feat(ui): add profiles-only mode to simplify model selection

Adds a new setting to show only AI profiles by default, hiding advanced
model tweaking options (Claude SDK, thinking levels, Codex) for a cleaner
UI. Users can toggle advanced options when needed via "Show Advanced" button.

- Added showProfilesOnly setting in app store and settings view
- Modified board-view dialogs to conditionally hide advanced options
- Added toggle buttons to temporarily show advanced options in both
  add and edit feature modals
- Enhanced settings view with proper icons and descriptions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4 <noreply@anthropic.com>

app/src/store/app-store.ts

@@ -192,6 +192,9 @@ export interface AppState {
   // AI Profiles
   aiProfiles: AIProfile[];
 
+  // Profile Display Settings
+  showProfilesOnly: boolean; // When true, hide model tweaking options and show only profile selection
+
   // Project Analysis
   projectAnalysis: ProjectAnalysis | null;
   isAnalyzing: boolean;
@@ -283,6 +286,9 @@ export interface AppActions {
   // Worktree Settings actions
   setUseWorktrees: (enabled: boolean) => void;
 
+  // Profile Display Settings actions
+  setShowProfilesOnly: (enabled: boolean) => void;
+
   // AI Profile actions
   addAIProfile: (profile: Omit<AIProfile, "id">) => void;
   updateAIProfile: (id: string, updates: Partial<AIProfile>) => void;
@@ -377,6 +383,7 @@ const initialState: AppState = {
   kanbanCardDetailLevel: "standard", // Default to standard detail level
   defaultSkipTests: false, // Default to TDD mode (tests enabled)
   useWorktrees: false, // Default to disabled (worktree feature is experimental)
+  showProfilesOnly: false, // Default to showing all options (not profiles only)
   aiProfiles: DEFAULT_AI_PROFILES,
   projectAnalysis: null,
   isAnalyzing: false,
@@ -711,6 +718,9 @@ export const useAppStore = create<AppState & AppActions>()(
       // Worktree Settings actions
       setUseWorktrees: (enabled) => set({ useWorktrees: enabled }),
 
+      // Profile Display Settings actions
+      setShowProfilesOnly: (enabled) => set({ showProfilesOnly: enabled }),
+
       // AI Profile actions
       addAIProfile: (profile) => {
         const id = `profile-${Date.now()}-${Math.random()
@@ -766,6 +776,7 @@ export const useAppStore = create<AppState & AppActions>()(
         kanbanCardDetailLevel: state.kanbanCardDetailLevel,
         defaultSkipTests: state.defaultSkipTests,
         useWorktrees: state.useWorktrees,
+        showProfilesOnly: state.showProfilesOnly,
         aiProfiles: state.aiProfiles,
       }),
     }