fix: 修复 AudioWorklet 未收到 start 指令导致无音频数据发送

web/app.js

@@ -196,6 +196,7 @@
         }
       };
       source.connect(worklet);
+      worklet.port.postMessage({ command: "start" });
       // Don't connect worklet to destination (no playback)
       state.workletNode = worklet;
       state.recording = true;