feat: enhance settings view and feature defaults management

- Introduced default feature model settings in the settings view, allowing users to specify the default AI model for new feature cards.
- Updated navigation to include a direct link to model defaults in the settings menu.
- Enhanced the Add Feature dialog to utilize the default feature model from the app store.
- Implemented synchronization of the default feature model in settings migration and sync hooks.
- Improved UI components to reflect changes in default settings, ensuring a cohesive user experience.

apps/ui/src/components/views/settings-view.tsx

@@ -1,6 +1,6 @@
 import { useState } from 'react';
+import { useSearch } from '@tanstack/react-router';
 import { useAppStore } from '@/store/app-store';
-import { useSetupStore } from '@/store/setup-store';
 
 import { useSettingsView, type SettingsViewId } from './settings-view/hooks';
 import { NAV_ITEMS } from './settings-view/config/navigation';
@@ -51,6 +51,8 @@ export function SettingsView() {
     setDefaultPlanningMode,
     defaultRequirePlanApproval,
     setDefaultRequirePlanApproval,
+    defaultFeatureModel,
+    setDefaultFeatureModel,
     autoLoadClaudeMd,
     setAutoLoadClaudeMd,
     promptCustomization,
@@ -86,8 +88,11 @@ export function SettingsView() {
     }
   };
 
+  // Get initial view from URL search params
+  const { view: initialView } = useSearch({ from: '/settings' });
+
   // Use settings view navigation hook
-  const { activeView, navigateTo } = useSettingsView();
+  const { activeView, navigateTo } = useSettingsView({ initialView });
 
   // Handle navigation - if navigating to 'providers', default to 'claude-provider'
   const handleNavigate = (viewId: SettingsViewId) => {
@@ -152,11 +157,13 @@ export function SettingsView() {
             skipVerificationInAutoMode={skipVerificationInAutoMode}
             defaultPlanningMode={defaultPlanningMode}
             defaultRequirePlanApproval={defaultRequirePlanApproval}
+            defaultFeatureModel={defaultFeatureModel}
             onDefaultSkipTestsChange={setDefaultSkipTests}
             onEnableDependencyBlockingChange={setEnableDependencyBlocking}
             onSkipVerificationInAutoModeChange={setSkipVerificationInAutoMode}
             onDefaultPlanningModeChange={setDefaultPlanningMode}
             onDefaultRequirePlanApprovalChange={setDefaultRequirePlanApproval}
+            onDefaultFeatureModelChange={setDefaultFeatureModel}
           />
         );
       case 'worktrees':