Phase 1: Add ESLint/Prettier config + baseline auto-fixes

dashcaddy-api/__tests__/update-manager.test.js

@@ -123,7 +123,7 @@ describe('configureAutoUpdate', () => {
     updateManager.configureAutoUpdate('c1', {
       enabled: true,
       schedule: 'daily',
-      securityOnly: true
+      securityOnly: true,
     });
     expect(updateManager.config.autoUpdate['c1'].schedule).toBe('daily');
     expect(updateManager.config.autoUpdate['c1'].securityOnly).toBe(true);