Merge latest master into PR 555

# Conflicts:
#	docs/architecture.i18n.yaml
#	docs/core-data-structures/core.i18n.yaml
#	examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl
#	packages/client/runtime/README.i18n.yaml
#	packages/client/ui-conversation/README.i18n.yaml
#	packages/client/ui-conversation/src/client/chat/MessageItem.tsx
#	packages/compact/compact-basic/README.i18n.yaml
#	packages/ui/tui/README.i18n.yaml

packages/client/ui-conversation/tests/chat-view.spec.tsx

@@ -8,7 +8,7 @@ import { Profiler } from 'react'
 import { act, cleanup, fireEvent, render, within } from '@testing-library/react'
 import type {
   AssistantMessageNode, CommandNode, ConversationNode, ConversationSnapshot,
-  ModelRetryNode, RunningToolCall, SessionId, SessionListState, ToolResultNode,
+  ModelRetryNode, RunningToolCall, SessionId, SessionListState, ToolResultNode, TurnErrorNode,
   UserMessageNode, WorkspaceListState,
 } from '@deepseek-ai/dsh-client-runtime/client'
 import { bindSnapshotSelector } from '@deepseek-ai/dsh-client-web-react'
@@ -75,6 +75,11 @@ const retry = (seq: number): ModelRetryNode => ({
   retry: 1, maxRetries: 2, delayMs: 450,
   failure: { code: 'TRANSPORT', message: '连接被重置' },
 })
+const turnError = (seq: number, code?: string): TurnErrorNode => ({
+  kind: 'turn-error', seq, time: seq * 1_000, turn: 1, step: 0,
+  message: seq === 2 ? 'API key is invalid' : 'plugin exploded',
+  ...(code === undefined ? {} : { code }),
+})
 const toolResult = (seq: number, callId: string, name = 'bash'): ToolResultNode => ({
   kind: 'tool-result', seq, time: seq * 1_000, callId,
   call: { name, argsRaw: `{"command":"cmd-${callId}","description":"run ${callId}"}` },
@@ -295,6 +300,16 @@ describe('ChatView', () => {
     expect(within(cancelledDisclosure).getByRole('status').textContent).toContain('重试已取消')
   })
 
+  it('renders terminal turn failures inline with their durable message and optional code', () => {
+    const h = makeHarness({ nodes: [user(1, 'try'), turnError(2, 'AUTH'), turnError(3)] })
+    const view = render(<h.ChatView {...h.props} />)
+    const statuses = view.getAllByRole('status')
+    expect(statuses.map(status => status.textContent)).toEqual([
+      '本轮运行失败API key is invalidAUTH',
+      '本轮运行失败plugin exploded',
+    ])
+  })
+
   it('the expanded row Inspect pill hands the call id to inspectCall', () => {
     const h = makeHarness({
       nodes: [toolResult(3, 'a')],

packages/client/ui-conversation/tests/skeleton.spec.tsx

@@ -80,16 +80,25 @@ function mount(
   snapshot: ConversationSnapshot,
   workspaceRows: WorkspaceView[] = [{ ...workspace('one'), sessionIds: [SID] }],
   retargetWorkspace = vi.fn(async (_workspaceId: WorkspaceId) => {}),
-  /** When true, mimic overlay:true chain siblings (hidden fallback + takeover). */
-  overlayTakeover = false,
+  options: {
+    /** When true, mimic overlay:true chain siblings (hidden fallback + takeover). */
+    overlayTakeover?: boolean
+    /** The session list summary's `blank` flag — independent of the snapshot's. */
+    summaryBlank?: boolean
+    /** Drop the session's summary row entirely (a session the list has not caught up with). */
+    omitSummaryRow?: boolean
+  } = {},
 ) {
   const root = sid('root')
+  const rootRow = { id: root, displayTitle: 'Root', running: false, waitingApproval: false, blank: false, updatedAt: 1 }
+  const childRow = {
+    id: SID, displayTitle: 'Child', parentId: root, cwd: '/projects/one',
+    running: false, waitingApproval: false, blank: options.summaryBlank ?? false, updatedAt: 2,
+  }
+  const listed = options.omitSummaryRow !== true
   const sessions = createSnapshotStore<SessionListState>({
-    ids: [root, SID],
-    byId: {
-      [root]: { id: root, displayTitle: 'Root', running: false, waitingApproval: false, blank: false, updatedAt: 1 },
-      [SID]: { id: SID, displayTitle: 'Child', parentId: root, cwd: '/projects/one', running: false, waitingApproval: false, blank: false, updatedAt: 2 },
-    },
+    ids: listed ? [root, SID] : [root],
+    byId: { [root]: rootRow, ...listed && { [SID]: childRow } },
     current: SID,
     phase: 'ready',
   })
@@ -171,7 +180,7 @@ function mount(
     return <div data-testid={`view-${opts?.only ?? key}`} />
   }) as ConversationRootProps['renderSlot']
   const renderSlotChain = ((_key, _owner, opts) => (
-    overlayTakeover
+    options.overlayTakeover === true
       ? (
         <>
           <div data-chain-overlay-fallback="conversation.composer" style={{ display: 'none' }}>
@@ -233,7 +242,7 @@ describe('ConversationRoot resident composer', () => {
   })
 
   it('sticky composer seat wraps the whole overlay chain, not only the fallback stack', () => {
-    const b = mount(conversationSnapshot(), undefined, undefined, true)
+    const b = mount(conversationSnapshot(), undefined, undefined, { overlayTakeover: true })
     const seat = b.view.container.querySelector('[data-composer-seat]')
     const takeover = b.view.getByTestId('composer-takeover')
     const fallback = b.view.container.querySelector('[data-chain-overlay-fallback="conversation.composer"]')
@@ -274,6 +283,39 @@ describe('ConversationRoot resident composer', () => {
     expect(b.view.getByText('Selected Folder')).toBeTruthy()
   })
 
+  it('settling phase: a summary that does not prove the session blank hides the composer while it opens', () => {
+    const b = mount(conversationSnapshot({ composerPhase: 'blank', blank: true, openState: 'loading' }))
+    const root = b.view.container.querySelector('[data-phase]')
+    expect(root?.getAttribute('data-phase')).toBe('settling')
+    expect(b.view.queryByText('开始构建吧')).toBeNull()
+  })
+
+  it('settling phase: a session the list has no row for settles conservatively', () => {
+    const b = mount(
+      conversationSnapshot({ composerPhase: 'blank', blank: true, openState: 'loading' }),
+      undefined,
+      undefined,
+      { omitSummaryRow: true },
+    )
+    const root = b.view.container.querySelector('[data-phase]')
+    expect(root?.getAttribute('data-phase')).toBe('settling')
+  })
+
+  it('startup auto-selection: a summary-proven blank session opens straight into the hero', () => {
+    const b = mount(
+      conversationSnapshot({ composerPhase: 'blank', blank: true, openState: 'loading' }),
+      undefined,
+      undefined,
+      { summaryBlank: true },
+    )
+    // The summary already proves the outcome, so the settling hide would only
+    // blank the column for the history round-trip.
+    const root = b.view.container.querySelector('[data-phase]')
+    expect(root?.getAttribute('data-phase')).toBe('hero')
+    expect(b.view.getByText('开始构建吧')).toBeTruthy()
+    expect(b.view.getByRole('textbox')).toBeTruthy()
+  })
+
   it('same textarea DOM node survives the hero → active flip into the sticky scrollport', () => {
     const b = mount(conversationSnapshot({ composerPhase: 'blank', blank: true }))
     const before = b.view.getByRole('textbox')