refactor: fix security hardcode, dead code, resource leaks, operator bugs

src/extension.ts

@@ -85,7 +85,9 @@ export async function activate(context: vscode.ExtensionContext) {
     }
 }
 
-export function deactivate() {}
+export function deactivate() {
+    HealthCheckMonitor.dispose();
+}
 
 async function runInitialSetup(context: vscode.ExtensionContext) {
     try {
@@ -138,7 +140,9 @@ async function _ensureBrainDir(context: vscode.ExtensionContext): Promise<string
         if (!fs.existsSync(dir)) {
             try {
                 fs.mkdirSync(dir, { recursive: true });
-            } catch (e) {}
+            } catch (e) {
+                logError('Failed to create brain directory.', e);
+            }
         }
         return dir;
     }
@@ -149,11 +153,10 @@ async function _ensureBrainDir(context: vscode.ExtensionContext): Promise<string
             fs.mkdirSync(defaultDir, { recursive: true });
             // Create a welcome file
             fs.writeFileSync(path.join(defaultDir, 'Welcome.md'), "# Welcome to your Second Brain\n\nAstra will store and retrieve knowledge from here.");
-        } catch (e) {}
+        } catch (e) {
+            logError('Failed to initialize default brain directory.', e);
+        }
     }
     return defaultDir;
 }
 
-/**
- * Astra Extension Entry Point
- */