refactor(client): 日期选择统一为扁平组件——输入框+滚轮同宽居中入面板，桌面/移动全覆盖

- wheel_date_picker.dart 重构为统一组件：单日期 showDsDateDropdown（面板=
  可输入框+三列滚轮+今天/确定）、范围 showDateRangeDropdown（起始|结束双窗格
  并排+共用底栏）；桌面锚定下拉（透明遮罩不冻结窗口）、窄屏底部 sheet 同内容
  （范围纵排）——同一套窗格两端复用
- 扁平化：输入框与滚轮同宽 248、文字水平垂直居中(mono)、去掉全部阴影/立体
  效果（滚轮外框仅 1px 边框，中心高亮带去描边）
- DsDateCell（录单日期格）与 DatePickerField（登记收支）改为触发器：点选/
  回车打开统一面板，键入在面板内完成；出库工具栏时间 chip 补切到新组件
- 旧 showWheelDatePicker/showWheelDateRange 两步弹窗删除；组件测试改写为
  新契约（触发器+面板键入+词法归一），表单 golden 随形态更新

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

client/lib/screens/shared/order_form_shell.dart

@@ -760,9 +760,8 @@ class RowActions extends StatelessWidget {
       );
 }
 
-/// 内联日期格（.datefield / .gci-date）：可直接键入（「2024」「2024-5-12」
-/// 「20240512」等，失焦/回车归一为 yyyy-MM-dd，同 DatePickerField 词法），
-/// 日历图标打开滚轮面板；值等宽显示。
+/// 内联日期格（.datefield / .gci-date）：点选或 Enter 打开统一日期下拉
+/// （面板内含可输入框 + 三列滚轮，见 wheel_date_picker.dart），值等宽显示。
 class DsDateCell extends StatefulWidget {
   final String? value; // yyyy-MM-dd
   final ValueChanged<String?> onChanged;
@@ -789,198 +788,86 @@ class DsDateCell extends StatefulWidget {
 }
 
 class _DsDateCellState extends State<DsDateCell> {
-  // 浮层锚定到字段下方（对齐原型 datewheel.js：pop.style.top = field.bottom + 4），
-  // 非居中弹窗，无遮罩——点字段外任意处收起（TapRegion.onTapOutside）。
-  final _link = LayerLink();
-  OverlayEntry? _entry;
-  bool get _open => _entry != null;
+  BuildContext? _anchorCtx; // 字段自身 ctx（Builder 捕获），下拉锚定于此
 
-  late final TextEditingController _ctrl =
-      TextEditingController(text: widget.value ?? '');
-  FocusNode? _ownFocus; // 调用方没给 focusNode 时自建（自建才由本组件 dispose）
-  FocusNode get _focus => widget.focusNode ?? (_ownFocus ??= FocusNode());
-
-  @override
-  void initState() {
-    super.initState();
-    _focus.addListener(_onFocusChange);
-  }
-
-  void _onFocusChange() {
-    // 失焦归一显示（2024 → 2024-01-01）；顺带刷新激活描边
-    if (!_focus.hasFocus) {
-      final n = normalizeYmd(_ctrl.text);
-      if (n != null && n != _ctrl.text) _ctrl.text = n;
+  Future<void> _pick() async {
+    final anchor = _anchorCtx;
+    if (!widget.enabled || anchor == null) return;
+    final d = await showDsDateDropdown(anchor, initial: parseYmd(widget.value));
+    if (d != null) {
+      widget.onChanged(formatYmd(d));
+      widget.onPicked?.call();
     }
-    if (mounted) setState(() {});
-  }
-
-  @override
-  void didUpdateWidget(DsDateCell old) {
-    super.didUpdateWidget(old);
-    // 仅在无焦点（非用户正在输入）时同步外部值，避免回流打断输入
-    if (!_focus.hasFocus &&
-        old.value != widget.value &&
-        (widget.value ?? '') != _ctrl.text) {
-      _ctrl.text = widget.value ?? '';
-    }
-  }
-
-  @override
-  void dispose() {
-    _removeOverlay();
-    _focus.removeListener(_onFocusChange);
-    _ownFocus?.dispose();
-    _ctrl.dispose();
-    super.dispose();
-  }
-
-  void _toggle() {
-    if (_open) {
-      _close();
-    } else {
-      _openOverlay();
-    }
-  }
-
-  void _openOverlay() {
-    if (_open || !widget.enabled) return;
-    final init = parseYmd(widget.value) ?? DateTime.now();
-    _entry = OverlayEntry(
-      builder: (_) => Positioned(
-        width: 248,
-        child: CompositedTransformFollower(
-          link: _link,
-          showWhenUnlinked: false,
-          targetAnchor: Alignment.bottomLeft,
-          followerAnchor: Alignment.topLeft,
-          offset: const Offset(0, 4),
-          child: TapRegion(
-            onTapOutside: (_) => _close(),
-            child: WheelDatePanel(
-              initial: init,
-              onCommit: (d) {
-                final v = formatYmd(d);
-                _ctrl.text = v;
-                widget.onChanged(v);
-                _close();
-                widget.onPicked?.call();
-              },
-            ),
-          ),
-        ),
-      ),
-    );
-    Overlay.of(context).insert(_entry!);
-    setState(() {});
-  }
-
-  void _close() {
-    _removeOverlay();
-    if (mounted) setState(() {});
-  }
-
-  void _removeOverlay() {
-    _entry?.remove();
-    _entry = null;
-  }
-
-  /// 提交键入值：归一 + 回写 + 推进下一格（Enter / 失焦走这里）。
-  void _commitTyped(String v) {
-    final n = normalizeYmd(v);
-    if (n != null) _ctrl.text = n;
-    widget.onChanged(n);
-    if (_open) _close();
-    widget.onPicked?.call();
   }
 
   @override
   Widget build(BuildContext context) {
     final t = context.tokens;
+    final has = widget.value != null && widget.value!.isNotEmpty;
     final height = widget.cell ? 32.0 : 38.0;
-    final active = _focus.hasFocus || _open;
-    return CompositedTransformTarget(
-      link: _link,
-      child: Focus(
-        // Tab/Esc 仍拦在外层（键盘流推进 / 收滚轮）；Enter 交给 TextField.onSubmitted
-        onKeyEvent: (node, e) {
-          if (e is! KeyDownEvent) return KeyEventResult.ignored;
-          final k = e.logicalKey;
-          if (k == LogicalKeyboardKey.escape) {
-            if (_open) {
-              _close();
-              return KeyEventResult.handled;
-            }
-            return KeyEventResult.ignored;
-          }
-          if (k == LogicalKeyboardKey.tab) {
-            final back = HardwareKeyboard.instance.isShiftPressed;
-            if (_open) _close();
-            final handled = widget.onTab?.call(backward: back) ?? false;
-            return handled ? KeyEventResult.handled : KeyEventResult.ignored;
-          }
-          return KeyEventResult.ignored;
-        },
-        child: Container(
-          height: height,
-          padding: const EdgeInsets.only(left: 10, right: 6),
-          decoration: BoxDecoration(
-            color: widget.cell
-                ? (active ? t.surface : Colors.transparent)
-                : t.surface,
-            border: Border.all(
-              color: widget.hasError
-                  ? t.danger
-                  : (active
-                      ? t.primary
-                      : (widget.cell ? Colors.transparent : t.border)),
+    return Focus(
+      focusNode: widget.focusNode,
+      onKeyEvent: (node, e) {
+        if (e is! KeyDownEvent) return KeyEventResult.ignored;
+        final k = e.logicalKey;
+        if (k == LogicalKeyboardKey.enter ||
+            k == LogicalKeyboardKey.numpadEnter ||
+            k == LogicalKeyboardKey.space) {
+          _pick();
+          return KeyEventResult.handled;
+        }
+        if (k == LogicalKeyboardKey.tab) {
+          final back = HardwareKeyboard.instance.isShiftPressed;
+          final handled = widget.onTab?.call(backward: back) ?? false;
+          return handled ? KeyEventResult.handled : KeyEventResult.ignored;
+        }
+        return KeyEventResult.ignored;
+      },
+      child: Builder(builder: (context) {
+        _anchorCtx = context;
+        final active = Focus.of(context).hasFocus;
+        return GestureDetector(
+          behavior: HitTestBehavior.opaque,
+          onTap: widget.enabled
+              ? () {
+                  widget.focusNode?.requestFocus();
+                  _pick();
+                }
+              : null,
+          child: Container(
+            height: height,
+            padding: const EdgeInsets.symmetric(horizontal: 10),
+            decoration: BoxDecoration(
+              color: widget.cell
+                  ? (active ? t.surface : Colors.transparent)
+                  : t.surface,
+              border: Border.all(
+                color: widget.hasError
+                    ? t.danger
+                    : (active
+                        ? t.primary
+                        : (widget.cell ? Colors.transparent : t.border)),
+              ),
+              borderRadius:
+                  BorderRadius.circular(widget.cell ? 5 : AppDims.rMd),
             ),
-            borderRadius: BorderRadius.circular(widget.cell ? 5 : AppDims.rMd),
-          ),
-          child: Row(children: [
-            Expanded(
-              child: TextField(
-                controller: _ctrl,
-                focusNode: _focus,
-                enabled: widget.enabled,
-                keyboardType: TextInputType.datetime,
-                style: TextStyle(
-                    fontSize: AppDims.fsBody,
-                    color: t.text,
-                    fontFamily: AppFonts.mono,
-                    fontFamilyFallback: AppFonts.monoFallback),
-                decoration: InputDecoration(
-                  isCollapsed: true,
-                  isDense: true,
-                  border: InputBorder.none,
-                  enabledBorder: InputBorder.none,
-                  focusedBorder: InputBorder.none,
-                  disabledBorder: InputBorder.none,
-                  filled: false,
-                  hintText: '年-月-日',
-                  hintStyle:
-                      TextStyle(fontSize: AppDims.fsBody, color: t.faint),
+            child: Row(children: [
+              Expanded(
+                child: Text(
+                  has ? widget.value! : '选择日期',
+                  overflow: TextOverflow.ellipsis,
+                  style: TextStyle(
+                      fontSize: AppDims.fsBody,
+                      color: has ? t.text : t.faint,
+                      fontFamily: has ? AppFonts.mono : null,
+                      fontFamilyFallback: has ? AppFonts.monoFallback : null),
                 ),
-                onChanged: (v) => widget.onChanged(normalizeYmd(v)),
-                onSubmitted: _commitTyped,
               ),
-            ),
-            InkWell(
-              onTap: widget.enabled
-                  ? () {
-                      _focus.requestFocus();
-                      _toggle();
-                    }
-                  : null,
-              borderRadius: BorderRadius.circular(AppDims.rSm),
-              child: Padding(
-                padding: const EdgeInsets.all(4),
-                child: Icon(LucideIcons.calendar, size: 15, color: t.faint),
-              ),
-            ),
-          ]),
-        ),
-      ),
+              Icon(LucideIcons.calendar, size: 15, color: t.faint),
+            ]),
+          ),
+        );
+      }),
     );
   }
 }

client/lib/screens/stock_out/stock_out_list_screen.dart

@@ -228,8 +228,8 @@ class _StockOutListScreenState extends ConsumerState<StockOutListScreen> {
     n.setDetail(const {});
   }
 
-  Future<void> _pickDateRange() async {
-    final range = await showWheelDateRange(context, initial: _dateRange);
+  Future<void> _pickDateRange(BuildContext anchor) async {
+    final range = await showDateRangeDropdown(anchor, initial: _dateRange);
     if (range == null) return;
     setState(() {
       _dateRange = range;
@@ -240,9 +240,9 @@ class _StockOutListScreenState extends ConsumerState<StockOutListScreen> {
   }
 
   /// 出库时间预设（对齐原型：全部时间/近7天/近30天/本月/自定义）。
-  void _setDatePreset(String label) {
+  void _setDatePreset(BuildContext anchor, String label) {
     if (label == '自定义…') {
-      _pickDateRange();
+      _pickDateRange(anchor);
       return;
     }
     final now = DateTime.now();
@@ -871,12 +871,15 @@ class _StockOutListScreenState extends ConsumerState<StockOutListScreen> {
       },
     );
 
-    final dateChip = _MenuChip(
-      label: '出库时间',
-      value: _datePresetLabel.isEmpty ? null : _datePresetLabel,
-      options: const ['全部时间', '近 7 天', '近 30 天', '本月', '自定义…'],
-      onSelected: _setDatePreset,
-      onClear: () => _setDatePreset('全部时间'),
+    // anchorCtx = chip 自身位置：自定义范围下拉锚定在 chip 下方
+    final dateChip = Builder(
+      builder: (anchorCtx) => _MenuChip(
+        label: '出库时间',
+        value: _datePresetLabel.isEmpty ? null : _datePresetLabel,
+        options: const ['全部时间', '近 7 天', '近 30 天', '本月', '自定义…'],
+        onSelected: (v) => _setDatePreset(anchorCtx, v),
+        onClear: () => _setDatePreset(anchorCtx, '全部时间'),
+      ),
     );
 
     final advBtn = DsButton(

client/lib/widgets/date_picker_field.dart

@@ -1,14 +1,14 @@
 import 'package:lucide_icons_flutter/lucide_icons.dart';
 import 'package:flutter/material.dart';
+import '../core/theme/app_dims.g.dart';
+import '../core/theme/app_fonts.dart';
 import '../core/theme/context_tokens.dart';
 import '../core/utils/date_util.dart';
+import 'wheel_date_picker.dart';
 
-/// 可键入日期框 + 日历图标（替代旧的「年/月/日」三下拉）。
-///
-/// - **直接键入**：支持「2024」「2024-5」「2024-5-12」「20240512」等，归一为 `yyyy-MM-dd`，
-///   缺的月/日补 `01`（老酒只知道年份，填 2024 即 2024-01-01）。失焦时把显示归一化。
-/// - **日历图标**：弹 Material `showDatePicker`（input 模式可直接键入年份，选老年份方便）。
-/// - 值以 `yyyy-MM-dd` 字符串进出（[value] / [onChanged]）；无有效年时回调 null。
+/// 日期字段（登记收支等表单用）：点选打开统一日期下拉（面板内含可输入框 +
+/// 三列滚轮，见 wheel_date_picker.dart，桌面锚定下拉 / 窄屏底部 sheet）。
+/// 值以 `yyyy-MM-dd` 字符串进出（[value] / [onChanged]）。
 class DatePickerField extends StatefulWidget {
   final String? value; // yyyy-MM-dd
   final ValueChanged<String?> onChanged;
@@ -28,55 +28,12 @@ class DatePickerField extends StatefulWidget {
 }
 
 class _DatePickerFieldState extends State<DatePickerField> {
-  late final TextEditingController _ctrl;
-  final FocusNode _focus = FocusNode();
-
-  @override
-  void initState() {
-    super.initState();
-    _ctrl = TextEditingController(text: widget.value ?? '');
-    _focus.addListener(() {
-      // 失焦时把输入归一化显示（如 2024 → 2024-01-01）
-      if (!_focus.hasFocus) {
-        final n = normalizeYmd(_ctrl.text);
-        if (n != null && n != _ctrl.text) {
-          _ctrl.text = n;
-        }
-      }
-    });
-  }
-
-  @override
-  void didUpdateWidget(DatePickerField old) {
-    super.didUpdateWidget(old);
-    // 仅在无焦点（非用户正在输入）时同步外部值，避免回流打断输入
-    if (!_focus.hasFocus &&
-        old.value != widget.value &&
-        (widget.value ?? '') != _ctrl.text) {
-      _ctrl.text = widget.value ?? '';
-    }
-  }
-
-  @override
-  void dispose() {
-    _ctrl.dispose();
-    _focus.dispose();
-    super.dispose();
-  }
-
-  Future<void> _pickFromCalendar(FormFieldState<String> field) async {
-    final init =
-        parseYmd(normalizeYmd(_ctrl.text) ?? widget.value) ?? DateTime.now();
-    final picked = await showDatePicker(
-      context: context,
-      initialDate: init,
-      firstDate: DateTime(1900),
-      lastDate: DateTime(2200),
-      initialEntryMode: DatePickerEntryMode.input,
-    );
-    if (picked != null) {
-      final v = formatYmd(picked);
-      _ctrl.text = v;
+  Future<void> _pick(
+      BuildContext anchorCtx, FormFieldState<String> field) async {
+    final d =
+        await showDsDateDropdown(anchorCtx, initial: parseYmd(widget.value));
+    if (d != null) {
+      final v = formatYmd(d);
       field.didChange(v);
       widget.onChanged(v);
     }
@@ -84,38 +41,57 @@ class _DatePickerFieldState extends State<DatePickerField> {
 
   @override
   Widget build(BuildContext context) {
+    final t = context.tokens;
     return FormField<String>(
       initialValue: widget.value,
       validator: widget.isRequired
-          ? (_) => normalizeYmd(_ctrl.text) == null ? '请输入日期' : null
+          ? (_) =>
+              (widget.value == null || widget.value!.isEmpty) ? '请输入日期' : null
           : null,
       builder: (field) {
-        return TextField(
-          controller: _ctrl,
-          focusNode: _focus,
-          keyboardType: TextInputType.datetime,
-          style: const TextStyle(fontSize: 13),
-          decoration: InputDecoration(
-            isDense: true,
-            hintText: '年-月-日',
-            hintStyle: const TextStyle(fontSize: 12),
-            contentPadding:
-                const EdgeInsets.symmetric(horizontal: 8, vertical: 8),
-            errorText: field.errorText,
-            suffixIcon: IconButton(
-              icon: Icon(LucideIcons.calendar,
-                  size: 16, color: context.tokens.muted),
-              padding: EdgeInsets.zero,
-              constraints: const BoxConstraints(minWidth: 34, minHeight: 34),
-              tooltip: '选择日期',
-              onPressed: () => _pickFromCalendar(field),
+        final has = widget.value != null && widget.value!.isNotEmpty;
+        return Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            Builder(
+              builder: (anchorCtx) => InkWell(
+                onTap: () => _pick(anchorCtx, field),
+                borderRadius: BorderRadius.circular(AppDims.rMd),
+                child: Container(
+                  height: 38,
+                  padding: const EdgeInsets.symmetric(horizontal: 10),
+                  decoration: BoxDecoration(
+                    color: t.surface,
+                    border:
+                        Border.all(color: field.hasError ? t.danger : t.border),
+                    borderRadius: BorderRadius.circular(AppDims.rMd),
+                  ),
+                  child: Row(children: [
+                    Expanded(
+                      child: Text(
+                        has ? widget.value! : '年-月-日',
+                        overflow: TextOverflow.ellipsis,
+                        style: TextStyle(
+                            fontSize: AppDims.fsBody,
+                            color: has ? t.text : t.faint,
+                            fontFamily: has ? AppFonts.mono : null,
+                            fontFamilyFallback:
+                                has ? AppFonts.monoFallback : null),
+                      ),
+                    ),
+                    Icon(LucideIcons.calendar, size: 16, color: t.muted),
+                  ]),
+                ),
+              ),
             ),
-          ),
-          onChanged: (v) {
-            final n = normalizeYmd(v);
-            field.didChange(n);
-            widget.onChanged(n);
-          },
+            if (field.errorText != null)
+              Padding(
+                padding: const EdgeInsets.only(top: 4, left: 2),
+                child: Text(field.errorText!,
+                    style: TextStyle(fontSize: AppDims.fsXs, color: t.danger)),
+              ),
+          ],
         );
       },
     );

client/test/date_picker_field_test.dart

@@ -33,19 +33,7 @@ void main() {
   });
 
   group('DatePickerField', () {
-    testWidgets('渲染可键入框 + 日历图标', (tester) async {
-      await tester.pumpWidget(MaterialApp(
-        theme: buildTheme('a'),
-        home: Scaffold(
-          body: DatePickerField(value: '2026-06-19', onChanged: (_) {}),
-        ),
-      ));
-      await tester.pumpAndSettle();
-      expect(find.byType(TextField), findsOneWidget);
-      expect(find.byIcon(LucideIcons.calendar), findsOneWidget);
-    });
-
-    testWidgets('初始值回显到输入框', (tester) async {
+    testWidgets('渲染触发字段：值回显 + 日历图标', (tester) async {
       await tester.pumpWidget(MaterialApp(
         theme: buildTheme('a'),
         home: Scaffold(
@@ -54,30 +42,56 @@ void main() {
       ));
       await tester.pumpAndSettle();
       expect(find.text('2026-06-19'), findsOneWidget);
+      expect(find.byIcon(LucideIcons.calendar), findsOneWidget);
+      // 字段本体不再内嵌输入框（输入框在下拉面板里）
+      expect(find.byType(TextField), findsNothing);
     });
 
-    testWidgets('只输年份归一为 yyyy-01-01', (tester) async {
+    testWidgets('点选打开统一下拉：面板含输入框 + 滚轮，确定回传', (tester) async {
       String? out;
       await tester.pumpWidget(MaterialApp(
         theme: buildTheme('a'),
         home: Scaffold(
-          body: DatePickerField(onChanged: (v) => out = v),
+          body: DatePickerField(value: '2026-06-19', onChanged: (v) => out = v),
         ),
       ));
-      await tester.enterText(find.byType(TextField), '2024');
-      expect(out, '2024-01-01');
+      await tester.pumpAndSettle();
+      await tester.tap(find.byIcon(LucideIcons.calendar));
+      await tester.pumpAndSettle();
+      // 面板：可输入框 + 三列滚轮 + 今天/确定
+      expect(find.byType(TextField), findsOneWidget);
+      expect(find.byType(ListWheelScrollView), findsNWidgets(3));
+      expect(find.text('今天'), findsOneWidget);
+      await tester.tap(find.text('确定'));
+      await tester.pumpAndSettle();
+      expect(out, '2026-06-19');
     });
 
-    testWidgets('年月归一为 yyyy-MM-01', (tester) async {
+    testWidgets('面板内键入日期：归一并经确定回传', (tester) async {
       String? out;
       await tester.pumpWidget(MaterialApp(
         theme: buildTheme('a'),
         home: Scaffold(
-          body: DatePickerField(onChanged: (v) => out = v),
+          body: DatePickerField(value: '2026-06-19', onChanged: (v) => out = v),
         ),
       ));
-      await tester.enterText(find.byType(TextField), '2024-5');
-      expect(out, '2024-05-01');
+      await tester.pumpAndSettle();
+      await tester.tap(find.byIcon(LucideIcons.calendar));
+      await tester.pumpAndSettle();
+      await tester.enterText(find.byType(TextField), '20240512');
+      await tester.pumpAndSettle();
+      await tester.tap(find.text('确定'));
+      await tester.pumpAndSettle();
+      expect(out, '2024-05-12');
+    });
+
+    testWidgets('normalizeYmd 词法：年/年月补 01', (tester) async {
+      expect(normalizeYmd('2024'), '2024-01-01');
+      expect(normalizeYmd('2024-5'), '2024-05-01');
+      expect(normalizeYmd('2024/05/12'), '2024-05-12');
+      expect(normalizeYmd('20240229'), '2024-02-29'); // 闰年
+      expect(normalizeYmd('20260231'), '2026-02-28'); // 超界 clamp
+      expect(normalizeYmd('abc'), isNull);
     });
   });
 }