feat(cli): improve auth dialog UX with clearer three-option layout

- Replace nested API-KEY submenu with flat three-option layout
- Add descriptive labels for each authentication method:
  - Qwen OAuth: Free, up to 1,000 requests/day
  - Alibaba Cloud Coding Plan: Paid, multiple model providers
  - API Key: Bring your own API key
- Simplify region selection for Coding Plan (China vs Global)
- Use DescriptiveRadioButtonSelect for better visual hierarchy
- Add itemGap prop to BaseSelectionList for spacing
- Update i18n strings in en.js, zh.js, and ru.js
- Simplify custom API key configuration info view
- Clean up unused region-specific strings

Closes #2016

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

packages/cli/src/ui/hooks/useCodingPlanUpdates.test.ts

@@ -112,7 +112,7 @@ describe('useCodingPlanUpdates', () => {
 
       // Should prompt for China region since it defaults to China
       expect(result.current.codingPlanUpdateRequest?.prompt).toContain(
-        chinaConfig.regionName,
+        'Alibaba Cloud Coding Plan',
       );
     });
 
@@ -135,7 +135,7 @@ describe('useCodingPlanUpdates', () => {
       });
 
       expect(result.current.codingPlanUpdateRequest?.prompt).toContain(
-        chinaConfig.regionName,
+        'Alibaba Cloud Coding Plan',
       );
     });
 
@@ -158,7 +158,7 @@ describe('useCodingPlanUpdates', () => {
       });
 
       expect(result.current.codingPlanUpdateRequest?.prompt).toContain(
-        globalConfig.regionName,
+        'Alibaba Cloud Coding Plan',
       );
     });
   });
@@ -228,7 +228,7 @@ describe('useCodingPlanUpdates', () => {
       expect(mockAddItem).toHaveBeenCalledWith(
         expect.objectContaining({
           type: 'info',
-          text: expect.stringContaining(chinaConfig.regionName),
+          text: expect.stringContaining('Alibaba Cloud Coding Plan'),
         }),
         expect.any(Number),
       );
@@ -297,7 +297,7 @@ describe('useCodingPlanUpdates', () => {
       expect(mockAddItem).toHaveBeenCalledWith(
         expect.objectContaining({
           type: 'info',
-          text: expect.stringContaining(globalConfig.regionName),
+          text: expect.stringContaining('Alibaba Cloud Coding Plan'),
         }),
         expect.any(Number),
       );