ESLint --fix: auto-fix brace-style, indent, semi, no-trailing-spaces

Run eslint --fix across src/ to clear ~1900 mechanical lint errors
surfaced by the @typescript-eslint v8 + react-hooks v7 + react-compiler
upgrade in the React 19 modernization PR.

Issues fixed automatically:
- brace-style (Allman): try/catch one-liners reformatted to multi-line
- indent: tab-vs-space and depth corrections
- semi: missing trailing semicolons
- no-trailing-spaces

No semantic changes. Remaining 701 errors are real-code issues
(set-state-in-effect, rules-of-hooks, no-unsafe-* type checks) that
need manual per-file review.

https://claude.ai/code/session_01GrR87LAqnAEyKG2ZbmQt5Q

src/components/furni-editor/FurniEditorView.tsx

@@ -93,9 +93,9 @@ export const FurniEditorView: FC<{}> = () =>
             loadBySpriteId(spriteId);
         };
 
-        window.addEventListener('furni-editor:open', handler as EventListener);
+        window.addEventListener('furni-editor:open', handler);
 
-        return () => window.removeEventListener('furni-editor:open', handler as EventListener);
+        return () => window.removeEventListener('furni-editor:open', handler);
     }, [ isMod, loadBySpriteId ]);
 
     const handleSelect = useCallback((id: number) =>