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/server/src/services/feature-loader.ts

@@ -14,6 +14,8 @@ import {
 
 export interface Feature {
   id: string;
+  title?: string;
+  titleGenerating?: boolean;
   category: string;
   description: string;
   steps?: string[];