fix: 修复语音停顿导致提前粘贴的问题（累积文本，松开按钮才粘贴）

internal/ws/handler.go

@@ -62,23 +62,32 @@ func (h *Handler) handleConn(c *websocket.Conn) {
   defer close(resultCh)
 
   // Writer goroutine: single writer to avoid concurrent writes
+  // Accumulates all result texts; paste is triggered by stop, not by ASR final.
   var wg sync.WaitGroup
+  var accMu sync.Mutex
+  var accText string
   wg.Add(1)
   go func() {
     defer wg.Done()
     for msg := range resultCh {
+      // Accumulate text from both partial and final results
+      if msg.Type == MsgPartial || msg.Type == MsgFinal {
+        accMu.Lock()
+        accText += msg.Text
+        // Send accumulated preview to phone
+        preview := ServerMsg{Type: MsgPartial, Text: accText}
+        accMu.Unlock()
+        if err := c.WriteMessage(websocket.TextMessage, preview.Bytes()); err != nil {
+          log.Warn("ws write error", "err", err)
+          return
+        }
+        continue
+      }
+      // Forward other messages (error, pasted) as-is
       if err := c.WriteMessage(websocket.TextMessage, msg.Bytes()); err != nil {
         log.Warn("ws write error", "err", err)
         return
       }
-      // Auto-paste on final result
-      if msg.Type == MsgFinal && msg.Text != "" && h.pasteFunc != nil {
-        if err := h.pasteFunc(msg.Text); err != nil {
-          log.Error("auto-paste failed", "err", err)
-        } else {
-          _ = c.WriteMessage(websocket.TextMessage, ServerMsg{Type: MsgPasted}.Bytes())
-        }
-      }
     }
   }()
 
@@ -119,6 +128,10 @@ func (h *Handler) handleConn(c *websocket.Conn) {
         if active {
           continue
         }
+        // Reset accumulated text for new session
+        accMu.Lock()
+        accText = ""
+        accMu.Unlock()
         sa, cl, err := h.asrFactory(resultCh)
         if err != nil {
           log.Error("asr start failed", "err", err)
@@ -134,12 +147,25 @@ func (h *Handler) handleConn(c *websocket.Conn) {
         if !active {
           continue
         }
+        // Finish ASR session — waits for final result from readLoop
         if cleanup != nil {
           cleanup()
           cleanup = nil
         }
         sendAudio = nil
         active = false
+        // Now paste the accumulated text
+        accMu.Lock()
+        finalText := accText
+        accText = ""
+        accMu.Unlock()
+        if finalText != "" && h.pasteFunc != nil {
+          if err := h.pasteFunc(finalText); err != nil {
+            log.Error("auto-paste failed", "err", err)
+          } else {
+            resultCh <- ServerMsg{Type: MsgPasted}
+          }
+        }
         log.Info("recording stopped")
 
       case MsgPaste: