fix(stub): .vpi 保留 typedef 声明

typedef 变量输出为 typedef NAME = 类型，避免生成 NAME: 类型 = 类型 导致加载端不再把 NAME 当类型别名。

lib/StubGen/Converter.py

@@ -581,9 +581,10 @@ class PythonToStubConverter:
             # 非宏变量：不加 State
             # 含有 typedef 的变量不加 extern，普通变量需要加 extern
             has_typedef: bool = 'CTypedef' in TypeStr or 'typedef' in Markers
-            if has_typedef and node.value is not None:
-                ValueTypeStr: str = PythonToStubConverter._GetTypeString(node.value)
-                lines.append(f'{VarName}: {TypeStr} = {ValueTypeStr}')
+            if has_typedef:
+                ValueNode: ast.AST | None = node.value if node.value is not None else node.annotation
+                ValueTypeStr: str = PythonToStubConverter._GetTypeString(ValueNode)
+                lines.append(f'typedef {VarName} = {ValueTypeStr}')
             elif 'extern' in Markers:
                 lines.append(f'extern {VarName}: {TypeStr}')
             elif 'static' in Markers: