fix(provider): support unversioned API roots in model fetch

frontend/src/features/providers/components/EndpointFormDialog.vue

@@ -153,7 +153,7 @@
                     <Label class="text-xs text-muted-foreground">自定义路径</Label>
                     <Input
                       :model-value="getDisplayedPath(endpoint)"
-                      :placeholder="getDefaultPath(endpoint.api_format, endpoint.base_url) || '留空使用默认'"
+                      :placeholder="getDefaultPath(endpoint.api_format, getEndpointEditState(endpoint.id)?.url ?? endpoint.base_url) || '留空使用默认'"
                       :disabled="isFixedProvider"
                       @update:model-value="(v) => updateEndpointField(endpoint.id, 'path', v)"
                     />

frontend/src/features/providers/components/KeyAllowedModelsDialog.vue

@@ -212,7 +212,7 @@ const emit = defineEmits<{
   saved: []
 }>()
 
-const { success, error: showError } = useToast()
+const { success, error: showError, warning: showWarning } = useToast()
 const { fetchModels: fetchCachedModels } = useUpstreamModelsCache()
 
 const isOpen = computed(() => props.open)
@@ -297,7 +297,7 @@ async function fetchUpstreamModels() {
       hasQueried.value = true
       // 如果有部分失败，显示警告提示
       if (result.error) {
-        showError(`部分格式获取失败: ${result.error}`, '警告')
+        showWarning(result.error, '部分格式获取失败')
       }
     } else if (result.error) {
       errorMessage.value = result.error

frontend/src/features/providers/components/KeyAllowedModelsEditDialog.vue

@@ -395,7 +395,7 @@ const emit = defineEmits<{
   saved: []
 }>()
 
-const { success, error: showError } = useToast()
+const { success, error: showError, warning: showWarning } = useToast()
 const { confirmWarning } = useConfirm()
 const { fetchModels: fetchCachedModels } = useUpstreamModelsCache()
 
@@ -691,6 +691,9 @@ async function fetchUpstreamModels(forceRefresh = false) {
       // 获取上游模型后，从自定义模型列表中移除已变成已知的模型
       const upstreamIds = new Set(result.models.map((m: UpstreamModel) => m.id))
       allCustomModels.value = allCustomModels.value.filter(m => !upstreamIds.has(m))
+      if (result.error) {
+        showWarning(result.error, '部分格式获取失败')
+      }
     } else if (result.error) {
       showError(result.error, '获取上游模型失败')
     }

frontend/src/features/providers/components/ModelMappingDialog.vue

@@ -322,7 +322,7 @@ const emit = defineEmits<{
   'saved': []
 }>()
 
-const { error: showError, success: showSuccess } = useToast()
+const { error: showError, success: showSuccess, warning: showWarning } = useToast()
 const { fetchModels: fetchCachedModels } = useUpstreamModelsCache()
 
 type EndpointOption = {
@@ -565,7 +565,11 @@ async function fetchUpstreamModels() {
       allCustomNames.value = Array.from(mergedCustom).filter(name => !upstreamIds.has(name))
     }
     if (result.error) {
-      showError(result.error, '获取上游模型失败')
+      if (result.models.length > 0) {
+        showWarning(result.error, '部分格式获取失败')
+      } else {
+        showError(result.error, '获取上游模型失败')
+      }
     }
   } catch (err: unknown) {
     showError(parseApiError(err, '获取上游模型列表失败'), '错误')

frontend/src/features/providers/components/__tests__/endpoint-default-paths.spec.ts

@@ -3,9 +3,11 @@ import { describe, expect, it } from 'vitest'
 import { getDefaultEndpointPath } from '../endpoint-default-paths'
 
 const apiFormats = [
+  { value: 'openai:chat', default_path: '/v1/chat/completions' },
   { value: 'gemini:generate_content', default_path: '/v1beta/models/{model}:{action}' },
   { value: 'gemini:embedding', default_path: '/v1beta/models/{model}:{action}' },
   { value: 'openai:responses', default_path: '/v1/responses' },
+  { value: 'openai:embedding', default_path: '/v1/embeddings' },
 ]
 
 describe('endpoint default paths', () => {
@@ -44,4 +46,20 @@ describe('endpoint default paths', () => {
       apiFormats,
     })).toBe('/responses')
   })
+
+  it('drops /v1 from OpenAI-compatible defaults when base URL ends with /api', () => {
+    expect(getDefaultEndpointPath({
+      apiFormat: 'openai:chat',
+      providerType: 'custom',
+      baseUrl: 'https://proxy.example.com/api',
+      apiFormats,
+    })).toBe('/chat/completions')
+
+    expect(getDefaultEndpointPath({
+      apiFormat: 'openai:embedding',
+      providerType: 'custom',
+      baseUrl: 'https://proxy.example.com/api?tenant=demo',
+      apiFormats,
+    })).toBe('/embeddings')
+  })
 })

frontend/src/features/providers/components/endpoint-default-paths.ts

@@ -15,6 +15,25 @@ function isCodexUrl(baseUrl: string): boolean {
   return url.includes('/backend-api/codex') || url.endsWith('/codex')
 }
 
+function baseUrlEndsWithApiRoot(baseUrl?: string | null): boolean {
+  const raw = (baseUrl || '').trim()
+  if (!raw) return false
+  try {
+    const parsed = new URL(raw)
+    return parsed.pathname.replace(/\/+$/, '').toLowerCase().endsWith('/api')
+  } catch {
+    return raw.split('?')[0].replace(/\/+$/, '').toLowerCase().endsWith('/api')
+  }
+}
+
+function stripV1PrefixForApiRoot(path: string): string {
+  return path.replace(/^\/v1(?=\/)/i, '')
+}
+
+function isOpenAiCompatibleFormat(apiFormat: string): boolean {
+  return apiFormat.startsWith('openai:') || apiFormat.startsWith('jina:')
+}
+
 export function getDefaultEndpointPath(params: {
   apiFormat: string
   providerType?: string | null
@@ -43,5 +62,8 @@ export function getDefaultEndpointPath(params: {
   if (normalizedApiFormat === 'openai:responses' && isCodex) {
     return '/responses'
   }
+  if (baseUrlEndsWithApiRoot(params.baseUrl) && isOpenAiCompatibleFormat(normalizedApiFormat)) {
+    return stripV1PrefixForApiRoot(defaultPath)
+  }
   return defaultPath
 }