feat: 完善智能体图片聊天与会话恢复

- 增加私有图片上传、绑定、历史回显与生命周期清理

- 支持输入草稿恢复、图片交互和模型图片能力约束

- 修复旧脏会话幂等删除与前端会话恢复

easyflow-ui-admin/app/src/views/ai/model/AddModelModal.vue

@@ -88,6 +88,11 @@ const formData = reactive<FormData>({
 });
 
 const modelAbility = ref<ModelAbilityItem[]>(getDefaultModelAbility());
+const visibleModelAbility = computed(() =>
+  modelAbility.value.filter(
+    (item) => item.field !== 'supportImageB64Only' || formData.supportImage,
+  ),
+);
 type SelectableModelType = '' | 'embeddingModel' | 'rerankModel';
 
 const selectedModelType = ref<SelectableModelType>('');
@@ -129,6 +134,13 @@ const handleTagClick = (item: ModelAbilityItem) => {
   }
   item.selected = !item.selected;
   formData[item.field] = item.selected;
+  if (item.field === 'supportImage' && !item.selected) {
+    formData.supportImageB64Only = false;
+    const base64Ability = modelAbility.value.find(
+      (ability) => ability.field === 'supportImageB64Only',
+    );
+    if (base64Ability) base64Ability.selected = false;
+  }
 };
 
 const handleModelTypeChipClick = (
@@ -353,7 +365,7 @@ const save = async () => {
                   aria-hidden="true"
                 ></span>
                 <button
-                  v-for="item in modelAbility"
+                  v-for="item in visibleModelAbility"
                   :key="item.value"
                   type="button"
                   class="model-modal__ability-chip"