feat: Implement phases 6 to 9 of the review cycle fix process, including discovery, batching, parallel planning, execution, and completion

- Added Phase 6: Fix Discovery & Batching with intelligent grouping and batching of findings.
- Added Phase 7: Fix Parallel Planning to launch planning agents for concurrent analysis and aggregation of partial plans.
- Added Phase 8: Fix Execution for stage-based execution of fixes with conservative test verification.
- Added Phase 9: Fix Completion to aggregate results, generate summary reports, and handle session completion.
- Introduced new frontend components: ResizeHandle for draggable resizing of sidebar panels and useResizablePanel hook for managing panel sizes with localStorage persistence.
- Added PowerShell script for checking TypeScript errors in source code, excluding test files.

ccw/frontend/src/pages/QueuePage.test.tsx

@@ -10,13 +10,13 @@ import { useWorkflowStore } from '@/stores/workflowStore';
 import type { IssueQueue } from '@/lib/api';
 
 // Mock queue data
-const mockQueueData: IssueQueue = {
+const mockQueueData = {
   tasks: ['task1', 'task2'],
   solutions: ['solution1'],
   conflicts: [],
-  execution_groups: { 'group-1': ['task1', 'task2'] },
-  grouped_items: { 'parallel-group': ['task1', 'task2'] },
-};
+  execution_groups: ['group-1'],
+  grouped_items: { 'parallel-group': [] as any[] },
+} satisfies IssueQueue;
 
 // Mock hooks at top level
 vi.mock('@/hooks', () => ({