style: auto-fix ESLint issues (curly braces and formatting)

- Add curly braces to all if/else/for/while statements
- Fix indentation and trailing spaces
- Auto-fixed 372 linting errors using eslint --fix
- Remaining issues are warnings only (non-null assertions, explicit any types)

src/gateway/ui/pages/settings.js

@@ -15,7 +15,7 @@ let _client = null;
 let _el = null;
 
 async function loadSettings() {
-  if (!_client || !_el) return;
+  if (!_client || !_el) {return;}
 
   let config, tools, channels;
 
@@ -154,7 +154,7 @@ async function saveHooks() {
 
   // Clear status after 5s
   setTimeout(() => {
-    if (status) status.textContent = '';
+    if (status) {status.textContent = '';}
   }, 5000);
 }