feat(llm): send DeepSeek user identity header

packages/llm/llm-deepseek/tests/loader-composition.spec.ts

@@ -21,6 +21,7 @@ import { credentialRef } from '@deepseek-ai/dsh-credentials'
 import CredentialsLocal from '@deepseek-ai/dsh-credentials-local'
 import { settingsNamespace } from '@deepseek-ai/dsh-settings'
 import SettingsLocal from '@deepseek-ai/dsh-settings-local'
+import { getOrCreateAnonymousUserId } from '@deepseek-ai/dsh-user-id'
 import * as LlmDeepSeek from '@deepseek-ai/dsh-llm-deepseek'
 import { assemble } from './assemble.ts'
 import { closeMockServers, mockServer, textEvents } from './mock-server.ts'
@@ -47,6 +48,7 @@ async function loadComposition(
   // exactly as the previous process left them.
   const fresh = options.reuseRoot === undefined
   root = options.reuseRoot ?? await mkdtemp(join(tmpdir(), 'dsh-llm-composition-'))
+  vi.stubEnv('DSH_HOME', root)
   const settingsPath = join(root, 'settings.yaml')
   const credentialsPath = join(root, '.credentials.yaml')
   if (options.withDynamic && fresh) {
@@ -115,6 +117,7 @@ describe('llm-deepseek real dynamic composition', () => {
     expect(ctx.get('settings')!.describe().map(entry => entry.ns)).toEqual([NS])
     await assemble(ctx, { model: 'deepseek-v4-flash', messages: [] })
     expect(serverA.headers[0]?.authorization).toBe('Bearer boot-key')
+    expect(serverA.headers[0]?.['x-deepseek-harness-user-id']).toBe(getOrCreateAnonymousUserId())
 
     // External edits, exactly as a user or the web UI would leave them on disk.
     await writeFile(settingsPath, `llm-deepseek:\n  baseURL: ${serverB.url}\n`)