Turn on noUnusedLocals, noImplicitReturns, importsNotUsedAsValues: error, and isolatedModules (#2777)

src/renderer/hooks/useMutationObserver.ts

@@ -44,5 +44,7 @@ export function useMutationObserver(
         observer.disconnect();
       };
     }
+
+    return undefined;
   }, [callback, options]);
 }

src/renderer/hooks/useStorage.ts

@@ -21,7 +21,7 @@
 
 import { useState } from "react";
 import { createStorage } from "../utils";
-import { CreateObservableOptions } from "mobx/lib/api/observable";
+import type { CreateObservableOptions } from "mobx/lib/api/observable";
 
 export function useStorage<T>(key: string, initialValue: T, options?: CreateObservableOptions) {
   const storage = createStorage(key, initialValue, options);