feat: 密码强度多级校验 — low/medium/high/very_high

- site_settings 新增 password.strength 配置项
- 四级：low(len>=8) / medium(两类) / high(三类+无连续) / very_high(四类+无连续)
- 连续字符检查：重复/升序/降序/键盘水平/键盘垂直序列
- 注册和改密接口统一读取配置
- 前端 register.js 动态校验 + 管理后台安全设置区

templates/admin/html/site-settings/index.html

@@ -165,6 +165,28 @@
             </div>
         </div>
 
+        <!-- 安全设置 -->
+        <div class="settings-section">
+            <div class="section-title">安全设置</div>
+            <div class="section-body">
+                <div class="setting-item">
+                    <div class="setting-info">
+                        <span class="setting-label">密码强度</span>
+                        <span class="setting-desc">注册和修改密码时的最低强度要求</span>
+                    </div>
+                    <div class="setting-input-wrap">
+                        <select id="setting-password-strength" class="setting-select" data-key="password.strength">
+                            <option value="low">低 — 仅要求 8 位</option>
+                            <option value="medium" selected>中 — 字母+数字/符号（两类）</option>
+                            <option value="high">高 — 大小写+数字+符号（至少三类）+ 禁止连续字符</option>
+                            <option value="very_high">极高 — 四类全有 + 禁止连续字符</option>
+                        </select>
+                        <button class="btn btn-sm btn-primary btn-save-select" data-key="password.strength" data-input="setting-password-strength">保存</button>
+                    </div>
+                </div>
+            </div>
+        </div>
+
         <!-- 注册设置 -->
         <div class="settings-section">
             <div class="section-title">注册设置</div>

templates/admin/static/js/site-settings.js

@@ -9,6 +9,8 @@
     const TOGGLE_KEYS = [
         { id: 'maintenance-enabled', key: 'maintenance.enabled' },
         { id: 'registration-enabled', key: 'registration.enabled' },
+        { id: 'registration-show-guidelines', key: 'registration.show_guidelines' },
+        { id: 'registration-force-guidelines', key: 'registration.force_guidelines' },
         { id: 'audit-enabled', key: 'audit.enabled' },
         { id: 'audit-username', key: 'audit.username_audit' },
         { id: 'audit-avatar', key: 'audit.avatar_audit' },
@@ -18,9 +20,15 @@
     // 已有专属 UI 的设置 key，不在"其他设置"中重复显示
     var DEDICATED_KEYS = {
         'site.framework': true, 'site.copyright_start': true,
+        'site.name': true, 'site.tagline': true, 'site.contact_email': true,
+        'site.operator_name': true, 'site.icp_number': true, 'site.icp_license': true,
+        'site.police_number': true, 'site.wenwangwen': true, 'site.algorithm_filing': true,
+        'site.privacy_url': true, 'site.terms_url': true,
         'site.guidelines': true,
         'maintenance.enabled': true,
-        'registration.enabled': true,
+        'registration.enabled': true, 'registration.show_guidelines': true,
+        'registration.force_guidelines': true, 'registration.guidelines_timer': true,
+        'password.strength': true,
         'audit.enabled': true, 'audit.username_audit': true, 'audit.avatar_audit': true, 'audit.bio_audit': true
     };
 
@@ -73,8 +81,7 @@
 
     // --- 文本输入保存 ---
     function bindSaveButtons() {
-        var buttons = document.querySelectorAll('.btn-save');
-        buttons.forEach(function(btn) {
+        document.querySelectorAll('.btn-save, .btn-save-select').forEach(function(btn) {
             btn.addEventListener('click', function() {
                 var key = btn.getAttribute('data-key');
                 var inputId = btn.getAttribute('data-input');