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/commands.ts

@@ -16,7 +16,7 @@ export type Command =
 
 export function parseCommand(input: string): Command | null {
   const trimmed = input.trim();
-  if (!trimmed) return null;
+  if (!trimmed) {return null;}
 
   // Quit
   if (trimmed === '/quit' || trimmed === '/exit') {
@@ -65,12 +65,12 @@ export function parseCommand(input: string): Command | null {
   if (trimmed.startsWith('/model ')) {
     const args = trimmed.slice('/model '.length).trim();
     const parts = args.split(/\s+/);
-    
+
     // /model <tier> <provider/model> - change tier's provider/model
     if (parts.length === 2 && parts[1].includes('/')) {
       return { type: 'model', name: parts[0], providerModel: parts[1] };
     }
-    
+
     // /model <name> - single word (backward compatibility)
     const name = parts[0];
     return { type: 'model', name };
@@ -205,12 +205,12 @@ export const MODEL_TOOLTIPS: Record<string, string> = {
 
 export function getCommandCompletions(partial: string): string[] {
   const trimmed = partial.trim();
-  
+
   // Complete /model <tier> <provider/model>
   if (trimmed.startsWith('/model ')) {
     const args = trimmed.slice('/model '.length).trim();
     const parts = args.split(/\s+/);
-    
+
     if (parts.length === 1) {
       // Single word - suggest model aliases
       const modelPartial = parts[0].toLowerCase();
@@ -225,23 +225,23 @@ export function getCommandCompletions(partial: string): string[] {
         .map(provider => `/model ${parts[0]} ${provider}`);
     }
   }
-  
+
   // Complete slash commands
   if (trimmed.startsWith('/')) {
     return SLASH_COMMANDS.filter(cmd => cmd.startsWith(trimmed.toLowerCase()));
   }
-  
+
   return [];
 }
 
 export function getCommandTooltip(partial: string): string | null {
   const trimmed = partial.trim().toLowerCase();
-  
+
   // Tooltip for /model arguments
   if (trimmed.startsWith('/model ')) {
     const args = trimmed.slice('/model '.length).trim();
     const parts = args.split(/\s+/);
-    
+
     if (parts.length === 1) {
       // Single word - model tier or provider
       const modelArg = parts[0].toLowerCase();
@@ -261,15 +261,15 @@ export function getCommandTooltip(partial: string): string | null {
       if (matches.length === 1) {
         return `Enter provider/model (e.g. ${matches[0]}/...)`;
       }
-      return `Enter provider/model (e.g. anthropic/claude-sonnet-4)`;
+      return 'Enter provider/model (e.g. anthropic/claude-sonnet-4)';
     }
   }
-  
+
   // Exact match tooltip
   if (COMMAND_TOOLTIPS[trimmed]) {
     return COMMAND_TOOLTIPS[trimmed];
   }
-  
+
   // Partial match - show tooltip if only one command matches
   if (trimmed.startsWith('/')) {
     const matches = SLASH_COMMANDS.filter(cmd => cmd.startsWith(trimmed));
@@ -277,7 +277,7 @@ export function getCommandTooltip(partial: string): string | null {
       return COMMAND_TOOLTIPS[matches[0]];
     }
   }
-  
+
   return null;
 }