特性：增加全站 SMTP 邮件业务开关（smtp_enabled），并根据此开关在登录首页控制是否显示邮箱找回密码的入口

resources/views/admin/smtp/edit.blade.php

@@ -28,7 +28,29 @@
                     @csrf
                     @method('PUT')
 
-                    <div class="space-y-5">
+                    <div class="space-y-6">
+                        <!-- 系统邮件总开关 -->
+                        <div
+                            class="bg-indigo-50/50 p-4 rounded-lg border border-indigo-100 flex items-center justify-between">
+                            <div>
+                                <h4 class="font-bold text-gray-800">全站邮件业务总开关 <span
+                                        class="text-xs font-normal text-gray-500 ml-1">[smtp_enabled]</span></h4>
+                                <p class="text-sm text-gray-500 mt-1">控制前台是否开启“通过邮箱找回密码”等依赖邮件系统的入口功能。</p>
+                            </div>
+                            <label class="relative inline-flex items-center cursor-pointer">
+                                <!-- 隐藏的 input 用来确保未勾选时提交 0 -->
+                                <input type="hidden" name="smtp_enabled" value="0">
+                                <input type="checkbox" name="smtp_enabled" value="1" class="sr-only peer"
+                                    {{ ($params['smtp_enabled'] ?? '0') === '1' ? 'checked' : '' }}>
+                                <div
+                                    class="w-11 h-6 bg-gray-200 peer-focus:outline-none rounded-full peer peer-checked:after:translate-x-full peer-checked:after:border-white after:content-[''] after:absolute after:top-[2px] after:left-[2px] after:bg-white after:border-gray-300 after:border after:rounded-full after:h-5 after:w-5 after:transition-all peer-checked:bg-indigo-600">
+                                </div>
+                            </label>
+                        </div>
+
+                        <!-- 华丽分割线 -->
+                        <div class="border-t border-gray-100 pt-3"></div>
+
                         <div class="grid grid-cols-1 md:grid-cols-2 gap-5">
                             <div>
                                 <label class="block text-sm font-bold text-gray-700 mb-1">
@@ -98,7 +120,8 @@
                                     SSL加密 (推荐)</option>
                                 <option value="tls" {{ ($params['smtp_encryption'] ?? '') === 'tls' ? 'selected' : '' }}>
                                     TLS加密</option>
-                                <option value="" {{ ($params['smtp_encryption'] ?? '') === '' ? 'selected' : '' }}>无加密
+                                <option value="" {{ ($params['smtp_encryption'] ?? '') === '' ? 'selected' : '' }}>
+                                    无加密
                                 </option>
                             </select>
                         </div>

resources/views/index.blade.php

@@ -363,7 +363,15 @@
                         <button type="reset" class="btn">重填</button>
                     </div>
 
-                    <div class="link-row">第一次登录即为注册，请记住您的密码</div>
+                    <div class="link-row">
+                        第一次登录即为注册，请记住您的密码
+                        @if (\App\Models\SysParam::where('alias', 'smtp_enabled')->value('body') === '1')
+                            <div style="margin-top: 8px;">
+                                <a href="javascript:alert('邮箱找回密码业务即将上线...');"
+                                    style="color: #336699; text-decoration: none;">忘了密码？点击通过邮箱找回</a>
+                            </div>
+                        @endif
+                    </div>
                 </div>
 
                 {{-- 右侧：房间列表 --}}