refactor(stub): 移除 t./c. 前缀剥离兼容

c.* 退役后 stub 生成不再特殊处理 t./c. 前缀，按普通属性名输出。

lib/StubGen/Converter.py

@@ -751,8 +751,6 @@ class PythonToStubConverter:
             return _STUB_TYPE_ALIASES.get(annotation.id, annotation.id)
         elif isinstance(annotation, ast.Attribute):
             if isinstance(annotation.value, ast.Name):
-                if annotation.value.id in ('t', 'c'):
-                    return _STUB_TYPE_ALIASES.get(annotation.attr, annotation.attr)
                 return f'{annotation.value.id}.{annotation.attr}'
             else:
                 # 处理嵌套属性访问，如 attr.packed
@@ -1010,9 +1008,6 @@ class PythonToStubConverter:
             return decorator.id
         elif isinstance(decorator, ast.Attribute):
             if isinstance(decorator.value, ast.Name):
-                # 旧 `t.X` / `c.X` 前缀只作输入兼容：stub 输出按裸名书写。
-                if decorator.value.id in ('t', 'c'):
-                    return decorator.attr
                 return f'{decorator.value.id}.{decorator.attr}'
             return decorator.attr
         elif isinstance(decorator, ast.Call):