refactor: rename agent widget references to AI agent for consistency

- Updated runtime configuration to use __CS_AI_AGENT_WIDGET_CONFIG__ instead of __CS_AGENT_WIDGET_CONFIG__.
- Changed message types in support host bridge from "cs-agent" to "cs-ai-agent".
- Minified SDK script updated to reflect new AI agent naming conventions.
- Adjusted scrollbar styles in main.scss to use .cs-ai-agent-scrollbar instead of .cs-agent-scrollbar.

cmd/testdata/README_AGENTTEAM.md

@@ -95,7 +95,7 @@ AuditFields{
 运行所有测试数据初始化：
 
 ```bash
-cd cs-agent
+cd cs-ai-agent
 go run cmd/testdata/main.go -config config/config.yaml
 # 或使用 -yes 标志跳过确认
 go run cmd/testdata/main.go -config config/config.yaml -yes