refactor: remove now-unused region threading in help printing

After dropping the API Reference line, printCommandHelp no longer reads
region, so the --region/DASHSCOPE_REGION resolution done solely for help
output is dead code. Endpoint selection via loadConfig is untouched.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: XXPermanentXX

packages/cli/src/main.ts

@@ -3,11 +3,9 @@ import { registry } from "./registry.ts";
 import {
   GLOBAL_OPTIONS,
   loadConfig,
-  readConfigFile,
   resolveCredential,
   trackCommandExecution,
   flushTelemetry,
-  type Region,
 } from "bailian-cli-core";
 import { ensureApiKey } from "./utils/ensure-key.ts";
 import { handleError } from "./error-handler.ts";
@@ -22,13 +20,7 @@ import {
 } from "./utils/command-help.ts";
 
 registerCommandHelpPrinter((commandPath, out) => {
-  const a = process.argv.slice(2);
-  const ri = a.indexOf("--region");
-  const region = ((ri >= 0 && a[ri + 1]) ||
-    process.env.DASHSCOPE_REGION ||
-    readConfigFile().region ||
-    "cn") as Region;
-  registry.printHelp(commandPath, out, region);
+  registry.printHelp(commandPath, out);
 });
 
 // 优雅处理 Ctrl+C
@@ -84,12 +76,7 @@ async function main() {
   const commandPath = scanCommandPath(argv, GLOBAL_OPTIONS);
 
   if (argv.includes("--help") || argv.includes("-h")) {
-    const ri = argv.indexOf("--region");
-    const region = ((ri >= 0 && argv[ri + 1]) ||
-      process.env.DASHSCOPE_REGION ||
-      readConfigFile().region ||
-      "cn") as Region;
-    registry.printHelp(commandPath, process.stderr, region);
+    registry.printHelp(commandPath, process.stderr);
     process.exit(0);
   }
 
@@ -115,12 +102,7 @@ async function main() {
 
   // 组路径（例如 `bl speech` 未接子命令）：展示帮助后干净退出
   if (registry.isGroupPath(commandPath)) {
-    const ri = argv.indexOf("--region");
-    const region = ((ri >= 0 && argv[ri + 1]) ||
-      process.env.DASHSCOPE_REGION ||
-      readConfigFile().region ||
-      "cn") as Region;
-    registry.printHelp(commandPath, process.stderr, region);
+    registry.printHelp(commandPath, process.stderr);
     process.exit(0);
   }
 

packages/cli/src/registry.ts

@@ -1,7 +1,7 @@
 import type { Command } from "bailian-cli-core";
 import { BailianError } from "bailian-cli-core";
 import { ExitCode } from "bailian-cli-core";
-import { GLOBAL_OPTIONS, type Region } from "bailian-cli-core";
+import { GLOBAL_OPTIONS } from "bailian-cli-core";
 import { commands } from "./commands/catalog.ts";
 
 export type { Command, OptionDef } from "bailian-cli-core";
@@ -133,11 +133,7 @@ class CommandRegistry {
     out.isTTY ? `\x1b[38;2;59;130;246m${s}\x1b[0m` : s;
   private dim = (s: string, out: NodeJS.WriteStream) => (out.isTTY ? `\x1b[2m${s}\x1b[0m` : s);
 
-  printHelp(
-    commandPath: string[],
-    out: NodeJS.WriteStream = process.stdout,
-    region: Region = "cn",
-  ): void {
+  printHelp(commandPath: string[], out: NodeJS.WriteStream = process.stdout): void {
     if (commandPath.length === 0) {
       this.printRootHelp(out);
       return;
@@ -154,7 +150,7 @@ class CommandRegistry {
     }
 
     if (node.command) {
-      this.printCommandHelp(node.command, out, region);
+      this.printCommandHelp(node.command, out);
       return;
     }
 
@@ -233,7 +229,7 @@ ${b("Getting Help:")}
 `);
   }
 
-  private printCommandHelp(cmd: Command, out: NodeJS.WriteStream, region: Region = "cn"): void {
+  private printCommandHelp(cmd: Command, out: NodeJS.WriteStream): void {
     const b = (s: string) => this.bold(s, out);
     const a = (s: string) => this.accent(s, out);
     const d = (s: string) => this.dim(s, out);