feat: implement user profile management

prompt/user_profile_prompt.md

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+### Prompt Final for User Profile Implementation
+
+# 🚀 Next Steps: Complete Phase 2 (User Profile Management)
+**Status:** Starting implementation now
+
+## 📊 Task Priorities (Phase 2 - High Priority)
+*(Deadline: 2026-04-12)*
+
+1. **Profile Page (Profile.tsx)**
+   - Implement user profile page with editable form
+   - Use `useProfile` hook for data
+   - Deadline: 2026-04-10
+
+2. **Settings Layout (SettingsLayout.tsx)**
+   - Create sidebar navigation for settings
+   - Include links to all settings pages
+   - Deadline: 2026-04-11
+
+3. **Settings Pages (SettingsProfile/SettingsPassword)**
+   - Editable forms with validation
+   - Password change with strength checks
+   - Deadline: 2026-04-12
+
+4. **Header Dropdown Menu
+   - Add profile/settings links in header
+   - Dropdown with animations
+   - Deadline: 2026-04-10
+
+5. **Protected Routes for /settings/
+   - Auth guard for all settings pages
+   - Test redirect to login
+
+## 💡 Technical Notes
+- **Framework:** React + TypeScript
+- **Hooks:** `useProfile` (already implemented)
+- **Testing:** Playwright E2E tests required
+
+**Team:** Frontend developers (assign to @frontend-dev primary)