Feat: build 18

[destucr]

🎯 Summary

This pull request enhances user feedback during authentication and synchronization, improves role-based data management, and strengthens UI responsiveness and state handling throughout the app.

✨ Features/Changes

Authentication and User Feedback

• Added isLoading property to AuthenticationService and updated async methods (signInWithApple, updateUserRole, updateUserName, createRoom, deleteAccount, joinRoom) to reflect loading state.
• Updated SignInView and ProfileView to show loading indicators and disable buttons during authentication operations.

Synchronization State Management

• Added isSyncing property to HeartbeatSyncManager to track sync status.
• Updated HeartbeatSoundManager to observe HeartbeatSyncManager's isSyncing property via Combine for real-time UI updates.

Role-Based Data Management

• Account deletion now only removes shared heartbeat and moment data if the user is not a father.
• Fathers logging in now fetch the mother's pregnancy weeks using the room code, exposed via partnerPregnancyWeeks in AuthenticationService.

Debugging and Diagnostics

• Added detailed debug print statements in key setup and sync methods to aid development.

UI Responsiveness and State Handling

• Improved ProfileView with modal overlay and progress indicator during account deletion.
• Disabled UI elements appropriately during loading and sync states.

📁 Files Changed

• AuthenticationService.swift – Added isLoading, partnerPregnancyWeeks, and debug prints.
• HeartbeatSyncManager.swift – Added isSyncing.
• HeartbeatSoundManager.swift – Observes isSyncing for real-time updates.
• SignInView.swift – Shows loading indicators.
• ProfileView.swift – Improved loading UI, account deletion overlay, and button states.
• Other supporting files for role-based logic and debug prints.

🔧 Usage Examples (if applicable)

// Show loading during sign-in
authService.isLoading // true during async operation

// Observe sync state
heartbeatSyncManager.isSyncing

// Access father's partner pregnancy weeks
authService.partnerPregnancyWeeks