fix(imports): NoneType 异常静默 + struct_body 判空，减少 WARN 干扰输出

编译大量输出 "HandlesImports: 忽略异常 'NoneType' object has no attribute 'endswith'"：注解/类型解析回退路径对 None 参与运算（数据缺失属正常兜底）——每文件每符号都打 WARN 淹没关键信息。

- 783/1166/1264 三处 except：AttributeError+NoneType 时静默不 WARN，其他异常保留
- 两处 is_packed 判断补 struct_body is not None 防护（源头防 None.startswith/endswith）

lib/core/Handles/HandlesImports.py

@@ -777,6 +777,8 @@ class ImportHandle(BaseHandle):
                                                         self._LoadModuleDeclarationsFromFile(sha1_pyi, Gen, module_name=alias.name, register_module_name=register_module_name, reexport_package=module_name)
                                                     has_functions_or_classes = True
                 except Exception as e:
+                    # NoneType 异常是数据缺失的正常兜底，静默不 WARN（干扰太多）
+                    if not (isinstance(e, AttributeError) and "'NoneType'" in str(e)):
                         if module_name == 'pyzlib':
                             node_type = type(node).__name__
                             name = getattr(node, 'name', getattr(node, 'attr', '?'))
@@ -1163,6 +1165,9 @@ class ImportHandle(BaseHandle):
                     ReturnTypeInfo.BaseType = t.CInt()
                 IsPtr = ReturnTypeInfo.IsPtr
             except Exception as e:  # 回退：返回类型解析失败时使用默认 CInt
+                # NoneType 异常（如对 None 调 endswith）是数据缺失的正常兜底场景，
+                # 静默不输出 WARN（干扰太多）；其他异常保留提示。
+                if not (isinstance(e, AttributeError) and "'NoneType'" in str(e)):
                     _vlog().warning(f"HandlesImports: 忽略异常 {e}", exc_info=e)
                 ReturnTypeInfo = CTypeInfo()
                 ReturnTypeInfo.BaseType = t.CInt()
@@ -1261,6 +1266,8 @@ class ImportHandle(BaseHandle):
                         ParamTypeInfo.PtrCount = max(ParamTypeInfo.PtrCount, 1)
                     ParamType = Gen._ctype_to_llvm(ParamTypeInfo)
                 except Exception as e:  # 回退：参数类型解析失败时使用默认 i32
+                    # NoneType 异常是数据缺失的正常兜底，静默不 WARN（干扰太多）
+                    if not (isinstance(e, AttributeError) and "'NoneType'" in str(e)):
                         _vlog().warning(f"HandlesImports: 忽略异常 {e}", exc_info=e)
                     ParamType = ir.IntType(32)
                 if isinstance(ParamType, ir.VoidType) or (isinstance(ParamType, ir.PointerType) and isinstance(ParamType.pointee, ir.VoidType)):
@@ -2109,7 +2116,7 @@ class ImportHandle(BaseHandle):
             if len(parts[0]) == 16 and all(c in '0123456789abcdef' for c in parts[0]):
                 actual_sha1 = parts[0]
 
-        is_packed = struct_body.startswith('<{') and struct_body.endswith('}>')
+        is_packed = struct_body is not None and struct_body.startswith('<{') and struct_body.endswith('}>')
         if struct_body and struct_body != 'opaque':
             elem_types = []
             if is_packed:
@@ -2461,7 +2468,7 @@ class ImportHandle(BaseHandle):
                             struct_body = struct_def_match.group(3).strip()
                             if struct_body and struct_body != 'opaque':
                                 elem_types = []
-                                is_packed = struct_body.startswith('<{') and struct_body.endswith('}>')
+                                is_packed = struct_body is not None and struct_body.startswith('<{') and struct_body.endswith('}>')
                                 if is_packed:
                                     inner = struct_body[2:-1].strip()
                                 else: