chore(dbg): 临时阶段日志定位 Phase A 崩溃点（定位后移除）

四个探针：PhaseA translating <path> / vpi.gen <rel_path> / TR.enter sha1 / TR.prelude.done。用于把崩溃点夹在 解析→vpi生成→模块前言→函数体翻译 四段之间。

App/lib/Phase/Phase2/__init__.vp

@@ -840,6 +840,8 @@ def RunMultiFileProject(mb: memhub.MemBuddy*, source_dir: str, temp_dir: str, ou
                     done_flags[i] = 1
                     completed_this_pass += 1
                     continue
+                # [TEMP dbg] 阶段日志：定位 Phase A 崩溃点（定位后移除）
+                VLogger.info(f"PhaseA translating: {ent.Path}", "PhaseA")
                 # Compute the package name (the directory part relative to source_dir)
                 src_dir_len_pa: sizet = string.strlen(source_dir)
                 pkg_pa: str = None

App/lib/Stub/StubGen/Converter.vp

@@ -661,6 +661,8 @@ def _PyiClass(buf: bytes, buf_size: sizet, pos: sizet, cls: ast.ClassDef*, inden
 # Returns bytes written (0 on failure); rel_path should be absolute for error attribution.
 def _GeneratePyiFromAst(mb: memhub.MemBuddy*, tree: ast.AST*, rel_path: str, buf: bytes, buf_size: sizet) -> sizet:
     """Generate .vpi stub content from an AST into buf"""
+    # [TEMP dbg] 阶段日志：进入 vpi 生成（定位崩溃点，定位后移除）
+    VLogger.info(f"vpi.gen: {rel_path}", "StubGen")
     if tree is None or buf is None or buf_size == 0: return 0
 
     # Error attribution: point "current file" at the file being stubbed. Callers must pass

App/lib/core/Gen/Translator.vp

@@ -381,6 +381,8 @@ novirtual class Translator:
         """Translate the AST into LLVM IR."""
         if tree is None: return 1
         if _mbuddy is None: return 1
+        # [TEMP dbg] 阶段日志：定位崩溃点（定位后移除）
+        VLogger.info(f"TR.enter sha1={self.ModuleSha1}", "TR")
 
         pool: memhub.MemBuddy* = _mbuddy
 
@@ -453,6 +455,8 @@ novirtual class Translator:
         # （现场：Test/NewLifetimeTest 未 import stdlib，拿不到 stdlib vpi 的 declare）。
         free_func: mlirlite.Function* = mlirlite.create_declare(decl_pool, mod, "free", void_ty_decl)
         if free_func is not None: mlirlite.add_param(decl_pool, free_func, i8_ptr_ty, "p")
+        # [TEMP dbg] 阶段日志：模块前言完成（定位崩溃点，定位后移除）
+        VLogger.info("TR.prelude.done", "TR")
 
         # Check whether the user defined a main function
         has_user_main: int = 0