加强变量校验，重复和非法时自动重命名，优化变量管理，实时获取最新变量，不再进行增删操作

src/components/composer/common/VariableInput.vue

@@ -79,7 +79,7 @@
         }"
         class="variable-dropdown prepend-btn"
         size="sm"
-        v-if="variables.length"
+        @click="variables = getCurrentVariables()"
       >
         <q-list class="variable-list">
           <q-item-label header class="variable-label">
@@ -108,6 +108,15 @@
               </q-item-section>
             </q-item>
           </template>
+          <template v-else>
+            <q-item>
+              <q-item-section>
+                <q-item-label
+                  >无可用变量，请先点击命令卡片输出变量按钮设置变量</q-item-label
+                >
+              </q-item-section>
+            </q-item>
+          </template>
         </q-list>
       </q-btn-dropdown>
     </template>
@@ -176,13 +185,14 @@ export default defineComponent({
 
   emits: ["update:modelValue"],
   setup() {
-    const variables = inject("composerVariables", []);
-    return { variables };
+    const getCurrentVariables = inject("getCurrentVariables");
+    return { getCurrentVariables };
   },
 
   data() {
     return {
       selectedVariable: null,
+      variables: [],
     };
   },