fix(client): 标签字体细化：阈值 128，店名细体

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,82 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.51] - 2026-06-15
+
+### 改进
+- 标签打印字体细化：阈值调回 128，店名改细体，商品名保持粗体
+
+## [1.0.50] - 2026-06-15
+
+### 改进
+- 标签打印字体更清晰：采用 2× 超采样渲染，消除热敏打印时反锯齿导致的模糊笔划
+
+## [1.0.49] - 2026-06-15
+
+### 改进
+- 二维码链接统一使用 `/app/product/` 路径，扫码后 URL 不再跳变，分享与打开同一个链接
+
+## [1.0.48] - 2026-06-15
+
+### 修复
+- 修复分享 `/app/product/` 路径时微信爬虫拿不到 OG 标签的问题（nginx 补充该路径的代理规则）
+- 分享卡片描述规格/系列与门店名分两行显示
+
+## [1.0.47] - 2026-06-15
+
+### 修复
+- 微信分享卡片描述补充度数/系列信息，不再只显示规格
+
+## [1.0.46] - 2026-06-15
+
+### 修复
+- 微信内打开商品页时顶部标题栏显示商品名称，不再显示"岩美"
+
+## [1.0.45] - 2026-06-15
+
+### 修复
+- 修复微信分享卡片标题仍显示"岩美"的问题（HTML 缩进导致字符串匹配失败）
+- 微信分享卡片描述去掉"扫码验真"后缀
+
+## [1.0.44] - 2026-06-15
+
+### 改进
+- 微信分享卡片标题改为商品名称（之前仍显示"岩美"）
+- 微信分享卡片描述去掉"扫码验真"后缀
+
+## [1.0.43] - 2026-06-15
+
+### 修复
+- 修复微信/飞书分享商品链接时卡片只显示"岩美"而不显示商品名称和图片的问题
+
+## [1.0.42] - 2026-06-15
+
+### 修复
+- 修复商品二维码扫码页报"index.html not found"的错误
+
+## [1.0.41] - 2026-06-15
+
+### 改进
+- 标签打印布局优化：编号字体与度数/日期统一大小，内容整体下移并填满标签底部，店名适当放大
+- 标签度数与规格之间加宽间距，两个字段更易区分
+
+## [1.0.40] - 2026-06-15
+
+### 新功能
+- 商品标签打印新增编号行（显示「编号：xxxx」），位于度数上方，方便核对入库单
+- 扫码分享商品链接时，微信/企业微信/飞书/钉钉等平台的分享卡片现可显示商品名、规格描述及商品图片，不再只显示「岩美」
+
+### 改进
+- 库存页表格支持横向滚动，列过多时不再截断；支持显示/隐藏列，按需定制显示内容
+
+## [1.0.39] - 2026-06-15
+
+### 修复
+- 打印预览弹窗：打印完成后自动关闭
+- 打印预览弹窗：打印机列表改为仅显示热敏打印机，无热敏打印机时显示"无打印机可用"并禁用打印按钮
+- 库存列表表格行"打标签"按钮点击无反应
+- Windows/macOS 单实例限制：同一台电脑不允许重复打开多个客户端窗口
+
 ## [1.0.38] - 2026-06-15
 
 ### 新功能

backend/config/config.go

@@ -43,6 +43,7 @@ type StorageConfig struct {
 	UploadDir string `mapstructure:"upload_dir"`
 	BaseURL   string `mapstructure:"base_url"`
 	PublicURL string `mapstructure:"public_url"` // 商品公开页基础 URL，用于生成二维码
+	WebDir    string `mapstructure:"web_dir"`    // Flutter web 构建产物目录，用于 OG 标签注入
 }
 
 var C Config
@@ -66,6 +67,7 @@ func Load() {
 	_ = viper.BindEnv("storage.upload_dir", "STORAGE_UPLOAD_DIR")
 	_ = viper.BindEnv("storage.base_url", "STORAGE_BASE_URL")
 	_ = viper.BindEnv("storage.public_url", "STORAGE_PUBLIC_URL")
+	_ = viper.BindEnv("storage.web_dir", "STORAGE_WEB_DIR")
 
 	// 默认值
 	viper.SetDefault("server.port", "8080")
@@ -78,6 +80,7 @@ func Load() {
 	viper.SetDefault("storage.upload_dir", "./uploads/images")
 	viper.SetDefault("storage.base_url", "http://localhost:8080/images")
 	viper.SetDefault("storage.public_url", "http://localhost:8081")
+	viper.SetDefault("storage.web_dir", "./web")
 
 	if err := viper.ReadInConfig(); err != nil {
 		log.Println("[config] no config file found, using defaults and env vars")

backend/internal/handler/product.go

@@ -198,7 +198,7 @@ func (h *ProductHandler) QRCode(c *gin.Context) {
 		h.db.Model(&product).Update("public_id", product.PublicID)
 	}
 
-	url := config.C.Storage.PublicURL + "/product/" + product.PublicID
+	url := config.C.Storage.PublicURL + "/app/product/" + product.PublicID
 	if product.Code != "" {
 		url += "?code=" + product.Code
 	}

backend/internal/handler/public.go

@@ -3,13 +3,17 @@ package handler
 import (
 	"errors"
 	"fmt"
+	"html"
 	"net/http"
+	"os"
+	"regexp"
 	"strconv"
 	"strings"
 
 	"github.com/gin-gonic/gin"
 	"gorm.io/gorm"
 
+	"github.com/wangjia/jiu/backend/config"
 	"github.com/wangjia/jiu/backend/internal/model"
 )
 
@@ -274,3 +278,110 @@ func (h *PublicHandler) ListShopProducts(c *gin.Context) {
 		"page_size": pageSize,
 	})
 }
+
+// ProductPage GET /product/:public_id
+// 返回注入了基础 Open Graph 标签的 Flutter index.html，供微信/飞书等社交平台爬虫生成分享卡片。
+// 找不到商品时原样返回 index.html，让 Flutter 自行展示"商品不存在"；爬虫拿不到 OG 标签但页面不报错。
+func (h *PublicHandler) ProductPage(c *gin.Context) {
+	publicID := c.Param("public_id")
+
+	// 读取 Flutter 构建产物 index.html
+	idxPath := config.C.Storage.WebDir + "/index.html"
+	idxBytes, err := os.ReadFile(idxPath)
+	if err != nil {
+		c.String(http.StatusInternalServerError, "index.html not found: %s", idxPath)
+		return
+	}
+	idxHTML := string(idxBytes)
+
+	// 查商品（只取 OG 所需字段，轻量查询）
+	var product model.Product
+	if err := h.db.Select("id, public_id, name, brand, series, spec, shop_id").
+		Where("public_id = ? AND deleted_at IS NULL", publicID).
+		Preload("Images").
+		First(&product).Error; err != nil {
+		// 查不到商品：原样返回 index.html，让 Flutter 展示"商品不存在"
+		c.Data(http.StatusOK, "text/html; charset=utf-8", idxBytes)
+		return
+	}
+
+	// 查门店名
+	var shop model.Shop
+	shopName := ""
+	if err := h.db.Select("name").Where("id = ?", product.ShopID).First(&shop).Error; err == nil {
+		shopName = shop.Name
+	}
+
+	// 构造 OG 标签并注入 </head> 前
+	ogTags := buildProductOG(product, shopName, config.C.Storage.PublicURL)
+	ogTitle := buildOGTitle(product)
+	// 同时替换 <title> 标签，微信/飞书等平台有时优先读 <title> 而非 og:title
+	// 用正则替换避免缩进空格导致字符串不匹配
+	titleRe := regexp.MustCompile(`<title>[^<]*</title>`)
+	out := titleRe.ReplaceAllString(idxHTML, "<title>"+html.EscapeString(ogTitle)+"</title>")
+	out = strings.Replace(out, "</head>", ogTags+"</head>", 1)
+	// 禁止缓存，确保爬虫每次都能拿到最新 OG 标签
+	c.Header("Cache-Control", "no-store")
+	c.Data(http.StatusOK, "text/html; charset=utf-8", []byte(out))
+}
+
+// buildOGTitle 生成商品的分享标题：品牌 + 商品名（品牌已含在名字中时不重复）+ 系列。
+func buildOGTitle(product model.Product) string {
+	title := product.Name
+	if product.Brand != "" && !strings.Contains(product.Name, product.Brand) {
+		title = product.Brand + title
+	}
+	if product.Series != "" {
+		title = title + "（" + product.Series + "）"
+	}
+	return title
+}
+
+// buildProductOG 构造基础 Open Graph meta 标签字符串。
+// 所有值经 html.EscapeString 转义，防止 XSS 或破坏 HTML 结构。
+// 无图片时不输出 og:image 行。
+func buildProductOG(product model.Product, shopName, publicURL string) string {
+	title := buildOGTitle(product)
+
+	// og:description：系列（度数/香型）· 规格（容量/单位）| 门店名正品
+	var specParts []string
+	if product.Series != "" {
+		specParts = append(specParts, product.Series)
+	}
+	if product.Spec != "" {
+		specParts = append(specParts, product.Spec)
+	}
+	desc := strings.Join(specParts, " · ")
+	suffix := "正品"
+	if shopName != "" {
+		suffix = shopName + suffix
+	}
+	if desc != "" {
+		desc = desc + "\n" + suffix
+	} else {
+		desc = suffix
+	}
+
+	// og:site_name
+	siteName := "岩美酒库"
+	if shopName != "" {
+		siteName = shopName + " · " + siteName
+	}
+
+	// og:url
+	pageURL := publicURL + "/app/product/" + product.PublicID
+
+	var sb strings.Builder
+	sb.WriteString("\n")
+	sb.WriteString(`  <meta property="og:type" content="website">` + "\n")
+	sb.WriteString(`  <meta property="og:site_name" content="` + html.EscapeString(siteName) + `">` + "\n")
+	sb.WriteString(`  <meta property="og:url" content="` + html.EscapeString(pageURL) + `">` + "\n")
+	sb.WriteString(`  <meta property="og:title" content="` + html.EscapeString(title) + `">` + "\n")
+	sb.WriteString(`  <meta property="og:description" content="` + html.EscapeString(desc) + `">` + "\n")
+	// og:image：仅有图片时输出
+	if len(product.Images) > 0 && product.Images[0].URL != "" {
+		imgURL := publicURL + product.Images[0].URL
+		sb.WriteString(`  <meta property="og:image" content="` + html.EscapeString(imgURL) + `">` + "\n")
+	}
+	return sb.String()
+}

backend/internal/router/router.go

@@ -45,6 +45,9 @@ func Setup(r *gin.Engine, db *gorm.DB) {
 	// 版本信息（无需认证，用于客户端更新检查）
 	r.GET("/version", handler.GetVersion)
 
+	// 公开商品详情页（注入 OG 标签的 Flutter index.html，供社交分享爬虫读取）
+	r.GET("/product/:public_id", publicH.ProductPage)
+
 	v1 := r.Group("/api/v1")
 
 	// 公开路由（无需登录）

client/lib/core/platform/single_instance.dart

@@ -1,11 +1,13 @@
 import 'dart:io';
 
 import 'package:flutter/foundation.dart';
-import 'package:path_provider/path_provider.dart';
 
-// Keep the RAF open so the OS lock stays alive for the lifetime of the process.
-// ignore: unused_element
-RandomAccessFile? _raf;
+// Keep the server socket alive for the lifetime of the process.
+// The OS releases the port automatically when the process exits.
+ServerSocket? _server;
+
+// Port unique to this app; chosen from the private range 49152–65535.
+const _kLockPort = 54317;
 
 /// Returns true if this process successfully acquired the single-instance lock.
 /// Returns false if another instance is already running.
@@ -15,11 +17,11 @@ Future<bool> acquire() async {
   if (!Platform.isWindows && !Platform.isMacOS) return true;
 
   try {
-    final dir = await getApplicationSupportDirectory();
-    final lockFile = File('${dir.path}/jiu.lock');
-    final raf = await lockFile.open(mode: FileMode.write);
-    await raf.lock(FileLock.exclusive);
-    _raf = raf;
+    _server = await ServerSocket.bind(
+      InternetAddress.loopbackIPv4,
+      _kLockPort,
+      shared: false,
+    );
     return true;
   } catch (_) {
     return false;

client/lib/core/utils/print_util_stub.dart

@@ -189,19 +189,24 @@ double _fitFont(String s, double maxW, double maxH, bool bold, double cap) {
   return size;
 }
 
-/// 用 dart:ui 把一张标签绘制成 320×160 位图（热敏标签实际尺寸 40×20mm @203dpi）。
+/// 用 dart:ui 把一张标签绘制成位图（热敏标签实际尺寸 40×20mm @203dpi）。
+/// 内部以 2× 超采样（640×320）绘制，转 TSPL 时再降采样，消除反锯齿模糊。
 /// 供 TSPL 裸发和预览渲染共用同一套画布逻辑，确保预览即实际输出。
 Future<ui.Image> _renderLabelBitmap({
   required String shop,
   required String name,
+  required String code,
   required String degSpec,
   required String date,
   required Uint8List qrBytes,
 }) async {
-  const w = 320, h = 160; // 40×20mm @203dpi
+  const w = 320, h = 160; // 40×20mm @203dpi（逻辑尺寸）
+  const scale = 2;         // 2× 超采样，内部以 640×320 绘制
+  const sw = w * scale, sh = h * scale;
   final recorder = ui.PictureRecorder();
   final canvas = ui.Canvas(
-      recorder, ui.Rect.fromLTWH(0, 0, w.toDouble(), h.toDouble()));
+      recorder, ui.Rect.fromLTWH(0, 0, sw.toDouble(), sh.toDouble()));
+  canvas.scale(scale.toDouble(), scale.toDouble()); // 坐标系放大，后续坐标不变
   canvas.drawRect(ui.Rect.fromLTWH(0, 0, w.toDouble(), h.toDouble()),
       ui.Paint()..color = const ui.Color(0xFFFFFFFF));
 
@@ -223,27 +228,41 @@ Future<ui.Image> _renderLabelBitmap({
   // 扫码溯源：居中于二维码正下方
   _drawText(canvas, '扫码溯源', qrLeft, qrTop + qrS + 2, 14, qrS, center: true);
 
-  // 左侧文字（无字段名标签）：按行等比分配高度铺满，字号自适应填充
+  // 左侧文字：固定字号 + 自适应行间距（与二维码上下对齐，行距均匀分配剩余空间）
   const lx = 22.0;
   const textMaxW = qrLeft - lx - 6; // 164
+
+  // 字号固定：只有商品名按宽度自适应，其余行均固定，杜绝自动放大
+  const double kShopSize  = 17.0; // 酒行名，粗体
+  const double kSmallSize = 13.0; // 编号 / 度数 / 日期，统一小字
+  // 商品名：仅按宽度适配，上限 26px，下限 14px
+  final double nameSize = _fitFont(name, textMaxW, 1000, true, 26.0).clamp(14.0, 26.0);
+
+  final codeText = code.isNotEmpty ? '编号：$code' : '';
   final rows = <(String, double, bool)>[
-    (shop, 0.9, true),
-    (name, 1.5, true),
-    if (degSpec.isNotEmpty) (degSpec, 1.05, false),
-    if (date.isNotEmpty) (date, 1.0, false),
+    if (shop.isNotEmpty)     (shop,    kShopSize,  false), // 店名细体，突出商品名
+    if (name.isNotEmpty)     (name,    nameSize,   true),  // 商品名粗体
+    if (codeText.isNotEmpty) (codeText, kSmallSize, false),
+    if (degSpec.isNotEmpty)  (degSpec,  kSmallSize, false),
+    if (date.isNotEmpty)     (date,     kSmallSize, false),
   ];
-  const topY = 4.0, botY = 156.0;
-  final totalWeight = rows.fold<double>(0, (a, r) => a + r.$2);
-  double yy = topY;
+
+  // 文字区域：整体略低于二维码顶部，底部延伸至扫码溯源文字下方
+  const double kTextTop = 16.0; // 比二维码顶部(8)低一些，整体下移
+  const double kTextBot = 150.0; // 延伸至底部，减少留白
+  const double kLineH   = 1.35;         // 行高倍数（字号 × 行高 = 该行占用高度）
+  final double totalTextH = rows.fold(0.0, (s, r) => s + r.$2 * kLineH);
+  final int n = rows.length;
+  final double rawGap = n > 0 ? (kTextBot - kTextTop - totalTextH) / (n + 1) : 4.0;
+  final double gap = rawGap < 1.5 ? 1.5 : rawGap;
+
+  double yy = kTextTop + gap;
   for (final r in rows) {
-    final rowH = (botY - topY) * r.$2 / totalWeight;
-    final fs = _fitFont(r.$1, textMaxW, rowH * 0.84, r.$3, 30);
-    final ty = yy + (rowH - fs * 1.25) / 2;
-    _drawText(canvas, r.$1, lx, ty < yy ? yy : ty, fs, textMaxW, bold: r.$3);
-    yy += rowH;
+    _drawText(canvas, r.$1, lx, yy, r.$2, textMaxW, bold: r.$3);
+    yy += r.$2 * kLineH + gap;
   }
 
-  return recorder.endRecording().toImage(w, h);
+  return recorder.endRecording().toImage(sw, sh); // 返回 2× 图（640×320）
 }
 
 /// 桌面端把「扁平标签」直接画成单色位图，TSPL BITMAP 裸发到热敏机。
@@ -253,6 +272,7 @@ Future<ui.Image> _renderLabelBitmap({
 Future<bool> _printFlatLabelThermal({
   required String shop,
   required String name,
+  required String code,
   required String degSpec,
   required String date,
   required Uint8List qrBytes,
@@ -263,11 +283,13 @@ Future<bool> _printFlatLabelThermal({
   debugPrint('[label] thermal printer = $printer');
   if (printer == null) return false;
 
+  // img 是 2× 超采样图（640×320）；TSPL 输出仍是 320×160
   const w = 320, h = 160;
   final img = await _renderLabelBitmap(
-      shop: shop, name: name, degSpec: degSpec, date: date, qrBytes: qrBytes);
+      shop: shop, name: name, code: code, degSpec: degSpec, date: date, qrBytes: qrBytes);
   final bd = await img.toByteData(format: ui.ImageByteFormat.rawRgba);
   final rgba = bd!.buffer.asUint8List();
+  final sw = img.width; // 640（2×宽）
 
   // 打包 TSPL（SIZE 用整数，避免固件不认小数导致多走纸）
   const wbytes = (w + 7) >> 3;
@@ -278,12 +300,18 @@ Future<bool> _printFlatLabelThermal({
   for (int yy = 0; yy < h; yy++) {
     final row = Uint8List(wbytes)..fillRange(0, wbytes, 0xFF); // 默认白 bit=1
     for (int xx = 0; xx < w; xx++) {
-      final i = (yy * w + xx) * 4;
-      final a = rgba[i + 3];
-      final lum = a < 128
-          ? 255.0
-          : 0.299 * rgba[i] + 0.587 * rgba[i + 1] + 0.114 * rgba[i + 2];
-      if (lum < 128) row[xx >> 3] &= ~(0x80 >> (xx & 7)); // 黑点 -> bit0
+      // 2×2 四像素平均后阈值，消除反锯齿模糊（阈值 160 = 偏灰的边缘算黑）
+      double lum = 0;
+      for (int dy = 0; dy < 2; dy++) {
+        for (int dx = 0; dx < 2; dx++) {
+          final i = ((yy * 2 + dy) * sw + (xx * 2 + dx)) * 4;
+          final a = rgba[i + 3];
+          lum += a < 128
+              ? 255.0
+              : 0.299 * rgba[i] + 0.587 * rgba[i + 1] + 0.114 * rgba[i + 2];
+        }
+      }
+      if (lum / 4 < 128) row[xx >> 3] &= ~(0x80 >> (xx & 7)); // 黑点 -> bit0
     }
     out.add(row);
   }
@@ -323,7 +351,7 @@ Future<void> printProductLabelImpl({
   final specVal   = (spec ?? '').isNotEmpty ? spec! : '';
   final seriesVal = (series ?? '').isNotEmpty ? series! : '';
   // 度数(系列) + 规格 同一行
-  final degSpecVal = [seriesVal, specVal].where((s) => s.isNotEmpty).join(' ');
+  final degSpecVal = [seriesVal, specVal].where((s) => s.isNotEmpty).join('    ');
   final dateVal   = (productionDate ?? '').isNotEmpty
       ? (productionDate!.length > 10 ? productionDate.substring(0, 10) : productionDate)
       : '—';
@@ -332,6 +360,7 @@ Future<void> printProductLabelImpl({
   if (await _printFlatLabelThermal(
       shop: shopName,
       name: name,
+      code: code,
       degSpec: degSpecVal,
       date: dateVal == '—' ? '' : dateVal, // 无生产日期(商品详情)则不显示该行
       qrBytes: qrBytes,
@@ -398,6 +427,12 @@ Future<void> printProductLabelImpl({
                               fontWeight: pw.FontWeight.bold,
                               color: _ink, letterSpacing: 0.3)),
                       pw.SizedBox(height: 2.5),
+                      // 商品编号（度数上方）
+                      if (code.isNotEmpty) ...[
+                        pw.Text('编号：$code',
+                            style: pw.TextStyle(font: font, fontSize: 5.5, color: _ink)),
+                        pw.SizedBox(height: 1.5),
+                      ],
                       // 度数(系列) + 规格 同一行, 无字段名标签
                       pw.Text(degSpecVal,
                           style: pw.TextStyle(font: font, fontSize: 5.5, color: _ink)),
@@ -473,7 +508,7 @@ Future<void> printProductLabelImpl({
 Future<Uint8List> renderLabelPreviewImpl(LabelData label) async {
   final specVal = (label.spec ?? '').isNotEmpty ? label.spec! : '';
   final seriesVal = (label.series ?? '').isNotEmpty ? label.series! : '';
-  final degSpecVal = [seriesVal, specVal].where((s) => s.isNotEmpty).join(' ');
+  final degSpecVal = [seriesVal, specVal].where((s) => s.isNotEmpty).join('    ');
   final dateVal = (label.productionDate ?? '').isNotEmpty
       ? (label.productionDate!.length > 10
           ? label.productionDate!.substring(0, 10)
@@ -482,6 +517,7 @@ Future<Uint8List> renderLabelPreviewImpl(LabelData label) async {
   final img = await _renderLabelBitmap(
     shop: label.shopName,
     name: label.name,
+    code: label.code,
     degSpec: degSpecVal,
     date: dateVal,
     qrBytes: label.qrBytes!,
@@ -501,7 +537,7 @@ Future<List<String>> listLabelPrintersImpl() async {
         return (r.stdout as String)
             .split('\n')
             .map((s) => s.trim())
-            .where((s) => s.isNotEmpty)
+            .where((s) => s.isNotEmpty && _isThermalName(s))
             .toList();
       }
     } catch (e) {
@@ -511,7 +547,10 @@ Future<List<String>> listLabelPrintersImpl() async {
   }
   if (Platform.isWindows) {
     try {
-      return (await Printing.listPrinters()).map((p) => p.name).toList();
+      return (await Printing.listPrinters())
+          .map((p) => p.name)
+          .where((n) => _isThermalName(n))
+          .toList();
     } catch (e) {
       debugPrint('[label] listPrinters 失败: $e');
     }

client/lib/screens/inventory/inventory_list_screen.dart

@@ -12,7 +12,7 @@ import '../../core/auth/auth_state.dart';
 import '../../providers/inventory_provider.dart';
 import '../../widgets/data_table_card.dart';
 import '../../widgets/mobile_list_card.dart';
-import '../../widgets/multi_select_dropdown.dart' show FilterableColumnHeader;
+import '../../widgets/multi_select_dropdown.dart' show ColDef, ColumnToggleButton, FilterableColumnHeader;
 import '../../widgets/page_scaffold.dart';
 import '../../core/utils/export_util.dart';
 import '../../core/utils/print_util.dart';
@@ -36,6 +36,24 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
   Set<String> _filterWarehouse = {};
   Set<String> _filterSpec = {};
   Set<String> _filterSeries = {};
+  Set<String> _hiddenCols = {};
+
+  static const _colDefs = [
+    ColDef('code', '商品编码', required: true),
+    ColDef('name', '商品名称', required: true),
+    ColDef('spec', '规格'),
+    ColDef('series', '系列'),
+    ColDef('batch', '批次号'),
+    ColDef('warehouse', '仓库'),
+    ColDef('qty', '库存量'),
+    ColDef('price', '单价'),
+    ColDef('prodDate', '生产日期'),
+    ColDef('inTime', '入库时间'),
+    ColDef('supplier', '供应商'),
+    ColDef('remark', '备注'),
+    ColDef('status', '状态'),
+    ColDef('actions', '操作', required: true),
+  ];
 
 
   @override
@@ -222,6 +240,91 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
     );
   }
 
+  /// 库存查询：宽屏表格单元格（按列 key 返回对应 DataCell）
+  DataCell _buildInventoryCell(String key, Inventory item, BuildContext context) {
+    return switch (key) {
+      'code' => DataCell(Text(
+          item.productCode.isEmpty ? '-' : item.productCode,
+          style: const TextStyle(
+              fontFamily: 'monospace', fontSize: 12, color: AppTheme.textSecondary))),
+      'name' => DataCell(item.productId != null
+          ? GestureDetector(
+              onTap: () => context.push('/products/${item.productId}'),
+              child: SizedBox(
+                width: 180,
+                child: Text(
+                  item.productName.isEmpty ? '-' : item.productName,
+                  overflow: TextOverflow.ellipsis,
+                  style: const TextStyle(
+                    color: AppTheme.primary,
+                    decoration: TextDecoration.underline,
+                    decorationColor: AppTheme.primary,
+                  ),
+                ),
+              ),
+            )
+          : Text(item.productName.isEmpty ? '-' : item.productName,
+              overflow: TextOverflow.ellipsis)),
+      'spec' => DataCell(Text(item.spec.isEmpty ? '-' : item.spec)),
+      'series' => DataCell(Text(item.series.isEmpty ? '-' : item.series)),
+      'batch' => DataCell(Text(item.batchNo.isEmpty ? '-' : item.batchNo,
+          style: const TextStyle(fontFamily: 'monospace', fontSize: 12))),
+      'warehouse' => DataCell(Text(item.warehouseName.isEmpty ? '-' : item.warehouseName)),
+      'qty' => DataCell(Text(
+          '${item.quantity.toStringAsFixed(0)} ${item.unit}'.trim(),
+          style: TextStyle(
+              fontWeight: FontWeight.w600,
+              color: item.quantity == 0
+                  ? AppTheme.danger
+                  : (item.minStock != null && item.quantity < item.minStock!)
+                      ? AppTheme.accent
+                      : AppTheme.textPrimary))),
+      'price' => DataCell(Text(
+          item.unitPrice != null ? '¥${item.unitPrice!.toStringAsFixed(2)}' : '-')),
+      'prodDate' => DataCell(Text(item.productionDate ?? '-')),
+      'inTime' => DataCell(Text(
+          item.createdAt != null && item.createdAt!.length >= 10
+              ? item.createdAt!.substring(0, 10)
+              : '-',
+          style: const TextStyle(fontSize: 12, color: AppTheme.textSecondary))),
+      'supplier' => DataCell(Text(item.supplierName.isEmpty ? '-' : item.supplierName)),
+      'remark' => DataCell(Tooltip(
+          message: item.remark.isEmpty ? '' : item.remark,
+          waitDuration: const Duration(milliseconds: 300),
+          child: GestureDetector(
+            onTap: () => _editRemark(context, item),
+            child: Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                Text(
+                  item.remark.isEmpty
+                      ? '—'
+                      : item.remark.length > 4
+                          ? '${item.remark.substring(0, 4)}…'
+                          : item.remark,
+                  style: TextStyle(
+                    color: item.remark.isEmpty
+                        ? AppTheme.textSecondary
+                        : AppTheme.textPrimary,
+                  ),
+                ),
+                const SizedBox(width: 4),
+                const Icon(Icons.edit_outlined, size: 12, color: AppTheme.textSecondary),
+              ],
+            ),
+          ))),
+      'status' => DataCell(_InventoryStatusBadge(item)),
+      'actions' => DataCell(item.productId != null
+          ? TextButton(
+              onPressed: () => _printLabel(context, item),
+              child: const Text('打标签',
+                  style: TextStyle(fontSize: 12, color: AppTheme.primary)),
+            )
+          : const SizedBox()),
+      _ => const DataCell(SizedBox()),
+    };
+  }
+
   /// 库存查询：窄屏卡片
   Widget _inventoryCard(Inventory item) {
     return MobileListCard(
@@ -392,6 +495,9 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
             ? items
             : items.where((i) => _filterWarehouse.contains(i.warehouseName)).toList();
 
+        final visibleCols =
+            _colDefs.where((c) => !_hiddenCols.contains(c.key)).toList();
+
         return Column(
           children: [
             // Summary cards（窄屏横向滚动，宽屏等分）
@@ -481,6 +587,12 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
                       icon: const Icon(Icons.download, size: 16),
                       label: const Text('导出'),
                     ),
+                    const SizedBox(width: 8),
+                    ColumnToggleButton(
+                      columns: _colDefs,
+                      hidden: _hiddenCols,
+                      onChanged: (v) => setState(() => _hiddenCols = v),
+                    ),
                     const Spacer(),
                     SizedBox(
                       width: 220,
@@ -503,68 +615,48 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
                 ),
                 mobileCards:
                     filteredItems.map(_inventoryCard).toList(),
-                columns: [
-                  const DataColumn(label: Text('商品编码')),
-                  const DataColumn(label: Text('商品名称')),
-                  DataColumn(
-                    label: FilterableColumnHeader(
-                      text: '规格',
-                      options: specOptions,
-                      selected: _filterSpec,
-                      onChanged: (v) {
-                        setState(() => _filterSpec = v);
-                        ref.read(inventoryListProvider.notifier).setSpec(v.toList());
-                      },
-                    ),
-                  ),
-                  DataColumn(
-                    label: FilterableColumnHeader(
-                      text: '系列',
-                      options: seriesOptions,
-                      selected: _filterSeries,
-                      onChanged: (v) {
-                        setState(() => _filterSeries = v);
-                        ref.read(inventoryListProvider.notifier).setSeries(v.toList());
-                      },
-                    ),
-                  ),
-                  const DataColumn(label: Text('批次号')),
-                  DataColumn(
-                    label: FilterableColumnHeader(
-                      text: '仓库',
-                      options: warehouseOptions,
-                      selected: _filterWarehouse,
-                      onChanged: (v) => setState(() => _filterWarehouse = v),
-                    ),
-                  ),
-                  const DataColumn(label: Text('库存量'), numeric: true),
-                  const DataColumn(label: Text('单价'), numeric: true),
-                  const DataColumn(label: Text('生产日期')),
-                  const DataColumn(label: Text('入库时间')),
-                  const DataColumn(label: Text('供应商')),
-                  const DataColumn(label: Text('备注')),
-                  const DataColumn(label: Text('状态')),
-                  const DataColumn(label: Text('操作')),
-                ],
+                columns: visibleCols.map((c) {
+                  final label = switch (c.key) {
+                    'spec' => FilterableColumnHeader(
+                        text: c.label,
+                        options: specOptions,
+                        selected: _filterSpec,
+                        onChanged: (v) {
+                          setState(() => _filterSpec = v);
+                          ref.read(inventoryListProvider.notifier).setSpec(v.toList());
+                        },
+                      ),
+                    'series' => FilterableColumnHeader(
+                        text: c.label,
+                        options: seriesOptions,
+                        selected: _filterSeries,
+                        onChanged: (v) {
+                          setState(() => _filterSeries = v);
+                          ref.read(inventoryListProvider.notifier).setSeries(v.toList());
+                        },
+                      ),
+                    'warehouse' => FilterableColumnHeader(
+                        text: c.label,
+                        options: warehouseOptions,
+                        selected: _filterWarehouse,
+                        onChanged: (v) => setState(() => _filterWarehouse = v),
+                      ),
+                    _ => Text(c.label),
+                  };
+                  return DataColumn(
+                    label: label,
+                    numeric: c.key == 'qty' || c.key == 'price',
+                  );
+                }).toList(),
                 rows: items.isEmpty
                     ? [
-                        const DataRow(cells: [
-                          DataCell(SizedBox()),
-                          DataCell(Text('暂无库存数据',
+                        DataRow(cells: [
+                          const DataCell(SizedBox()),
+                          const DataCell(Text('暂无库存数据',
                               style: TextStyle(
                                   color: AppTheme.textSecondary))),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
-                          DataCell(SizedBox()),
+                          for (int i = 2; i < visibleCols.length; i++)
+                            const DataCell(SizedBox()),
                         ])
                       ]
                     : filteredItems
@@ -572,129 +664,17 @@ class _InventoryListScreenState extends ConsumerState<InventoryListScreen> {
                               color: WidgetStateProperty.resolveWith(
                                   (states) {
                                 if (item.quantity == 0) {
-                                  return AppTheme.danger.withOpacity(0.04);
+                                  return AppTheme.danger.withValues(alpha: 0.04);
                                 }
                                 if (item.minStock != null &&
                                     item.quantity < item.minStock!) {
-                                  return AppTheme.accent.withOpacity(0.04);
+                                  return AppTheme.accent.withValues(alpha: 0.04);
                                 }
                                 return null;
                               }),
-                              cells: [
-                                DataCell(Text(
-                                    item.productCode.isEmpty ? '-' : item.productCode,
-                                    style: const TextStyle(
-                                        fontFamily: 'monospace',
-                                        fontSize: 12,
-                                        color: AppTheme.textSecondary))),
-                                DataCell(item.productId != null
-                                    ? GestureDetector(
-                                        onTap: () => context.push('/products/${item.productId}'),
-                                        child: SizedBox(
-                                          width: 180,
-                                          child: Text(
-                                            item.productName.isEmpty ? '-' : item.productName,
-                                            overflow: TextOverflow.ellipsis,
-                                            style: const TextStyle(
-                                              color: AppTheme.primary,
-                                              decoration: TextDecoration.underline,
-                                              decorationColor: AppTheme.primary,
-                                            ),
-                                          ),
-                                        ),
-                                      )
-                                    : Text(item.productName.isEmpty ? '-' : item.productName,
-                                        overflow: TextOverflow.ellipsis)),
-                                DataCell(Text(item.spec.isEmpty ? '-' : item.spec)),
-                                DataCell(Text(item.series.isEmpty ? '-' : item.series)),
-                                DataCell(Text(item.batchNo.isEmpty ? '-' : item.batchNo,
-                                    style: const TextStyle(fontFamily: 'monospace', fontSize: 12))),
-                                DataCell(Text(item.warehouseName.isEmpty ? '-' : item.warehouseName)),
-                                DataCell(Text(
-                                  '${item.quantity.toStringAsFixed(0)} ${item.unit}'.trim(),
-                                  style: TextStyle(
-                                      fontWeight: FontWeight.w600,
-                                      color: item.quantity == 0
-                                          ? AppTheme.danger
-                                          : (item.minStock != null &&
-                                                  item.quantity <
-                                                      item.minStock!)
-                                              ? AppTheme.accent
-                                              : AppTheme.textPrimary),
-                                )),
-                                DataCell(Text(
-                                  item.unitPrice != null
-                                      ? '¥${item.unitPrice!.toStringAsFixed(2)}'
-                                      : '-',
-                                )),
-                                DataCell(Text(item.productionDate ?? '-')),
-                                DataCell(Text(
-                                  item.createdAt != null && item.createdAt!.length >= 10
-                                      ? item.createdAt!.substring(0, 10)
-                                      : '-',
-                                  style: const TextStyle(fontSize: 12, color: AppTheme.textSecondary),
-                                )),
-                                DataCell(Text(item.supplierName.isEmpty ? '-' : item.supplierName)),
-                                DataCell(
-                                  Tooltip(
-                                    message: item.remark.isEmpty ? '' : item.remark,
-                                    waitDuration: const Duration(milliseconds: 300),
-                                    child: GestureDetector(
-                                      onTap: () => _editRemark(context, item),
-                                      child: Row(
-                                        mainAxisSize: MainAxisSize.min,
-                                        children: [
-                                          Text(
-                                            item.remark.isEmpty
-                                                ? '—'
-                                                : item.remark.length > 4
-                                                    ? '${item.remark.substring(0, 4)}…'
-                                                    : item.remark,
-                                            style: TextStyle(
-                                              color: item.remark.isEmpty
-                                                  ? AppTheme.textSecondary
-                                                  : AppTheme.textPrimary,
-                                            ),
-                                          ),
-                                          const SizedBox(width: 4),
-                                          const Icon(Icons.edit_outlined,
-                                              size: 12, color: AppTheme.textSecondary),
-                                        ],
-                                      ),
-                                    ),
-                                  ),
-                                ),
-                                DataCell(_InventoryStatusBadge(item)),
-                                DataCell(
-                                  item.productId != null
-                                      ? TextButton(
-                                          onPressed: () async {
-                                            final qrBytes = await ref
-                                                .read(productRepositoryProvider)
-                                                .getQRCodeBytes(item.productId!);
-                                            final shopInfo = ref.read(shopInfoProvider).valueOrNull;
-                                            if (context.mounted) {
-                                              await safePrint(context, () => printProductLabel(
-                                                qrBytes: qrBytes,
-                                                name: item.productName,
-                                                code: item.productCode,
-                                                series: item.series.isEmpty ? null : item.series,
-                                                spec: item.spec.isEmpty ? null : item.spec,
-                                                batchNo: item.batchNo.isEmpty ? null : item.batchNo,
-                                                productionDate: item.productionDate,
-                                                remark: item.remark.isEmpty ? null : item.remark,
-                                                shopName: shopInfo?.name ?? '',
-                                                shopAddress: shopInfo?.address ?? '',
-                                                shopPhone: shopInfo?.phone ?? '',
-                                              ));
-                                            }
-                                          },
-                                          child: const Text('打标签',
-                                              style: TextStyle(fontSize: 12, color: AppTheme.primary)),
-                                        )
-                                      : const SizedBox(),
-                                ),
-                              ],
+                              cells: visibleCols
+                                  .map((c) => _buildInventoryCell(c.key, item, context))
+                                  .toList(),
                             ))
                         .toList(),
               ),

client/lib/screens/public/public_product_screen.dart

@@ -2,6 +2,7 @@ import 'dart:math' as math;
 import 'package:dio/dio.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:go_router/go_router.dart';
 import 'package:url_launcher/url_launcher.dart';
 import '../../core/config/app_config.dart';
@@ -54,6 +55,13 @@ class _PublicProductScreenState extends State<PublicProductScreen> {
       );
       final data = (resp.data as Map<String, dynamic>)['data'] as Map<String, dynamic>;
       setState(() { _data = data; _loading = false; });
+      // 更新浏览器标签标题（Flutter Web 会写 document.title）
+      final name = data['name'] as String? ?? '';
+      if (name.isNotEmpty) {
+        SystemChrome.setApplicationSwitcherDescription(
+          ApplicationSwitcherDescription(label: name, primaryColor: 0xFF8B2331),
+        );
+      }
     } catch (e) {
       setState(() { _error = e.toString(); _loading = false; });
     }

client/lib/widgets/data_table_card.dart

@@ -36,10 +36,14 @@ class DataTableCard extends StatefulWidget {
 class _DataTableCardState extends State<DataTableCard> {
   // 当前悬停行的索引（-1 表示无悬停）
   final _hoveredRow = ValueNotifier<int>(-1);
+  final _vCtrl = ScrollController();
+  final _hCtrl = ScrollController();
 
   @override
   void dispose() {
     _hoveredRow.dispose();
+    _vCtrl.dispose();
+    _hCtrl.dispose();
     super.dispose();
   }
 
@@ -89,24 +93,35 @@ class _DataTableCardState extends State<DataTableCard> {
 
   Widget _buildTable() {
     return LayoutBuilder(
-      builder: (context, constraints) => SingleChildScrollView(
+      builder: (context, constraints) => Scrollbar(
+        controller: _vCtrl,
+        thumbVisibility: true,
         child: SingleChildScrollView(
-          scrollDirection: Axis.horizontal,
-          child: ConstrainedBox(
-            constraints: BoxConstraints(minWidth: constraints.maxWidth),
-            child: Table(
-              defaultColumnWidth: const IntrinsicColumnWidth(),
-              border: TableBorder(
-                horizontalInside: BorderSide(
-                  color: Colors.grey.shade200,
-                  width: 0.5,
+          controller: _vCtrl,
+          child: Scrollbar(
+            controller: _hCtrl,
+            thumbVisibility: true,
+            scrollbarOrientation: ScrollbarOrientation.bottom,
+            child: SingleChildScrollView(
+              controller: _hCtrl,
+              scrollDirection: Axis.horizontal,
+              child: ConstrainedBox(
+                constraints: BoxConstraints(minWidth: constraints.maxWidth),
+                child: Table(
+                  defaultColumnWidth: const IntrinsicColumnWidth(),
+                  border: TableBorder(
+                    horizontalInside: BorderSide(
+                      color: Colors.grey.shade200,
+                      width: 0.5,
+                    ),
+                  ),
+                  children: [
+                    _buildHeaderRow(),
+                    for (int i = 0; i < widget.rows.length; i++)
+                      _buildDataRow(i, widget.rows[i]),
+                  ],
                 ),
               ),
-              children: [
-                _buildHeaderRow(),
-                for (int i = 0; i < widget.rows.length; i++)
-                  _buildDataRow(i, widget.rows[i]),
-              ],
             ),
           ),
         ),

client/lib/widgets/label_preview_dialog.dart

@@ -36,6 +36,7 @@ class _LabelPreviewDialogState extends State<LabelPreviewDialog> {
   List<String> _printers = [];
   String? _printer;
   bool _printing = false;
+  bool _printersChecked = false;
   String _status = '';
 
   @override
@@ -63,6 +64,7 @@ class _LabelPreviewDialogState extends State<LabelPreviewDialog> {
       setState(() {
         _printers = printers;
         _printer = selected;
+        _printersChecked = true;
       });
     }
 
@@ -147,6 +149,7 @@ class _LabelPreviewDialogState extends State<LabelPreviewDialog> {
         _printing = false;
         _status = '完成，共打印 $done 张';
       });
+      Navigator.of(context).pop();
     }
   }
 
@@ -329,8 +332,9 @@ class _LabelPreviewDialogState extends State<LabelPreviewDialog> {
                   const SizedBox(width: 8),
                   Expanded(
                     child: _printers.isEmpty
-                        ? const Text('检测中或未检测到打印机...',
-                            style: TextStyle(
+                        ? Text(
+                            _printersChecked ? '无打印机可用' : '正在检测打印机...',
+                            style: const TextStyle(
                                 fontSize: 13,
                                 color: AppTheme.textSecondary))
                         : DropdownButtonHideUnderline(
@@ -419,7 +423,9 @@ class _LabelPreviewDialogState extends State<LabelPreviewDialog> {
                   ),
                   const SizedBox(width: 8),
                   FilledButton(
-                    onPressed: (_printing || totalCount == 0) ? null : _doPrint,
+                    onPressed: (_printing || totalCount == 0 || _printer == null)
+                        ? null
+                        : _doPrint,
                     child: Text(
                         _printing ? '打印中...' : '打印 $totalCount 张'),
                   ),

deploy/nginx-jiu.conf

@@ -47,10 +47,22 @@ server {
         expires 0;
     }
 
-    # 公开商品详情页（扫码跳转）→ 交给 Flutter Web 路由处理
+    # 公开商品详情页（扫码跳转）→ 后端注入 OG 标签后返回 Flutter index.html
     location ~ ^/product/ {
-        root /opt/jiu/web;
-        try_files $uri /app/index.html;
+        proxy_pass         http://127.0.0.1:8080;
+        proxy_set_header   Host $host;
+        proxy_set_header   X-Real-IP $remote_addr;
+        proxy_read_timeout 30s;
+    }
+
+    # Flutter 路由会把 /product/:id 重写为 /app/product/:id（base-href=/app/）
+    # 分享此 URL 时微信爬虫也需要 OG 标签 → 去掉 /app 前缀后转发后端
+    location ~ ^/app/product/ {
+        rewrite ^/app(/product/.+)$ $1 break;
+        proxy_pass         http://127.0.0.1:8080;
+        proxy_set_header   Host $host;
+        proxy_set_header   X-Real-IP $remote_addr;
+        proxy_read_timeout 30s;
     }
 
     # 桌面客户端安装包下载（Windows .exe / macOS .zip）

deploy/production.env.template

@@ -9,4 +9,5 @@ LICENSE_HMAC_SECRET=CHANGE_ME_RANDOM_32CHARS
 STORAGE_UPLOAD_DIR=/opt/jiu/images
 STORAGE_BASE_URL=https://jiu.51yanmei.com/images
 STORAGE_PUBLIC_URL=https://jiu.51yanmei.com
+STORAGE_WEB_DIR=/opt/jiu/web
 DB_PASSWORD=CHANGE_ME_DB_PASS