diff --git a/src/pages/home/components/ModelInputForm.tsx b/src/pages/home/components/ModelInputForm.tsx
index 00f442c..4fd46e2 100644
--- a/src/pages/home/components/ModelInputForm.tsx
+++ b/src/pages/home/components/ModelInputForm.tsx
@@ -36,6 +36,20 @@ import { useModelUI, isValueEmpty, type UIFieldConfig } from './useModelUI';
 
 const { Text, Title } = Typography;
 
+// ---------- 工具 ----------
+
+/**
+ * Form.Item 的 getValueFromEvent，兼容两种 onChange 参数形态：
+ * 1. Upload 组件的 DOM 事件：{ fileList: UploadFile[] } → 提取 fileList
+ * 2. enable_switch 的裸值：undefined / [] / [{...}] → 直接透传
+ */
+function handleFileWidgetValue(e: unknown): unknown {
+   if (e && typeof e === 'object' && 'fileList' in e) {
+      return (e as { fileList: unknown }).fileList;
+   }
+   return e;
+}
+
 // ---------- 依赖字段包装组件 ----------
 
 /**
@@ -78,6 +92,7 @@ function DependentFormItem({
       <Component
          value={value}
          onChange={onChange}
+         disabled={effectiveDisabled}
          config={effectiveConfig}
       />
    );
@@ -329,7 +344,7 @@ export function ModelInputForm() {
                         }
                         valuePropName={field.valuePropName}
                         {...(field.isFileWidget
-                           ? { getValueFromEvent: (e: { fileList: UploadFile[] }) => e.fileList }
+                           ? { getValueFromEvent: handleFileWidgetValue }
                            : {})}
                      >
                         <DependentFormItem field={field} form={form} />
diff --git a/src/pages/home/components/useModelUI.ts b/src/pages/home/components/useModelUI.ts
index 003f192..d5238ca 100644
--- a/src/pages/home/components/useModelUI.ts
+++ b/src/pages/home/components/useModelUI.ts
@@ -169,11 +169,16 @@ export function isFileWidget(widgetName: string): boolean {
 
 // ---------- 值判空工具 ----------
 
-/** 判断表单值是否为"空"（用于依赖禁用判断） */
+/**
+ * 判断表单值是否为"空"（用于依赖禁用判断）。
+ *
+ * 注意：空数组 [] 不视为空。
+ * 对于 enable_switch 控件：undefined = 开关关闭, [] = 开关开启但未选文件。
+ * 配合 constraints_config.requires：开关开启即解锁依赖字段，无需等待文件上传。
+ */
 export function isValueEmpty(value: unknown): boolean {
    if (value === undefined || value === null) return true;
    if (typeof value === 'string' && value.trim() === '') return true;
-   if (Array.isArray(value) && value.length === 0) return true;
    if (typeof value === 'boolean' && !value) return true;
    return false;
 }
diff --git a/src/pages/home/components/useUI/ImageInput.tsx b/src/pages/home/components/useUI/ImageInput.tsx
index 9cf77c5..a5f0c28 100644
--- a/src/pages/home/components/useUI/ImageInput.tsx
+++ b/src/pages/home/components/useUI/ImageInput.tsx
@@ -6,6 +6,11 @@
 //   当 API ui.enable_switch === true 时，默认禁用（灰色），
 //   需点击 Switch 开关后才能上传——匹配原 Qt 客户端行为。
 //   开关关闭时清除已上传文件。
+//
+// 表单值语义（配合 constraints_config.requires 依赖禁用）：
+//   undefined → 开关关闭 / 未启用  → isValueEmpty = true  → 依赖字段禁用
+//   []        → 开关开启但未上传文件 → isValueEmpty = false → 依赖字段启用
+//   [{...}]   → 已上传文件           → isValueEmpty = false → 依赖字段启用
 // ============================================================
 
 import { useState, useCallback } from 'react';
@@ -22,6 +27,9 @@ function buildAccept(filters?: string[]): string {
    return filters.map((ext) => `image/${ext}`).join(',');
 }
 
+/** 标记"已启用但空"的空数组，避免 react 渲染时引用变化 */
+const ENABLED_EMPTY: UploadFile[] = [];
+
 export function ImageInput({ value, onChange, disabled, config }: WidgetProps) {
    const fileList = (value as UploadFile[]) || [];
    const maxSizeMb = (config.maxFileSizeMb as number) || 10;
@@ -35,16 +43,18 @@ export function ImageInput({ value, onChange, disabled, config }: WidgetProps) {
       (on: boolean) => {
          setSwitchOn(on);
          if (!on) {
-            // 关闭开关 → 清除已上传文件
-            onChange?.([] as unknown as UploadFile[]);
+            // 关闭开关 → 表单值置为 undefined（isValueEmpty = true，依赖字段禁用）
+            onChange?.(undefined);
+         } else {
+            // 开启开关 → 空数组 = "已启用但未上传"（isValueEmpty = false，依赖字段启用）
+            onChange?.(ENABLED_EMPTY as unknown as UploadFile[]);
          }
       },
       [onChange],
    );
 
    return (
-      <Space orientation={"vertical"}
-             style={{ width: '100%' }} size={8}>
+      <Space orientation="vertical" style={{ width: '100%' }} size={8}>
          {hasEnableSwitch && (
             <Space size={8}>
                <Switch
@@ -64,7 +74,12 @@ export function ImageInput({ value, onChange, disabled, config }: WidgetProps) {
             maxCount={1}
             accept={buildAccept(config.fileFilter as string[] | undefined)}
             fileList={fileList}
-            onChange={({ fileList: newList }) => onChange?.(newList as unknown as UploadFile[])}
+            onChange={({ fileList: newList }) => {
+               // 仅当开关开启时上报文件变化
+               if (switchOn || !hasEnableSwitch) {
+                  onChange?.(newList as unknown as UploadFile[]);
+               }
+            }}
             disabled={isUploadDisabled}
             beforeUpload={(file) => {
                const isImage = file.type.startsWith('image/');