feat: enhance follow-up feature handling and improve async processing

- Implemented asynchronous follow-up work in AutoModeService to allow immediate API response, enabling smoother user experience.
- Updated BoardView to handle follow-up prompts more efficiently, including state management and success notifications.
- Adjusted mock AutoMode API to simulate background processing for follow-up tasks, aligning with real implementation behavior.

These changes streamline the workflow for sending follow-up prompts and improve the responsiveness of the UI.

app/electron/auto-mode-service.js

@@ -557,6 +557,21 @@ class AutoModeService {
     execution.sendToRenderer = sendToRenderer;
     this.runningFeatures.set(featureId, execution);
 
+    // Start the async work in the background (don't await)
+    // This allows the API to return immediately so the modal can close
+    this.runFollowUpWork({ projectPath, featureId, prompt, imagePaths, sendToRenderer, execution }).catch((error) => {
+      console.error("[AutoMode] Follow-up work error:", error);
+      this.runningFeatures.delete(featureId);
+    });
+
+    // Return immediately so the frontend can close the modal
+    return { success: true };
+  }
+
+  /**
+   * Internal method to run follow-up work asynchronously
+   */
+  async runFollowUpWork({ projectPath, featureId, prompt, imagePaths, sendToRenderer, execution }) {
     try {
       // Load features
       const features = await featureLoader.loadFeatures(projectPath);
@@ -611,8 +626,6 @@ class AutoModeService {
         passes: result.passes,
         message: result.message,
       });
-
-      return { success: true, passes: result.passes };
     } catch (error) {
       console.error("[AutoMode] Error in follow-up:", error);
       sendToRenderer({
@@ -620,7 +633,6 @@ class AutoModeService {
         error: error.message,
         featureId: featureId,
       });
-      throw error;
     } finally {
       this.runningFeatures.delete(featureId);
     }

app/src/components/views/board-view.tsx

@@ -706,56 +706,55 @@ export function BoardView() {
   const handleSendFollowUp = async () => {
     if (!currentProject || !followUpFeature || !followUpPrompt.trim()) return;
 
+    // Save values before clearing state
+    const featureId = followUpFeature.id;
+    const featureDescription = followUpFeature.description;
+    const prompt = followUpPrompt;
+    const imagePaths = followUpImagePaths.map(img => img.path);
+
     console.log("[Board] Sending follow-up prompt for feature:", {
-      id: followUpFeature.id,
-      prompt: followUpPrompt,
-      imagePaths: followUpImagePaths
+      id: featureId,
+      prompt: prompt,
+      imagePaths: imagePaths
     });
 
-    try {
-      const api = getElectronAPI();
-      if (!api?.autoMode?.followUpFeature) {
-        console.error("Follow-up feature API not available");
-        toast.error("Follow-up not available", {
-          description: "This feature is not available in the current version.",
-        });
-        return;
-      }
+    const api = getElectronAPI();
+    if (!api?.autoMode?.followUpFeature) {
+      console.error("Follow-up feature API not available");
+      toast.error("Follow-up not available", {
+        description: "This feature is not available in the current version.",
+      });
+      return;
+    }
 
-      // Move feature back to in_progress before sending follow-up
-      updateFeature(followUpFeature.id, { status: "in_progress", startedAt: new Date().toISOString() });
+    // Move feature back to in_progress before sending follow-up
+    updateFeature(featureId, { status: "in_progress", startedAt: new Date().toISOString() });
 
-      // Call the API to send follow-up prompt
-      const result = await api.autoMode.followUpFeature(
-        currentProject.path,
-        followUpFeature.id,
-        followUpPrompt,
-        followUpImagePaths.map(img => img.path)
-      );
+    // Reset follow-up state immediately (close dialog, clear form)
+    setShowFollowUpDialog(false);
+    setFollowUpFeature(null);
+    setFollowUpPrompt("");
+    setFollowUpImagePaths([]);
 
-      if (result.success) {
-        console.log("[Board] Follow-up started successfully");
-        toast.success("Follow-up started", {
-          description: `Continuing work on: ${followUpFeature.description.slice(0, 50)}${followUpFeature.description.length > 50 ? "..." : ""}`,
-        });
-        setShowFollowUpDialog(false);
-        setFollowUpFeature(null);
-        setFollowUpPrompt("");
-        setFollowUpImagePaths([]);
-      } else {
-        console.error("[Board] Failed to send follow-up:", result.error);
-        toast.error("Failed to send follow-up", {
-          description: result.error || "An error occurred",
-        });
-        await loadFeatures();
-      }
-    } catch (error) {
+    // Show success toast immediately
+    toast.success("Follow-up started", {
+      description: `Continuing work on: ${featureDescription.slice(0, 50)}${featureDescription.length > 50 ? "..." : ""}`,
+    });
+
+    // Call the API in the background (don't await - let it run async)
+    api.autoMode.followUpFeature(
+      currentProject.path,
+      featureId,
+      prompt,
+      imagePaths
+    ).catch((error) => {
       console.error("[Board] Error sending follow-up:", error);
       toast.error("Failed to send follow-up", {
         description: error instanceof Error ? error.message : "An error occurred",
       });
-      await loadFeatures();
-    }
+      // Reload features to revert status if there was an error
+      loadFeatures();
+    });
   };
 
   // Handle commit-only for waiting_approval features (marks as verified and commits)

app/src/lib/electron.ts

@@ -585,9 +585,11 @@ function createMockAutoModeAPI(): AutoModeAPI {
       mockRunningFeatures.add(featureId);
 
       // Simulate follow-up work (similar to run but with additional context)
+      // Note: We don't await this - it runs in the background like the real implementation
       simulateAutoModeLoop(projectPath, featureId);
 
-      return { success: true, passes: true };
+      // Return immediately so the modal can close (matches real implementation)
+      return { success: true };
     },
 
     commitFeature: async (projectPath: string, featureId: string) => {