实现了 TPV 的 pyi 生成逻辑（部分），删除了直接拷贝自 CPython（TPC） 版本的死代码

Test/App/circ_test.py

@@ -0,0 +1,66 @@
+import t, c
+import stdio
+import circ_a
+import circ_b
+
+
+# ============================================================
+# 循环引用测试入口
+#
+# 验证 A → B → A 的循环引用能正确编译和运行：
+# - Test 1: ClassA.MakeB() 创建 ClassB 实例
+# - Test 2: ClassB.MakeA() 创建 ClassA 实例
+# - Test 3: 值传递链 A(20) → B → A
+# ============================================================
+
+
+def circ_test() -> int:
+    stdio.printf("circ: === Test Start ===\n")
+
+    # ============================================================
+    # Test 1: 创建 ClassA，调用 MakeB 获取 ClassB 实例
+    # ============================================================
+    stdio.printf("circ: === Test 1: A.MakeB() ===\n")
+
+    a: circ_a.ClassA | t.CPtr = circ_a.ClassA(10)
+    av: int = a.GetValue()
+    stdio.printf("circ: a.GetValue()=%d (expected 10)\n", av)
+    if av != 10:
+        stdio.printf("[FAIL] a.GetValue()=%d expected 10\n", av)
+        return 1
+
+    b: circ_b.ClassB | t.CPtr = a.MakeB()
+    bv: int = b.GetValue()
+    stdio.printf("circ: b.GetValue()=%d (expected 10)\n", bv)
+    if bv != 10:
+        stdio.printf("[FAIL] b.GetValue()=%d expected 10\n", bv)
+        return 1
+
+    # ============================================================
+    # Test 2: 从 B 调用 MakeA 获取 ClassA 实例
+    # ============================================================
+    stdio.printf("circ: === Test 2: B.MakeA() ===\n")
+
+    a2: circ_a.ClassA | t.CPtr = b.MakeA()
+    av2: int = a2.GetValue()
+    stdio.printf("circ: a2.GetValue()=%d (expected 10)\n", av2)
+    if av2 != 10:
+        stdio.printf("[FAIL] a2.GetValue()=%d expected 10\n", av2)
+        return 1
+
+    # ============================================================
+    # Test 3: 值传递链 A(20) → B → A
+    # ============================================================
+    stdio.printf("circ: === Test 3: value chain A(20)->B->A ===\n")
+
+    a3: circ_a.ClassA | t.CPtr = circ_a.ClassA(20)
+    b3: circ_b.ClassB | t.CPtr = a3.MakeB()
+    a4: circ_a.ClassA | t.CPtr = b3.MakeA()
+    final: int = a4.GetValue()
+    stdio.printf("circ: final=%d (expected 20)\n", final)
+    if final != 20:
+        stdio.printf("[FAIL] final=%d expected 20\n", final)
+        return 1
+
+    stdio.printf("circ: === All Tests Passed ===\n")
+    return 0