feat: 增强代码节点编辑器与放大阅读体验

- tinyflow-ui: 新增 CodeScriptEditor（CodeMirror 6）并支持语法高亮、上下文补全、自动括号与 _result 高亮

- tinyflow-ui: 代码节点接入引擎能力列表与节点说明提示，统一 JS/Python 编辑体验

- tinyflow-ui: 增加放大编辑模式，支持居中弹层、ESC 与点击外部关闭

- app/workflow: 对接 supportedCodeEngines 能力并透传 codeEngine provider

easyflow-ui-admin/app/src/types/tinyflow-ai-vue.d.ts

@@ -0,0 +1,5 @@
+declare module '@tinyflow-ai/vue' {
+  import type { DefineComponent } from 'vue';
+
+  export const Tinyflow: DefineComponent<Record<string, any>, Record<string, any>, any>;
+}

easyflow-ui-admin/app/src/views/ai/workflow/WorkflowDesign.vue

@@ -31,6 +31,7 @@ onMounted(async () => {
     loadCustomNode(),
     getLlmList(),
     getKnowledgeList(),
+    getCodeEngineList(),
     getWorkflowInfo(workflowId.value),
   ]);
   showTinyFlow.value = true;
@@ -46,6 +47,13 @@ const runParams = ref<any>(null);
 const tinyFlowData = ref<any>(null);
 const llmList = ref<any>([]);
 const knowledgeList = ref<any>([]);
+const codeEngineList = ref<any[]>([
+  {
+    value: 'js',
+    label: 'JavaScript',
+    available: true,
+  },
+]);
 const provider = computed(() => ({
   llm: () => llmList.value.map((item: any) => {
     let iconStr = undefined;
@@ -83,6 +91,20 @@ const provider = computed(() => ({
       label: $t('aiWorkflow.bochaSearch'),
     },
   ],
+  codeEngine: (): any => codeEngineList.value.map((item: any) => {
+    if (item.available === false) {
+      const reason = item.reason || '未满足运行条件';
+      return {
+        value: item.value,
+        label: `${item.label}（不可用：${reason}）`,
+        selectable: false,
+      };
+    }
+    return {
+      value: item.value,
+      label: item.label,
+    };
+  }),
 }));
 const customNode = ref();
 const showTinyFlow = ref(false);
@@ -166,6 +188,13 @@ async function getKnowledgeList() {
     knowledgeList.value = res.data;
   });
 }
+async function getCodeEngineList() {
+  api.get('/api/v1/workflow/supportedCodeEngines').then((res) => {
+    if (res?.errorCode === 0 && Array.isArray(res.data) && res.data.length > 0) {
+      codeEngineList.value = res.data;
+    }
+  });
+}
 function getRunningParams() {
   api
     .get(`/api/v1/workflow/getRunningParameters?id=${workflowId.value}`)