完善桌面端界面、发布检查与邮箱域名同步

frontend/src/views/Login.vue

@@ -159,22 +159,14 @@
                 <span class="email-at-sign">@</span>
                 <div class="email-domain-wrapper">
                   <select
-                    v-if="showDomainSelect"
                     v-model="form.emailDomain"
                     class="email-domain-field"
                     aria-label="邮箱域名"
+                    :disabled="availableEmailDomains.length === 0"
                   >
                     <option v-for="domain in availableEmailDomains" :key="domain" :value="domain">{{ domain }}</option>
                   </select>
-                  <input
-                    v-else
-                    v-model.trim="form.emailDomain"
-                    type="text"
-                    class="email-domain-field email-domain-input"
-                    placeholder="邮箱域名"
-                    aria-label="邮箱域名"
-                  />
-                  <svg v-if="showDomainSelect" class="email-domain-chevron" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5"><path d="m6 9 6 6 6-6"/></svg>
+                  <svg class="email-domain-chevron" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2.5"><path d="m6 9 6 6 6-6"/></svg>
                 </div>
               </div>
             </el-form-item>
@@ -201,12 +193,9 @@
               <span>登 录</span>
             </el-button>
 
-            <!-- 注册与忘记密码（左右分立） -->
+            <!-- 忘记密码与注册 -->
             <div class="forgot-register-row">
               <RouterLink to="/forgot-password" class="forgot-link">忘记密码？</RouterLink>
-              <RouterLink v-if="showDesktopServerSettings" to="/desktop/server-settings" class="server-settings-link">
-                服务器设置
-              </RouterLink>
               <RouterLink to="/register" class="register-link">新用户注册</RouterLink>
             </div>
           </el-form>
@@ -282,7 +271,6 @@ const AGREE_PROTOCOL_KEY = "ctms_agree_protocol";
 const formRef = ref<FormInstance>();
 const form = reactive({ email: "", emailLocal: "", emailDomain: "", password: "", agreeProtocol: false });
 const configuredEmailDomains = ref<string[]>([]);
-const preservedEmailDomain = ref("");
 
 const rules: FormRules<typeof form> = {
   email: [
@@ -305,13 +293,7 @@ const refreshDesktopServerUrl = () => {
 };
 
 const normalizeDomain = (value: string) => value.trim().toLowerCase().replace(/^@/, "");
-const availableEmailDomains = computed(() => Array.from(new Set([
-  ...configuredEmailDomains.value,
-  preservedEmailDomain.value,
-].filter(Boolean))));
-const showDomainSelect = computed(
-  () => configuredEmailDomains.value.length > 0 || Boolean(preservedEmailDomain.value)
-);
+const availableEmailDomains = computed(() => configuredEmailDomains.value);
 
 const syncEmailFromParts = () => {
   const local = form.emailLocal.trim().toLowerCase();
@@ -325,14 +307,13 @@ const applyEmailValue = (email: string) => {
   const separator = normalized.lastIndexOf("@");
   if (separator > 0) {
     form.emailLocal = normalized.slice(0, separator);
-    form.emailDomain = normalizeDomain(normalized.slice(separator + 1));
-    preservedEmailDomain.value = configuredEmailDomains.value.includes(form.emailDomain)
-      ? ""
-      : form.emailDomain;
+    const domain = normalizeDomain(normalized.slice(separator + 1));
+    form.emailDomain = configuredEmailDomains.value.includes(domain)
+      ? domain
+      : configuredEmailDomains.value[0] || "";
   } else {
     form.emailLocal = normalized;
     form.emailDomain = configuredEmailDomains.value[0] || "";
-    preservedEmailDomain.value = "";
   }
   syncEmailFromParts();
 };
@@ -343,8 +324,12 @@ const loadEmailDomains = async () => {
     configuredEmailDomains.value = Array.from(new Set(
       data.items.map(normalizeDomain).filter(Boolean)
     ));
+    if (!configuredEmailDomains.value.includes(form.emailDomain)) {
+      form.emailDomain = configuredEmailDomains.value[0] || "";
+    }
   } catch {
     configuredEmailDomains.value = [];
+    form.emailDomain = "";
   }
 };
 
@@ -980,8 +965,7 @@ const onSubmit = async () => {
   padding: 6px 0;
 }
 
-.email-local-field::placeholder,
-.email-domain-input::placeholder {
+.email-local-field::placeholder {
   color: #94a3b8;
 }
 
@@ -1013,10 +997,9 @@ const onSubmit = async () => {
   cursor: pointer;
 }
 
-.email-domain-input {
-  width: 150px;
-  padding-right: 4px;
-  cursor: text;
+.email-domain-field:disabled {
+  color: #94a3b8;
+  cursor: not-allowed;
 }
 
 .email-domain-chevron {
@@ -1101,7 +1084,7 @@ const onSubmit = async () => {
   margin-top: 20px;
 }
 
-.forgot-link, .register-link, .server-settings-link {
+.forgot-link, .register-link {
   font-size: 13px;
   color: #2563eb;
   text-decoration: none;
@@ -1109,7 +1092,7 @@ const onSubmit = async () => {
   transition: color 0.15s;
 }
 
-.forgot-link:hover, .register-link:hover, .server-settings-link:hover {
+.forgot-link:hover, .register-link:hover {
   color: #1d4ed8;
   text-decoration: underline;
 }