refactor: fix types

packages/backend/src/server/ActivityPubServerService.ts

@@ -540,6 +540,7 @@ export class ActivityPubServerService {
 				return (this.apRendererService.renderActivity(this.apRendererService.renderKey(user, keypair)));
 			} else {
 				reply.code(400);
+				return;
 			}
 		});
 

packages/backend/src/server/api/SignupApiService.ts

@@ -146,6 +146,7 @@ export class SignupApiService {
 				`To complete signup, please click this link: ${link}`);
 	
 			reply.code(204);
+			return;
 		} else {
 			try {
 				const { account, secret } = await this.signupService.signup({

packages/backend/src/server/web/ClientServerService.ts

@@ -372,6 +372,7 @@ export class ClientServerService {
 				return feed.atom1();
 			} else {
 				reply.code(404);
+				return;
 			}
 		});
 
@@ -384,6 +385,7 @@ export class ClientServerService {
 				return feed.rss2();
 			} else {
 				reply.code(404);
+				return;
 			}
 		});
 
@@ -396,6 +398,7 @@ export class ClientServerService {
 				return feed.json1();
 			} else {
 				reply.code(404);
+				return;
 			}
 		});