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

src/renderer/components/+extensions/extension-install.store.ts

@@ -21,7 +21,8 @@
 
 import { action, computed, observable } from "mobx";
 import logger from "../../../main/logger";
-import { disposer, ExtendableDisposer } from "../../utils";
+import { disposer } from "../../utils";
+import type { ExtendableDisposer } from "../../utils";
 import * as uuid from "uuid";
 import { broadcastMessage } from "../../../common/ipc";
 import { ipcRenderer } from "electron";

src/renderer/components/+extensions/extensions.route.ts

@@ -19,7 +19,7 @@
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-import { RouteProps } from "react-router";
+import type { RouteProps } from "react-router";
 import { buildURL } from "../../../common/utils/buildUrl";
 
 export const extensionsRoute: RouteProps = {

src/renderer/components/+extensions/extensions.tsx

@@ -199,7 +199,7 @@ async function createTempFilesAndValidate({ fileName, dataP }: InstallRequest):
     const data = await dataP;
 
     if (!data) {
-      return;
+      return null;
     }
 
     await fse.writeFile(tempFile, data);