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/orchestrator/InteractionModeToggle.tsx

@@ -0,0 +1,51 @@
+// ========================================
+// Interaction Mode Toggle Component
+// ========================================
+// Pan/Selection mode toggle for the orchestrator canvas
+
+import { useIntl } from 'react-intl';
+import { Hand, MousePointerClick } from 'lucide-react';
+import { cn } from '@/lib/utils';
+import { useFlowStore } from '@/stores';
+
+interface InteractionModeToggleProps {
+  disabled?: boolean;
+}
+
+export function InteractionModeToggle({ disabled = false }: InteractionModeToggleProps) {
+  const { formatMessage } = useIntl();
+  const interactionMode = useFlowStore((state) => state.interactionMode);
+  const toggleInteractionMode = useFlowStore((state) => state.toggleInteractionMode);
+
+  return (
+    <div className={cn(
+      'flex items-center gap-1 bg-card/90 backdrop-blur-sm border border-border rounded-lg p-1 shadow-sm',
+      disabled && 'opacity-50 pointer-events-none'
+    )}>
+      <button
+        onClick={() => { if (interactionMode !== 'pan') toggleInteractionMode(); }}
+        className={cn(
+          'flex items-center gap-1.5 px-2 py-1 rounded-md text-xs font-medium transition-colors',
+          interactionMode === 'pan'
+            ? 'bg-primary text-primary-foreground'
+            : 'text-muted-foreground hover:text-foreground hover:bg-muted'
+        )}
+        title={formatMessage({ id: 'orchestrator.canvas.panMode', defaultMessage: 'Pan mode (drag to move canvas)' })}
+      >
+        <Hand className="w-3.5 h-3.5" />
+      </button>
+      <button
+        onClick={() => { if (interactionMode !== 'selection') toggleInteractionMode(); }}
+        className={cn(
+          'flex items-center gap-1.5 px-2 py-1 rounded-md text-xs font-medium transition-colors',
+          interactionMode === 'selection'
+            ? 'bg-primary text-primary-foreground'
+            : 'text-muted-foreground hover:text-foreground hover:bg-muted'
+        )}
+        title={formatMessage({ id: 'orchestrator.canvas.selectionMode', defaultMessage: 'Selection mode (drag to select nodes)' })}
+      >
+        <MousePointerClick className="w-3.5 h-3.5" />
+      </button>
+    </div>
+  );
+}