diff --git a/src/server/api/providers.ts b/src/server/api/providers.ts
index 82247cc4..cdbc673b 100644
--- a/src/server/api/providers.ts
+++ b/src/server/api/providers.ts
@@ -1,30 +1,29 @@
 /**
  * Providers REST API
  *
- * GET    /api/providers            — 列出所有 provider
- * GET    /api/providers/:id        — 获取单个 provider
- * POST   /api/providers            — 添加 provider
- * PUT    /api/providers/:id        — 更新 provider
- * DELETE /api/providers/:id        — 删除 provider
- * POST   /api/providers/:id/activate — 激活 provider
- * POST   /api/providers/:id/test   — 测试已保存 provider
- * POST   /api/providers/test       — 测试未保存的配置
+ * GET    /api/providers              — list all saved providers + activeId
+ * GET    /api/providers/presets       — list available presets
+ * POST   /api/providers              — add a provider
+ * PUT    /api/providers/:id          — update a provider
+ * DELETE /api/providers/:id          — delete a provider
+ * POST   /api/providers/:id/activate — activate a saved provider
+ * POST   /api/providers/official     — activate official (clear env)
+ * POST   /api/providers/:id/test     — test a saved provider
+ * POST   /api/providers/test         — test unsaved config
  */
 
 import { z } from 'zod'
 import { ProviderService } from '../services/providerService.js'
+import { PROVIDER_PRESETS } from '../config/providerPresets.js'
 import {
   CreateProviderSchema,
   UpdateProviderSchema,
   TestProviderSchema,
-  ActivateProviderSchema,
 } from '../types/provider.js'
 import { ApiError, errorResponse } from '../middleware/errorHandler.js'
 
 const providerService = new ProviderService()
 
-// ─── Sanitization ─────────────────────────────────────────────────────────────
-
 function maskApiKey(key: string): string {
   if (key.length <= 8) return '****'
   return key.slice(0, 4) + '****' + key.slice(-4)
@@ -37,27 +36,36 @@ function sanitizeProvider(provider: Record<string, unknown>): Record<string, unk
   return provider
 }
 
-// ─── Router ───────────────────────────────────────────────────────────────────
-
 export async function handleProvidersApi(
   req: Request,
-  url: URL,
+  _url: URL,
   segments: string[],
 ): Promise<Response> {
   try {
-    const id = segments[2] // provider ID or 'test'
-    const action = segments[3] // 'activate' | 'test' | undefined
+    const id = segments[2]
+    const action = segments[3]
 
-    // ── POST /api/providers/test (test unsaved configuration) ──────────
+    // POST /api/providers/test
     if (id === 'test' && req.method === 'POST') {
       return await handleTestUnsaved(req)
     }
 
-    // ── /api/providers (no ID) ────────────────────────────────────────
+    // GET /api/providers/presets
+    if (id === 'presets' && req.method === 'GET') {
+      return Response.json({ presets: PROVIDER_PRESETS })
+    }
+
+    // POST /api/providers/official
+    if (id === 'official' && req.method === 'POST') {
+      await providerService.activateOfficial()
+      return Response.json({ ok: true })
+    }
+
+    // /api/providers (no ID)
     if (!id) {
       if (req.method === 'GET') {
-        const providers = await providerService.listProviders()
-        return Response.json({ providers: providers.map(sanitizeProvider) })
+        const { providers, activeId } = await providerService.listProviders()
+        return Response.json({ providers: providers.map(sanitizeProvider), activeId })
       }
       if (req.method === 'POST') {
         return await handleCreate(req)
@@ -65,20 +73,21 @@ export async function handleProvidersApi(
       throw methodNotAllowed(req.method)
     }
 
-    // ── /api/providers/:id/activate ───────────────────────────────────
+    // /api/providers/:id/activate
     if (action === 'activate') {
       if (req.method !== 'POST') throw methodNotAllowed(req.method)
-      return await handleActivate(req, id)
+      await providerService.activateProvider(id)
+      return Response.json({ ok: true })
     }
 
-    // ── /api/providers/:id/test ───────────────────────────────────────
+    // /api/providers/:id/test
     if (action === 'test') {
       if (req.method !== 'POST') throw methodNotAllowed(req.method)
       const result = await providerService.testProvider(id)
       return Response.json({ result })
     }
 
-    // ── /api/providers/:id (no action) ────────────────────────────────
+    // /api/providers/:id
     if (req.method === 'GET') {
       const provider = await providerService.getProvider(id)
       return Response.json({ provider: sanitizeProvider(provider) })
@@ -97,8 +106,6 @@ export async function handleProvidersApi(
   }
 }
 
-// ─── Handlers ─────────────────────────────────────────────────────────────────
-
 async function handleCreate(req: Request): Promise<Response> {
   const body = await parseJsonBody(req)
   try {
@@ -106,9 +113,7 @@ async function handleCreate(req: Request): Promise<Response> {
     const provider = await providerService.addProvider(input)
     return Response.json({ provider }, { status: 201 })
   } catch (err) {
-    if (err instanceof z.ZodError) {
-      throw ApiError.badRequest(err.issues.map((i) => i.message).join('; '))
-    }
+    if (err instanceof z.ZodError) throw ApiError.badRequest(err.issues.map((i) => i.message).join('; '))
     throw err
   }
 }
@@ -120,23 +125,7 @@ async function handleUpdate(req: Request, id: string): Promise<Response> {
     const provider = await providerService.updateProvider(id, input)
     return Response.json({ provider })
   } catch (err) {
-    if (err instanceof z.ZodError) {
-      throw ApiError.badRequest(err.issues.map((i) => i.message).join('; '))
-    }
-    throw err
-  }
-}
-
-async function handleActivate(req: Request, id: string): Promise<Response> {
-  const body = await parseJsonBody(req)
-  try {
-    const input = ActivateProviderSchema.parse(body)
-    await providerService.activateProvider(id, input.modelId)
-    return Response.json({ ok: true })
-  } catch (err) {
-    if (err instanceof z.ZodError) {
-      throw ApiError.badRequest(err.issues.map((i) => i.message).join('; '))
-    }
+    if (err instanceof z.ZodError) throw ApiError.badRequest(err.issues.map((i) => i.message).join('; '))
     throw err
   }
 }
@@ -148,15 +137,11 @@ async function handleTestUnsaved(req: Request): Promise<Response> {
     const result = await providerService.testProviderConfig(input)
     return Response.json({ result })
   } catch (err) {
-    if (err instanceof z.ZodError) {
-      throw ApiError.badRequest(err.issues.map((i) => i.message).join('; '))
-    }
+    if (err instanceof z.ZodError) throw ApiError.badRequest(err.issues.map((i) => i.message).join('; '))
     throw err
   }
 }
 
-// ─── Helpers ──────────────────────────────────────────────────────────────────
-
 async function parseJsonBody(req: Request): Promise<Record<string, unknown>> {
   try {
     return (await req.json()) as Record<string, unknown>