fix: add missing Alpine variables to JS components

- Add scanDropdownOpen to code-quality-dashboard.js
- Add error variable to notifications.js

These variables are required by templates but were missing from JS.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

static/admin/js/code-quality-dashboard.js

@@ -22,6 +22,7 @@ function codeQualityDashboard() {
         // Dashboard-specific data
         loading: false,
         scanning: false,
+        scanDropdownOpen: false,
         error: null,
         successMessage: null,
         scanProgress: null,  // Progress message during scan

static/admin/js/notifications.js

@@ -19,6 +19,7 @@ function adminNotifications() {
 
         // Loading states
         loading: true,
+        error: null,
         loadingNotifications: false,
         loadingAlerts: false,