refactor: 简化评测创建向导规则来源

移除已有维度/基线两种规则来源，评测创建仅保留新建维度流程并自动生成维度名称；维度名称字段回归独立创建页，表单校验改为返回精确布尔值并启用 scroll-to-error。

frontend/src/views/eval/create/EvalRuleSetupStep.vue

@@ -28,10 +28,6 @@ const existingRules: FormRules = {
 }
 
 const dimensionRules: FormRules<DimensionFormDraft> = {
-  name: [
-    { required: true, message: '请输入维度名称', trigger: 'blur' },
-    { max: 50, message: '维度名称不超过 50 个字符', trigger: 'blur' },
-  ],
   type: [{ required: true, message: '请选择指标类型', trigger: 'change' }],
   eval_model: [{ required: true, message: '请选择大模型', trigger: 'change' }],
   eval_method: [{ required: true, message: '请选择评估方式', trigger: 'change' }],
@@ -43,12 +39,11 @@ const selectedDimension = computed(() =>
 )
 
 async function validate() {
-  if (form.value.ruleMode === 'baseline') return true
-  const target = form.value.ruleMode === 'existing' ? existingFormRef.value : newFormRef.value
+  const target = newFormRef.value
   if (!target) return false
   try {
-    await target.validate()
-    return true
+    const valid = await target.validate()
+    return !!valid
   } catch {
     return false
   }
@@ -59,91 +54,22 @@ defineExpose({ validate })
 
 <template>
   <div class="rule-step">
-    <div class="rule-mode-label">评测规则来源</div>
-    <el-radio-group v-model="form.ruleMode" :disabled="disabled" class="rule-mode-group">
-      <el-radio-button value="existing">选择已有维度</el-radio-button>
-      <el-radio-button value="new">新建评测维度</el-radio-button>
-      <el-radio-button value="baseline">系统基线规则</el-radio-button>
-    </el-radio-group>
-
     <el-form
-      v-if="form.ruleMode === 'existing'"
-      ref="existingFormRef"
-      :model="form"
-      :rules="existingRules"
-      label-width="120px"
-      class="step-form"
-      :disabled="disabled"
-    >
-      <el-form-item label="评测维度" prop="dimension_id">
-        <el-select
-          v-model="form.dimension_id"
-          placeholder="请选择评测维度"
-          filterable
-          style="width: 100%"
-          :loading="loading"
-        >
-          <el-option
-            v-for="dimension in dimensions"
-            :key="dimension.id"
-            :label="dimension.name"
-            :value="dimension.id"
-          />
-        </el-select>
-      </el-form-item>
-
-      <el-form-item v-if="selectedDimension" label="维度详情">
-        <el-descriptions :column="1" border size="small" style="width: 100%">
-          <el-descriptions-item label="指标类型">{{ selectedDimension.type || '-' }}</el-descriptions-item>
-          <el-descriptions-item label="评估模型">{{ selectedDimension.eval_model || '-' }}</el-descriptions-item>
-          <el-descriptions-item label="评估方法">
-            {{
-              Array.isArray(selectedDimension.eval_method)
-                ? selectedDimension.eval_method.join('、')
-                : selectedDimension.eval_method || '-'
-            }}
-          </el-descriptions-item>
-          <el-descriptions-item v-if="selectedDimension.description" label="说明">
-            {{ selectedDimension.description }}
-          </el-descriptions-item>
-        </el-descriptions>
-      </el-form-item>
-    </el-form>
-
-    <el-form
-      v-else-if="form.ruleMode === 'new'"
       ref="newFormRef"
       :model="form.newDimension"
       :rules="dimensionRules"
       label-width="130px"
       class="step-form step-form-wide"
       :disabled="disabled"
+      scroll-to-error
     >
       <DimensionFormFields v-model="form.newDimension" :eval-models="evalModels" />
     </el-form>
-
-    <el-alert
-      v-else
-      title="系统将使用内置基线规则进行评测，无需额外创建或选择评测维度。"
-      type="info"
-      :closable="false"
-      show-icon
-      class="baseline-alert"
-    />
   </div>
 </template>
 
 <style scoped>
-.rule-mode-label {
-  margin-bottom: 10px;
-  color: #606266;
-  font-size: 14px;
-  font-weight: 500;
-}
 
-.rule-mode-group {
-  margin-bottom: 28px;
-}
 
 .step-form {
   max-width: 760px;
@@ -153,7 +79,5 @@ defineExpose({ validate })
   max-width: 920px;
 }
 
-.baseline-alert {
-  max-width: 760px;
-}
+
 </style>