Fix bypass JSON bool + load SF2 tracks into bridge on restore

- RenderFxJob: parse bypass as JSON bool (memberBool) — bypass:true
  previously ignored (memberInt parses numbers only), plugin kept
  processing. Verified: bypass RMS == plain, VST3 loaded once.
- preloadTrackInstruments / bridge reconnect: load SF2 instruments
  into bridge too (loadAnyTrackToBridge) — opened projects with SF2
  tracks sent MIDI to empty bridge channels (C++ silent), never
  reaching the native mastering chain.
- rebuild app.precompiled.js from app.jsx (was stale: missing A14).

native_bridge/src/RenderFxJob.cpp

@@ -1104,7 +1104,7 @@ std::shared_ptr<RealtimeFxChain::Impl::Chain> RealtimeFxChain::Impl::buildChain(
         const std::string path = memberString(o, "path", "");
         if (path.empty()) continue;
         Entry ent;
-        ent.bypass = memberInt(o, "bypass", 0) != 0;
+        ent.bypass = memberBool(o, "bypass", false);
         if (!ent.bypass) {
             auto fx = std::make_shared<Vst3Fx>();
             if (fx->load(path, sampleRate_, blockSize_)) {