fix(httpapi): expose v2 session not found

packages/opencode/test/server/httpapi-exercise/index.ts

@@ -675,22 +675,14 @@ const scenarios: Scenario[] = [
       path: route("/api/session/{sessionID}/context", { sessionID: "ses_httpapi_missing" }),
       headers: ctx.headers(),
     }))
-    .json(200, array, "none"),
+    .json(404, object, "status"),
   http.protected
     .get("/api/session/{sessionID}/message", "v2.session.messages")
     .at((ctx) => ({
       path: route("/api/session/{sessionID}/message", { sessionID: "ses_httpapi_missing" }),
       headers: ctx.headers(),
     }))
-    .json(
-      200,
-      (body) => {
-        object(body)
-        array(body.items)
-        object(body.cursor)
-      },
-      "none",
-    ),
+    .json(404, object, "status"),
   http.protected
     .get("/api/session/{sessionID}/message", "v2.session.messages.params")
     .at((ctx) => ({
@@ -752,14 +744,14 @@ const scenarios: Scenario[] = [
       path: route("/api/session/{sessionID}/compact", { sessionID: "ses_httpapi_missing" }),
       headers: ctx.headers(),
     }))
-    .status(204, undefined, "none"),
+    .status(404, undefined, "status"),
   http.protected
     .post("/api/session/{sessionID}/wait", "v2.session.wait")
     .at((ctx) => ({
       path: route("/api/session/{sessionID}/wait", { sessionID: "ses_httpapi_missing" }),
       headers: ctx.headers(),
     }))
-    .status(204, undefined, "none"),
+    .status(404, undefined, "status"),
   http.protected
     .get("/session", "session.list")
     .seeded((ctx) => ctx.session({ title: "List me" }))