fix(headless): dsh run is a direct core front door

packages/client/connection/tests/fake-api.ts

@@ -3,7 +3,7 @@
 // deferred-controlled timing). Streams are hand pumps: pushMux/pushHost.
 import type { CommandId } from '@deepseek-ai/dsh-commands/brand'
 import type {
-  CommandDescriptor, HostFrame, IApiClient, ModelTarget, MuxFrame,
+  CommandDescriptor, HostFrame, IApiClient, ModelSelection, MuxFrame,
   RpcRequest, RpcResponse, SessionId, SessionModels, SessionSearchItem, SkillEntry,
 } from '../src/client/api.ts'
 import { RpcId } from '../src/client/api.ts'
@@ -50,11 +50,11 @@ export class FakeApiClient implements IApiClient {
   onRename: (payload: unknown) => Promise<RpcResponse<{ title: string; seq: number }>> = () => Promise.resolve(ok({ title: 'fk-renamed', seq: 0 }))
   onFork: (payload: unknown) => Promise<RpcResponse<{ sessionId: SessionId }>> = () => Promise.resolve(ok({ sessionId: 'fk-fork' as SessionId }))
   onHistory: (payload: { sessionId: SessionId; beforeSeq?: number; maxMessages?: number })
-  => Promise<RpcResponse<{ events: never[]; hasMore: boolean; modelTarget: ModelTarget }>> =
+  => Promise<RpcResponse<{ events: never[]; hasMore: boolean; modelSelection: ModelSelection }>> =
     () => Promise.resolve(ok({
       events: [],
       hasMore: false,
-      modelTarget: { provider: 'deepseek-official', model: 'deepseek-chat' },
+      modelSelection: { provider: 'deepseek-official', model: 'deepseek-chat' },
     }))
 
   onModels: (payload: unknown) => Promise<RpcResponse<SessionModels>> = () => Promise.resolve(ok({
@@ -63,8 +63,8 @@ export class FakeApiClient implements IApiClient {
     groups: [],
     failures: [],
   }))
-  onSelectModel: (payload: ModelTarget & { sessionId: SessionId })
-  => Promise<RpcResponse<{ selected: ModelTarget }>> =
+  onSelectModel: (payload: ModelSelection & { sessionId: SessionId })
+  => Promise<RpcResponse<{ selected: ModelSelection }>> =
     payload => Promise.resolve(ok({ selected: { provider: payload.provider, model: payload.model } }))
   onPrompt: (payload: unknown) => Promise<RpcResponse<{ accepted: true }>> = () => Promise.resolve(ok({ accepted: true as const }))
   onUpdateQueue: (payload: unknown) => Promise<RpcResponse<{ accepted: true }>> = () => Promise.resolve(ok({ accepted: true as const }))
@@ -105,7 +105,7 @@ export class FakeApiClient implements IApiClient {
     history: (payload: { sessionId: SessionId; beforeSeq?: number; maxMessages?: number }) =>
       this.record('session.history', payload, this.onHistory(payload)),
     models: (payload: unknown) => this.record('session.models', payload, this.onModels(payload)),
-    selectModel: (payload: ModelTarget & { sessionId: SessionId }) =>
+    selectModel: (payload: ModelSelection & { sessionId: SessionId }) =>
       this.record('session.selectModel', payload, this.onSelectModel(payload)),
     rename: (payload: unknown) => this.record('session.rename', payload, this.onRename(payload)),
     fork: (payload: unknown) => this.record('session.fork', payload, this.onFork(payload)),

packages/client/connection/tests/fixture.spec.ts

@@ -168,7 +168,7 @@ describe('createFixtureApi', () => {
     })
   })
 
-  it('serves grouped models and keeps a selected target for later history and fixture requests', async () => {
+  it('serves grouped models and keeps a selection for later history and fixture requests', async () => {
     const api = createFixtureApi()
     const sessionId = sid('fx-alpha')
     const catalog = await api.sessions.models(req({ sessionId }))