feat: add AST_CHECK_FAILED status and update result display

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/oj/problem/components/SubmitCode.vue

@@ -149,7 +149,7 @@ watch(
       result === SubmissionStatus.submitting
     )
       return
-    if (result !== SubmissionStatus.accepted) {
+    if (result !== SubmissionStatus.accepted && result !== SubmissionStatus.ast_check_failed) {
       problemStore.incrementFailCount()
     }
   },
@@ -159,7 +159,7 @@ watch(
 watch(
   () => submission.value?.result,
   async (result) => {
-    if (result !== SubmissionStatus.accepted) return
+    if (result !== SubmissionStatus.accepted && result !== SubmissionStatus.ast_check_failed) return
 
     // 1. 刷新题目状态
     problem.value!.my_status = 0
@@ -173,6 +173,8 @@ watch(
       )
     }
 
+    if (result !== SubmissionStatus.accepted) return
+
     // 3. 放烟花
     celebrate()