Add automatic database backup with download and restore docs.

Back up futures.db and uploads to /root/qihuo_backup on a daily schedule, expose backup downloads in settings, and document cross-server restore.

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

templates/settings.html

@@ -54,6 +54,19 @@
 .settings-ctp-fold-body{padding:0 1rem .85rem}
 .settings-ctp-fold.is-collapsed .settings-ctp-fold-body{display:none}
 .settings-ctp-status{font-size:.82rem;color:var(--text-muted);margin-top:.75rem;line-height:1.5}
+.settings-backup-table{width:100%;border-collapse:collapse;font-size:.82rem;margin-top:.65rem}
+.settings-backup-table th,.settings-backup-table td{padding:.45rem .5rem;border-bottom:1px solid var(--border);text-align:left}
+.settings-backup-table th{color:var(--text-muted);font-weight:600}
+.settings-backup-restore{
+    margin-top:.85rem;padding:.75rem .85rem;border-radius:8px;
+    border:1px solid var(--border);background:var(--card-inner);
+    font-size:.82rem;color:var(--text-muted);line-height:1.6;
+}
+.settings-backup-restore summary{cursor:pointer;color:var(--text-title);font-weight:600}
+.settings-backup-meta{font-size:.82rem;color:var(--text-muted);line-height:1.55;margin:.35rem 0 .65rem}
+.settings-backup-actions{display:flex;flex-wrap:wrap;align-items:center;gap:.5rem .65rem}
+.settings-backup-download{color:var(--accent);text-decoration:none;font-weight:600}
+.settings-backup-download:hover{text-decoration:underline}
 @media(max-width:900px){
     .settings-password-form{grid-template-columns:1fr}
     .settings-ctp-cards-row{grid-template-columns:1fr}
@@ -293,6 +306,75 @@
     </div>
 </div>
 
+<div class="card">
+    <h2>数据备份与恢复</h2>
+    <p class="settings-backup-meta">
+        自动备份目录：<code>{{ backup_dir }}</code>
+        {% if backup_last_at %} · 上次备份 {{ backup_last_at.replace('T', ' ') }}{% else %} · 尚未备份{% endif %}
+        {% if backup_running %} · <span style="color:var(--accent)">备份进行中…</span>{% endif %}
+    </p>
+    <form action="{{ url_for('settings') }}" method="post" style="margin-bottom:.85rem">
+        <input type="hidden" name="action" value="backup_config">
+        <div class="split-grid" style="margin-bottom:.65rem">
+            <div class="field">
+                <label style="display:flex;align-items:center;gap:.45rem;cursor:pointer">
+                    <input type="checkbox" name="backup_auto_enabled" value="1" {% if backup_auto_enabled %}checked{% endif %}>
+                    <span>启用每日自动备份</span>
+                </label>
+            </div>
+            <div class="field">
+                <label>自动备份时刻（0–23 点）</label>
+                <input name="backup_auto_hour" type="number" min="0" max="23" step="1" value="{{ backup_auto_hour }}">
+            </div>
+            <div class="field">
+                <label>保留最近份数</label>
+                <input name="backup_keep_count" type="number" min="5" max="200" step="1" value="{{ backup_keep_count }}">
+            </div>
+        </div>
+        <button type="submit" class="btn-primary">保存备份策略</button>
+    </form>
+    <div class="settings-backup-actions">
+    <form action="{{ url_for('settings') }}" method="post">
+        <input type="hidden" name="action" value="backup_now">
+        <button type="submit" class="btn-primary" {% if backup_running %}disabled{% endif %}>立即备份</button>
+    </form>
+    </div>
+    <p class="hint" style="margin:.65rem 0 0">备份包含 <code>futures.db</code> 与 <code>uploads/</code>，压缩包可在其他服务器恢复。默认恢复目录 <code>{{ backup_restore_dir }}</code>。</p>
+
+    {% if backup_items %}
+    <table class="settings-backup-table">
+        <thead>
+            <tr><th>文件名</th><th>大小</th><th>时间</th><th></th></tr>
+        </thead>
+        <tbody>
+            {% for item in backup_items %}
+            <tr>
+                <td><code>{{ item.name }}</code></td>
+                <td>{{ item.size_mb }} MB</td>
+                <td>{{ item.mtime.replace('T', ' ') }}</td>
+                <td><a href="{{ url_for('api_backup_download', filename=item.name) }}" class="settings-backup-download">下载</a></td>
+            </tr>
+            {% endfor %}
+        </tbody>
+    </table>
+    {% else %}
+    <p class="hint" style="margin-top:.65rem;margin-bottom:0">暂无备份文件，可点击「立即备份」生成第一份。</p>
+    {% endif %}
+
+    <details class="settings-backup-restore">
+        <summary>备份恢复说明</summary>
+        <ol style="margin:.65rem 0 0 1.1rem;padding:0">
+            <li>下载上方 <code>.tar.gz</code> 到目标服务器（如 <code>/root/</code>）。</li>
+            <li>解压：<code>tar -xzf qihuo_backup_YYYYMMDD_HHMMSS.tar.gz</code></li>
+            <li>进入目录执行：<code>chmod +x restore.sh &amp;&amp; ./restore.sh</code>（默认恢复到 <code>{{ backup_restore_dir }}</code>）。</li>
+            <li>指定目录：<code>RESTORE_DIR=/opt/qihuo ./restore.sh</code></li>
+            <li>在新服务器部署 qihuo 代码与虚拟环境，配置 <code>.env</code> 后 <code>pm2 restart qihuo</code>。</li>
+            <li>恢复前请停止 qihuo，避免覆盖正在使用的数据库。</li>
+        </ol>
+        <p style="margin:.65rem 0 0">完整说明见项目文档 <code>docs/BACKUP.md</code>；压缩包内亦含 <code>RESTORE.md</code>。</p>
+    </details>
+</div>
+
 <div class="split-grid">
     <div class="card">
         <h2>修改密码</h2>