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 +5,43 @@ 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

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

@@ -6,6 +6,7 @@ import (
 	"html"
 	"net/http"
 	"os"
+	"regexp"
 	"strconv"
 	"strings"
 
@@ -315,7 +316,9 @@ func (h *PublicHandler) ProductPage(c *gin.Context) {
 	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
-	out := strings.Replace(idxHTML, "<title>岩美</title>", "<title>"+html.EscapeString(ogTitle)+"</title>", 1)
+	// 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")
@@ -340,14 +343,21 @@ func buildOGTitle(product model.Product) string {
 func buildProductOG(product model.Product, shopName, publicURL string) string {
 	title := buildOGTitle(product)
 
-	// og:description：规格（度数/香型/容量）| 门店名正品
+	// og:description：系列（度数/香型）· 规格（容量/单位）| 门店名正品
-	desc := product.Spec
+	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 + " | " + suffix
+		desc = desc + "\n" + suffix
 	} else {
 		desc = suffix
 	}
@@ -359,7 +369,7 @@ func buildProductOG(product model.Product, shopName, publicURL string) string {
 	}
 
 	// og:url
-	pageURL := publicURL + "/product/" + product.PublicID
+	pageURL := publicURL + "/app/product/" + product.PublicID
 
 	var sb strings.Builder
 	sb.WriteString("\n")

client/lib/core/utils/print_util_stub.dart

@@ -189,7 +189,8 @@ 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,
@@ -199,10 +200,13 @@ Future<ui.Image> _renderLabelBitmap({
   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));
 
@@ -236,8 +240,8 @@ Future<ui.Image> _renderLabelBitmap({
 
   final codeText = code.isNotEmpty ? '编号：$code' : '';
   final rows = <(String, double, bool)>[
-    if (shop.isNotEmpty)     (shop,    kShopSize,  true),
+    if (shop.isNotEmpty)     (shop,    kShopSize,  false), // 店名细体，突出商品名
-    if (name.isNotEmpty)     (name,    nameSize,   true),
+    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),
@@ -258,7 +262,7 @@ Future<ui.Image> _renderLabelBitmap({
     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。
@@ -279,11 +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, 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;
@@ -294,12 +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;
+      // 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）
-      final a = rgba[i + 3];
+      double lum = 0;
-      final lum = a < 128
+      for (int dy = 0; dy < 2; dy++) {
-          ? 255.0
+        for (int dx = 0; dx < 2; dx++) {
-          : 0.299 * rgba[i] + 0.587 * rgba[i + 1] + 0.114 * rgba[i + 2];
+          final i = ((yy * 2 + dy) * sw + (xx * 2 + dx)) * 4;
-      if (lum < 128) row[xx >> 3] &= ~(0x80 >> (xx & 7)); // 黑点 -> bit0
+          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);
   }

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; });
     }

deploy/nginx-jiu.conf

@@ -55,6 +55,16 @@ server {
         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）
     location /downloads/ {
         alias /opt/jiu/downloads/;