fix: land multi-agent session path fix + regressions (#15103) (#15448)

Co-authored-by: Josh Lehman <josh@martian.engineering>

src/gateway/server-methods/usage.sessions-usage.test.ts

@@ -64,10 +64,20 @@ vi.mock("../../infra/session-cost-usage.js", async () => {
       cacheWriteCost: 0,
       missingCostEntries: 0,
     })),
+    loadSessionUsageTimeSeries: vi.fn(async () => ({
+      sessionId: "s-opus",
+      points: [],
+    })),
+    loadSessionLogs: vi.fn(async () => []),
   };
 });
 
-import { discoverAllSessions } from "../../infra/session-cost-usage.js";
+import {
+  discoverAllSessions,
+  loadSessionCostSummary,
+  loadSessionLogs,
+  loadSessionUsageTimeSeries,
+} from "../../infra/session-cost-usage.js";
 import { loadCombinedSessionStoreForGateway } from "../session-utils.js";
 import { usageHandlers } from "./usage.js";
 
@@ -148,6 +158,10 @@ describe("sessions.usage", () => {
       const result = respond.mock.calls[0]?.[1] as unknown as { sessions: Array<{ key: string }> };
       expect(result.sessions).toHaveLength(1);
       expect(result.sessions[0]?.key).toBe(storeKey);
+      expect(vi.mocked(loadSessionCostSummary)).toHaveBeenCalled();
+      expect(
+        vi.mocked(loadSessionCostSummary).mock.calls.some((call) => call[0]?.agentId === "opus"),
+      ).toBe(true);
     } finally {
       if (previousStateDir === undefined) {
         delete process.env.OPENCLAW_STATE_DIR;
@@ -176,4 +190,32 @@ describe("sessions.usage", () => {
     const error = respond.mock.calls[0]?.[2] as { message?: string } | undefined;
     expect(error?.message).toContain("Invalid session reference");
   });
+
+  it("passes parsed agentId into sessions.usage.timeseries", async () => {
+    const respond = vi.fn();
+
+    await usageHandlers["sessions.usage.timeseries"]({
+      respond,
+      params: {
+        key: "agent:opus:s-opus",
+      },
+    } as unknown as Parameters<(typeof usageHandlers)["sessions.usage.timeseries"]>[0]);
+
+    expect(vi.mocked(loadSessionUsageTimeSeries)).toHaveBeenCalled();
+    expect(vi.mocked(loadSessionUsageTimeSeries).mock.calls[0]?.[0]?.agentId).toBe("opus");
+  });
+
+  it("passes parsed agentId into sessions.usage.logs", async () => {
+    const respond = vi.fn();
+
+    await usageHandlers["sessions.usage.logs"]({
+      respond,
+      params: {
+        key: "agent:opus:s-opus",
+      },
+    } as unknown as Parameters<(typeof usageHandlers)["sessions.usage.logs"]>[0]);
+
+    expect(vi.mocked(loadSessionLogs)).toHaveBeenCalled();
+    expect(vi.mocked(loadSessionLogs).mock.calls[0]?.[0]?.agentId).toBe("opus");
+  });
 });