fix(frontend): 移除运行时演示数据并接入真实后端状态

frontend/src/stores/chat.spec.ts

@@ -0,0 +1,43 @@
+import { beforeEach, expect, it, vi } from 'vitest'
+import { createPinia, setActivePinia } from 'pinia'
+import { useChatStore } from './chat'
+import { streamChat } from '@/services/chatService'
+import type { SseClient } from '@/services/sseClient'
+
+vi.mock('@/services/chatService', () => ({ streamChat: vi.fn() }))
+beforeEach(() => {
+  setActivePinia(createPinia())
+  vi.mocked(streamChat).mockReset().mockReturnValue({ cancel: vi.fn() } as unknown as SseClient)
+})
+
+it('sends real user history, applies streaming changes, and restores it when switching conversations', async () => {
+  const store = useChatStore()
+  store.selectedProviderId = 'real'
+  store.selectedModel = 'configured-model'
+  await store.sendMessage('user input')
+  const [request, handlers] = vi.mocked(streamChat).mock.calls[0]!
+  expect(request.messages).toEqual([{ role: 'user', content: 'user input' }])
+  handlers.onEvent?.({ event: 'TextDelta', sequence: 0, timestamp: '', data: { text: 'real response' } })
+  expect(store.messages[1]?.content).toBe('real response')
+  handlers.onDone?.()
+  const id = store.activeConversationId!
+  store.createNewConversation()
+  expect(store.messages).toEqual([])
+  await store.setActiveConversation(id)
+  expect(store.messages.map(m => m.content)).toEqual(['user input', 'real response'])
+})
+
+it('does not send without a provider and ignores late callbacks from a cancelled conversation', async () => {
+  const store = useChatStore()
+  await store.sendMessage('no provider')
+  expect(streamChat).not.toHaveBeenCalled()
+  store.selectedProviderId = 'real'
+  store.selectedModel = 'configured-model'
+  await store.sendMessage('first')
+  const old = vi.mocked(streamChat).mock.calls[0]![1]
+  store.createNewConversation()
+  await store.sendMessage('second')
+  old.onDone?.()
+  expect(store.isStreaming).toBe(true)
+  expect(store.messages[0]?.content).toBe('second')
+})