fix(auth): 登录注册与手机号登录键盘避让

lib/pages/auth/auth_view.dart

@@ -8,6 +8,7 @@ import 'package:provider/provider.dart';
 import '../../core/data/remote/api_client.dart';
 import '../../core/data/services/auth_controller.dart';
 import '../../core/platform/haptics.dart';
+import '../../core/platform/keyboard_inset.dart';
 import '../../core/theme/app_colors.dart';
 import '../../core/theme/app_dimens.dart';
 import '../../core/theme/app_theme.dart';
@@ -101,6 +102,9 @@ class _AuthPageState extends State<AuthPage> {
   late final TextEditingController _passwordController;
   late final FocusNode _emailFocus;
   late final FocusNode _passwordFocus;
+  late final ScrollController _scrollController;
+  final _keyboardInset = KeyboardInsetNotifier.instance;
+  double _lastKeyboardInset = 0;
   bool _obscurePassword = true;
   bool _emailEntryOpen = false;
 
@@ -112,17 +116,87 @@ class _AuthPageState extends State<AuthPage> {
     _passwordController = TextEditingController();
     _emailFocus = FocusNode(debugLabel: 'auth-email-focus');
     _passwordFocus = FocusNode(debugLabel: 'auth-password-focus');
+    _scrollController = ScrollController();
+    _emailFocus.addListener(_onFocusChanged);
+    _passwordFocus.addListener(_onFocusChanged);
+    _keyboardInset.addListener(_onKeyboardInsetChanged);
+    unawaited(_keyboardInset.start());
+  }
+
+  @override
+  void didChangeDependencies() {
+    super.didChangeDependencies();
+    final inset = effectiveKeyboardInset(context, _keyboardInset);
+    if ((inset - _lastKeyboardInset).abs() >= 1) {
+      _lastKeyboardInset = inset;
+      _scheduleRevealFocusedField();
+    }
   }
 
   @override
   void dispose() {
+    _keyboardInset.removeListener(_onKeyboardInsetChanged);
+    _emailFocus.removeListener(_onFocusChanged);
+    _passwordFocus.removeListener(_onFocusChanged);
     _emailController.dispose();
     _passwordController.dispose();
     _emailFocus.dispose();
     _passwordFocus.dispose();
+    _scrollController.dispose();
     super.dispose();
   }
 
+  void _onKeyboardInsetChanged() {
+    if (!mounted) return;
+    setState(() {});
+    _scheduleRevealFocusedField();
+  }
+
+  void _onFocusChanged() {
+    if (_emailFocus.hasFocus || _passwordFocus.hasFocus) {
+      _scheduleRevealFocusedField();
+    }
+  }
+
+  void _scheduleRevealFocusedField() {
+    WidgetsBinding.instance.addPostFrameCallback((_) {
+      if (mounted) _revealFocusedField();
+    });
+  }
+
+  void _revealFocusedField() {
+    if (!_scrollController.hasClients) return;
+    final focus = _passwordFocus.hasFocus
+        ? _passwordFocus
+        : _emailFocus.hasFocus
+        ? _emailFocus
+        : null;
+    final fieldContext = focus?.context;
+    final renderObject = fieldContext?.findRenderObject();
+    if (renderObject is! RenderBox || !renderObject.hasSize) return;
+    final keyboardInset = effectiveKeyboardInset(context, _keyboardInset);
+    if (keyboardInset <= 0) return;
+    final fieldBottom = renderObject
+        .localToGlobal(Offset(0, renderObject.size.height))
+        .dy;
+    final visibleBottom =
+        MediaQuery.sizeOf(context).height - keyboardInset - 24;
+    final overlap = fieldBottom - visibleBottom;
+    if (overlap <= 0) return;
+    final position = _scrollController.position;
+    final target = (position.pixels + overlap)
+        .clamp(position.minScrollExtent, position.maxScrollExtent)
+        .toDouble();
+    if (target <= position.pixels + 0.5) return;
+    unawaited(
+      _scrollController.animateTo(
+        target,
+        duration: const Duration(milliseconds: 200),
+        curve: Curves.easeOutCubic,
+      ),
+    );
+  }
+
   String _errorText(AppLocalizations l10n, AuthFieldError error) {
     switch (error) {
       case AuthFieldError.emailRequired:
@@ -246,12 +320,13 @@ class _AuthPageState extends State<AuthPage> {
                       : _topContentPadding;
                   final bottom =
                       _bottomContentPadding +
-                      MediaQuery.viewInsetsOf(context).bottom;
+                      effectiveKeyboardInset(context, _keyboardInset);
                   final available = constraints.maxHeight - top - bottom;
                   final minHeight = available > 0 ? available : 0.0;
                   return AutofillGroup(
                     child: SingleChildScrollView(
                       key: const Key('auth-scroll'),
+                      controller: _scrollController,
                       keyboardDismissBehavior:
                           ScrollViewKeyboardDismissBehavior.onDrag,
                       padding: EdgeInsets.fromLTRB(