feat(webui): forward generation overrides into run snapshots

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/app/api/conversations/[threadId]/runs/route.test.ts

@@ -342,4 +342,53 @@ describe("conversation run route", () => {
     );
     expect(snapshotCreations).toHaveLength(1);
   });
+
+  it("forwards generation overrides into the run snapshot request", async () => {
+    const deployment = scopedDeployment();
+    deployment.threadClient.threads.get.mockResolvedValue({
+      thread_id: "thread-a",
+      metadata: {
+        workspace_scope_id: "00000000-0000-4000-8000-000000000010",
+        model_selection: {
+          primary: { provider_id: "zhipu-glm", model_key: "glm-5.2" },
+          reasoning_effort: null,
+          temperature: 1.2,
+          top_p: 0.5,
+        },
+        model_selection_revision: 3,
+      },
+    });
+    mocks.getActiveDeployment.mockResolvedValue(deployment);
+
+    const request = new Request(
+      "http://localhost/api/conversations/thread-a/runs",
+      {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({
+          input: { messages: [{ type: "human", content: "hello" }] },
+        }),
+      }
+    );
+    const response = await routes.POST(
+      request as unknown as NextRequest,
+      context
+    );
+    expect(response.status).toBe(201);
+
+    const snapshotCall = mocks.configApiFetch.mock.calls.find(
+      ([, path, options]) =>
+        path === "/api/runtime-snapshots" &&
+        (options as { method?: string })?.method === "POST"
+    );
+    expect(snapshotCall).toBeDefined();
+    const body = (snapshotCall![2] as { body: Record<string, unknown> }).body;
+    expect(body).toMatchObject({
+      primary: { provider_id: "zhipu-glm", model_key: "glm-5.2" },
+      reasoning_effort: null,
+      temperature: 1.2,
+      top_p: 0.5,
+      model_selection_revision: 3,
+    });
+  });
 });

src/app/api/conversations/[threadId]/runs/route.ts

@@ -228,6 +228,14 @@ export async function POST(request: NextRequest, context: RouteContext) {
                 selectionRef === "inherit"
                   ? null
                   : (selectionRef.reasoning_effort ?? null),
+              temperature:
+                selectionRef === "inherit"
+                  ? null
+                  : (selectionRef.temperature ?? null),
+              top_p:
+                selectionRef === "inherit"
+                  ? null
+                  : (selectionRef.top_p ?? null),
             },
           }
         );