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.

internal/ai/mcps/server.go

@@ -20,7 +20,7 @@ func NewHTTPHandler() http.Handler {
 
 func newServer() *mcp.Server {
 	server := mcp.NewServer(&mcp.Implementation{
-		Name:       "cs-agent-mcp-server",
+		Name:       "cs-ai-agent-mcp-server",
 		Title:      "CS Agent MCP Server",
 		Version:    "v1",
 		WebsiteURL: "https://github.com/modelcontextprotocol",