phase: 20.49 COMPLETE; 20.50 Flow+String minimal reps; 20.51 selfhost v0/v1 minimal (Option A/B); hv1-inline binop/unop/copy; docs + run_all + CURRENT_TASK -> 21.0

local_tests/test_array_box_simple.hako

@@ -0,0 +1,20 @@
+// 🧪 ArrayBoxの簡単なテスト
+
+print("=== ArrayBox Simple Test ===")
+local arr
+arr = new ArrayBox()
+
+// 基本的な操作
+arr.push("Hello")
+arr.push("World")
+print("Length: " + arr.length())
+print("Get 0: " + arr.get(0))
+print("Get 1: " + arr.get(1))
+
+// pop
+local item
+item = arr.pop()
+print("Popped: " + item)
+print("Length after pop: " + arr.length())
+
+print("Test completed!")