideas for Later