fix: add mounted check after async gap in OTP resend

[Priyanshu-byte-coder]

Summary

Closes #224

ScaffoldMessenger.of(context) was called after await resendVerificationEmail() in verify_otp_screen.dart without checking if (mounted). If the user navigated back while the async call was in flight, the widget would be disposed and calling ScaffoldMessenger.of(context) would crash with: "Looking up a deactivated widget's ancestor is unsafe".

Fix

Added if (!mounted) return; immediately after the await and before any context usage in the resend flow.

// Before
final result = await _supabaseService.resendVerificationEmail(...);
if (result['success']) {
  ScaffoldMessenger.of(context).showSnackBar(...); // ❌ no mounted check

// After
final result = await _supabaseService.resendVerificationEmail(...);
if (!mounted) return; // ✅ guard added
if (result['success']) {
  ScaffoldMessenger.of(context).showSnackBar(...);

File changed

• lib/screens/auth/verify_otp_screen.dart — line 204 (after resend await)

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Reviewing files that changed from the base of the PR and between 1cea2a6 and 076c91f.

📒 Files selected for processing (1)

• lib/screens/auth/verify_otp_screen.dart

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