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/models/retry.test.ts

@@ -134,7 +134,7 @@ describe('withRetry', () => {
     let callCount = 0;
     const fn = vi.fn().mockImplementation(() => {
       callCount++;
-      if (callCount < 3) return Promise.reject(new Error('fail'));
+      if (callCount < 3) {return Promise.reject(new Error('fail'));}
       return Promise.resolve('ok');
     });
 
@@ -166,7 +166,7 @@ describe('withRetry', () => {
 
     const fn = vi.fn().mockImplementation(() => {
       timestamps.push(Date.now());
-      if (timestamps.length < 3) return Promise.reject(new Error('fail'));
+      if (timestamps.length < 3) {return Promise.reject(new Error('fail'));}
       return Promise.resolve('ok');
     });