wasm: enable AudioWorklets with JSPI to fix no-sound on web

[Copilot]

Web audio was broken because miniaudio's AudioWorklet initialization calls emscripten_sleep() in a spin-wait, which requires JSPI — but sokol's RAF callback (_sapp_emsc_frame_animation_loop) was not wrapped with WebAssembly.promising, causing SuspendError: trying to suspend without WebAssembly.promising.

Changes

• make.lua

  • Add MA_ENABLE_AUDIO_WORKLETS (switches miniaudio from deprecated ScriptProcessorNode to AudioWorklets)
  • Add -sJSPI, -sAUDIO_WORKLET=1, -sWASM_WORKERS=1
  • Remove -sMAIN_MODULE=1 — incompatible with -sWASM_WORKERS=1

• src/platform/wasm/soluna_audio_wasm.js (new)
  Overrides emscripten_request_animation_frame_loop to wrap the WASM frame callback with WebAssembly.promising(), making it a valid JSPI suspension point. Falls back to a synchronous call when JSPI is unavailable.

  emscripten_request_animation_frame_loop: function(cb, userData) {
    var fn = getWasmTableEntry(cb);
    var promisingFn = WebAssembly.promising?.(fn) ?? null;
    function tick(rAF_time) {
      if (promisingFn) {
        promisingFn(rAF_time, userData).then(keepGoing => {
          if (keepGoing) requestAnimationFrame(tick);
        });
      } else {
        if (fn(rAF_time, userData)) requestAnimationFrame(tick);
      }
    }
    requestAnimationFrame(tick);
  }

  During the first frame where render_init runs, the audio worklet thread initializes asynchronously; each emscripten_sleep(1) in miniaudio's spin-wait suspends the WASM stack via JSPI and yields to the browser event loop until initResult transitions from MA_BUSY to MA_SUCCESS. Subsequent frames are unaffected.

Note: Removing MAIN_MODULE=1 breaks the extlua dynamic-loading demo on web until that module is ported to static linking.

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[yuchanns]

我尝试部署了这个分支, 结果一样有

VM56 soluna.wasm:1  Uncaught (in promise) SuspendError: trying to suspend JS frames
    at VM56 soluna.wasm:1:494979
    at VM56 soluna.wasm:1:542218
    at VM56 soluna.wasm:1:560058
    at VM56 soluna.wasm:1:621739
    at VM56 soluna.wasm:1:620623
    at VM56 soluna.wasm:1:508042
    at VM56 soluna.wasm:1:544631
    at VM56 soluna.wasm:1:611598
    at VM56 soluna.wasm:1:362522
    at VM56 soluna.wasm:1:209337

[cloudwu]

问题已解决，并不需要这个方案。