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;