收口通用图片输入字段标题

迁移通用图片输入面板主图和提示词标题到 PlatformFieldLabel

保留提示词原生 label 语义并补充公共字段标题断言

更新 PlatformUiKit 文档和 Hermes 决策记录

src/components/common/CreativeImageInputPanel.test.tsx

@@ -68,9 +68,15 @@ test('creative image input panel handles reference uploads and preview', () => {
     selector: 'input',
   });
   const promptTextarea = screen.getByLabelText('画面描述');
+  const imageFieldLabel = screen.getByText('拼图画面');
+  const promptFieldLabel = screen.getByText('画面描述');
   const emptyMainImageIconBadge = document.querySelector(
     '[aria-hidden="true"]',
   );
+  expect(imageFieldLabel.className).toContain('shrink-0');
+  expect(imageFieldLabel.className).toContain('text-sm font-black');
+  expect(promptFieldLabel.className).toContain('mb-0');
+  expect(promptFieldLabel.className).toContain('text-sm font-black');
   expect(promptTextarea.className).toContain(
     'border border-[var(--platform-subpanel-border)]',
   );

src/components/common/CreativeImageInputPanel.tsx

@@ -3,6 +3,7 @@ import { type ReactNode, useEffect, useRef, useState } from 'react';
 
 import { ResolvedAssetImage } from '../ResolvedAssetImage';
 import { PlatformActionButton } from './PlatformActionButton';
+import { PlatformFieldLabel } from './PlatformFieldLabel';
 import { PlatformIconBadge } from './PlatformIconBadge';
 import { PlatformIconButton } from './PlatformIconButton';
 import { PlatformModalCloseButton } from './PlatformModalCloseButton';
@@ -204,9 +205,9 @@ export function CreativeImageInputPanel({
                 disabled ? 'opacity-55' : ''
               }`}
             >
-              <div className="mb-2 shrink-0 text-sm font-black text-[var(--platform-text-strong)]">
+              <PlatformFieldLabel variant="form" className="shrink-0">
                 {labels.imageField}
-              </div>
+              </PlatformFieldLabel>
               <div className={imageFrameClassName}>
                 <div className={imageCardClassName}>
                   {isMainImageUploadEnabled ? (
@@ -344,11 +345,10 @@ export function CreativeImageInputPanel({
 
             {showPrompt ? (
               <div className="block shrink-0 lg:min-h-0">
-                <label
-                  htmlFor={promptTextareaId}
-                  className="mb-2 block text-sm font-black text-[var(--platform-text-strong)]"
-                >
-                  {promptLabel}
+                <label htmlFor={promptTextareaId} className="mb-2 block">
+                  <PlatformFieldLabel variant="form" className="mb-0">
+                    {promptLabel}
+                  </PlatformFieldLabel>
                 </label>
                 <div className="relative">
                   <PlatformTextField