初始提交：姜十三论坛 Jiang13 Forum

轻量自用论坛，Go 单二进制 + React SPA 内嵌 + SQLite。

Co-authored-by: Cursor <cursoragent@cursor.com>

embed_static/templates/admin/settings.html

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+{{define "admin/settings.html"}}{{template "admin/layout" .}}{{end}}
+{{define "admin_content_settings"}}
+<div class="admin-page-head">
+  <div>
+    <h1>系统设置</h1>
+    <p>数据目录、敏感词配置与数据库备份</p>
+  </div>
+</div>
+
+<div class="row g-3">
+  <div class="col-lg-6">
+    <div class="admin-card">
+      <div class="admin-card-head">运行信息</div>
+      <div class="admin-card-body">
+        <div class="info-row"><div class="info-label">数据目录</div><div class="info-value"><code>{{.DataDir}}</code></div></div>
+        <div class="info-row"><div class="info-label">数据库文件</div><div class="info-value"><code>{{.DBPath}}</code></div></div>
+        <div class="info-row"><div class="info-label">监听端口</div><div class="info-value">{{.Port}}</div></div>
+        <div class="info-row"><div class="info-label">敏感词配置</div><div class="info-value"><code>{{.FilterPath}}</code></div></div>
+        <p class="text-muted small mt-3 mb-0">敏感词文件每行一个词，<code>#</code> 开头为注释，修改后需重启服务生效。</p>
+      </div>
+    </div>
+  </div>
+  <div class="col-lg-6">
+    <div class="admin-card">
+      <div class="admin-card-head">数据库备份</div>
+      <div class="admin-card-body">
+        <p class="text-muted small">将 SQLite 数据库复制到数据目录，生成带时间戳的备份文件。</p>
+        <button class="btn btn-success" id="backupBtn" onclick="doBackup()">一键导出备份</button>
+        <div id="backupResult" class="mt-3"></div>
+      </div>
+    </div>
+  </div>
+</div>
+{{end}}
+
+{{define "admin_scripts_settings"}}
+<script>
+function doBackup() {
+  var btn = document.getElementById('backupBtn');
+  setBtnLoading(btn, true);
+  adminFetch('/admin/api/backup', { method: 'POST' })
+    .then(function(d) {
+      showToast(d.message);
+      var html = '<div class="alert alert-success small mb-0">';
+      html += '<div>备份文件：<code>' + d.filename + '</code></div>';
+      if (d.download) {
+        html += '<a href="' + d.download + '" class="btn btn-sm btn-outline-success mt-2">下载备份文件</a>';
+      }
+      html += '<div class="text-muted mt-2">存储路径：' + d.path + '</div></div>';
+      document.getElementById('backupResult').innerHTML = html;
+    })
+    .catch(function(e) { showToast(e.message, 'danger'); })
+    .finally(function() { setBtnLoading(btn, false); });
+}
+</script>
+{{end}}