core: fix type annotations

packages/hydrooj/src/interface.ts

@@ -736,7 +736,7 @@ export interface HydroGlobal {
     error: typeof import('./error');
     Logger: typeof import('./logger').Logger;
     logger: typeof import('./logger').logger;
-    locales: Record<string, Record<string, string> | Record<symbol, Record<string, string>>>;
+    locales: Record<string, Record<string, string> & Record<symbol, Record<string, string>>>;
 }
 
 declare global {

packages/hydrooj/src/lib/i18n.ts

@@ -68,6 +68,9 @@ global.Hydro.locales = new Proxy(translations, {
                 for (let i = s.length - 1; i; i--) Object.assign(result, s[i]);
                 return result;
             },
+            has(s, key: string) {
+                return !!s.find((i) => !!i[key]);
+            },
         });
     },
 }) as any;