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/utils/html.ts

@@ -21,7 +21,7 @@ const NAMED_ENTITIES: Record<string, string> = {
 function decodeEntity(entity: string): string {
   // Named entity
   const named = NAMED_ENTITIES[entity.toLowerCase()];
-  if (named) return named;
+  if (named) {return named;}
 
   // Decimal numeric entity: &#NNN;
   const decMatch = entity.match(/^&#(\d+);$/);
@@ -52,7 +52,7 @@ function decodeEntity(entity: string): string {
  * @returns Clean plain text
  */
 export function sanitizeHtml(text: string): string {
-  if (!text) return '';
+  if (!text) {return '';}
 
   let result = text;