feat(auth): 新增微信聚合登录入口与账号绑定卡\n\n- OAuthButtons.vue: aggregate 启用时渲染微信登录按钮，微信绿 hover + 专属 SVG 图标\n- OAuthBindingCard.vue: 新增微信 aggregate 绑定卡，支持绑定跳转 /api/auth/aggregate 和解绑\n- account/index.vue: hasOAuthProviders 判定加入 aggregate\n- oauth.ts: getProviderDisplayName 中 aggregate 映射为 微信

app/components/Auth/OAuthBindingCard.vue

@@ -117,6 +117,45 @@
         </button>
       </div>
 
+      <!-- 微信 (聚合登录 aggregate) -->
+      <div v-if="config.public.oauth.aggregate" :class="itemClass">
+        <div class="flex items-center gap-4">
+          <div
+            class="w-10 h-10 rounded-xl bg-green-500/10 flex items-center justify-center border border-green-500/20 text-green-500"
+          >
+            <svg viewBox="0 0 24 24" width="22" height="22" fill="currentColor" aria-hidden="true">
+              <path d="M8.69 3.5C5.06 3.5 2.12 6.03 2.12 9.14c0 1.79 1.04 3.37 2.66 4.41l-.68 2.05 2.56-1.28c.52.11 1.06.17 1.61.17h.51c-.08-.36-.11-.73-.08-1.09H8.69c-2.59 0-4.69-1.93-4.69-4.31s2.1-4.31 4.69-4.31h1.37c.25-.98 1.09-1.7 2.09-1.7.43 0 .83.13 1.17.36C12.61 3.06 10.76 3.5 8.69 3.5zM10.4 5.62c-.93 0-1.69.76-1.69 1.69s.76 1.69 1.69 1.69 1.69-.76 1.69-1.69-.76-1.69-1.69-1.69zm7.19.91c-2.13 0-3.86 1.7-3.86 3.8s1.73 3.8 3.86 3.8c.5 0 1.02-.1 1.47-.27L21.5 15l-.67-1.95c1.21-.88 2-2.24 2-3.72 0-2.1-1.73-3.8-3.84-3.8-.1 0-.2 0-.4.01zm-1.84 2.69c-.66 0-1.2.54-1.2 1.2s.54 1.2 1.2 1.2 1.2-.54 1.2-1.2-.54-1.2-1.2-1.2z"/>
+            </svg>
+          </div>
+          <div class="flex flex-col">
+            <span class="text-sm font-bold text-zinc-200">{{
+              getProviderDisplayName('aggregate')
+            }}</span>
+            <span v-if="aggregateIdentity" class="text-[11px] text-blue-500 font-medium mt-0.5">{{
+              aggregateIdentity.providerUsername
+            }}</span>
+            <span v-else class="text-[11px] text-zinc-500 mt-0.5">未绑定</span>
+          </div>
+        </div>
+
+        <button
+          v-if="aggregateIdentity"
+          class="px-4 py-1.5 bg-rose-500/10 border border-rose-500/20 hover:bg-rose-500/20 text-rose-500 text-xs font-black rounded-xl transition-all disabled:opacity-50"
+          :disabled="actionLoading"
+          @click="confirmUnbind('aggregate')"
+        >
+          {{ actionLoading ? '处理中...' : '解绑' }}
+        </button>
+        <button
+          v-else
+          class="px-4 py-1.5 bg-emerald-600 hover:bg-emerald-500 text-white text-xs font-black rounded-xl shadow-lg shadow-emerald-900/20 transition-all active:scale-95 disabled:opacity-50"
+          :disabled="actionLoading"
+          @click="handleBind('aggregate')"
+        >
+          {{ actionLoading ? '跳转中...' : '立即绑定' }}
+        </button>
+      </div>
+
       <!-- WebAuthn / Passkey -->
       <div 
         v-if="isWebAuthnSupported || webauthnIdentities.length > 0 || !isSecureContext"
@@ -350,6 +389,7 @@ const itemClass =
 const githubIdentity = computed(() => identities.value.find((i) => i.provider === 'github'))
 const casdoorIdentity = computed(() => identities.value.find((i) => i.provider === 'casdoor'))
 const googleIdentity = computed(() => identities.value.find((i) => i.provider === 'google'))
+const aggregateIdentity = computed(() => identities.value.find((i) => i.provider === 'aggregate'))
 const webauthnIdentities = computed(() => identities.value.filter((i) => i.provider === 'webauthn'))
 
 const fetchIdentities = async () => {