feat: add embedding and rerank support

frontend/src/features/providers/components/provider-tabs/ModelMappingTab.vue

@@ -700,7 +700,7 @@ function runMappingTest(testingKey: string, modelName: string) {
   selectedTestEndpoint.value = activeEndpoints.value[0] ?? null
   testRequestHeadersResetValue.value = buildDefaultModelTestRequestHeaders()
   testRequestHeadersDraft.value = testRequestHeadersResetValue.value
-  testRequestBodyResetValue.value = buildDefaultModelTestRequestBody(modelName)
+  testRequestBodyResetValue.value = buildDefaultModelTestRequestBody(modelName, selectedTestEndpoint.value?.api_format)
   testRequestBodyDraft.value = testRequestBodyResetValue.value
 }
 

frontend/src/features/providers/components/provider-tabs/ModelsTab.vue

@@ -543,6 +543,7 @@ async function testModelConnection(model: Model) {
   testRequestHeadersDraft.value = testRequestHeadersResetValue.value
   testRequestBodyResetValue.value = buildDefaultModelTestRequestBody(
     model.global_model_name || model.provider_model_name,
+    selectedTestEndpoint.value?.api_format,
   )
   testRequestBodyDraft.value = testRequestBodyResetValue.value
   modelTest.testResult.value = null

frontend/src/features/providers/components/provider-tabs/__tests__/model-test-request.spec.ts

@@ -0,0 +1,46 @@
+import { describe, expect, it } from 'vitest'
+
+import { buildDefaultModelTestRequestBody } from '../model-test-request'
+
+describe('buildDefaultModelTestRequestBody', () => {
+  it.each([
+    'openai:embedding',
+    'gemini:embedding',
+    'jina:embedding',
+    'doubao:embedding',
+    '  OPENAI:EMBEDDING  ',
+  ])('uses embedding input payloads for %s api formats', (apiFormat) => {
+    const body = JSON.parse(buildDefaultModelTestRequestBody('text-embedding-3-small', apiFormat))
+
+    expect(body).toEqual({
+      model: 'text-embedding-3-small',
+      input: 'This is a test embedding input.',
+    })
+    expect(body.messages).toBeUndefined()
+    expect(body.stream).toBeUndefined()
+  })
+
+  it.each([
+    'openai:rerank',
+    'jina:rerank',
+    '  JINA:RERANK  ',
+  ])('uses rerank query/documents payloads for %s api formats', (apiFormat) => {
+    const body = JSON.parse(buildDefaultModelTestRequestBody('bge-reranker-base', apiFormat))
+
+    expect(body.model).toBe('bge-reranker-base')
+    expect(body.query).toBe('This is a test rerank query.')
+    expect(body.documents).toHaveLength(2)
+    expect(body.top_n).toBe(1)
+    expect(body.return_documents).toBe(true)
+    expect(body.messages).toBeUndefined()
+    expect(body.stream).toBeUndefined()
+  })
+
+  it('keeps chat payloads for chat api formats', () => {
+    const body = JSON.parse(buildDefaultModelTestRequestBody('gpt-5.1', 'openai:chat'))
+
+    expect(body.messages).toEqual([{ role: 'user', content: 'Hello! This is a test message.' }])
+    expect(body.stream).toBe(true)
+    expect(body.input).toBeUndefined()
+  })
+})

frontend/src/features/providers/components/provider-tabs/model-test-request.ts

@@ -4,7 +4,27 @@ const DEFAULT_MODEL_TEST_MESSAGE = 'Hello! This is a test message.'
 export const POOL_TEST_CONCURRENCY = 5
 export const SINGLE_TEST_CONCURRENCY = 1
 
-export function buildDefaultModelTestRequestBody(modelName: string): string {
+export function buildDefaultModelTestRequestBody(modelName: string, apiFormat?: string | null): string {
+  if (apiFormat?.trim().toLowerCase().endsWith(':embedding')) {
+    return JSON.stringify({
+      model: modelName,
+      input: 'This is a test embedding input.',
+    }, null, 2)
+  }
+
+  if (apiFormat?.trim().toLowerCase().endsWith(':rerank')) {
+    return JSON.stringify({
+      model: modelName,
+      query: 'This is a test rerank query.',
+      documents: [
+        'This document is relevant to the test query.',
+        'This document is unrelated.',
+      ],
+      top_n: 1,
+      return_documents: true,
+    }, null, 2)
+  }
+
   return JSON.stringify({
     model: modelName,
     messages: [