fix api config auth and image model compatibility

tests/integration/api/specific/user-api-config-put.test.ts

@@ -34,6 +34,9 @@ type SavedProvider = {
 }
 
 const prismaMock = vi.hoisted(() => ({
+  user: {
+    findUnique: vi.fn<(...args: unknown[]) => Promise<{ id: string } | null>>(),
+  },
   userPreference: {
     findUnique: vi.fn<(...args: unknown[]) => Promise<UserPreferenceSnapshot | null>>(),
     upsert: vi.fn<(...args: unknown[]) => Promise<unknown>>(),
@@ -103,6 +106,7 @@ describe('api specific - user api-config PUT provider uniqueness', () => {
     vi.clearAllMocks()
     resetAuthMockState()
 
+    prismaMock.user.findUnique.mockResolvedValue({ id: 'user-1' })
     prismaMock.userPreference.findUnique.mockResolvedValue({
       customProviders: null,
       customModels: null,
@@ -111,6 +115,37 @@ describe('api specific - user api-config PUT provider uniqueness', () => {
     getBillingModeMock.mockResolvedValue('OFF')
   })
 
+  it('returns unauthorized when session user no longer exists before saving providers', async () => {
+    installAuthMocks()
+    mockAuthenticated('user-missing')
+    prismaMock.user.findUnique.mockResolvedValueOnce(null)
+    const route = await import('@/app/api/user/api-config/route')
+
+    const req = buildMockRequest({
+      path: '/api/user/api-config',
+      method: 'PUT',
+      body: {
+        providers: [
+          { id: 'openai-compatible:oa-1', name: 'OpenAI A', baseUrl: 'https://oa-a.test', apiKey: 'oa-key-a' },
+        ],
+      },
+    })
+
+    const res = await route.PUT(req, routeContext)
+    const body = await res.json() as {
+      error?: {
+        code?: string
+        message?: string
+      }
+    }
+
+    expect(res.status).toBe(401)
+    expect(body.error?.code).toBe('UNAUTHORIZED')
+    expect(body.error?.message).toBe('登录状态已失效，请重新登录')
+    expect(prismaMock.userPreference.findUnique).not.toHaveBeenCalled()
+    expect(prismaMock.userPreference.upsert).not.toHaveBeenCalled()
+  })
+
   it('allows multiple providers with the same api type when provider ids differ', async () => {
     installAuthMocks()
     mockAuthenticated('user-1')

tests/integration/api/specific/user-preference-art-style-validation.test.ts

@@ -9,6 +9,9 @@ const authMock = vi.hoisted(() => ({
 }))
 
 const prismaMock = vi.hoisted(() => ({
+  user: {
+    findUnique: vi.fn<(...args: unknown[]) => Promise<{ id: string } | null>>(),
+  },
   userPreference: {
     upsert: vi.fn(async () => ({
       userId: 'user-1',
@@ -25,6 +28,7 @@ describe('api specific - user preference art style validation', () => {
 
   beforeEach(() => {
     vi.clearAllMocks()
+    prismaMock.user.findUnique.mockResolvedValue({ id: 'user-1' })
   })
 
   it('accepts valid artStyle and persists normalized value', async () => {
@@ -58,4 +62,27 @@ describe('api specific - user preference art style validation', () => {
     expect(body.error.code).toBe('INVALID_PARAMS')
     expect(prismaMock.userPreference.upsert).not.toHaveBeenCalled()
   })
+
+  it('returns unauthorized when session user record is missing', async () => {
+    prismaMock.user.findUnique.mockResolvedValueOnce(null)
+    const mod = await import('@/app/api/user-preference/route')
+    const req = buildMockRequest({
+      path: '/api/user-preference',
+      method: 'PATCH',
+      body: { artStyle: 'realistic' },
+    })
+
+    const res = await mod.PATCH(req, routeContext)
+    const body = await res.json() as {
+      error?: {
+        code?: string
+        message?: string
+      }
+    }
+
+    expect(res.status).toBe(401)
+    expect(body.error?.code).toBe('UNAUTHORIZED')
+    expect(body.error?.message).toBe('登录状态已失效，请重新登录')
+    expect(prismaMock.userPreference.upsert).not.toHaveBeenCalled()
+  })
 })

tests/regression/user-session-persistence-guard.test.ts

@@ -0,0 +1,98 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { buildMockRequest } from '../helpers/request'
+import {
+  installAuthMocks,
+  mockAuthenticated,
+  resetAuthMockState,
+} from '../helpers/auth'
+
+const prismaMock = vi.hoisted(() => ({
+  user: {
+    findUnique: vi.fn<(...args: unknown[]) => Promise<{ id: string } | null>>(),
+  },
+  userPreference: {
+    findUnique: vi.fn<(...args: unknown[]) => Promise<{ customProviders: null; customModels: null } | null>>(),
+    upsert: vi.fn<(...args: unknown[]) => Promise<unknown>>(),
+  },
+}))
+
+const getBillingModeMock = vi.hoisted(() => vi.fn(async () => 'OFF'))
+
+vi.mock('@/lib/prisma', () => ({
+  prisma: prismaMock,
+}))
+
+vi.mock('@/lib/billing/mode', () => ({
+  getBillingMode: getBillingModeMock,
+}))
+
+describe('regression - persisted session user guard', () => {
+  const routeContext = { params: Promise.resolve({}) }
+
+  beforeEach(() => {
+    vi.resetModules()
+    vi.clearAllMocks()
+    resetAuthMockState()
+    installAuthMocks()
+    mockAuthenticated('user-missing')
+    prismaMock.user.findUnique.mockResolvedValue(null)
+    prismaMock.userPreference.findUnique.mockResolvedValue({
+      customProviders: null,
+      customModels: null,
+    })
+    prismaMock.userPreference.upsert.mockResolvedValue({ id: 'pref-1' })
+    getBillingModeMock.mockResolvedValue('OFF')
+  })
+
+  it('api-config PUT returns unauthorized before touching userPreference when session user row is missing', async () => {
+    const route = await import('@/app/api/user/api-config/route')
+    const req = buildMockRequest({
+      path: '/api/user/api-config',
+      method: 'PUT',
+      body: {
+        providers: [
+          {
+            id: 'openai-compatible:oa-1',
+            name: 'OpenAI A',
+            baseUrl: 'https://oa-a.test',
+            apiKey: 'oa-key-a',
+          },
+        ],
+      },
+    })
+
+    const res = await route.PUT(req, routeContext)
+    const body = await res.json() as { error?: { code?: string; message?: string } }
+
+    expect(res.status).toBe(401)
+    expect(body.error?.code).toBe('UNAUTHORIZED')
+    expect(body.error?.message).toBe('登录状态已失效，请重新登录')
+    expect(prismaMock.user.findUnique).toHaveBeenCalledWith({
+      where: { id: 'user-missing' },
+      select: { id: true },
+    })
+    expect(prismaMock.userPreference.findUnique).not.toHaveBeenCalled()
+    expect(prismaMock.userPreference.upsert).not.toHaveBeenCalled()
+  })
+
+  it('user-preference PATCH returns unauthorized before upsert when session user row is missing', async () => {
+    const route = await import('@/app/api/user-preference/route')
+    const req = buildMockRequest({
+      path: '/api/user-preference',
+      method: 'PATCH',
+      body: { artStyle: 'realistic' },
+    })
+
+    const res = await route.PATCH(req, routeContext)
+    const body = await res.json() as { error?: { code?: string; message?: string } }
+
+    expect(res.status).toBe(401)
+    expect(body.error?.code).toBe('UNAUTHORIZED')
+    expect(body.error?.message).toBe('登录状态已失效，请重新登录')
+    expect(prismaMock.user.findUnique).toHaveBeenCalledWith({
+      where: { id: 'user-missing' },
+      select: { id: true },
+    })
+    expect(prismaMock.userPreference.upsert).not.toHaveBeenCalled()
+  })
+})

tests/unit/generator-api.test.ts

@@ -118,6 +118,29 @@ describe('generator-api gateway routing', () => {
     expect(result).toEqual({ success: true, imageUrl: 'compat-template-image' })
   })
 
+  it('normalizes legacy openai-compatible gemini image model ids before template gateway call', async () => {
+    resolveModelSelectionMock.mockResolvedValueOnce({
+      provider: 'openai-compatible:oa-1',
+      modelId: 'gemini-3.1-flash-image',
+      modelKey: 'openai-compatible:oa-1::gemini-3.1-flash-image',
+      mediaType: 'image',
+      compatMediaTemplate: {
+        version: 1,
+        mediaType: 'image',
+        mode: 'sync',
+        create: { method: 'POST', path: '/v1/images/generations' },
+        response: { outputUrlPath: '$.data[0].url' },
+      },
+    })
+    resolveModelGatewayRouteMock.mockReturnValueOnce('openai-compat')
+
+    await generateImage('user-1', 'openai-compatible:oa-1::gemini-3.1-flash-image', 'draw hero')
+
+    expect(generateImageViaOpenAICompatTemplateMock).toHaveBeenCalledWith(expect.objectContaining({
+      modelId: 'gemini-3.1-flash-image-preview',
+    }))
+  })
+
   it('routes official image requests to provider generator', async () => {
     resolveModelSelectionMock.mockResolvedValueOnce({
       provider: 'google',