Enhance logging and error handling in dashboard scripts

- Added detailed console logs in api.js to trace the execution flow during data loading and UI updates.
- Improved logging in main.js to monitor the initialization process and server mode data loading.
- Updated explorer.js to clarify the definition of defaultCliTool, indicating its location in another module.

ccw/src/core/server.js

@@ -604,7 +604,7 @@ export async function startServer(options = {}) {
           const content = readFileSync(assetPath);
           res.writeHead(200, {
             'Content-Type': contentType,
-            'Cache-Control': 'public, max-age=31536000'
+            'Cache-Control': 'no-cache, must-revalidate'
           });
           res.end(content);
           return;

ccw/src/templates/dashboard-js/views/explorer.js

@@ -13,7 +13,7 @@ let explorerExpandedDirs = new Set();
 let updateTaskQueue = [];
 let isTaskQueueVisible = false;
 let isTaskRunning = false;
-let defaultCliTool = 'gemini'; // Default CLI tool for updates
+// Note: defaultCliTool is defined in components/cli-status.js
 
 
 /**