test(match): 补 break 跳出 match 与 fallthrough 回归用例

- MatchCaseBreakTest：循环内 match 的 case 写 break 只跳出 match（limit=5 ⇒ 117）
- MatchCaseFallthroughTest：`fallthrough` 落到下一个 case（value=1/2/3/9 ⇒ 6/5/3/77）
- main.vp 注册上述 5 个断言

LogicFlowTest/App/logic_test.vp

@@ -369,4 +369,44 @@ def ForWithCaseNoBreakNested(inner_limit: t.CInt):
                 case _:
                     result += 3
             c.NoBreak
-    print("Nested NoBreak result: ", result)
+    print("Nested NoBreak result: ", result)
+
+
+# ============================================================
+# match case 内 break = 跳出 match（C switch 语义），**不**跳出外层循环
+# 期望 limit=5：i=0 走 _ (+0)、i=1 走 case 1 (+100) 后 break 出 match（循环继续）、
+#              i=2 走 case 2 (+10)、i=3 (+3)、i=4 (+4) ⇒ 117
+# ============================================================
+def MatchCaseBreakTest(limit: t.CInt) -> t.CInt:
+    i: t.CInt = 0
+    result: t.CInt = 0
+    for i in range(limit):
+        match i:
+            case 1:
+                result += 100
+                break
+            case 2:
+                result += 10
+            case _:
+                result += i
+    return result
+
+
+# ============================================================
+# fallthrough：case 体末尾写 `fallthrough` 则不自动 break，落到下一个 case
+# 期望 value=1 → 1+2+3=6；value=2 → 2+3=5；value=3 → 3；其它 → 77
+# ============================================================
+def MatchCaseFallthroughTest(value: t.CInt) -> t.CInt:
+    result: t.CInt = 0
+    match value:
+        case 1:
+            result += 1
+            fallthrough
+        case 2:
+            result += 2
+            fallthrough
+        case 3:
+            result += 3
+        case _:
+            result = 77
+    return result

LogicFlowTest/App/main.vp

@@ -103,4 +103,24 @@ def main() -> t.CInt:
     logic_test.ForWithCaseNoBreakNested(4)
     testcheck.ok("For With Case NoBreak Nested (4)")
 
+    testcheck.section("Match Case Break = Exit Match (limit=5)")
+    testcheck.check(logic_test.MatchCaseBreakTest(5) == 117,
+                    "match break exits match only (117)", "match break expect 117")
+
+    testcheck.section("Match Case Fallthrough (value=1)")
+    testcheck.check(logic_test.MatchCaseFallthroughTest(1) == 6,
+                    "fallthrough 1 -> 6", "fallthrough 1 expect 6")
+
+    testcheck.section("Match Case Fallthrough (value=2)")
+    testcheck.check(logic_test.MatchCaseFallthroughTest(2) == 5,
+                    "fallthrough 2 -> 5", "fallthrough 2 expect 5")
+
+    testcheck.section("Match Case Fallthrough (value=3)")
+    testcheck.check(logic_test.MatchCaseFallthroughTest(3) == 3,
+                    "fallthrough 3 -> 3", "fallthrough 3 expect 3")
+
+    testcheck.section("Match Case Fallthrough (value=9, default)")
+    testcheck.check(logic_test.MatchCaseFallthroughTest(9) == 77,
+                    "fallthrough default -> 77", "fallthrough default expect 77")
+
     return testcheck.end()