fix(server): get personal bests request mode2 should be optional

!nuf

backend/__tests__/api/controllers/user.spec.ts

@@ -2407,10 +2407,7 @@ describe("user controller test", () => {
       //THEN
       expect(body).toEqual({
         message: "Invalid query schema",
-        validationErrors: [
-          '"mode" Required',
-          '"mode2" Needs to be either a number, "zen" or "custom".',
-        ],
+        validationErrors: ['"mode" Required'],
       });
     });
     it("should fail with unknown query parameters", async () => {

packages/contracts/src/users.ts

@@ -89,7 +89,7 @@ export type UpdatePasswordRequest = z.infer<typeof UpdatePasswordRequestSchema>;
 
 export const GetPersonalBestsQuerySchema = z.object({
   mode: ModeSchema,
-  mode2: Mode2Schema,
+  mode2: Mode2Schema.optional(),
 });
 export type GetPersonalBestsQuery = z.infer<typeof GetPersonalBestsQuerySchema>;