feat: add auto-generated titles for features

- Add POST /features/generate-title endpoint using Claude Haiku
- Generate concise titles (5-10 words) from feature descriptions
- Display titles in kanban cards with loading state
- Add optional title field to add/edit feature dialogs
- Auto-generate titles when description provided but title empty
- Add 'Pull & Resolve Conflicts' action to worktree dropdown
- Show running agents count in board header (X / Y format)
- Update Feature interface to include title and titleGenerating fields

apps/ui/src/lib/electron.ts

@@ -203,6 +203,9 @@ export interface FeaturesAPI {
     projectPath: string,
     featureId: string
   ) => Promise<{ success: boolean; content?: string | null; error?: string }>;
+  generateTitle: (
+    description: string
+  ) => Promise<{ success: boolean; title?: string; error?: string }>;
 }
 
 export interface AutoModeAPI {
@@ -2606,6 +2609,14 @@ function createMockFeaturesAPI(): FeaturesAPI {
       const content = mockFileSystem[agentOutputPath];
       return { success: true, content: content || null };
     },
+
+    generateTitle: async (description: string) => {
+      console.log("[Mock] Generating title for:", description.substring(0, 50));
+      // Mock title generation - just take first few words
+      const words = description.split(/\s+/).slice(0, 6).join(" ");
+      const title = words.length > 40 ? words.substring(0, 40) + "..." : words;
+      return { success: true, title: `Add ${title}` };
+    },
   };
 }