Integrated Club Verification Screen with Firebase

[prashant273000]

What does this PR do?

Integrates ClubVerificationScreen into the app's navigation flow, replacing the previous placeholder. Adds status-check logic that calls UserRepository.fetchClubVerificationStatus and surfaces the result to the user via a Snackbar, and automatically navigates approved club admins to ClubDashboard.

Related Issue

Closes: #34

Brief Explanation of Approach

1. ClubVerificationViewModel now injects UserRepository and uses FirebaseAuth.getInstance() to get the current admin's uid. onCheckStatusClick was changed to accept two callbacks - onApproved: () -> Unit and onMessage: (String) -> Unit — instead of the screen inferring a message itself from isVerified. Inside the ViewModel:

2. Sets isLoading = true, calls userRepository.fetchClubVerificationStatus(uid).

3. Updates ClubVerificationUiState with the new verificationStatus field (added alongside the existing isVerified flag) and isLoading = false.
   Branches on the returned status string:

4. "approved" → fires onMessage("Verification Successful!") then onApproved().
   "pending" → fires a "still pending" message, no navigation.
   "rejected" → fires a "contact support" message, no navigation.
   any other value → falls back to showing the raw status.

5. Wraps the call in try/catch so network/Firestore failures reset isLoading and tell us an error message via onMessage..

6. ClubVerificationScreen was simplified to just pass these two callbacks through to the ViewModel, with onMessage launching a coroutine to show the Snackbar - removing the screen's own logic for deciding what message to display.
   In MainActivity, the ClubVerificationScreen entry now passes:

onNavigationBack = { backStack.removeLast() }
onNavigateToDashboard = { backStack.clear(); backStack.add(ScreenRoute.App.ClubDashboard) }

Additional Notes

1. uid is fetched via auth.currentUser?.uid ?: return - if there's no signed-in use

2. Added error handling which is now in place for the status-fetch call (catch (e: Exception) → onMessage("Error checking status: ${e.message}")).

3. isVerified is retained in ClubVerificationUiState along with the new verificationStatus field .

[nirvan73]

@prashant273000 Please address the reviews left

[prashant273000]

I have addressed all the reviews.