Port artifact events to the items stream and finish the main merge

Why: the merge commit left tsc broken in two spots - an artifact.created
handler still pushing to the removed LiveState.parts, and main's newer ui
icons not yet checked out in this worktree; also Part was imported unused.

Evidence: artifact.created now appends an artifact LiveItem (process=true,
matching the backend's ae8e5d0) projected to artifact_ref by
liveToMessage; new test asserts it lands after its tool call. tsc -b exit
0 after initializing the ui submodule checkout; vitest 33/33.

Impact: live artifact chips render inside the process stream and fold on
reconcile; no functional change elsewhere.

Refs: feature/chat-process-split-r1

src/live.ts

@@ -14,6 +14,7 @@ export type LiveItem =
   | { kind: 'thinking'; text: string }
   | { kind: 'text'; index: number; text: string }
   | { kind: 'tool'; callId?: string; name: string; status?: string; summary?: string }
+  | { kind: 'artifact'; artifact: { artifactId: string; name: string; kind?: string } }
 
 // applyThinkingDelta 并入思考增量：末段是思考则追加，否则开启新思考段（新轮开始）。
 export function applyThinkingDelta(items: LiveItem[], delta: string): LiveItem[] {
@@ -41,6 +42,11 @@ export function applyToolCall(items: LiveItem[], name: string, callId?: string):
   return [...items, { kind: 'tool', callId, name }]
 }
 
+// applyArtifactCreated 追加工件引用（artifact.created 事件；与落库一致标记为过程）。
+export function applyArtifactCreated(items: LiveItem[], artifact: { artifactId: string; name: string; kind?: string }): LiveItem[] {
+  return [...items, { kind: 'artifact', artifact }]
+}
+
 // applyToolResult 回填对应工具（优先按 callId 配对，回落到最近一个未决工具——
 // 与落库的尾部配对语义一致）。
 export function applyToolResult(items: LiveItem[], callId: string | undefined, status: string, summary?: string): LiveItem[] {
@@ -77,6 +83,8 @@ export function liveToMessage(live: LiveState): Message {
         parts.push({ type: 'tool_result', process: true, toolCall: { id: it.callId ?? '', name: it.name },
           toolResult: { callId: it.callId ?? '', status: it.status === 'error' ? 'error' : 'ok', summary: it.summary } })
       }
+    } else if (it.kind === 'artifact') {
+      parts.push({ type: 'artifact_ref', process: true, artifact: it.artifact })
     } else {
       parts.push({ type: 'text', text: it.text, process: textProcess.get(i) || undefined })
     }

src/store.ts

@@ -2,10 +2,10 @@
 // useSyncExternalStore 驱动；live 流式部件为会话内临时态，run 终态后由消息树对账收敛。
 import { useSyncExternalStore } from 'react'
 import { api, connectEvents } from './api'
-import { applyTextDelta, applyThinkingDelta, applyToolCall, applyToolResult, type LiveItem } from './live'
+import { applyTextDelta, applyThinkingDelta, applyToolCall, applyToolResult, applyArtifactCreated, type LiveItem } from './live'
 import type {
   Project, Conversation, Message, Run, Artifact, HITLCard, PlanSnapshot, TodoList,
-  AgentProfile, StreamEvent, PluginPanel, ActivityCard, Part,
+  AgentProfile, StreamEvent, PluginPanel, ActivityCard,
 } from './contracts'
 
 export interface ContextObs {
@@ -342,7 +342,7 @@ export const store = {
         const p = e.payload as { artifact?: { id: string; name: string; kind?: string } }
         if (p?.artifact) {
           set({ live: touchLive(e.runId ?? '', l => {
-            l.parts.push({ type: 'artifact_ref', artifact: { artifactId: p.artifact!.id, name: p.artifact!.name, kind: p.artifact!.kind } })
+            l.items = applyArtifactCreated(l.items, { artifactId: p.artifact!.id, name: p.artifact!.name, kind: p.artifact!.kind })
           }) })
         }
         if (state.currentProjectId) store.refreshArtifacts(state.currentProjectId)

test/live.test.ts

@@ -2,7 +2,7 @@
 // 轮次穿插同构、过程区折叠谓词。
 import { describe, it, expect } from 'vitest'
 import {
-  applyTextDelta, applyThinkingDelta, applyToolCall, applyToolResult,
+  applyTextDelta, applyThinkingDelta, applyToolCall, applyToolResult, applyArtifactCreated,
   liveToMessage, showProcessInline, type LiveItem,
 } from '../src/live'
 import type { LiveState } from '../src/store'
@@ -122,6 +122,18 @@ describe('liveToMessage', () => {
     const msg = liveToMessage(live({ items }))
     for (const p of msg.parts.filter(p => p.type !== 'text')) expect(p.process).toBe(true)
   })
+  it('artifact refs land after their tool call and are process', () => {
+    let items: LiveItem[] = []
+    items = applyTextDelta(items, 0, '生成报表。')
+    items = applyToolCall(items, 'make_report', 'c1')
+    items = applyToolResult(items, 'c1', 'ok')
+    items = applyArtifactCreated(items, { artifactId: 'a1', name: 'report.csv', kind: 'csv' })
+    items = applyTextDelta(items, 1, '完成。')
+    const msg = liveToMessage(live({ items }))
+    expect(msg.parts.map(p => p.type)).toEqual(['text', 'tool_call', 'tool_result', 'artifact_ref', 'text'])
+    expect(msg.parts.find(p => p.type === 'artifact_ref')).toMatchObject({ process: true })
+    expect(msg.parts.filter(p => p.type === 'text').map(p => p.process)).toEqual([true, undefined])
+  })
 })
 
 describe('showProcessInline', () => {

tsconfig.tsbuildinfo

@@ -1 +1 @@
-{"root":["./src/App.tsx","./src/api.ts","./src/auth.ts","./src/contracts.ts","./src/live.ts","./src/main.tsx","./src/messageparts.ts","./src/passwords.ts","./src/store.ts","./src/tasklist.ts","./src/components/AdminUsersModal.tsx","./src/components/AgentTracker.tsx","./src/components/Conversation.tsx","./src/components/DocViewer.tsx","./src/components/LoginPage.tsx","./src/components/ProjectSettingsModal.tsx","./src/components/SettingsModal.tsx","./src/components/TaskSidebar.tsx","./src/components/Workbench.tsx","./src/components/Workspaces.tsx","./test/auth.test.ts","./test/contracts.test.ts","./test/live.test.ts","./test/messageparts.test.ts","./test/tasklist.test.ts"],"errors":true,"version":"5.9.3"}
+{"root":["./src/App.tsx","./src/api.ts","./src/auth.ts","./src/contracts.ts","./src/live.ts","./src/main.tsx","./src/messageparts.ts","./src/passwords.ts","./src/store.ts","./src/tasklist.ts","./src/components/AdminUsersModal.tsx","./src/components/AgentTracker.tsx","./src/components/Conversation.tsx","./src/components/DocViewer.tsx","./src/components/LoginPage.tsx","./src/components/ProjectSettingsModal.tsx","./src/components/SettingsModal.tsx","./src/components/TaskSidebar.tsx","./src/components/Workbench.tsx","./src/components/Workspaces.tsx","./test/auth.test.ts","./test/contracts.test.ts","./test/live.test.ts","./test/messageparts.test.ts","./test/tasklist.test.ts"],"version":"5.9.3"}