feat: 管理端 SQL 题隐藏输入输出描述与样例表单

- 隐藏 SQL 题的输入/输出描述编辑器
- 隐藏 SQL 题的样例编辑区域
- 跳过 SQL 题的输入输出和样例验证
- SQL 题提交时清空样例数组

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/admin/problem/detail.vue

@@ -344,19 +344,20 @@ async function validateProblem() {
   // 题目
   else if (
     !problem.value.description ||
-    !problem.value.input_description ||
+    (!isSQLProblem.value &&
-    !problem.value.output_description
+      (!problem.value.input_description || !problem.value.output_description))
   ) {
     message.error("题目或输入或输出没有填写")
     hasErrors = true
   }
   // 样例
-  else if (problem.value.samples.length == 0) {
+  else if (!isSQLProblem.value && problem.value.samples.length == 0) {
     message.error("样例没有填写")
     hasErrors = true
   }
   // 样例是空的
   else if (
+    !isSQLProblem.value &&
     problem.value.samples.some(
       (sample) => sample.output === "" || sample.input === "",
     )
@@ -432,12 +433,18 @@ function filterAnswers() {
   )
 }
 
+function filterSamplesForSQL() {
+  // SQL 题不展示样例；后端 CreateSampleSerializer 也不接受空字符串样例
+  if (isSQLProblem.value) problem.value.samples = []
+}
+
 async function submit() {
   const hasValidationErrors = await validateProblem()
   if (hasValidationErrors) return
   filterHint()
   getTemplate()
   filterAnswers()
+  filterSamplesForSQL()
   syncProblemTags()
   const api = {
     "admin problem create": createProblem,
@@ -592,15 +599,16 @@ watch(
     :min-height="300"
   />
   <TextEditor
-    v-if="ready"
+    v-if="ready && !isSQLProblem"
     v-model:value="problem.input_description"
     title="输入的描述"
   />
   <TextEditor
-    v-if="ready"
+    v-if="ready && !isSQLProblem"
     v-model:value="problem.output_description"
     title="输出的描述"
   />
+  <template v-if="!isSQLProblem">
     <div class="box" v-for="(sample, index) in problem.samples" :key="index">
       <n-flex justify="space-between" align="center">
         <strong>测试样例 {{ index + 1 }}</strong>
@@ -631,6 +639,7 @@ watch(
     <n-button class="addSamples box" tertiary type="primary" @click="addSample">
       添加用例
     </n-button>
+  </template>
   <TextEditor v-if="ready" v-model:value="problem.hint" title="提示（选填）" />
   <n-form>
     <n-form-item label="题目的来源（选填）">