test(client): align card fixtures with subagent session state

packages/client/ui-conversation/tests/diff-card.spec.tsx

@@ -156,6 +156,8 @@ describe('FileMutationRow diff card', () => {
     byId: { [SID]: { id: SID, displayTitle: 'r', running: false, blank: false, waitingApproval: false, updatedAt: 0, cwd: '/w/app' } },
     current: SID,
     phase: 'ready',
+    subagentsByParent: {},
+    currentAddress: undefined,
   })
 
   const rowProps = (block: RunningToolCall | ToolResultNode, toolName = 'edit'): FileMutationRowProps => ({
@@ -301,12 +303,14 @@ describe('DetailsPanel diff Output section', () => {
     const chat = createChatStore().create()
     if (selection !== null) chat.actions.select(selection)
     const sessions = createSnapshotStore<SessionListState>(cwd === undefined
-      ? { ids: [], byId: {}, current: undefined, phase: 'ready' }
+      ? { ids: [], byId: {}, current: undefined, phase: 'ready', subagentsByParent: {}, currentAddress: undefined }
       : {
         ids: [SID],
         byId: { [SID]: { id: SID, displayTitle: 'r', running: false, blank: false, waitingApproval: false, updatedAt: 0, cwd } },
         current: SID,
         phase: 'ready',
+        subagentsByParent: {},
+        currentAddress: undefined,
       })
     const workspaces = createSnapshotStore<WorkspaceListState>({
       items: [], archivedSessionIds: [], state: 'idle', phase: 'ready', error: null,
@@ -334,7 +338,7 @@ describe('DetailsPanel diff Output section', () => {
       sessionId: SID, nodes: [], partial: null, runningCalls: [], codeDispatches: new Map(),
       pending: [], queue: [], running: false, composerPhase: 'active', removed: false,
       openState: 'open', openError: null, hasMore: false, loadingOlder: false,
-      promptError: null, blank: false, lastAgentError: null, ...over,
+      promptError: null, blank: false, subagent: null, lastAgentError: null, ...over,
     }
   }