refactor: loginManually takes promptLogin

src/app.ts

@@ -263,9 +263,20 @@ export class App {
   }
   async run() {
     await this.profile.readState();
+    const { logger, readline, newFetcher } = this.env;
 
     if (!this.profile.state.loginState?.sessionToken) {
-      const sessionToken = await loginManually(this.env);
+      const sessionToken = await loginManually({
+        newFetcher,
+        promptLogin: async (url: string) => {
+          logger.log("Navigate to this URL in your browser:");
+          logger.log(url);
+          logger.log(
+            'Log in, right click the "Select this account" button, copy the link address, and paste it below:',
+          );
+          return await readline();
+        },
+      });
 
       await this.profile.writeState({
         ...this.profile.state,

src/iksm.ts

@@ -9,7 +9,10 @@ import { APIError } from "./APIError.ts";
 import { Env, Fetcher } from "./env.ts";
 
 export async function loginManually(
-  { logger, readline, newFetcher }: Env,
+  { newFetcher, promptLogin }: {
+    newFetcher: () => Fetcher;
+    promptLogin: (url: string) => Promise<string>;
+  },
 ): Promise<string> {
   const fetch = newFetcher();
 
@@ -52,13 +55,7 @@ export async function loginManually(
     },
   );
 
-  logger.log("Navigate to this URL in your browser:");
+  const login = (await promptLogin(res.url)).trim();
-  logger.log(res.url);
-  logger.log(
-    'Log in, right click the "Select this account" button, copy the link address, and paste it below:',
-  );
-
-  const login = (await readline()).trim();
   if (!login) {
     throw new Error("No login URL provided");
   }