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

# Conflicts:
#	.agents/notes/implemented/feature/2026-07-22-web-multimodal-image-input-and-durable-attachments.i18n.yaml
#	apps/web/tests/code-mode-fixture.snapshot.ts
#	apps/web/tests/image-display.snapshot.ts
#	docs/architecture.i18n.yaml
#	docs/module-graph.md
#	packages/client/test-runtime/tests/runtime.spec.tsx
#	packages/client/ui-conversation/src/client/skeleton/ConversationSession.tsx
#	packages/client/ui-conversation/tests/terminal-card.spec.tsx
#	packages/client/ui-trajectory/src/client/layout.ts

packages/client/runtime/tests/client-apply.spec.ts

@@ -74,12 +74,6 @@ describe('runtime client apply', () => {
     expect(workspaces.list.getSnapshot().items[0]?.workspaceId).toBe('w-new')
     // Mux sink and onConnected route without throwing (manager semantics own the behavior).
     bench.sinks?.onMuxEnvelope?.({ rpcId: 'r2' as never, payload: { type: 'stream/error', message: 'x' } as never })
-    bench.sinks?.onDescription?.({ version: '0', cwd: '/f', attachedSessions: 0 })
-    expect((sessions as { hostDescription(): unknown }).hostDescription()).toEqual({
-      version: '0',
-      cwd: '/f',
-      attachedSessions: 0,
-    })
     bench.sinks?.onConnected?.()
   })