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/articles/view/member/article/edit.html

@@ -0,0 +1,92 @@
+<div class="layui-card">
+  <div class="layui-card-header">
+    {if $article}编辑稿件{else/}写文章{/if}
+    <a href="{:url('articles/member/article/index')}" class="layui-btn layui-btn-sm layui-btn-primary" style="float:right;margin-top:6px;">返回列表</a>
+  </div>
+  <div class="layui-card-body">
+    <form class="layui-form" lay-filter="contribute">
+      <input type="hidden" name="id" value="{$article.id|default='0'}">
+
+      <div class="layui-form-item">
+        <label class="layui-form-label">标题</label>
+        <div class="layui-input-block">
+          <input type="text" name="title" value="{$article.title|default=''}" required lay-verify="required" placeholder="文章标题" class="layui-input">
+        </div>
+      </div>
+
+      <div class="layui-form-item">
+        <label class="layui-form-label">分类</label>
+        <div class="layui-input-block">
+          <select name="cid" lay-verify="required">
+            {volist name='categories' id='c'}
+            <option value="{$c.id}" {if isset($article['cid']) && $article['cid'] == $c['id']}selected{/if}>{$c.name}</option>
+            {/volist}
+          </select>
+        </div>
+      </div>
+
+      <div class="layui-form-item">
+        <label class="layui-form-label">摘要</label>
+        <div class="layui-input-block">
+          <textarea name="summary" class="layui-textarea" placeholder="可选，列表页展示">{$article.summary|default=''}</textarea>
+        </div>
+      </div>
+
+      <div class="layui-form-item">
+        <label class="layui-form-label">封面图</label>
+        <div class="layui-input-block">
+          <input type="text" name="cover_image" value="{$article.cover_image|default=''}" class="layui-input" placeholder="图片地址（可留空）">
+        </div>
+      </div>
+
+      <div class="layui-form-item">
+        <label class="layui-form-label">正文</label>
+        <div class="layui-input-block">
+          <textarea id="content" name="content" style="display:none;">{$article.content|default=''}</textarea>
+          <script id="editor" type="text/plain" style="width:100%;height:380px;"></script>
+        </div>
+      </div>
+
+      <div class="layui-form-item">
+        <div class="layui-input-block">
+          <button class="layui-btn" lay-submit lay-filter="contribute">提交投稿</button>
+          <span style="color:#999;margin-left:10px;">提交后进入「待审核」，管理员通过后才会公开显示</span>
+        </div>
+      </div>
+    </form>
+  </div>
+</div>
+
+<script src="/assets/library/ueditor/ueditor.config.js"></script>
+<script src="/assets/library/ueditor/ueditor.all.js"></script>
+<script>
+layui.use(['form', 'jquery'], function () {
+  var form = layui.form, $ = layui.jquery;
+
+  var ue = UE.getEditor('editor', {
+    UEDITOR_HOME_URL: '/assets/library/ueditor/',
+    serverUrl: '/ueditor'
+  });
+  ue.ready(function () {
+    var c = $('#content').val();
+    if (c) { ue.setContent(c); }
+  });
+
+  form.on('submit(contribute)', function (data) {
+    data.field.content = ue.getContent();
+    $.ajax({
+      url: "{:url('articles/member/article/save')}",
+      type: 'post',
+      data: data.field,
+      dataType: 'json',
+      success: function (r) {
+        layer.msg(r.message || r.msg || '');
+        if (r.code === 0 || r.code === '0') {
+          setTimeout(function () { location.href = "{:url('articles/member/article/index')}"; }, 800);
+        }
+      }
+    });
+    return false;
+  });
+});
+</script>

addon/articles/view/member/article/index.html

@@ -0,0 +1,54 @@
+<div class="layui-card">
+  <div class="layui-card-header">
+    我的投稿
+    <a href="{:url('articles/member/article/add')}" class="layui-btn layui-btn-sm layui-btn-normal" style="float:right;margin-top:6px;">写文章</a>
+  </div>
+  <div class="layui-card-body">
+    <table class="layui-table">
+      <thead>
+        <tr><th>ID</th><th>标题</th><th>分类</th><th>状态</th><th>浏览</th><th>时间</th><th>操作</th></tr>
+      </thead>
+      <tbody>
+        {volist name='list' id='a'}
+        <tr>
+          <td>{$a.id}</td>
+          <td>{$a.title}</td>
+          <td>{$a.category_name|default='未分类'}</td>
+          <td>
+            {switch $a.status}
+              {case 1}<span class="layui-badge layui-bg-green">已发布</span>{/case}
+              {case 2}<span class="layui-badge layui-bg-orange">待审核</span>{/case}
+              {default /}<span class="layui-badge">草稿</span>
+            {/switch}
+          </td>
+          <td>{$a.view_count}</td>
+          <td>{$a.create_at}</td>
+          <td>
+            <a href="{:url('articles/member/article/edit', ['id'=>$a.id])}" class="layui-btn layui-btn-xs">编辑</a>
+            <a href="javascript:;" class="layui-btn layui-btn-xs layui-btn-danger btn-del" data-id="{$a.id}">删除</a>
+          </td>
+        </tr>
+        {/volist}
+        {empty name='list'}
+        <tr><td colspan="7" style="text-align:center;color:#999;">还没有投稿，点右上角「写文章」开始吧</td></tr>
+        {/empty}
+      </tbody>
+    </table>
+    <div>{$list->render()|raw}</div>
+  </div>
+</div>
+
+<script>
+layui.use(['jquery', 'layer'], function () {
+  var $ = layui.jquery, layer = layui.layer;
+  $('.btn-del').on('click', function () {
+    var id = $(this).data('id');
+    layer.confirm('确认删除这篇稿件？', function () {
+      $.post("{:url('articles/member/article/delete')}", { id: id }, function (r) {
+        layer.msg(r.message || r.msg || '');
+        if (r.code === 0 || r.code === '0') { setTimeout(function () { location.reload(); }, 600); }
+      });
+    });
+  });
+});
+</script>