fix(build): resolve TypeScript errors and add missing dependencies

- Add missing zustand dependency to package.json
- Fix unused variable errors in ToolWidgets.tsx
- Remove invalid 'white' theme comparison in claudeSyntaxTheme.ts
- Add proper TypeScript types to stores using StateCreator pattern
- Add null checks and type casting in Settings.tsx filter operations
- Add onChange handler to Switch component to suppress React warning
- Add 'check' script for TypeScript validation

These changes ensure the TypeScript build passes without errors.

src/components/Settings.tsx

@@ -170,12 +170,12 @@ export const Settings: React.FC<SettingsProps> = ({
       const updatedSettings: ClaudeSettings = {
         ...settings,
         permissions: {
-          allow: allowRules.map(rule => rule.value).filter(v => v.trim()),
-          deny: denyRules.map(rule => rule.value).filter(v => v.trim()),
+          allow: allowRules.map(rule => rule.value).filter(v => v && String(v).trim()),
+          deny: denyRules.map(rule => rule.value).filter(v => v && String(v).trim()),
         },
         env: envVars.reduce((acc, { key, value }) => {
-          if (key.trim() && value.trim()) {
-            acc[key] = value;
+          if (key && String(key).trim() && value && String(value).trim()) {
+            acc[key] = String(value);
           }
           return acc;
         }, {} as Record<string, string>),

src/components/ToolWidgets.tsx

@@ -632,9 +632,6 @@ export const BashWidget: React.FC<{
   description?: string;
   result?: any;
 }> = ({ command, description, result }) => {
-  const { theme } = useTheme();
-  const syntaxTheme = getClaudeSyntaxTheme(theme);
-  
   // Extract result content if available
   let resultContent = '';
   let isError = false;

src/components/ui/switch.tsx

@@ -52,6 +52,7 @@ const Switch = React.forwardRef<HTMLInputElement, SwitchProps>(
           checked={checked}
           disabled={disabled}
           className="sr-only"
+          onChange={() => {}}
           {...props}
         />
       </button>