feat(hub): usage fact breakdown API + admin usage/session UI + release v0.0.34 (#10)

Expose UsageFact kind/capability rollups on org and project usage reports, and add admin pages that separate model tokens from external-capability meters.

Co-authored-by: Hong Jiarong <me@jrhim.com>
Co-committed-by: Hong Jiarong <me@jrhim.com>

hub/test/integration/usage.test.ts

@@ -71,7 +71,7 @@ describe("usage rollup from UsageFact (ADR-0026)", () => {
           occurredAt: new Date(startedAt.getTime() + i * 1000),
           kind: f.kind ?? "model_completion",
           provider: f.provider ?? "openrouter",
-          model: f.model ?? "mock-model",
+          model: f.model !== undefined ? f.model : "mock-model",
           inputTokens: f.inputTokens ?? null,
           outputTokens: f.outputTokens ?? null,
           costUsd: f.costUsd ?? null,
@@ -158,6 +158,32 @@ describe("usage rollup from UsageFact (ADR-0026)", () => {
     expect(report.totals.inputTokens).toBe(100);
     expect(report.totals.outputTokens).toBe(50);
     expect(report.totals.costUsd).toBeCloseTo(0.035, 8);
+    // ADR-0026 breakdown: model tokens vs external non-token meter must not collapse.
+    expect(report.breakdown).toHaveLength(2);
+    const modelBucket = report.breakdown.find((b) => b.kind === "model_completion");
+    const capBucket = report.breakdown.find((b) => b.kind === "external_capability");
+    expect(modelBucket).toMatchObject({
+      provider: "openrouter",
+      model: "mock-model",
+      capabilityId: null,
+      inputTokens: 100,
+      outputTokens: 50,
+      quantity: null,
+      costUsd: 0.02,
+      factCount: 1,
+    });
+    expect(capBucket).toMatchObject({
+      provider: "mineru",
+      model: null,
+      capabilityId: "pdf_to_md_bundle",
+      unit: "pages",
+      quantity: 12,
+      inputTokens: 0,
+      outputTokens: 0,
+      costUsd: 0.015,
+      factCount: 1,
+    });
+
   });
 
   it("a run with no facts at all is runsWithoutCost and contributes nothing", async () => {
@@ -180,6 +206,8 @@ describe("usage rollup from UsageFact (ADR-0026)", () => {
     expect(row.projectId).toBe("proj-x");
     expect(row.runCount).toBe(1);
     expect(row.costUsd).toBeCloseTo(0.1, 8);
+    expect(row.breakdown).toHaveLength(1);
+    expect(row.breakdown[0]).toMatchObject({ kind: "model_completion", costUsd: 0.1, inputTokens: 1 });
   });
 
   it("returns an empty report for an org with no projects", async () => {
@@ -187,5 +215,7 @@ describe("usage rollup from UsageFact (ADR-0026)", () => {
     expect(report.projects).toHaveLength(0);
     expect(report.totals.runCount).toBe(0);
     expect(report.totals.costUsd).toBeNull();
+    expect(report.breakdown).toEqual([]);
+
   });
 });