feat(viperbuild): 新增 proj.clean.all 总开关

- ViperBuild：clean.all 布尔字段 + CleanAll() 读取口

- main.vp：all 并入 build_dir / includes（个体字段写 False 无法关闭），等价整根清理 + includes 缓存

App/lib/core/builtin/ViperBuild.vp

@@ -66,6 +66,7 @@ _c_has_build: int = 0
 _c_adv_asan: int = 0
 _c_adv_traceback: int = 0
 # proj.clean.* 细粒度清理（等价 --clean 的子集；build_dir = 整个 __vpcbuild__）
+_c_clean_all: int = 0
 _c_clean_output: int = 0
 _c_clean_temp: int = 0
 _c_clean_build_dir: int = 0
@@ -679,12 +680,15 @@ def _SetAdvancedField(fname: str, vnode: ast.AST*) -> int:
 
 def _SetCleanField(fname: str, vnode: ast.AST*) -> int:
     """Apply proj.clean.<fname> = <bool constant>; 0=success."""
-    global _c_clean_output, _c_clean_temp, _c_clean_build_dir, _c_clean_includes
+    global _c_clean_all, _c_clean_output, _c_clean_temp, _c_clean_build_dir, _c_clean_includes
     if fname is None or vnode is None: return 1
     b: int = _EvalBool(vnode)
     if b < 0:
         VLogger.error(f"viperbuild: proj.clean.{fname} must be a boolean constant (True/False)", "viperbuild")
         return 1
+    if string.strcmp(fname, "all") == 0:
+        _c_clean_all = b
+        return 0
     if string.strcmp(fname, "output") == 0:
         _c_clean_output = b
         return 0
@@ -697,7 +701,7 @@ def _SetCleanField(fname: str, vnode: ast.AST*) -> int:
     if string.strcmp(fname, "includes") == 0:
         _c_clean_includes = b
         return 0
-    VLogger.error(f"viperbuild: unknown field proj.clean.{fname} (supported: output / temp / build_dir / includes)", "viperbuild")
+    VLogger.error(f"viperbuild: unknown field proj.clean.{fname} (supported: all / output / temp / build_dir / includes)", "viperbuild")
     return 1
 
 
@@ -1195,7 +1199,7 @@ def _ResetAll() -> None:
     global _c_compiler, _c_linker, _c_static_libs, _c_dynamic_libs, _c_output
     global _c_triple, _c_datalayout, _c_selfmachine, _c_has_project, _c_has_build
     global _c_adv_asan, _c_adv_traceback
-    global _c_clean_output, _c_clean_temp, _c_clean_build_dir, _c_clean_includes
+    global _c_clean_all, _c_clean_output, _c_clean_temp, _c_clean_build_dir, _c_clean_includes
     global _c_run, _c_run_args
     global _saw_viperbuild
     _alias = None
@@ -1222,6 +1226,7 @@ def _ResetAll() -> None:
     _c_has_build = 0
     _c_adv_asan = 0
     _c_adv_traceback = 0
+    _c_clean_all = 0
     _c_clean_output = 0
     _c_clean_temp = 0
     _c_clean_build_dir = 0
@@ -1304,6 +1309,11 @@ def AdvancedTraceback() -> int:
     return _c_adv_traceback
 
 
+def CleanAll() -> int:
+    """Whether viperbuild requested a full clean (proj.clean.all: buildroot + includes); 1=yes / 0=no."""
+    return _c_clean_all
+
+
 def CleanOutput() -> int:
     """Whether viperbuild requested cleaning the output dir (proj.clean.output); 1=yes / 0=no."""
     return _c_clean_output

App/main.vp

@@ -456,10 +456,13 @@ Target: %s
     # build_dir 指整个构建根（缺省 {source}/__vpcbuild__，含 temp + output），优先级高于
     # 单列的 temp/output。--clean 已覆盖全部目录时跳过，避免重复删除与重复日志。
     if src is not None and _gb_clean == False:
-        c_build_dir: bool = ViperBuild.CleanBuildDir() != 0
-        c_temp: bool = ViperBuild.CleanTemp() != 0
-        c_output: bool = ViperBuild.CleanOutput() != 0
-        c_includes: bool = ViperBuild.CleanIncludes() != 0
+        # clean.all 是总开关：等价于 build_dir + includes（temp/output 已被 build_dir 覆盖），
+        # 个体开关写 False 不能关掉它。
+        c_all: bool = ViperBuild.CleanAll() != 0
+        c_build_dir: bool = c_all or ViperBuild.CleanBuildDir() != 0
+        c_temp: bool = c_all or ViperBuild.CleanTemp() != 0
+        c_output: bool = c_all or ViperBuild.CleanOutput() != 0
+        c_includes: bool = c_all or ViperBuild.CleanIncludes() != 0
         if c_build_dir:
             if Config.BuildDir is not None:
                 n_cb: int = Utils.CleanDir(Config.BuildDir)