优化各元素输入框中的启发提示文本

音效、背景音乐和图标素材改为空值加灰色启发提示。

角色规范、图标规范和自定义规范输入框补充灰色启发提示。

同步更新相关前端组件测试。

src/components/image-editor/ImageCanvasGenerationDialogModel.ts

@@ -50,11 +50,6 @@ const VIDEO_REFERENCE_LIMITS = {
   video: 3,
   audio: 3,
 } as const;
-const DEFAULT_SOUND_EFFECT_PROMPT =
-  '短促清脆的游戏交互音效，带轻微闪光质感，干净收尾，适合按钮确认或收集奖励。';
-const DEFAULT_BACKGROUND_MUSIC_PROMPT =
-  '适合轻松冒险游戏的循环背景音乐，温暖明亮，旋律简洁，不包含人声。';
-
 function getViewportWorldCenter({
   canvasSize,
   viewport,
@@ -194,6 +189,10 @@ export function createGenerateDialogDraft({
   };
 }
 
+function shouldUseSpecPlaceholderValues(specType: SpecGenerationType) {
+  return specType === 'character' || specType === 'ui';
+}
+
 export function createSpecDialogDraft({
   canvasSize,
   viewport,
@@ -210,7 +209,12 @@ export function createSpecDialogDraft({
     status: 'idle',
     composerOpen: true,
     specType,
-    specValues: { ...DEFAULT_SPEC_FORM_VALUES[specType] },
+    specValues: {
+      ...DEFAULT_SPEC_FORM_VALUES[specType],
+      ...(shouldUseSpecPlaceholderValues(specType)
+        ? { playSetting: '', artStyle: '' }
+        : {}),
+    },
     placeholder: {
       x: worldCenter.x - SPEC_FRAME_ORIGINAL_SIZE.width / 2,
       y: worldCenter.y - SPEC_FRAME_ORIGINAL_SIZE.height / 2,
@@ -274,11 +278,11 @@ export function createIconGenerationDialogDraft({
   const dimensionDefaults = resolveImageDimensionDefaults(normalizedImageModel);
   return {
     mode: 'icon',
-    prompt: formatIconDescriptionsText(DEFAULT_ICON_DESCRIPTIONS),
+    prompt: '',
     status: 'idle',
     composerOpen: true,
     iconSpecReference: null,
-    iconDescriptions: [...DEFAULT_ICON_DESCRIPTIONS],
+    iconDescriptions: [],
     imageModel: normalizedImageModel,
     aspectRatio: dimensionDefaults.aspectRatio,
     imageSize: dimensionDefaults.imageSize,
@@ -373,7 +377,7 @@ export function createSoundEffectGenerationDialogDraft({
   const worldCenter = getViewportWorldCenter({ canvasSize, viewport });
   return {
     mode: 'audio-sound-effect',
-    prompt: DEFAULT_SOUND_EFFECT_PROMPT,
+    prompt: '',
     status: 'idle',
     composerOpen: true,
     soundModel: DEFAULT_SOUND_EFFECT_MODEL,
@@ -399,7 +403,7 @@ export function createBackgroundMusicGenerationDialogDraft({
   const worldCenter = getViewportWorldCenter({ canvasSize, viewport });
   return {
     mode: 'audio-background-music',
-    prompt: DEFAULT_BACKGROUND_MUSIC_PROMPT,
+    prompt: '',
     status: 'idle',
     composerOpen: true,
     makeInstrumental: true,