feat: 上线前安全加固与发布工程化；appmall 由插件迁移为独立应用

安全（P0）
- 发布包签名：新增 scripts/package_keygen.php、scripts/package_verify.php、
  ywxapp\service\PackageVerifier；FrameworkService::apply() 解压前强制验签
  （ywxapp.framework_package_verify，默认开启）
- JWT 收紧：config/jwt.php 移除公开默认密钥，JwtService::assertStrongSecret()
  校验非空 / 长度≥32 / 已知弱值；.env.production.example 键名由 JWT_SECRET_KEY 修正为 JWT_SECRET
- /api/v1/Article：免登录白名单收窄为只读接口，写操作字段白名单 + assertOwner() 越权校验
- 开发者令牌：查找接口不再回显明文、统一失败文案 + 限流
- TemplateInstaller：文件名白名单 + realpath 归一化 + 目录内断言，修复 Zip Slip；补 use ZipArchive
- 后台登录：接入验证码、失败锁定与登录限流（config/ratelimit.php）
- 缓存 / Session 驱动可由 .env 覆盖（CACHE_DRIVER / SESSION_TYPE），集群部署改 redis
- paycenter 支付日志开关改为 PAY_LOG，不再跟随 APP_DEBUG

工程化 / 交付
- 新增 CHANGELOG.md 与 .env.production.example；composer.lock 入库锁定依赖版本
- 插件离线安装 CLI 增加 --uid，后台上传安装透传 uid，付费插件授权校验可通过
- 授权拒绝文案区分「未携带 uid」与「未找到有效授权」，便于排障
- .gitignore 放行 .env.production.example / .env.addon.example / .gitattributes / public/.htaccess

结构
- appmall 由 addon/appmall 迁移为独立应用 app/appmall（市场 / 开发者中心 / 审核 / 分润）

addon/docs/view/frontend/index/index.html

@@ -7,7 +7,7 @@
     <div class="dc-hero-inner">
         <h1>{$docsTitle}</h1>
         <p>框架架构、插件开发、会员支付与命令行工具的完整说明，共收录 {$totalDocs} 篇文档</p>
-        <form class="dc-hero-search" action="/docs/search" method="get">
+        <form class="dc-hero-search" action="{$docsBase}/search" method="get">
             <input type="text" name="kw" placeholder="搜索你想了解的内容..." autocomplete="off">
             <button type="submit">搜索</button>
         </form>
@@ -33,7 +33,7 @@
                     {/if}
                 </div>
                 <div class="dc-project-info">
-                    <h2><a href="/docs/{$p.name}">{$p.title}</a></h2>
+                    <h2><a href="{$docsBase}/{$p.name}">{$p.title}</a></h2>
                     <p>{$p.intro|default='暂无简介'}</p>
                 </div>
             </div>
@@ -50,12 +50,12 @@
             {if condition="!empty($p.recent)"}
             <ul class="dc-project-recent">
                 {volist name="p.recent" id="r"}
-                <li><a href="/docs/{$p.name}/{$r.name}">{$r.title}</a></li>
+                <li><a href="{$docsBase}/{$p.name}/{$r.name}">{$r.title}</a></li>
                 {/volist}
             </ul>
             {/if}
 
-            <a class="dc-project-enter" href="/docs/{$p.name}">进入文档 →</a>
+            <a class="dc-project-enter" href="{$docsBase}/{$p.name}">进入文档 →</a>
         </div>
         {/volist}
     </div>

addon/docs/view/frontend/layout.html

@@ -6,6 +6,8 @@
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta name="keywords" content="{block name="keywords"}YwxApp,文档中心{/block}">
     <meta name="description" content="{block name="description"}{$docsTitle}{/block}">
+    <link rel="canonical" href="{block name="canonical"}{$docsBase}{/block}">
+    <meta name="robots" content="{block name="robots"}index,follow{/block}">
     <link rel="stylesheet" href="/static/docs/css/docs.css">
     {block name="css"}{/block}
 </head>
@@ -13,21 +15,21 @@
 
 <header class="dc-header">
     <div class="dc-header-inner">
-        <a class="dc-logo" href="/docs">
+        <a class="dc-logo" href="{$docsBase}">
             <span class="dc-logo-mark">Y</span>
             <span class="dc-logo-text">{$docsTitle}</span>
         </a>
 
         <nav class="dc-nav">
-            <a href="/docs">文档首页</a>
+            <a href="{$docsBase}">文档首页</a>
             {volist name="projectList" id="p" offset="0" length="5"}
-            <a href="/docs/{$p.name}">{$p.title}</a>
+            <a href="{$docsBase}/{$p.name}">{$p.title}</a>
             {/volist}
             <a href="/" target="_blank">返回官网</a>
         </nav>
 
-        <form class="dc-search" action="/docs/search" method="get">
-            <input type="text" name="kw" value="{$keyword|default=''}" placeholder="搜索文档..." autocomplete="off">
+        <form class="dc-search" action="{$docsBase}/search" method="get">
+            <input type="text" name="kw" value="{$keyword|default=''|htmlspecialchars}" placeholder="搜索文档..." autocomplete="off">
             <button type="submit" aria-label="搜索">
                 <svg viewBox="0 0 24 24" width="16" height="16"><path fill="currentColor" d="M15.5 14h-.79l-.28-.27a6.5 6.5 0 1 0-.7.7l.27.28v.79l5 4.99L20.49 19l-4.99-5Zm-6 0A4.5 4.5 0 1 1 14 9.5 4.5 4.5 0 0 1 9.5 14Z"/></svg>
             </button>
@@ -41,6 +43,7 @@
 
 {block name="body"}{/block}
 
+<script>window.DOCS_BASE = '{$docsBase}';</script>
 <script src="/static/docs/js/docs.js"></script>
 {block name="js"}{/block}
 </body>

addon/docs/view/frontend/read/index.html

@@ -2,6 +2,8 @@
 {block name="title"}{$pageTitle}{/block}
 {block name="keywords"}{$seoKeywords}{/block}
 {block name="description"}{$seoDesc}{/block}
+{* 默认版本用短地址作为 canonical，避免与版本段长地址被搜索引擎视为双内容 *}
+{block name="canonical"}{$docsBase}/{$project.name}/{if condition="$version.is_default eq 1"}{$doc.name}{else}{$version.name}/{$doc.name}{/if}{/block}
 
 {block name="body"}
 <div class="dc-layout">
@@ -25,9 +27,9 @@
 
     <main class="dc-main">
         <div class="dc-crumbs">
-            <a href="/docs">文档中心</a>
+            <a href="{$docsBase}">文档中心</a>
             <span class="dc-crumb-sep">/</span>
-            <a href="/docs/{$project.name}">{$project.title}</a>
+            <a href="{$docsBase}/{$project.name}">{$project.title}</a>
             {volist name="crumbs" id="crumb"}
             <span class="dc-crumb-sep">/</span>
             {if condition="$crumb.id eq $activeId"}

addon/docs/view/frontend/read/notfound.html

@@ -7,7 +7,7 @@
     <h1>{$message}</h1>
     <p>该地址可能已变更或对应内容已下线</p>
     <div class="dc-notfound-ops">
-        <a class="dc-btn dc-btn-primary" href="/docs">返回文档中心</a>
+        <a class="dc-btn dc-btn-primary" href="{$docsBase}">返回文档中心</a>
         <a class="dc-btn" href="/">返回官网首页</a>
     </div>
 </section>

addon/docs/view/frontend/search/index.html

@@ -1,10 +1,12 @@
 {extend name="layout"}
 {block name="title"}{$pageTitle} - {$docsTitle}{/block}
+{* 搜索结果页千变万化，避免被搜索引擎收录 *}
+{block name="robots"}noindex,follow{/block}
 
 {block name="body"}
 <section class="dc-search-page">
-    <form class="dc-search-form" action="/docs/search" method="get">
-        <input type="text" name="kw" value="{$keyword}" placeholder="输入关键词搜索文档..." autocomplete="off" autofocus>
+    <form class="dc-search-form" action="{$docsBase}/search" method="get">
+        <input type="text" name="kw" value="{$keywordEsc}" placeholder="输入关键词搜索文档..." autocomplete="off" autofocus>
         <select name="project_id">
             <option value="0">全部项目</option>
             {volist name="projects" id="p"}
@@ -21,7 +23,7 @@
     </div>
     {else/}
     <div class="dc-search-summary">
-        找到 <b>{$total}</b> 条与「{$keyword}」相关的结果
+        找到 <b>{$total}</b> 条与「{$keywordEsc}」相关的结果
     </div>
 
     {if condition="empty($list)"}
@@ -33,7 +35,7 @@
     <ul class="dc-search-list">
         {volist name="list" id="r"}
         <li>
-            <a class="dc-search-title" href="/docs/{$r.project_name}/{$r.doc_name}">{$r.title}</a>
+            <a class="dc-search-title" href="{$docsBase}/{$r.project_name}/{$r.doc_name}">{$r.title}</a>
             <div class="dc-search-path">{$r.project_title} / {$r.version_name}</div>
             <p class="dc-search-snippet">{$r.snippet}</p>
         </li>