fix(timer): prevent division by zero in progress calculation and sanitize negative settings input (#28)

* feat(core): add auth layout template, custom textfield and colors

* feat(auth): implement viewmodels for auth flow (MVVM)

* feat(auth): build complete auth UI screens (Login, Register, OTP, Passwords)

* chore(main): set LoginView as initial route

* refactor(auth) : delete .gitkeep

* chore: update dependencies and pubspec.lock

* refactor(auth): optimize registration logic, timezone handling, and form validation

* feat(auth): update UI for login, registration, and forgot password screens

* feat(tasks): update task management UI and statistics screen

* chore: update main entry point and fix widget tests

* chore: ignore devtools_options.yaml

* chore: ignore devtools_options.yaml

* style(login) : rewrite title for login view

* feat(auth): configure android deep link for supabase oauth

* refactor(ui): add social login callbacks to auth layout template

* feat(auth): update oauth methods with redirect url and signout

* feat(auth): implement AuthGate using StreamBuilder for session tracking

* feat(viewmodel): add oauth logic and improve provider lifecycle

* refactor(ui): migrate LoginView to Provider pattern

* chore(main): set AuthGate as initial route and setup provider

* feat: implement full Focus feature set

- Added Pomodoro timer with Start/Reset/Skip logic.
- Integrated local Quick Notes with Pin/Delete functionality.
- Supported image attachments in notes using image_picker.
- Added Focus settings: time duration, vibration, and ringtones.

* fix (auth) : dispose TextEditingControllers to prevent memory leaks

* refactor (alarm ) : create off alarm button  when time out

* fix: apply CodeRabbit auto-fixes

Fixed 3 file(s) based on 4 unresolved review comments.

Co-authored-by: CodeRabbit <[email protected]>

* fix(timer): prevent division by zero in progress calculation and sanitize negative settings input

* fix(timer): prevent division by zero in progress calculation and sanitize negative settings input

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: CodeRabbit <[email protected]>

Author: 3 people

src/lib/features/note/viewmodel/focus_viewmodel.dart

@@ -151,7 +151,7 @@ class FocusViewModel extends ChangeNotifier {
   }
 
   // Calculate progress for the circular indicator
-  double get progress => timeRemaining / totalTime;
+  double get progress => totalTime <= 0 ? 0.0 : (timeRemaining / totalTime).clamp(0.0, 1.0);
 
   // --- TIMER OPERATIONS ---
 
@@ -221,6 +221,11 @@ class FocusViewModel extends ChangeNotifier {
 
   // Update preferences from the settings dialog
   void updateSettings({required int newPomodoroMinutes, required int newBreakMinutes, required bool vibrate, required int ringtone}) {
+    if (newPomodoroMinutes <= 0 || newBreakMinutes <= 0) {
+      debugPrint('Lỗi: Thời gian cài đặt phải lớn hơn 0 phút. Đã tự động set về 1.');
+      newPomodoroMinutes = newPomodoroMinutes <= 0 ? 1 : newPomodoroMinutes;
+      newBreakMinutes = newBreakMinutes <= 0 ? 1 : newBreakMinutes;
+    }
     stopAlarm(); // Stop alarm if opening settings
     pomodoroTime = newPomodoroMinutes * 60;
     shortBreakTime = newBreakMinutes * 60;