refactor: add authoritative revalidation on app resume and reconnect

packages/server/src/client/daemon-client.test.ts

@@ -1631,6 +1631,7 @@ describe('DaemonClient', () => {
         payload: {
           requestId: 'req-1',
           agentId: 'agent_cli',
+          agent: null,
           direction: 'tail',
           projection: 'projected',
           epoch: 'epoch-1',
@@ -1724,6 +1725,7 @@ describe('DaemonClient', () => {
         payload: {
           requestId: 'req-invalid',
           agentId: 'agent_cli',
+          agent: null,
           direction: 'tail',
           projection: 'projected',
           epoch: 'epoch-1',

packages/server/src/server/session.ts

@@ -5975,6 +5975,7 @@ export class Session {
 
     try {
       const snapshot = await this.ensureAgentLoaded(msg.agentId)
+      const agentPayload = await this.buildAgentPayload(snapshot)
 
       let timeline = this.agentManager.fetchTimeline(msg.agentId, {
         direction,
@@ -6065,6 +6066,7 @@ export class Session {
         payload: {
           requestId: msg.requestId,
           agentId: msg.agentId,
+          agent: agentPayload,
           direction,
           projection,
           epoch: timeline.epoch,
@@ -6090,6 +6092,7 @@ export class Session {
         payload: {
           requestId: msg.requestId,
           agentId: msg.agentId,
+          agent: null,
           direction,
           projection,
           epoch: '',

packages/server/src/shared/messages.stream-parsing.test.ts

@@ -15,6 +15,7 @@ describe('shared messages stream parsing', () => {
       payload: {
         requestId: 'req-1',
         agentId: 'agent_live',
+        agent: null,
         direction: 'tail',
         projection: 'projected',
         epoch: 'epoch-1',

packages/server/src/shared/messages.ts

@@ -1594,6 +1594,7 @@ export const FetchAgentTimelineResponseMessageSchema = z.object({
   payload: z.object({
     requestId: z.string(),
     agentId: z.string(),
+    agent: AgentSnapshotPayloadSchema.nullable(),
     direction: z.enum(['tail', 'before', 'after']),
     projection: z.enum(['projected', 'canonical']),
     epoch: z.string(),