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/frontends/tui/minimal.ts

@@ -63,21 +63,21 @@ export class MinimalTui {
 
     const completions = getCommandCompletions(line);
     const tooltip = getCommandTooltip(line);
-    
+
     let hint = '';
-    
+
     if (completions.length === 1 && completions[0] !== line) {
       // Show the remaining part of the completion as a hint
       hint = completions[0].slice(line.length);
     }
-    
+
     // Add tooltip if available
     if (tooltip) {
       hint += `  ${colors.gray}— ${tooltip}${colors.reset}`;
     } else if (completions.length > 1) {
       hint += `  ${colors.gray}[${completions.length} options, Tab to complete]${colors.reset}`;
     }
-    
+
     if (hint && hint !== this.currentHint) {
       this.clearHint();
       this.currentHint = hint;
@@ -467,7 +467,7 @@ export class MinimalTui {
             fullContent += event.content;
           }
           if (event.type === 'fallback_warning' && event.fallbackReason) {
-            console.warn(`\n⚠ Using fallback model`);
+            console.warn('\n⚠ Using fallback model');
           }
           if (event.type === 'done' && event.usage) {
             this.totalUsage.inputTokens += event.usage.inputTokens;