Add comprehensive tests for schema cleanup migration and search comparison

- Implement tests for migration 005 to verify removal of deprecated fields in the database schema.
- Ensure that new databases are created with a clean schema.
- Validate that keywords are correctly extracted from the normalized file_keywords table.
- Test symbol insertion without deprecated fields and subdir operations without direct_files.
- Create a detailed search comparison test to evaluate vector search vs hybrid search performance.
- Add a script for reindexing projects to extract code relationships and verify GraphAnalyzer functionality.
- Include a test script to check TreeSitter parser availability and relationship extraction from sample files.

ccw/src/templates/dashboard-js/components/navigation.js

@@ -293,8 +293,9 @@ function showRefreshToast(message, type) {
   toast.textContent = message;
   document.body.appendChild(toast);
 
+  // Increase display time to 3.5 seconds for better visibility
   setTimeout(() => {
     toast.classList.add('fade-out');
     setTimeout(() => toast.remove(), 300);
-  }, 2000);
+  }, 3500);
 }