实现 SFX V2 T1 契约与提示词基础

统一前后端 SFX Prompt Unicode canonicalization、字符计数和 2048 边界
固化 52 个音效预设、追加规则及跨语言测试向量
演进共享音频请求响应、duration、Loop 和 V2 metadata 契约
增加 External model 输入矩阵纯函数并保持正式接线归属 T5
补齐前端提交、读取、深拷贝与请求边界回归测试
更新共享计划并标记 T1 完成且当前不可发布

packages/shared/src/contracts/editorAudio.ts

@@ -6,3 +6,38 @@ export type BackgroundMusicPromptAssistResponse = {
   prompt: string;
   charCount: number;
 };
+
+export type SoundEffectPromptOptimizeRequest = {
+  currentPrompt: string;
+};
+
+export type SoundEffectPromptOptimizeResponse = {
+  prompt: string;
+  charCount: number;
+};
+
+export const EDITOR_SOUND_EFFECT_MODEL = 'eleven_text_to_sound_v2' as const;
+export const SOUND_EFFECT_DURATION_MIN_SECONDS = 0.5;
+export const SOUND_EFFECT_DURATION_MAX_SECONDS = 30;
+
+export type EditorSoundEffectModel = typeof EDITOR_SOUND_EFFECT_MODEL;
+
+export type EditorSoundEffectDurationMode = 'auto' | 'manual';
+
+export type EditorSoundEffectGenerationRequest = {
+  prompt: string;
+  model: EditorSoundEffectModel;
+  duration?: number | null;
+  loop?: boolean;
+};
+
+export type EditorSoundEffectGenerationMetadataV2 = {
+  schemaVersion: 2;
+  userPrompt: string;
+  actualPrompt: string;
+  model: EditorSoundEffectModel;
+  durationMode: EditorSoundEffectDurationMode;
+  requestedDurationSeconds: number | null;
+  actualDurationSeconds: number;
+  loop: boolean;
+};