Add password reset feature for iOS and Android with deep link support

Implemented complete password reset flow with email verification and deep linking:

iOS (SwiftUI):
- PasswordResetViewModel: Manages 3-step flow (request, verify, reset) with deep link support
- ForgotPasswordView: Email entry screen with success/error states
- VerifyResetCodeView: 6-digit code verification with resend option
- ResetPasswordView: Password reset with live validation and strength indicators
- PasswordResetFlow: Container managing navigation between screens
- Deep link handling in iOSApp.swift for mycrib://reset-password?token=xxx
- Info.plist: Added CFBundleURLTypes for deep link scheme

Android (Compose):
- PasswordResetViewModel: StateFlow-based state management with coroutines
- ForgotPasswordScreen: Material3 email entry with auto-navigation
- VerifyResetCodeScreen: Code verification with Material3 design
- ResetPasswordScreen: Password reset with live validation checklist
- Deep link handling in MainActivity.kt and AndroidManifest.xml
- Token cleanup callback to prevent reusing expired deep link tokens
- Shared ViewModel scoping across all password reset screens
- Improved error handling for Django validation errors

Shared:
- Routes: Added ForgotPasswordRoute, VerifyResetCodeRoute, ResetPasswordRoute
- AuthApi: Enhanced resetPassword with Django validation error parsing
- User models: Added password reset request/response models

Security features:
- Deep link tokens expire after use
- Proper token validation on backend
- Session invalidation after password change
- Password strength requirements enforced

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

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

composeApp/src/androidMain/AndroidManifest.xml

@@ -19,6 +19,18 @@
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
+
+            <!-- Deep link for password reset -->
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+                <category android:name="android.intent.category.BROWSABLE" />
+
+                <data
+                    android:scheme="mycrib"
+                    android:host="reset-password" />
+            </intent-filter>
         </activity>
     </application>