chore: Fix all 246 TypeScript errors in UI

- Extended SetupAPI interface with 20+ missing methods for Cursor, Codex,
  OpenCode, Gemini, and Copilot CLI integrations
- Fixed WorktreeInfo type to include isCurrent and hasWorktree fields
- Added null checks for optional API properties across all hooks
- Fixed Feature type conflicts between @automaker/types and local definitions
- Added missing CLI status hooks for all providers
- Fixed type mismatches in mutation callbacks and event handlers
- Removed dead code referencing non-existent GlobalSettings properties
- Updated mock implementations in electron.ts for all new API methods

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

apps/ui/src/components/views/board-view/kanban-board.tsx

@@ -6,6 +6,7 @@ import {
   useEffect,
   type RefObject,
   type ReactNode,
+  type UIEvent,
 } from 'react';
 import { DragOverlay } from '@dnd-kit/core';
 import { SortableContext, verticalListSortingStrategy } from '@dnd-kit/sortable';
@@ -79,7 +80,7 @@ const REDUCED_CARD_OPACITY_PERCENT = 85;
 type VirtualListItem = { id: string };
 
 interface VirtualListState<Item extends VirtualListItem> {
-  contentRef: RefObject<HTMLDivElement>;
+  contentRef: RefObject<HTMLDivElement | null>;
   onScroll: (event: UIEvent<HTMLDivElement>) => void;
   itemIds: string[];
   visibleItems: Item[];