fix(FN-2116): restore agent run logs

packages/dashboard/src/routes.test.ts

@@ -14949,7 +14949,7 @@ describe("GET /api/agents/:id/runs/:runId/logs", () => {
     expect(res.body[1]).toMatchObject({ taskId: "FN-001", type: "tool" });
   });
 
-  it("returns empty array for run without contextSnapshot.taskId", async () => {
+  it("returns synthesized logs for run without contextSnapshot.taskId", async () => {
     // Create a run without contextSnapshot
     const { AgentStore } = await import("@fusion/core");
     const agentStore = new AgentStore({ rootDir: fusionDir });
@@ -14957,6 +14957,7 @@ describe("GET /api/agents/:id/runs/:runId/logs", () => {
     const run = await agentStore.startHeartbeatRun(agentId);
     run.endedAt = new Date().toISOString();
     run.status = "completed";
+    run.stdoutExcerpt = "Ambient heartbeat completed";
     // No contextSnapshot
     await agentStore.saveRun(run);
 
@@ -14971,7 +14972,13 @@ describe("GET /api/agents/:id/runs/:runId/logs", () => {
     const res = await REQUEST(app, "GET", `/api/agents/${agentId}/runs/${run.id}/logs`);
 
     expect(res.status).toBe(200);
-    expect(res.body).toEqual([]);
+    expect(res.body).toEqual([
+      expect.objectContaining({
+        taskId: "agent-run",
+        type: "text",
+        text: "Ambient heartbeat completed",
+      }),
+    ]);
   });
 
   it("returns 404 for non-existent run", async () => {

packages/dashboard/src/routes.ts

@@ -744,6 +744,41 @@ function logEntryToTimelineEntry(entry: import("@fusion/core").AgentLogEntry): T
   };
 }
 
+function runExcerptToAgentLogs(run: import("@fusion/core").AgentHeartbeatRun): import("@fusion/core").AgentLogEntry[] {
+  const entries: import("@fusion/core").AgentLogEntry[] = [];
+  const taskId = typeof run.contextSnapshot?.taskId === "string" ? run.contextSnapshot.taskId : "agent-run";
+
+  if (run.stdoutExcerpt?.trim()) {
+    entries.push({
+      timestamp: run.endedAt ?? run.startedAt,
+      taskId,
+      type: "text",
+      text: run.stdoutExcerpt,
+    });
+  }
+
+  if (run.stderrExcerpt?.trim()) {
+    entries.push({
+      timestamp: run.endedAt ?? run.startedAt,
+      taskId,
+      type: "tool_error",
+      text: "stderr",
+      detail: run.stderrExcerpt,
+    });
+  }
+
+  if (run.resultJson && Object.keys(run.resultJson).length > 0 && entries.length === 0) {
+    entries.push({
+      timestamp: run.endedAt ?? run.startedAt,
+      taskId,
+      type: "text",
+      text: JSON.stringify(run.resultJson, null, 2),
+    });
+  }
+
+  return entries;
+}
+
 function trimTaskDetailActivityLog<T extends Task>(task: T): T {
   if (!Array.isArray(task.log) || task.log.length <= TASK_DETAIL_ACTIVITY_LOG_LIMIT) {
     return task;
@@ -13066,7 +13101,7 @@ export function createApiRoutes(store: TaskStore, options?: ServerOptions): Rout
       // not the task active during a historical run.
       const taskId = run.contextSnapshot?.taskId as string | undefined;
       if (!taskId) {
-        res.json([]);
+        res.json(runExcerptToAgentLogs(run));
         return;
       }
 
@@ -13075,7 +13110,7 @@ export function createApiRoutes(store: TaskStore, options?: ServerOptions): Rout
         run.startedAt,
         run.endedAt,
       );
-      res.json(logs);
+      res.json(logs.length > 0 ? logs : runExcerptToAgentLogs(run));
     } catch (err: unknown) {
       if (err instanceof ApiError) {
         throw err;