chore(gen): c.CIf 家族移除报错覆盖 CElif/CElse/CEndif，注释口径统一为 cif

ExprGenName / CallGenDispatch 的「已删除拼写」守卫原本只认 CIf/CIfdef/CIfndef，现补齐 CElif/CElse/CEndif 六个（与 TPC 侧一致），报文同步；StmtGenCifMixin 的头注释、docstring 与状态注释把语句统一称作 cif，内部标记仍写作 c.@CIf 族。

App/lib/core/Gen/Call/CallGenDispatch.vp

@@ -232,9 +232,9 @@ novirtual class CallGenDispatch(CallGenBase.CallGenBase):
                 # it is evaluated there and never lowered as a runtime call.
                 self.Gen.TypeGenErr.fatal_error(cl, "defined(NAME) is only valid inside a cif/celif condition; it cannot be used in a normal expression", "NameError")
                 return None
-            if bare_nm.id is not None and (string.strcmp(bare_nm.id, "CIf") == 0 or string.strcmp(bare_nm.id, "CIfdef") == 0 or string.strcmp(bare_nm.id, "CIfndef") == 0):
-                # removed spellings (also covered for the bare-name form of c.CIf/c.CIfdef/c.CIfndef)
-                self.Gen.TypeGenErr.fatal_error(cl, "c.CIf/c.CIfdef/c.CIfndef were removed; use the cif/celif/celse statements and the defined(NAME) predicate instead (e.g. `cif defined(NAME):` ... `celse:` ...)", "NameError")
+            if bare_nm.id is not None and (string.strcmp(bare_nm.id, "CIf") == 0 or string.strcmp(bare_nm.id, "CIfdef") == 0 or string.strcmp(bare_nm.id, "CIfndef") == 0 or string.strcmp(bare_nm.id, "CElif") == 0 or string.strcmp(bare_nm.id, "CElse") == 0 or string.strcmp(bare_nm.id, "CEndif") == 0):
+                # removed spellings (also covered for the bare-name form of the c.CIf family)
+                self.Gen.TypeGenErr.fatal_error(cl, "c.CIf/c.CIfdef/c.CIfndef/c.CElif/c.CElse/c.CEndif were removed; use the cif/celif/celse statements and the defined(NAME) predicate instead (e.g. `cif defined(NAME):` ... `celse:` ...)", "NameError")
                 return None
             if bare_nm.id is not None and string.strcmp(bare_nm.id, "__asm__") == 0:
                 # translate_c_asm returns None for void output: set the hit flag so translate_call
@@ -278,10 +278,10 @@ novirtual class CallGenDispatch(CallGenBase.CallGenBase):
                     elif string.strcmp(func_name, "LInp") == 0 or string.strcmp(func_name, "LOut") == 0:
                         # c.LInp/c.LOut standalone calls return 0 (only meaningful in c.LLVMIR f-strings)
                         return mlirlite.ConstInt(pool, mlirlite.Int32(pool), 0, "0")
-                    elif string.strcmp(func_name, "CIf") == 0 or string.strcmp(func_name, "CIfdef") == 0 or string.strcmp(func_name, "CIfndef") == 0:
-                        # c.CIf/c.CIfdef/c.CIfndef were removed: report the replacement spelling.
+                    elif string.strcmp(func_name, "CIf") == 0 or string.strcmp(func_name, "CIfdef") == 0 or string.strcmp(func_name, "CIfndef") == 0 or string.strcmp(func_name, "CElif") == 0 or string.strcmp(func_name, "CElse") == 0 or string.strcmp(func_name, "CEndif") == 0:
+                        # The c.CIf-family spellings were removed: report the replacement.
                         # (There is no runtime fallback: compile-time conditions use cif/celif/celse.)
-                        self.Gen.TypeGenErr.fatal_error(cl, "c.CIf/c.CIfdef/c.CIfndef were removed; use the cif/celif/celse statements and the defined(NAME) predicate instead (e.g. `cif defined(NAME):` ... `celse:` ...)", "NameError")
+                        self.Gen.TypeGenErr.fatal_error(cl, "c.CIf/c.CIfdef/c.CIfndef/c.CElif/c.CElse/c.CEndif were removed; use the cif/celif/celse statements and the defined(NAME) predicate instead (e.g. `cif defined(NAME):` ... `celse:` ...)", "NameError")
                         return None
                     elif is_coro_mod != 0 and string.strcmp(func_name, "coro_run") == 0:
                         # coro.coro_run(frame): inline translation (resume loop until done, returns the ret slot).

App/lib/core/Gen/Expr/ExprGenName.vp

@@ -269,9 +269,9 @@ novirtual class ExprGenName(ExprGenBase.ExprGenBase):
         # All lookup paths failed: fail-fast (NameError) instead of returning None and crashing
         # downstream. Exempt keywords/builtins (self/pool/None/_) whose absence is normal.
         if nm_id is None: return None
-        if string.strcmp(nm_id, "CIf") == 0 or string.strcmp(nm_id, "CIfdef") == 0 or string.strcmp(nm_id, "CIfndef") == 0:
-            # The c.CIf/c.CIfdef/c.CIfndef spellings were removed; report the replacement.
-            self.Gen.TypeGenErr.fatal_error(node, "c.CIf/c.CIfdef/c.CIfndef were removed; use the cif/celif/celse statements and the defined(NAME) predicate instead (e.g. `cif defined(NAME):` ... `celse:` ...)", "NameError")
+        if string.strcmp(nm_id, "CIf") == 0 or string.strcmp(nm_id, "CIfdef") == 0 or string.strcmp(nm_id, "CIfndef") == 0 or string.strcmp(nm_id, "CElif") == 0 or string.strcmp(nm_id, "CElse") == 0 or string.strcmp(nm_id, "CEndif") == 0:
+            # The c.CIf-family spellings were removed; report the replacement.
+            self.Gen.TypeGenErr.fatal_error(node, "c.CIf/c.CIfdef/c.CIfndef/c.CElif/c.CElse/c.CEndif were removed; use the cif/celif/celse statements and the defined(NAME) predicate instead (e.g. `cif defined(NAME):` ... `celse:` ...)", "NameError")
             return None
         if string.strcmp(nm_id, "self") == 0 or string.strcmp(nm_id, "pool") == 0 or string.strcmp(nm_id, "true") == 0 or string.strcmp(nm_id, "false") == 0 or string.strcmp(nm_id, "None") == 0 or string.strcmp(nm_id, "match") == 0 or string.strcmp(nm_id, "_") == 0:
             return None

App/lib/core/Gen/Stmt/StmtGenCifMixin.vp

@@ -18,15 +18,15 @@ import lib.core.Gen.GenApi as GenApi
 
 
 # ============================================================
-# StmtGenCifMixin - compile-time CIf eval + NewXxxHandle factory
+# StmtGenCifMixin - compile-time cif eval + NewXxxHandle factory
 
 
 # ============================================================
-# StmtGenCifMixin - CIf eval + factory (lowest base class)
+# StmtGenCifMixin - cif eval + factory (lowest base class)
 novirtual class StmtGenCifMixin:
-    """Compile-time CIf evaluation and NewXxxHandle factory (lowest base class)."""
+    """Compile-time cif evaluation and NewXxxHandle factory (lowest base class)."""
 
-    # --- compile-time CIf eval state (was HandlesIf._g_cif_eval_ok) ---
+    # --- compile-time cif eval state (was HandlesIf._g_cif_eval_ok) ---
     # use 8-byte type: Mixin standalone and Generator composite layouts must align
     Gen: Generator.Generator*
     CifEvalOk: sizet
@@ -39,7 +39,7 @@ novirtual class StmtGenCifMixin:
     DiagStmtCount: int
 
     # ============================================================
-    # Cluster B: compile-time CIf macro eval (migrated from HandlesIf.vp)
+    # Cluster B: compile-time cif macro eval (migrated from HandlesIf.vp)
 
     def _is_cif_attr(self, attr: str) -> int:
         """Check the internal cif marker attribute name produced by the parser (c.@CIf family).
@@ -54,7 +54,7 @@ novirtual class StmtGenCifMixin:
         return 0
 
     def _is_cif_call(self, node: ast.AST*) -> int:
-        """Check whether test is a c.CIf-family call (or a bare CIf-family call)."""
+        """Check whether test is a cif marker call (c.@CIf family, or a bare @CIf-family name)."""
         if node is None or node.kind() != ast.ASTKind.Call: return 0
         cl: ast.Call* = ast.Call*(node)
         if cl.func is None: return 0