- Standardized h2 elements: 19 instances from text-3xl/text-xl to text-2xl
- Standardized h3 elements: 4 instances from text-2xl to text-xl
- Established consistent hierarchy: h1(text-3xl), h2(text-2xl), h3(text-xl)
- Preserved special cases: demo pages, responsive patterns, stat value displays
- Created standardization plan document
- Task 7.1.2.3 complete
- Migrated all hooks: useAuth, useChat, useLogin
- Migrated all components: Header, ProfileForm, FollowButton, LikeButton, PlaylistFollowButton, ChatMessage, ChatMessages, CommentThread, CommentSection, PlaylistList, ChatSidebar, SettingsPage, DashboardPage
- Updated storeSelectors.ts useAuthUser() to use React Query
- All production code now uses useUser() hook instead of Zustand store
- Action 4.1.1.3 and 4.1.1.4 complete