From 9efd1177b7f6a92337aa8b1ba09170e9eb538c28 Mon Sep 17 00:00:00 2001
From: wangjia <809946525@qq.com>
Date: Sat, 4 Jul 2026 20:31:33 +0800
Subject: [PATCH] =?UTF-8?q?feat(client):=20=E7=A7=BB=E5=8A=A8=E7=AB=AF?=
 =?UTF-8?q?=E6=A8=AA=E6=BB=91=E6=89=8B=E5=8A=BF=E2=80=94=E2=80=94tab=20?=
 =?UTF-8?q?=E6=A0=B9=E5=B7=A6=E5=8F=B3=E6=BB=91=E5=88=87=20tab=E3=80=81?=
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- tab 根（库存/入库/出库/财务/我的）：左滑下一个 tab、右滑上一个（不循环）
- 二级屏：左滑返回（同顶栏返回箭头语义），右滑无响应
- 仅窄屏生效；内容区横向滚动（分段 tab/表格横滚）在手势竞技场优先，不冲突

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 client/lib/screens/shell/app_shell.dart | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/client/lib/screens/shell/app_shell.dart b/client/lib/screens/shell/app_shell.dart
index 7b46c27..39ee3a1 100644
--- a/client/lib/screens/shell/app_shell.dart
+++ b/client/lib/screens/shell/app_shell.dart
@@ -224,6 +224,29 @@ class _AppShellState extends ConsumerState<AppShell> {
     // 并在顶栏出返回箭头（_buildTopBar 内）。
     final isTabRoot = _tabRoots.contains(widget.location);
 
+    // 窄屏横滑手势（2026-07-04 拍板）：tab 根左右滑切换相邻 tab（不循环）；
+    // 二级屏左滑退出（回来源/我的），右滑无响应。内容区里的横向滚动
+    //（分段 tab / 表格横滚）在手势竞技场中优先，互不冲突。
+    Widget shellContent = widget.navigationShell;
+    if (isMobile) {
+      shellContent = GestureDetector(
+        behavior: HitTestBehavior.translucent,
+        onHorizontalDragEnd: (d) {
+          final v = d.primaryVelocity ?? 0;
+          if (v.abs() < 200) return; // 轻微拖动不触发
+          if (isTabRoot) {
+            final pos = _tabForBranch(widget.navigationShell.currentIndex);
+            final next = v < 0 ? pos + 1 : pos - 1; // 左滑→下一个 tab
+            if (next < 0 || next >= _mobileTabs.length) return;
+            _goBranch(_mobileTabs[next].$3);
+          } else if (v < 0) {
+            _backFromSecondary(); // 左滑退出；右滑无响应
+          }
+        },
+        child: widget.navigationShell,
+      );
+    }
+
     final Widget shell = SelectionArea(
       child: Scaffold(
         body: Column(
@@ -238,7 +261,7 @@ class _AppShellState extends ConsumerState<AppShell> {
                       children: [
                         ..._buildBanners(context, isOnline, updateInfo,
                             updateNotifier, licenseInfo),
-                        Expanded(child: widget.navigationShell),
+                        Expanded(child: shellContent),
                         if (!isMobile) AppStatusBar(loginTime: _loginTime),
                       ],
                     ),