fix: harden model catalog projections

backend/test/pi-provider-smoke.test.ts

@@ -300,11 +300,22 @@ test("provider smoke makes one configured request from an isolated no-capability
       });
     }
   });
+  const smokeModel: RuntimeModel = {
+    id: "zai/catalog-glm", provider: "zai", model: "catalog-glm", label: "GLM",
+    upstreamModel: "glm-5.2", authentication: { mode: "pi_auth" },
+    sessionAdapter: { mode: "pi_builtin" }, session: { reasoning: true },
+  };
+  const smokeCatalog: RuntimeModelCatalog = {
+    defaultSession: smokeModel.id, defaultMetadataGeneration: null, embedding: null,
+    sessionModels: () => [smokeModel], metadataModels: () => [],
+    hasSession: (id) => id === smokeModel.id,
+  };
   const smoke = createPiProviderSmoke(loadConfig({
     THT_HARNESS_DIR: "/app/harness",
     PI_BIN: "/usr/local/bin/pi",
     THT_DATA_ROOT: "/mounted-workflow-state",
   }), {
+    modelCatalog: smokeCatalog,
     spawnFn: (...args) => {
       spawns.push(args);
       expect(args[2].cwd).not.toBe("/app/harness");
@@ -324,7 +335,7 @@ test("provider smoke makes one configured request from an isolated no-capability
   });
 
   await expect(smoke({
-    provider: "zai", model: "glm-5.2", reasoning: "medium", timeoutMs: 750,
+    provider: "zai", model: "catalog-glm", reasoning: "medium", timeoutMs: 750,
   })).resolves.toBeUndefined();
   expect(spawns).toHaveLength(1);
   expect(spawns[0][0]).toBe("/usr/local/bin/pi");