fix: Improve Whisper model status error handling

- Set sidecarReady to false when model_error is received
- Store error message in activeWhisperConfig for status display
- Update frontend to show error state with red indicator
- Prevents showing ✅ when model failed to load

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

client/src/main.js

@@ -434,10 +434,16 @@ function startSidecar() {
             mainWindow.webContents.send("model-download-progress", msg);
           }
 
-          // Forward model error status
-          if (msg.status === "model_error" && mainWindow) {
+          // Forward model error status and mark sidecar as not ready
+          if (msg.status === "model_error") {
+            sidecarReady = false;
+            if (activeWhisperConfig) {
+              activeWhisperConfig.error = msg.error || "Model load failed";
+            }
+            if (mainWindow) {
               mainWindow.webContents.send("model-download-progress", msg);
             }
+          }
         } catch (e) {
           console.log("Sidecar output:", line);
         }

client/src/pages/meeting-detail.html

@@ -289,10 +289,17 @@
       try {
         const status = await window.electronAPI.getSidecarStatus();
         if (status.whisper) {
+          // Check if there was an error loading the model
+          if (status.whisper.error) {
+            whisperStatusEl.textContent = `❌ Model error: ${status.whisper.error}`;
+            whisperStatusEl.style.color = '#dc3545';
+            whisperStatusEl.title = 'Model failed to load';
+          } else {
             const readyIcon = status.ready ? '✅' : '⏳';
             whisperStatusEl.textContent = `${readyIcon} Model: ${status.whisper.model} | Device: ${status.whisper.device} | Compute: ${status.whisper.compute}`;
             whisperStatusEl.title = `Config source: ${status.whisper.configSource || 'unknown'}`;
             whisperStatusEl.style.color = status.ready ? '#28a745' : '#ffc107';
+          }
         } else {
           whisperStatusEl.textContent = status.ready ? '✅ Ready' : '⏳ Loading...';
           whisperStatusEl.style.color = status.ready ? '#28a745' : '#ffc107';