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

# Conflicts:
#	.agents/notes/implemented/architecture/2026-07-25-web-input-machine-and-slash-pipeline.i18n.yaml
#	apps/web/tests/code-mode-fixture.snapshot.ts
#	docs/architecture.i18n.yaml
#	docs/core-data-structures/core.i18n.yaml
#	docs/module-graph.md
#	packages/README.i18n.yaml
#	packages/client/runtime/README.i18n.yaml
#	packages/client/runtime/README.md
#	packages/client/runtime/README.zh.md
#	packages/client/test-runtime/tests/runtime.spec.tsx
#	packages/client/ui-conversation/README.i18n.yaml
#	packages/client/ui-conversation/package.json
#	packages/client/ui-conversation/src/client/chat/ChatView.tsx
#	packages/client/ui-conversation/src/client/skeleton/ConversationSession.tsx
#	packages/client/ui-conversation/src/client/skeleton/InputBar.tsx
#	packages/client/ui-conversation/tests/skeleton.spec.tsx
#	packages/compact/compact-basic/README.i18n.yaml
#	packages/compact/compact-basic/README.zh.md
#	packages/compact/compact-basic/src/summarizer.ts
#	packages/host/apiproxy/src/api/sessions.ts
#	packages/llm/llm-pi-ai/README.i18n.yaml
#	packages/llm/llm/README.i18n.yaml
#	packages/ui/tui/README.i18n.yaml
#	pnpm-lock.yaml

packages/host/apiproxy/tests/client-handler.spec.ts

@@ -46,6 +46,7 @@ function scriptedApi(overrides: {
       selectModel: r => ok(r, {
         selected: { provider: r.payload.provider, model: r.payload.model },
       }),
+      rename: r => ok(r, { title: 'renamed', seq: 0 }),
       prompt: r => ok(r, { accepted: true as const }),
       attachment: r => ok(r, {
         attachment: { attachmentId: 'a' as never, mediaType: 'image/png', bytes: 1, width: 1, height: 1 },