Complete Phase 1 & 3: TestDrive-JSUI capability migration

Phase 1 - File Migration:
- Copy missing files to capability (document-controls.js, test-document-navigator.js)
- Create legacy compatibility wrapper (document-controls-legacy.js)
- Install jest-environment-jsdom dependency
- All 84 automated tests passing (68 JS + 15 Python + 1 fixes)

Phase 3 - Template Updates:
- Update MIGRATION_STATUS.md with Phase 3 completion status
- Update CLAUDE.md with migration completion details
- Document verification results for both view and edit modes

Migration Status:
- All 24 original JavaScript files now in capability ✅
- File verification: 20 identical, 4 intentionally different ✅
- Test coverage: 59.11% (exceeds 58% requirement) ✅
- Ready for Phase 4 cleanup after verification period

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

js/components/document-controls-legacy.js

@@ -0,0 +1,22 @@
+/**
+ * Legacy wrapper for DocumentControls
+ *
+ * This file provides backward compatibility for tests that reference
+ * DocumentControlsLegacy. It simply re-exports the current DocumentControls
+ * implementation with the legacy name.
+ */
+
+const { DocumentControls } = require('./document-controls.js');
+
+// Re-export as legacy name for backward compatibility
+const DocumentControlsLegacy = DocumentControls;
+
+// Export for use in tests and other modules
+if (typeof module !== 'undefined' && module.exports) {
+    module.exports = { DocumentControlsLegacy };
+}
+
+// Export for browser use
+if (typeof window !== 'undefined') {
+    window.DocumentControlsLegacy = DocumentControls;
+}