fix(eh): 标题不再带 " - Tags"，并附批量改名脚本

meta description 的真实格式是
  "Free Hentai Misc Gallery:  <title> - Tags: a, b, c"
旧正则 `Gallery:\s*([^:]+):` 里的 [^:]+ 是贪婪的，
一路吃到标签段自己的冒号为止，把 " - Tags" 也吞进了标题，
导致下载目录/文件名结尾凭空多出 " - Tags"。

改为显式认 " - Tags:" 这个分隔符（Tags 段可选，无标签时认行尾），
reTitleSuffix 同时认 Tags 结尾，提取后再兜底剥一次。

线上实测（g/4239272）：标题由
  "Hinata l Boruto (CriticalHAI) [AI Generated] - Tags"
变为
  "Hinata l Boruto (CriticalHAI) [AI Generated]"

附带 remove-tags-suffix.bat/.ps1：递归去掉已有压缩包文件名结尾的
" - Tags"，覆盖 zip/rar/7z/cbz/cbr/cb7/tar/gz，幂等。

internal/eh/eh.go

@@ -156,7 +156,7 @@ type Gallery struct {
 var (
 	reTitleTag    = regexp.MustCompile(`(?is)<title>(.*?)</title>`)
 	reMetaDesc    = regexp.MustCompile(`(?i)<meta\s+name="description"\s+content="([^"]*)"`)
-	reTitleSuffix = regexp.MustCompile(`(?i)\s*-\s*E-Hentai Galleries\s*$`)
+	reTitleSuffix = regexp.MustCompile(`(?i)\s*-\s*(?:E-Hentai Galleries|Tags)\s*$`)
 	reTotal       = regexp.MustCompile(`(?i)Showing\s+\d+\s*-\s*\d+\s+of\s+(\d+)\s+images`)
 	// <a href="/s/xxx"><div title="Page 1: 原名"
 	reThumbLink     = regexp.MustCompile(`(?is)<a\s+href="((?:https://e-hentai\.org)?/s/[^"]+)"[^>]*>\s*<div\s+title="Page\s+(\d+):\s*([^"]*)"`)
@@ -164,7 +164,11 @@ var (
 	reArtistBracket = regexp.MustCompile(`^\s*\[([^\]]{1,60})\]\s*`)
 	reGroupParen    = regexp.MustCompile(`\(([^)]{1,60})\)`)
 	reCatFromDesc   = regexp.MustCompile(`(?i)Hentai\s+([A-Za-z]+)\s+Gallery`)
-	reTitleFromDesc = regexp.MustCompile(`Gallery:\s*([^:]+):`)
+	// meta description 形如：
+	//   "Free Hentai Misc Gallery:  <title> - Tags: a, b, c"
+	// 标题的结束边界优先认 " - Tags:"（标签段）；没有 Tags 段时认行尾。
+	// ⚠️ 别用 `Gallery:\s*([^:]+):` —— 那个会把 " - Tags" 一起吞进标题。
+	reTitleFromDesc = regexp.MustCompile(`(?is)Gallery:\s*(.*?)(?:\s*-\s*Tags\s*:|\s*$|[.:]\s+\d+\s+images\b)`)
 	reRestricted    = regexp.MustCompile(`(?i)Login Required|restricted|Sad Panda`)
 
 	// #taglist 的每一行：<td class="tc">artist:</td><td><div class="gtl"><a ...>Noxe</a>...</td>
@@ -545,7 +549,8 @@ func (c *Client) FetchGalleryPage(ctx context.Context, gid, token string, onProg
 			}
 			if m := reMetaDesc.FindStringSubmatch(html); m != nil {
 				if nm := reTitleFromDesc.FindStringSubmatch(DecodeEntities(m[1])); nm != nil {
-					title = strings.TrimSpace(nm[1])
+					// 保险：再剥一次尾部 " - Tags"（有些页面 desc 里 Tags 前无空格）
+					title = strings.TrimSpace(reTitleSuffix.ReplaceAllString(nm[1], ""))
 				}
 			}
 			if m := reTotal.FindStringSubmatch(html); m != nil {

internal/eh/title_test.go

@@ -0,0 +1,72 @@
+package eh
+
+// 回归测试：文件名尾巴多出 " - Tags"（2026-10 线上问题）
+//
+// 现象：下载下来的目录/压缩包名全是 "... - Tags"，原本标题没有这个。
+//
+// 根因：meta description 的真实格式是
+//   "Free Hentai Misc Gallery:  <title> - Tags: a, b, c"
+// 旧正则 `Gallery:\s*([^:]+):` 里的 `[^:]+` 是贪婪的，它一路吃到
+// 标签段自己的那个冒号为止，于是把 " - Tags" 也当成标题的一部分。
+//
+// 正确做法：标题的结束边界就是 " - Tags:"，必须显式认这个分隔符。
+
+import "testing"
+
+func TestTitleFromDescStripsTags(t *testing.T) {
+	tests := []struct {
+		name string
+		desc string
+		want string
+	}{
+		{
+			name: "带 Tags 段（线上真实样本）",
+			desc: "Free Hentai Misc Gallery:  Hinata l Boruto (CriticalHAI) [AI Generated] - Tags: boruto, hinata hyuga, sole female, ai generated",
+			want: "Hinata l Boruto (CriticalHAI) [AI Generated]",
+		},
+		{
+			name: "无 Tags 段",
+			desc: "Free Hentai Doujinshi Gallery: [Some Circle] Flagged Gallery",
+			want: "[Some Circle] Flagged Gallery",
+		},
+		{
+			name: "Tags 前多空格",
+			desc: "Free Hentai Manga Gallery:   Some Title   - Tags: a, b",
+			want: "Some Title",
+		},
+		{
+			name: "标题本身含冒号（竖线译名等）",
+			desc: "Free Hentai Misc Gallery:  [A] Orig | 译名 - Tags: x",
+			want: "[A] Orig | 译名",
+		},
+		{
+			name: "标题本身以 Tags 结尾也不能被剥",
+			desc: "Free Hentai Misc Gallery:  Study About Tags - Tags: a",
+			want: "Study About Tags",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			m := reTitleFromDesc.FindStringSubmatch(tt.desc)
+			if m == nil {
+				t.Fatalf("没匹配到标题: %q", tt.desc)
+			}
+			got := reTitleSuffix.ReplaceAllString(m[1], "")
+			if got != tt.want {
+				t.Errorf("标题不对:\n got %q\nwant %q", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestTitleTagStripsTagsSuffix(t *testing.T) {
+	// <title> 一般是 "... - E-Hentai Galleries"，但也可能直接是 "... - Tags"
+	m := reTitleTag.FindStringSubmatch("<title>Some Gallery - Tags</title>")
+	if m == nil {
+		t.Fatal("没取到 <title>")
+	}
+	if got := reTitleSuffix.ReplaceAllString(m[1], ""); got != "Some Gallery" {
+		t.Errorf("title 去 Tags 失败: %q", got)
+	}
+}

remove-tags-suffix.bat

@@ -0,0 +1,4 @@
+@echo off
+chcp 65001 >nul
+powershell -NoProfile -ExecutionPolicy Bypass -File "%~dp0remove-tags-suffix.ps1"
+pause

remove-tags-suffix.ps1

@@ -0,0 +1,66 @@
+<#
+  去掉压缩包文件名结尾的 " - Tags"
+  递归遍历「脚本所在目录」下所有层级。
+  支持扩展名: .zip .rar .7z .cbz .cbr .cb7 .tar .gz
+#>
+
+$ErrorActionPreference = 'Stop'
+[Console]::OutputEncoding = [System.Text.Encoding]::UTF8
+
+$root     = $PSScriptRoot
+$suffix   = ' - Tags'
+$arcExts  = @('.zip', '.rar', '.7z', '.cbz', '.cbr', '.cb7', '.tar', '.gz')
+
+Write-Host "正在递归扫描: $root" -ForegroundColor Cyan
+Write-Host ''
+
+$found = 0
+$done  = 0
+$fail  = 0
+
+$files = Get-ChildItem -LiteralPath $root -Recurse -File -Force -ErrorAction SilentlyContinue |
+         Where-Object { $arcExts -contains $_.Extension.ToLower() }
+
+foreach ($f in $files) {
+    $name = $f.Name
+    $base = [System.IO.Path]::GetFileNameWithoutExtension($name)
+    $ext  = $f.Extension
+
+    # ⚠️ 必须对「去掉扩展名后的名字」判断。
+    # 直接拿 "xxx - Tags.zip" 去 EndsWith(" - Tags") 永远为 False。
+    if (-not $base.ToLower().EndsWith($suffix.ToLower())) { continue }
+
+    $newBase = $base.Substring(0, $base.Length - $suffix.Length).TrimEnd(' ', '.')
+
+    # 防止改名后变成空名 / 非法名
+    if ([string]::IsNullOrWhiteSpace($newBase)) {
+        Write-Host "  [跳过] 去掉后缀后名字为空: $name" -ForegroundColor Yellow
+        continue
+    }
+    if ($newBase -match '[\\/:*?"<>|]') {
+        Write-Host "  [跳过] 新名字含非法字符: $newBase" -ForegroundColor Yellow
+        continue
+    }
+
+    $newName = $newBase + $ext
+    if ($newName -eq $name) { continue }
+
+    $found++
+    Write-Host "  [找到] $name"
+    Write-Host "      -> $newName" -ForegroundColor DarkGray
+
+    $target = Join-Path $f.DirectoryName $newName
+    try {
+        Rename-Item -LiteralPath $f.FullName -NewName $newName -ErrorAction Stop
+        Write-Host "      [完成]" -ForegroundColor Green
+        $done++
+    } catch {
+        Write-Host "      [失败] $($_.Exception.Message)" -ForegroundColor Red
+        $fail++
+    }
+}
+
+Write-Host ''
+Write-Host '============================================' -ForegroundColor Cyan
+Write-Host "完成：命中 $found 个，成功 $done 个，失败 $fail 个" -ForegroundColor Cyan
+Write-Host '============================================' -ForegroundColor Cyan