fix(android): 收紧「今天」首页布局并统一卡片

client/lib/ui/widgets/fx_section_header.dart

@@ -59,7 +59,10 @@ class FxSectionHeader extends StatelessWidget {
     return LayoutBuilder(
       builder: (context, constraints) {
         final scale = MediaQuery.textScalerOf(context).scale(1);
-        final narrow = constraints.maxWidth < 440 || scale >= 1.6;
+        // 优先单行呈现：普通 Android 窄屏容得下标题和短操作，不应按全局宽度强制换行。
+        // 仅在真正紧窄或超大字体时退化为右对齐的第二行。
+        final narrow = constraints.maxWidth < 300 ||
+            (scale >= 1.6 && constraints.maxWidth < 440);
         final action = trailingWidget;
         if (action == null) {
           return ConstrainedBox(

client/lib/widgets/dashboard/dashboard_body.dart

@@ -1,5 +1,3 @@
-import 'dart:math' as math;
-
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:lucide_icons_flutter/lucide_icons.dart';
@@ -294,8 +292,9 @@ class _DashboardBodyState extends State<DashboardBody> {
     final theme = Theme.of(context);
     final color = _parseColor(item['color']?.toString());
     final active = _activeDays(item);
+    final activeCount = _lastSevenDays().where((day) => active.contains(_dateKey(day))).length;
     return Container(
-      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 8),
+      padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
       decoration: BoxDecoration(
         color: color.withValues(alpha: .06),
         border: Border.all(color: color.withValues(alpha: .18)),
@@ -311,14 +310,24 @@ class _DashboardBodyState extends State<DashboardBody> {
               ).copyWith(fontWeight: FontWeight.w600),
             ),
           ),
-          if (compact)
+          if (compact) ...[
+            const SizedBox(width: 8),
+            Expanded(
+              child: FxProgress(
+                value: activeCount / 7,
+                height: 6,
+                color: color,
+                backgroundColor: color.withValues(alpha: .12),
+              ),
+            ),
+            const SizedBox(width: 8),
             Text(
-              '${active.length}/7 天',
+              '$activeCount/7 天',
               style: SlowlightTypography.caption(
                 context,
               ).copyWith(color: theme.colorScheme.onSurfaceVariant),
-            )
-          else
+            ),
+          ] else
             ..._lastSevenDays().map(
               (day) => Container(
                 width: 7,
@@ -511,7 +520,9 @@ class _DashboardBodyState extends State<DashboardBody> {
         children: [
           FxSectionHeader(
             title: '习惯',
-            trailing: '$checked/${widget.habits.length} 已打卡',
+            trailing: widget.habits.isEmpty
+                ? '暂无习惯'
+                : '$checked/${widget.habits.length} 已打卡',
             trailingWidget:
                 widget.onViewAllHabits == null
                     ? null
@@ -523,7 +534,7 @@ class _DashboardBodyState extends State<DashboardBody> {
                     ),
           ),
           if (visible.isEmpty)
-            _empty('还没有习惯记录')
+            _empty('还没有习惯记录', compact: mobile)
           else
             ...visible.map((habit) => _habitRow(habit, mobile)),
         ],
@@ -625,6 +636,7 @@ class _DashboardBodyState extends State<DashboardBody> {
 
   Widget _focusCard() {
     final theme = Theme.of(context);
+    final mobile = !ResponsiveLayout.isDesktopOrWider(context);
     final count = (_facts['focus_count'] as num?)?.toInt() ?? 0;
     final minutes = (_facts['focus_minutes'] as num?)?.toInt() ?? 0;
     return _card(
@@ -659,70 +671,59 @@ class _DashboardBodyState extends State<DashboardBody> {
               icon: LucideIcons.timer,
               variant: FxButtonVariant.outline,
               size: FxButtonSize.sm,
-              expanded: true,
               onPressed: widget.onStartFocus,
             ),
           ],
         ],
       ),
+      padding: EdgeInsets.all(mobile ? 12 : 16),
     );
   }
 
   Widget _questionCard() {
     final theme = Theme.of(context);
+    final mobile = !ResponsiveLayout.isDesktopOrWider(context);
     final visible = _insights
         .where((item) => !_ignored.contains(item.id))
         .take(1)
         .toList(growable: false);
     final insight = visible.isEmpty ? null : visible.first;
-    return FxInkWell(
-      borderRadius: BorderRadius.circular(SlowlightRadius.lg),
-      onTap: insight == null ? null : () => _respond(insight),
-      child: CustomPaint(
-        painter: _DashedBorderPainter(
-          color: fxDivider(context),
-          radius: SlowlightRadius.lg,
-        ),
-        child: Container(
-          width: double.infinity,
-          padding: const EdgeInsets.all(16),
-          decoration: BoxDecoration(
-            color: fxSurface(context),
-            borderRadius: BorderRadius.circular(SlowlightRadius.lg),
-          ),
-          child: Column(
-            crossAxisAlignment: CrossAxisAlignment.start,
-            children: [
-              FxChip(
-                label: '今日提问',
-                backgroundColor: activePalette.accent.withValues(alpha: .12),
-                foregroundColor: activePalette.accent,
-                borderRadius: 999,
-                padding: const EdgeInsets.symmetric(horizontal: 9, vertical: 3),
+    return _card(
+      FxInkWell(
+        borderRadius: BorderRadius.circular(SlowlightRadius.lg),
+        onTap: insight == null ? null : () => _respond(insight),
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            FxChip(
+              label: '今日提问',
+              backgroundColor: activePalette.accent.withValues(alpha: .12),
+              foregroundColor: activePalette.accent,
+              borderRadius: SlowlightRadius.pill,
+              padding: const EdgeInsets.symmetric(horizontal: 9, vertical: 3),
+            ),
+            const SizedBox(height: 8),
+            Text(
+              insight?.content ?? '今天暂时没有特别需要关注的变化。',
+              maxLines: 4,
+              overflow: TextOverflow.ellipsis,
+              style: SlowlightTypography.secondary(context).copyWith(
+                fontWeight: insight == null ? FontWeight.w400 : FontWeight.w600,
               ),
+            ),
+            if (insight != null) ...[
               const SizedBox(height: 8),
               Text(
-                insight?.content ?? '今天暂时没有特别需要关注的变化。',
-                maxLines: 4,
-                overflow: TextOverflow.ellipsis,
-                style: SlowlightTypography.secondary(context).copyWith(
-                  fontWeight:
-                      insight == null ? FontWeight.w400 : FontWeight.w600,
-                ),
+                '点击去回应 →',
+                style: SlowlightTypography.caption(
+                  context,
+                ).copyWith(color: theme.colorScheme.onSurfaceVariant),
               ),
-              if (insight != null) ...[
-                const SizedBox(height: 8),
-                Text(
-                  '点击去回应 →',
-                  style: SlowlightTypography.caption(
-                    context,
-                  ).copyWith(color: theme.colorScheme.onSurfaceVariant),
-                ),
-              ],
             ],
-          ),
+          ],
         ),
       ),
+      padding: EdgeInsets.all(mobile ? 12 : 16),
     );
   }
 
@@ -742,8 +743,8 @@ class _DashboardBodyState extends State<DashboardBody> {
     }
   }
 
-  Widget _empty(String text) => Padding(
-    padding: const EdgeInsets.symmetric(vertical: 14),
+  Widget _empty(String text, {bool compact = false}) => Padding(
+    padding: EdgeInsets.symmetric(vertical: compact ? 8 : 14),
     child: Text(
       text,
       style: SlowlightTypography.secondary(
@@ -952,34 +953,3 @@ class _SwipeAction extends StatelessWidget {
   }
 }
 
-class _DashedBorderPainter extends CustomPainter {
-  final Color color;
-  final double radius;
-
-  const _DashedBorderPainter({required this.color, required this.radius});
-
-  @override
-  void paint(Canvas canvas, Size size) {
-    final paint =
-        Paint()
-          ..color = color
-          ..style = PaintingStyle.stroke
-          ..strokeWidth = 1;
-    final path =
-        Path()..addRRect(
-          RRect.fromRectAndRadius(Offset.zero & size, Radius.circular(radius)),
-        );
-    for (final metric in path.computeMetrics()) {
-      var distance = 0.0;
-      while (distance < metric.length) {
-        final end = math.min(distance + 5, metric.length).toDouble();
-        canvas.drawPath(metric.extractPath(distance, end), paint);
-        distance += 9;
-      }
-    }
-  }
-
-  @override
-  bool shouldRepaint(covariant _DashedBorderPainter oldDelegate) =>
-      oldDelegate.color != color || oldDelegate.radius != radius;
-}

client/test/screens/home_screen_test.dart

@@ -36,6 +36,14 @@ void main() {
       });
     }
 
+    testWidgets('移动端保留可拖动的悬浮快速添加任务入口', (tester) async {
+      await pumpAt(tester, size: const Size(360, 800));
+      expect(fxTooltipFinder('快速记录任务（按住可拖动）'), findsOneWidget);
+      expect(fxTooltipFinder('记录任务'), findsOneWidget);
+      expect(tester.takeException(), isNull);
+      await disposeFxTestHost(tester);
+    });
+
     testWidgets('360×800 在 130% 系统字体下不产生布局异常', (tester) async {
       await pumpAt(
         tester,

client/test/ui/fx_section_header_test.dart

@@ -82,6 +82,50 @@ void main() {
     await disposeFxTestHost(tester);
   });
 
+  for (final scale in [1.0, 1.3]) {
+    testWidgets('FxSectionHeader 360dp 常规字体 $scale 时标题操作同一行', (tester) async {
+      debugDefaultTargetPlatformOverride = TargetPlatform.android;
+      addTearDown(() => debugDefaultTargetPlatformOverride = null);
+
+      await tester.pumpWidget(
+        buildFxTestHost(
+          theme: AppTheme.lightTheme(),
+          home: MediaQuery(
+            data: MediaQueryData(
+              size: const Size(360, 800),
+              textScaler: TextScaler.linear(scale),
+            ),
+            child: Scaffold(
+              body: Align(
+                alignment: Alignment.topLeft,
+                child: SizedBox(
+                  // 首页卡片在 360dp 设备上的真实内容宽度。
+                  width: 304,
+                  child: FxSectionHeader(
+                    title: '今日任务',
+                    trailing: '0/1 完成',
+                    trailingWidget: FxButton(
+                      label: '查看全部',
+                      variant: FxButtonVariant.ghost,
+                      size: FxButtonSize.sm,
+                      onPressed: () {},
+                    ),
+                  ),
+                ),
+              ),
+            ),
+          ),
+        ),
+      );
+
+      final titleRect = tester.getRect(find.text('今日任务'));
+      final actionRect = tester.getRect(find.text('查看全部'));
+      expect((titleRect.center.dy - actionRect.center.dy).abs(), lessThan(24));
+      expect(tester.takeException(), isNull);
+      await disposeFxTestHost(tester);
+    });
+  }
+
   testWidgets('FxSectionHeader 大字体时将查看全部放到下一行右侧', (tester) async {
     debugDefaultTargetPlatformOverride = TargetPlatform.android;
     addTearDown(() => debugDefaultTargetPlatformOverride = null);
@@ -95,16 +139,23 @@ void main() {
             textScaler: TextScaler.linear(2),
           ),
           child: Scaffold(
-            body: Padding(
-              padding: const EdgeInsets.all(16),
-              child: FxSectionHeader(
-                title: '今日任务',
-                trailing: '3/5 已完成',
-                trailingWidget: FxButton(
-                  label: '查看全部',
-                  variant: FxButtonVariant.ghost,
-                  size: FxButtonSize.sm,
-                  onPressed: () {},
+            body: Align(
+              alignment: Alignment.topLeft,
+              child: SizedBox(
+                // MediaQuery.size 不会约束测试视口；模拟实际 360dp 的卡片宽度。
+                width: 328,
+                child: Padding(
+                  padding: const EdgeInsets.all(16),
+                  child: FxSectionHeader(
+                    title: '今日任务',
+                    trailing: '3/5 已完成',
+                    trailingWidget: FxButton(
+                      label: '查看全部',
+                      variant: FxButtonVariant.ghost,
+                      size: FxButtonSize.sm,
+                      onPressed: () {},
+                    ),
+                  ),
                 ),
               ),
             ),