feat(video-from-script): 将可灵生图切换为多图参考风格接口

将 Kling 图像生成器从单图生图 API 升级为多图参考生图端点，支持风格参考图片功能，并更新降级链顺序

.claude/skills/video-from-script/SKILL.md

@@ -140,7 +140,7 @@ Step 3: 生图 → 审查
 
   生图模型
   - 支持模型：gemini / mj / kling
-  - 降级链：gemini → kling → mj → gemini（循环）
+  - 降级链：gemini → mj → kling → gemini（循环）
   - 触发：连续失败→ Agent 换下一个模型重跑失败项
   - 操作：`pipeline.js run --manifest <path> --phase images --retry-failed --image-model <新模型>`
 

.claude/skills/video-from-script/scripts/kling-image-generator.js

@@ -1,13 +1,13 @@
 #!/usr/bin/env node
 
 /**
- * Kling Image Generator - 可灵文生图 / 图生图
+ * Kling Image Generator - 可灵多图参考生图 (风格参考)
  *
+ * 使用 /v1/images/multi-image2image 端点，支持 style_image 风格参考
  * 配置来源: config.json 的 kelingApiKey + kelingSecretAccessKey + kelingApiBaseUrl
  *
  * 用法:
- *   node kling-image-generator.js "a cute cat" -o ./output
- *   node kling-image-generator.js "portrait" -r http://img.com/ref.jpg
+ *   node kling-image-generator.js "a cute cat" -r http://img.com/style.jpg -o ./output
  */
 
 const fs = require('fs')
@@ -75,24 +75,31 @@ async function download(url, outputPath) {
 }
 
 // ============================================================================
-// 可灵图片 API
+// 可灵多图参考生图 API (/v1/images/multi-image2image)
 // ============================================================================
 
 const KlingImageApi = {
   async submit(prompt, options = {}) {
-    const { referenceImageUrl = '', aspectRatio = '' } = options
+    const { styleImageUrl = '', aspectRatio = '' } = options
     const token = getToken()
 
-    const body = { model_name: Config.model, prompt, n: 1 }
-    if (referenceImageUrl) body.image = referenceImageUrl
+    const body = {
+      model_name: Config.model,
+      prompt,
+      n: 1,
+    }
+    if (styleImageUrl) {
+      body.subject_image_list = [{ subject_image: styleImageUrl }]
+      body.style_image = styleImageUrl
+    }
     if (aspectRatio) body.aspect_ratio = aspectRatio
 
     console.log(`\n📡 提交可灵图片任务`)
     console.log(`   模型: ${Config.model}`)
     console.log(`   提示词: ${prompt.substring(0, 80)}...`)
-    if (referenceImageUrl) console.log(`   参考图: ${referenceImageUrl.substring(0, 60)}...`)
+    if (styleImageUrl) console.log(`   风格图: ${styleImageUrl.substring(0, 60)}...`)
 
-    const res = await fetch(`${Config.apiBase}/v1/images/generations`, {
+    const res = await fetch(`${Config.apiBase}/v1/images/multi-image2image`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json', 'Authorization': `Bearer ${token}` },
       body: JSON.stringify(body),
@@ -116,7 +123,7 @@ const KlingImageApi = {
 
     while (Date.now() - startTime < Config.maxPollTime) {
       const token = getToken()
-      const res = await fetch(`${Config.apiBase}/v1/images/generations/${taskId}`, {
+      const res = await fetch(`${Config.apiBase}/v1/images/multi-image2image/${taskId}`, {
         headers: { 'Authorization': `Bearer ${token}` },
       })
 
@@ -150,11 +157,11 @@ const KlingImageApi = {
 // ============================================================================
 
 async function generate(prompt, options = {}) {
-  const { outputDir = './output', referenceImageUrl = '' } = options
+  const { outputDir = './output', styleImageUrl = '', aspectRatio = '' } = options
 
   fs.mkdirSync(outputDir, { recursive: true })
 
-  const taskId = await KlingImageApi.submit(prompt, { referenceImageUrl })
+  const taskId = await KlingImageApi.submit(prompt, { styleImageUrl, aspectRatio })
   const result = await KlingImageApi.poll(taskId)
 
   const timestamp = new Date().toISOString().replace(/[:.]/g, '-')
@@ -177,20 +184,22 @@ async function main() {
 
 选项:
   -o, --output <dir>  输出目录 (默认: ./output)
-  -r, --ref <url>     参考图 URL
+  -r, --ref <url>     风格参考图 URL
+  -a, --ar <ratio>    画幅比例 (如 9:16, 16:9)
   -h, --help          帮助
 `)
     return
   }
 
-  const options = { outputDir: './output', referenceImageUrl: '' }
+  const options = { outputDir: './output', styleImageUrl: '', aspectRatio: '' }
   const params = []
 
   let i = 0
   while (i < args.length) {
     const arg = args[i]
     if (arg === '-o' || arg === '--output') { options.outputDir = args[++i] }
-    else if (arg === '-r' || arg === '--ref') { options.referenceImageUrl = args[++i] }
+    else if (arg === '-r' || arg === '--ref') { options.styleImageUrl = args[++i] }
+    else if (arg === '-a' || arg === '--ar') { options.aspectRatio = args[++i] }
     else { params.push(arg) }
     i++
   }

.claude/skills/video-from-script/scripts/pipeline.js

@@ -221,7 +221,7 @@ async function phaseImages(manifest, manifestPath, options) {
         const { generate: klingGen } = require('./kling-image-generator')
         const klingOpts = { outputDir: imagesDir, aspectRatio: ratio }
         if (refs.urls.length > 0) {
-          klingOpts.referenceImageUrl = refs.urls[0]
+          klingOpts.styleImageUrl = refs.urls[0]
         }
         log('images', `[${idx}/${items.length}] 可灵生图: ${item.imagePrompt.substring(0, 60)}...`)
         result = await klingGen(item.imagePrompt, klingOpts)
@@ -272,7 +272,7 @@ async function phaseImages(manifest, manifestPath, options) {
             const { generate: klingGen } = require('./kling-image-generator')
             lastResult = await klingGen(item.lastFramePrompt, {
               outputDir: imagesDir,
-              referenceImageUrl: item.url || '',
+              styleImageUrl: item.url || '',
               aspectRatio: ratio,
             })
           }