feat(scripts): #1893 文案库对接三个AI能力（抖音提取/AI改写/AI生成标题） (#1935)

feat(scripts): #1893 AI能力对接（抖音提取/AI改写/AI生成标题）

apps/web/src/api/scripts/index.ts

@@ -1,2 +1,3 @@
 export * from "./scripts"
 export * from "./types"
+export * from "./scripts-ai"

apps/web/src/api/scripts/scripts-ai.ts

@@ -0,0 +1,87 @@
+/**
+ * 文案库 AI 能力 API（#1893）
+ * 三个端点均走真实后端，不参与 SCRIPTS_API_MOCK 开关。
+ */
+import apiClient from "../client"
+
+/** ── 1. 从抖音视频提取文案（下载 + ASR） */
+export interface ExtractFromDouyinRequest {
+  url: string
+}
+export interface ExtractFromDouyinResponse {
+  text: string
+  duration_seconds?: number
+  source_url?: string
+}
+
+export async function extractScriptFromDouyin(
+  body: ExtractFromDouyinRequest,
+  opts?: { signal?: AbortSignal },
+): Promise<ExtractFromDouyinResponse> {
+  const res = await apiClient.post<ExtractFromDouyinResponse>(
+    "/scripts/extract-from-douyin",
+    body,
+    {
+      // ASR 可能较慢，给足超时
+      timeout: 60_000,
+      signal: opts?.signal,
+    },
+  )
+  return res.data
+}
+
+/** ── 2. AI 改写文案 */
+export type RewriteStyle = "口语化" | "正式" | "活泼" | "治愈" | "励志"
+
+export const REWRITE_STYLE_OPTIONS: { value: RewriteStyle; label: string }[] = [
+  { value: "口语化", label: "口语化" },
+  { value: "正式", label: "正式" },
+  { value: "活泼", label: "活泼" },
+  { value: "治愈", label: "治愈" },
+  { value: "励志", label: "励志" },
+]
+
+export interface AiRewriteRequest {
+  content: string
+  style?: RewriteStyle
+}
+export interface AiRewriteResponse {
+  original: string
+  rewritten: string
+  style: RewriteStyle
+}
+
+export async function aiRewriteScript(
+  body: AiRewriteRequest,
+  opts?: { signal?: AbortSignal },
+): Promise<AiRewriteResponse> {
+  const res = await apiClient.post<AiRewriteResponse>("/scripts/ai-rewrite", body, {
+    timeout: 60_000,
+    signal: opts?.signal,
+  })
+  return res.data
+}
+
+/** ── 3. AI 生成标题 */
+export interface AiGenerateTitlesRequest {
+  content: string
+  count?: number
+}
+export interface AiGenerateTitlesResponse {
+  titles: string[]
+}
+
+export async function aiGenerateTitles(
+  body: AiGenerateTitlesRequest,
+  opts?: { signal?: AbortSignal },
+): Promise<AiGenerateTitlesResponse> {
+  const res = await apiClient.post<AiGenerateTitlesResponse>(
+    "/scripts/ai-generate-titles",
+    { content: body.content, count: body.count ?? 3 },
+    {
+      timeout: 30_000,
+      signal: opts?.signal,
+    },
+  )
+  return res.data
+}