修复了一些错误

hashtable.vp

@@ -51,14 +51,14 @@ class HashTable:
     __count__:      t.CSizeT = 0                  # Number of occupied entries
     __capacity__:   t.CSizeT = 16                 # Total slot count (power of two)
     __tombstones__: t.CSizeT = 0                  # Tombstone entry count
-    __mbuddy__:     memhub.MemBuddy | t.CPtr
+    __mbuddy__:     rawptr[memhub.MemBuddy]
     __iter_index__: t.CSizeT = 0
 
-    def __new__(self, mb: memhub.MemBuddy | t.CPtr) -> t.CPtr:
+    def __new__(self, mb: rawptr[memhub.MemBuddy]) -> t.CPtr:
         # Heap-allocate HashTable object (6 fields × 8 bytes = 48 bytes)
         return mb.alloc(48)
 
-    def __init__(self, mb: memhub.MemBuddy | t.CPtr):
+    def __init__(self, mb: rawptr[memhub.MemBuddy]):
         self.__mbuddy__ = mb
         self.__capacity__ = _HT_INIT_CAP
         self.__count__ = 0