This is a breaking change that renames the entire project from "Carrot BBS" to "WithYou".

The Go module name has been changed from `carrot_bbs` to `with_you`, which requires
all import paths to be updated throughout the codebase and by external consumers.

BREAKING CHANGE: Module name changed from carrot_bbs to with_you. All imports
and dependencies must be updated from carrot_bbs/* to with_you/*.

internal/dto/message_converter.go

@@ -1,7 +1,7 @@
-package dto
+package dto
 
 import (
-	"carrot_bbs/internal/model"
+	"with_you/internal/model"
 )
 
 // ==================== Message 转换 ====================