feat(storage): implement storage manager for centralized management and cleanup

- Added a new Storage Manager component to handle storage statistics, project cleanup, and configuration for CCW centralized storage.
- Introduced functions to calculate directory sizes, get project storage stats, and clean specific or all storage.
- Enhanced SQLiteStore with a public API for executing queries securely.
- Updated tests to utilize the new execute_query method and validate storage management functionalities.
- Improved performance by implementing connection pooling with idle timeout management in SQLiteStore.
- Added new fields (token_count, symbol_type) to the symbols table and adjusted related insertions.
- Enhanced error handling and logging for storage operations.

ccw/src/templates/dashboard-js/views/cli-manager.js

@@ -297,6 +297,10 @@ async function renderCliManager() {
   if (statsGrid) statsGrid.style.display = 'none';
   if (searchInput) searchInput.parentElement.style.display = 'none';
 
+  // Show storage card (only visible in CLI Manager view)
+  var storageCard = document.getElementById('storageCard');
+  if (storageCard) storageCard.style.display = '';
+
   // Load data (including CodexLens status for tools section)
   await Promise.all([
     loadCliToolStatus(),
@@ -320,6 +324,11 @@ async function renderCliManager() {
   renderCliSettingsSection();
   renderCcwEndpointToolsSection();
 
+  // Initialize storage manager card
+  if (typeof initStorageManager === 'function') {
+    initStorageManager();
+  }
+
   // Initialize Lucide icons
   if (window.lucide) lucide.createIcons();
 }