feat(auth): add --base-url flag to bl auth login

When used with --api-key, validates the key against the specified
base URL and persists it to config.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: lishengzxc

packages/cli/src/commands/auth/login.ts

@@ -85,6 +85,10 @@ export default defineCommand({
   usage: "bl auth login --api-key <key> | bl auth login --console",
   options: [
     { flag: "--api-key <key>", description: "DashScope API key to store" },
+    {
+      flag: "--base-url <url>",
+      description: "DashScope API base URL (used with --api-key for validation)",
+    },
     {
       flag: "--console",
       description: "Sign in via browser; opens the console login URL in your default browser",
@@ -130,8 +134,16 @@ export default defineCommand({
       process.exit(0);
     }
 
+    const baseUrl = (flags.baseUrl as string) || undefined;
+    const effectiveConfig = baseUrl ? { ...config, baseUrl } : config;
+
     if (!config.dryRun) {
-      await validateKeyAndPersist(config, key);
+      await validateKeyAndPersist(effectiveConfig, key);
+      if (baseUrl) {
+        const existing = readConfigFile() as Record<string, unknown>;
+        existing.base_url = baseUrl;
+        await writeConfigFile(existing);
+      }
       printQuickStart();
     } else {
       emitBare("Would validate and save API key.");

skills/bailian-cli/reference/auth.md

@@ -25,10 +25,11 @@ Index: [index.md](index.md)
 
 #### Options
 
-| Flag              | Type    | Required | Description                                                              |
-| ----------------- | ------- | -------- | ------------------------------------------------------------------------ |
-| `--api-key <key>` | string  | no       | DashScope API key to store                                               |
-| `--console`       | boolean | no       | Sign in via browser; opens the console login URL in your default browser |
+| Flag               | Type    | Required | Description                                                              |
+| ------------------ | ------- | -------- | ------------------------------------------------------------------------ |
+| `--api-key <key>`  | string  | no       | DashScope API key to store                                               |
+| `--base-url <url>` | string  | no       | DashScope API base URL (used with --api-key for validation)              |
+| `--console`        | boolean | no       | Sign in via browser; opens the console login URL in your default browser |
 
 #### Examples