feat(seller): 微信区上号方式与账号密码互斥，自动固定为扫码

frontend/src/features/seller/composables/usePublishForm.ts

@@ -89,6 +89,29 @@ export function usePublishForm(options: UsePublishFormOptions) {
     screenshotFiles,
     selectedSkins,
   })
+
+  // ========== 上号方式互斥 ==========
+  // 微信区账号只能扫码登录：选择微信区后，「账号密码」不可选，默认固定为「扫码」。
+  const scanOnlyServers = ['微信']
+  const scanLoginMethod = '扫码'
+  const passwordLoginMethod = '账号密码'
+
+  const isScanOnlyServer = computed(() => scanOnlyServers.includes(form.server_region))
+
+  const effectiveLoginMethodOptions = computed(() => {
+    if (!isScanOnlyServer.value) return pricing.loginMethodOptions.value
+    return pricing.loginMethodOptions.value.filter(option => option !== passwordLoginMethod)
+  })
+
+  watch(
+    () => form.server_region,
+    server => {
+      if (!scanOnlyServers.includes(server)) return
+      if (form.login_method !== scanLoginMethod) {
+        form.login_method = scanLoginMethod
+      }
+    }
+  )
   const uploadedScreenshotCount = computed(
     () => pricing.screenshotSlots.value.filter(item => getScreenshotCount(item.key) > 0).length
   )
@@ -885,6 +908,8 @@ export function usePublishForm(options: UsePublishFormOptions) {
     passwordAndDeviceConfirmed,
     canPublishAfterAgreements,
     showBanRecordRiskHint,
+    isScanOnlyServer,
+    effectiveLoginMethodOptions,
     fileInput,
     activeUploadKey,
     form,

frontend/src/features/seller/views/MobileSellerListingCreateView.vue

@@ -38,7 +38,8 @@ const {
   rankOptions,
   insuranceOptions,
   levelOptions,
-  loginMethodOptions,
+  effectiveLoginMethodOptions,
+  isScanOnlyServer,
   regionOptions,
   banRecordOptions,
   skinGroups,
@@ -383,7 +384,7 @@ const screenshotGuides: Record<string, string> = {
           <template #input>
             <div class="radio-group">
               <button
-                v-for="opt in loginMethodOptions"
+                v-for="opt in effectiveLoginMethodOptions"
                 :key="opt"
                 type="button"
                 class="radio-btn"
@@ -396,7 +397,11 @@ const screenshotGuides: Record<string, string> = {
           </template>
         </van-field>
         <p class="field-hint">
-          优先推荐【账密登录】，出售速度约为扫码的数倍，两种方式安全性一致，账密登录更便捷，请自行衡量
+          {{
+            isScanOnlyServer
+              ? '微信账号仅支持扫码登录，上号方式固定为扫码。'
+              : '优先推荐【账密登录】，出售速度约为扫码的数倍，两种方式安全性一致，账密登录更便捷，请自行衡量'
+          }}
         </p>
 
         <van-field label="解锁赛伊德" required class="publish-field">

frontend/src/features/seller/views/SellerListingCreateView.vue

@@ -43,7 +43,8 @@ const {
   rankOptions,
   insuranceOptions,
   levelOptions,
-  loginMethodOptions,
+  effectiveLoginMethodOptions,
+  isScanOnlyServer,
   regionOptions,
   banRecordOptions,
   skinGroups,
@@ -322,12 +323,16 @@ function selectDailyLoss(value: string | number) {
           <div class="field-row login-method-row">
             <label>上号方式</label>
             <OptionChips
-              :options="loginMethodOptions"
+              :options="effectiveLoginMethodOptions"
               :model-value="form.login_method"
               @select="form.login_method = String($event)"
             />
             <p class="field-hint">
-              优先推荐账密登录，出售速度通常更快；请结合账号安全情况自行选择。
+              {{
+                isScanOnlyServer
+                  ? '微信账号仅支持扫码登录，上号方式固定为扫码。'
+                  : '优先推荐账密登录，出售速度通常更快；请结合账号安全情况自行选择。'
+              }}
             </p>
           </div>