Merge remote-tracking branch 'origin/master' into worktree/web-multimodal-image-input

# Conflicts:
#	apps/cli/README.i18n.yaml
#	docs/core-data-structures/core.i18n.yaml
#	docs/core-data-structures/llm-streaming.i18n.yaml
#	examples/acp-agent/tests/snapshots/cordis-inspect-jsdoc/session.jsonl
#	packages/client/connection/src/client/fixture.ts
#	packages/client/connection/src/client/index.ts
#	packages/client/runtime/README.i18n.yaml
#	packages/client/runtime/README.md
#	packages/client/runtime/README.zh.md
#	packages/client/ui-conversation/README.i18n.yaml
#	packages/client/ui-conversation/src/client/input/hub.ts
#	packages/client/ui-conversation/src/client/service.ts
#	packages/client/ui-conversation/src/client/skeleton/InputBar.tsx
#	packages/compact/compact-basic/src/summarizer.ts
#	packages/compact/compact-basic/tests/compact-basic.spec.ts
#	packages/host/apiproxy/src/api-proxy.ts
#	packages/host/apiproxy/src/api/rpc.schema.ts
#	packages/host/apiproxy/src/api/rpc.ts
#	packages/host/apiproxy/src/api/sessions.ts
#	packages/host/apiproxy/tests/rpc-schemas.spec.ts
#	packages/llm/llm-deepseek/tests/serialize.spec.ts
#	packages/llm/llm-pi-ai/tests/adapter.spec.ts
#	packages/llm/llm-pi-ai/tests/convert.spec.ts
#	packages/llm/llm-pi-ai/tests/provider-apis.e2e.ts
#	packages/llm/token-meter/tests/token-meter.spec.ts
#	packages/ui/tui/README.i18n.yaml

packages/client/ui-conversation/tests/input-bar.spec.tsx

@@ -31,6 +31,8 @@ function snapshotOf(overrides: Partial<ConversationSnapshot> = {}): Conversation
 
 interface BenchOptions {
   planEntry?: React.ReactNode
+  /** The `plan` projection value the standard-kit useProjection serves. */
+  plan?: { active: boolean; pending: boolean }
   modelEntry?: React.ReactNode
   /** Hot text-ref lexicon (injects a minimal slash stub exposing only lexicon()). */
   lexicon?: ReadonlyMap<'/' | '@', readonly string[]>
@@ -93,7 +95,8 @@ function bench(over?: BenchOptions) {
       items: [], state: 'idle', phase: 'ready', error: null,
       baselinesReady: true, recentWorkspaceId: undefined,
     })),
-    useProjection: (() => undefined),
+    useProjection: ((_key: string, selector?: (v: unknown) => unknown) =>
+      (selector ?? (v => v))(over?.plan)),
     useInput: bindSnapshotSelector(shell.state),
     inputActions: shell.actions,
     keyboard: shell,
@@ -241,6 +244,20 @@ describe('running and lock semantics (queue cut 1)', () => {
     const custom = bench({ placeholder: 'Custom placeholder' })
     expect(custom.textarea.placeholder).toBe('Custom placeholder')
   })
+
+  it('the plan projection swaps the placeholder while its effective target is plan mode', () => {
+    const active = bench({ plan: { active: true, pending: false } })
+    expect(active.textarea.placeholder).toBe('describe your task to generate plan')
+    // /plan just ran: pending entry already reads as the plan target.
+    const entering = bench({ plan: { active: false, pending: true } })
+    expect(entering.textarea.placeholder).toBe('describe your task to generate plan')
+    // Pending exit: target is default again.
+    const leaving = bench({ plan: { active: true, pending: true } })
+    expect(leaving.textarea.placeholder).toBe('Message the agent')
+    // Owner placeholder outranks the plan swap.
+    const custom = bench({ plan: { active: true, pending: false }, placeholder: 'Custom placeholder' })
+    expect(custom.textarea.placeholder).toBe('Custom placeholder')
+  })
 })
 
 describe('machine pending lock', () => {
@@ -261,7 +278,6 @@ describe('machine pending lock', () => {
     expect(shell.snapshot.phase).toBe('submitting')
     const textarea = view.container.querySelector('textarea')!
     expect(textarea.readOnly).toBe(true)
-    expect(view.container.querySelector('[data-input-pending]')).not.toBeNull()
     expect(view.container.querySelector<HTMLButtonElement>('button[aria-label="Send message"]')!.disabled).toBe(true)
   })
 })