fix: clarify ark agent plan model discovery

web/src/app/(admin)/admin/settings/page.tsx

@@ -215,6 +215,10 @@ export default function AdminSettingsPage() {
             const channelModels = await fetchChannelModels(token, { index: editingChannelIndex ?? undefined, channel: normalizeChannel(channel) });
             const current = isModelSelectorOpen ? uniqueModels(modelSelectSelected) : uniqueModels(channelForm.getFieldValue("models") || []);
             rememberModels(channelModels);
+            if (!channelModels.length) {
+                message.warning("上游未返回模型列表，请手动输入模型名称");
+                return;
+            }
             setModelSelectExisting(current);
             setModelSelectSource(uniqueModels(channelModels));
             setModelSelectSelected(uniqueModels([...current, ...channelModels]));
@@ -707,6 +711,7 @@ export default function AdminSettingsPage() {
                                 </Button>
                             </Space.Compact>
                         </Flex>
+                        <Typography.Text type="secondary">如果上游不提供 OpenAI /models 模型列表接口，请在这里手动增加模型名称。</Typography.Text>
                         <Tabs
                             activeKey={modelSelectTab}
                             onChange={(key) => setModelSelectTab(key as ModelSelectTabKey)}
@@ -765,7 +770,7 @@ export default function AdminSettingsPage() {
                     destroyOnHidden
                 >
                     <Flex vertical gap={12}>
-                        <Typography.Text type="secondary">测试会向选中模型发送一条 hi，用于确认渠道是否有响应。</Typography.Text>
+                        <Typography.Text type="secondary">普通文本模型会发送一条 hi；Agent Plan / Seedance 视频模型只做配置格式检查，不会发起视频生成，也不代表模型权限已验证。</Typography.Text>
                         <Input.Search placeholder="搜索模型..." allowClear value={testKeyword} onChange={(event) => setTestKeyword(event.target.value)} />
                         <Table
                             rowKey="model"

web/src/stores/use-config-store.ts

@@ -126,8 +126,26 @@ export function useEffectiveConfig() {
 
 export function buildApiUrl(baseUrl: string, path: string) {
     let normalizedBaseUrl = baseUrl.trim().replace(/\/+$/, "");
-    const arkPlanIndex = normalizedBaseUrl.toLowerCase().indexOf("/api/plan/v3");
-    if (arkPlanIndex >= 0) normalizedBaseUrl = normalizedBaseUrl.slice(0, arkPlanIndex + "/api/plan/v3".length);
-    const apiBaseUrl = normalizedBaseUrl.endsWith("/v1") || normalizedBaseUrl.endsWith("/api/v3") || normalizedBaseUrl.endsWith("/api/plan/v3") ? normalizedBaseUrl : `${normalizedBaseUrl}/v1`;
+    normalizedBaseUrl = normalizeArkPlanBaseUrl(normalizedBaseUrl);
+    const lowerBaseUrl = normalizedBaseUrl.toLowerCase();
+    const apiBaseUrl = lowerBaseUrl.endsWith("/v1") || lowerBaseUrl.endsWith("/api/v3") || lowerBaseUrl.endsWith("/api/plan/v3") ? normalizedBaseUrl : `${normalizedBaseUrl}/v1`;
     return `${apiBaseUrl}${path}`;
 }
+
+function normalizeArkPlanBaseUrl(baseUrl: string) {
+    try {
+        const url = new URL(baseUrl);
+        const path = url.pathname.replace(/\/+$/, "");
+        const lowerPath = path.toLowerCase();
+        const arkPlanIndex = lowerPath.indexOf("/api/plan/v3");
+        if (arkPlanIndex < 0) return baseUrl;
+        const end = arkPlanIndex + "/api/plan/v3".length;
+        if (lowerPath.length !== end && lowerPath[end] !== "/") return baseUrl;
+        url.pathname = path.slice(0, end);
+        url.search = "";
+        url.hash = "";
+        return url.toString().replace(/\/+$/, "");
+    } catch {
+        return baseUrl;
+    }
+}