fix(strategy): 编辑器加载文件误标未保存(code程序化赋值触发watch置dirty,运行回测被拦);select后nextTick复位 [nas]

frontend/src/views/strategy/Code.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ref, computed, onMounted, watch } from 'vue'
+import { ref, computed, onMounted, watch, nextTick } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
 import { ElMessage } from 'element-plus'
 import MonacoEditor from '@/components/MonacoEditor.vue'
@@ -61,8 +61,13 @@ async function select(f: StrategyFile): Promise<void> {
   try {
     const { data } = await apiClient.get<{ code: string }>(`/strategy/file/${f.name}`)
     code.value = data.code
+    // 程序化赋值会触发 watch(code) 误标 dirty → 渲染后复位
+    await nextTick()
+    dirty.value = false
   } catch {
     code.value = ''
+    await nextTick()
+    dirty.value = false
     ElMessage.error(`读取 ${f.name} 失败`)
   } finally {
     loadingCode.value = false