refactor(tpv): 删除 Handles 目录，核心逻辑合并进 Gen

- 新建 Gen/Translator.vp：Translator 类 + Mixin + 常量 + _mbuddy 自 HandlesTranslator 迁入（删 7 个委托壳与 _g_gen）

- GenApi 下沉 7 个 global/nonlocal 管理委托（add/is_global_name、add/is_nonlocal_name、get_nonlocal_type/index、clear_scope_names）+ update_global_func_typestr

- CallGenLeafKit 并入 ExprCallHandle 类，NewExprCallHandle 改本地引用

- 删除 Handles/HandlesExpr/ExprCallTable/HandlesBase（60+ 委托零消费者/纯委托壳）与 Handles 目录整体

- 全 App 56 文件 import 改指 lib.core.Gen.*，清理死 import，委托调用改 GenApi，main/BuildPipeline _g_gen 注入删除

App/lib/Phase/BuildPipeline.vp

@@ -16,9 +16,7 @@ import subprocess
 import viperlib
 import ast
 import lib.core.VLogger as VLogger
-import lib.core.Handles.HandlesTranslator as HandlesTranslator
-import lib.core.Handles.HandlesExpr as HandlesExpr
-import lib.core.Handles.HandlesExprCall as HandlesExprCall
+import lib.core.Gen.Translator as HandlesTranslator
 import lib.Stub.StubMerger as StubMerger
 import lib.Stub.StubGen.Converter as StubConverter
 import lib.Projectrans.Config as Config
@@ -154,9 +152,6 @@ def TranslateFileGetTrans(mb: memhub.MemBuddy | t.CPtr, file_path: str,
     # P2-P5: 注入各 Handles 模块级单例（委托函数经本地 _g_gen 访问，
     # 避免函数体 import 包模块与类/模块名歧义）
     GenApi._g_gen = gen
-    HandlesTranslator._g_gen = gen
-    HandlesExpr._g_gen = gen
-    HandlesExprCall._g_gen = gen
     # P6: 注入语句/赋值/变量/导入/翻译驱动模块的单例
     # 设置当前文件名（供报错使用）
     GenApi.set_current_file_type(file_path)

App/lib/Phase/Phase1/Phase1Main.vp

@@ -9,8 +9,7 @@ import w32.win32base
 import ast
 import llvmlite
 import lib.core.VLogger as VLogger
-import lib.core.Handles.HandlesTranslator as HandlesTranslator
-import lib.core.Handles.HandlesExprCall as HandlesExprCall
+import lib.core.Gen.Translator as HandlesTranslator
 import lib.core.IncludesScanner as IncludesScanner
 import lib.Stub.StubMerger as StubMerger
 import lib.core.Gen.Generator as GenGenerator

App/lib/Phase/Phase1/Phase1Scan.vp

@@ -11,8 +11,7 @@ import w32.win32base
 import ast
 import llvmlite
 import lib.core.VLogger as VLogger
-import lib.core.Handles.HandlesTranslator as HandlesTranslator
-import lib.core.Handles.HandlesExprCall as HandlesExprCall
+import lib.core.Gen.Translator as HandlesTranslator
 import lib.core.IncludesScanner as IncludesScanner
 import lib.Stub.StubMerger as StubMerger
 import lib.core.Gen.Generator as GenGenerator

App/lib/Phase/Phase1/Phase1Topo.vp

@@ -10,8 +10,7 @@ import w32.win32base
 import ast
 import llvmlite
 import lib.core.VLogger as VLogger
-import lib.core.Handles.HandlesTranslator as HandlesTranslator
-import lib.core.Handles.HandlesExprCall as HandlesExprCall
+import lib.core.Gen.Translator as HandlesTranslator
 import lib.core.IncludesScanner as IncludesScanner
 import lib.Stub.StubMerger as StubMerger
 import lib.core.Gen.Generator as GenGenerator

App/lib/Phase/Phase2/__init__.vp

@@ -15,8 +15,7 @@ import llvmlite
 import subprocess
 import argparse
 import lib.core.VLogger as VLogger
-import lib.core.Handles.HandlesTranslator as HandlesTranslator
-import lib.core.Handles.HandlesExprCall as HandlesExprCall
+import lib.core.Gen.Translator as HandlesTranslator
 import lib.Phase.BuildPipeline as BuildPipeline
 import lib.core.IncludesScanner as IncludesScanner
 import lib.core.CompilerFactory as CompilerFactory