fix: enable password manager autofill for all password fields (#8295)

- Added autofillHints to password fields in sign-in, password setup, and password change screens
- Enables password managers (1Password, LastPass, Bitwarden, etc.) to detect and autofill password fields
- Minimal change: only added AutofillHints.password property to 8 password fields across 4 files

Author: TirthDhandhukia30

frontend/appflowy_flutter/lib/user/presentation/screens/sign_in_screen/widgets/continue_with/continue_with_password_page.dart

@@ -133,6 +133,7 @@ class _ContinueWithPasswordPageState extends State<ContinueWithPasswordPage> {
         hintText: LocaleKeys.signIn_enterPassword.tr(),
         autoFocus: true,
         obscureText: true,
+        autofillHints: const [AutofillHints.password],
         suffixIconConstraints: BoxConstraints.tightFor(
           width: iconSize + theme.spacing.m,
           height: iconSize,

frontend/appflowy_flutter/lib/user/presentation/screens/sign_in_screen/widgets/continue_with/set_new_password.dart

@@ -145,6 +145,7 @@ class _SetNewPasswordWidgetState extends State<SetNewPasswordWidget> {
           key: newPasswordKey,
           controller: newPasswordController,
           obscureText: true,
+          autofillHints: const [AutofillHints.password],
           hintText: LocaleKeys.signIn_enterNewPassword.tr(),
           onSubmitted: (_) => _validateAndSubmit(),
         ),
@@ -160,6 +161,7 @@ class _SetNewPasswordWidgetState extends State<SetNewPasswordWidget> {
           key: confirmPasswordKey,
           controller: confirmPasswordController,
           obscureText: true,
+          autofillHints: const [AutofillHints.password],
           hintText: LocaleKeys.signIn_confirmNewPassword.tr(),
           onSubmitted: (_) => _validateAndSubmit(),
         ),

frontend/appflowy_flutter/lib/workspace/presentation/settings/pages/account/password/change_password.dart

@@ -141,6 +141,7 @@ class _ChangePasswordDialogContentState
             .tr(),
         keyboardType: TextInputType.visiblePassword,
         obscureText: true,
+        autofillHints: const [AutofillHints.password],
         suffixIconConstraints: BoxConstraints.tightFor(
           width: iconSize + theme.spacing.m,
           height: iconSize,
@@ -173,6 +174,7 @@ class _ChangePasswordDialogContentState
             .tr(),
         keyboardType: TextInputType.visiblePassword,
         obscureText: true,
+        autofillHints: const [AutofillHints.password],
         suffixIconConstraints: BoxConstraints.tightFor(
           width: iconSize + theme.spacing.m,
           height: iconSize,
@@ -205,6 +207,7 @@ class _ChangePasswordDialogContentState
             .tr(),
         keyboardType: TextInputType.visiblePassword,
         obscureText: true,
+        autofillHints: const [AutofillHints.password],
         suffixIconConstraints: BoxConstraints.tightFor(
           width: iconSize + theme.spacing.m,
           height: iconSize,

frontend/appflowy_flutter/lib/workspace/presentation/settings/pages/account/password/setup_password.dart

@@ -136,6 +136,7 @@ class _SetupPasswordDialogContentState
             .tr(),
         keyboardType: TextInputType.visiblePassword,
         obscureText: true,
+        autofillHints: const [AutofillHints.password],
         suffixIconConstraints: BoxConstraints.tightFor(
           width: iconSize + theme.spacing.m,
           height: iconSize,
@@ -168,6 +169,7 @@ class _SetupPasswordDialogContentState
             .tr(),
         keyboardType: TextInputType.visiblePassword,
         obscureText: true,
+        autofillHints: const [AutofillHints.password],
         suffixIconConstraints: BoxConstraints.tightFor(
           width: iconSize + theme.spacing.m,
           height: iconSize,