Test quak login and backup-metadata --exif (closes #110)

loginCommand now takes its login function and prompts from CliContext;
bin/quak.ts passes Client.login and the terminal prompts, so behaviour is
unchanged. Tests cover a login from QUAK_EMAIL/QUAK_PASSWORD with no
prompt, the TOTP prompt, a failed login, and the saved session's modes,
and show that --exif and --all each turn on EXIF extraction. Also rewraps
the header comment of src/cli-commands.ts.

Model: opus-5-5

src/cli-commands.ts

@@ -4,10 +4,8 @@
 // code; a thrown error is left to the caller. Nothing here calls
 // `process.exit`: `bin/quak.ts` wires these to the command line, and `run` in
 // `cli-run.ts` prints a thrown error as one line and exits once output has
-// drained. Output must stay byte-identical
-// (see `cli-output.ts`).
+// drained. Output must stay byte-identical (see `cli-output.ts`).
 
-import { input, password as passwordPrompt } from "@inquirer/prompts";
 import {
     copyFileSync,
     existsSync,
@@ -16,7 +14,11 @@ import {
     writeFileSync,
 } from "node:fs";
 import { join } from "node:path";
-import { Client, type ClientSnapshot } from "./client.js";
+import {
+    type Client,
+    type ClientSnapshot,
+    type LoginOptions,
+} from "./client.js";
 import { init } from "./crypto/index.js";
 import {
     defaultCacheDirectory,
@@ -44,6 +46,12 @@ export interface CliContext {
     // Reads the session file into a client, or null when there is none. The
     // CLI passes `loadSession` from `cli-session.ts`; tests pass a fake client.
     loadSession: (path: string) => Client | null;
+    // Used by `login` only. The CLI passes `Client.login` and terminal
+    // prompts; tests pass fakes.
+    login: (opts: LoginOptions) => Promise<Client>;
+    prompt: (message: string) => Promise<string>;
+    // Like `prompt`, but the answer is masked as it is typed.
+    promptSecret: (message: string) => Promise<string>;
 }
 
 const sessionPath = (ctx: CliContext): string =>
@@ -109,24 +117,19 @@ const openReadLibrary = (ctx: CliContext, client: Client): Promise<Library> =>
         precacheOriginals: false,
     });
 
-const prompt = async (message: string): Promise<string> => input({ message });
-
-const promptSecret = async (message: string): Promise<string> =>
-    passwordPrompt({ message, mask: true });
-
 export const loginCommand = async (ctx: CliContext): Promise<number> => {
     await init();
-    const email = process.env.QUAK_EMAIL ?? (await prompt("Email"));
+    const email = process.env.QUAK_EMAIL ?? (await ctx.prompt("Email"));
     const password =
-        process.env.QUAK_PASSWORD ?? (await promptSecret("Password"));
+        process.env.QUAK_PASSWORD ?? (await ctx.promptSecret("Password"));
 
     ctx.stderr.write("Authenticating...\n");
     try {
-        const client = await Client.login({
+        const client = await ctx.login({
             email,
             password,
-            totp: async () => prompt("TOTP code: "),
-            emailOTP: async () => prompt("Email verification code: "),
+            totp: async () => ctx.prompt("TOTP code: "),
+            emailOTP: async () => ctx.prompt("Email verification code: "),
         });
 
         saveSession(ctx.sessionDir, client.toJSON());