feat: MiniMax TTS集成、口播批量剪辑流水线、执黑先行二号账号

- 新增 minimax-tts.js 和 minimax-voice-clone.js 脚本
- 新增口播批量剪辑流水线 (口播_assemble.js, 口播_pipeline.js)
- 更新 video-from-script 各阶段脚本 (kling, images, tts, videos)
- 新增执黑先行二号-风格延伸账号
- 更新执黑先行 account.json 配置
- 替换 ugc_product_seeding 参考图
- 更新 CLAUDE.md 和依赖配置

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.claude/skills/video-from-script/scripts/lib/phase-tts.js

@@ -87,7 +87,8 @@ async function phaseTts(manifest, manifestPath, options = {}) {
   const audioDir = path.join(dir, 'audio')
   ensureDir(audioDir)
 
-  const { synthesize } = require('../qwen-tts')
+  const engine = manifest.ttsEngine || 'qwen'
+  const { synthesize } = engine === 'minimax' ? require('../minimax-tts') : require('../qwen-tts')
 
   const videoDur = manifest.estimatedVideoDuration || 6
   const ttsRate = manifest.ttsRate || 1.15
@@ -95,7 +96,22 @@ async function phaseTts(manifest, manifestPath, options = {}) {
   const items = manifest.items.filter(it =>
     (it.script || it.text) && !it.audio
   )
-  if (items.length === 0) { log('tts', '无待处理 item（已合成），跳过'); return }
+  if (items.length === 0) {
+    const total = manifest.items.length
+    const withAudio = manifest.items.filter(it => it.audio).length
+    const withScript = manifest.items.filter(it => it.script || it.text).length
+    if (withAudio === 0) {
+      console.error("\n" + "=".repeat(60))
+      console.error("❌ [tts] 严重错误：没有任何待处理的配音项，且 manifest 中也没有已生成的音频！")
+      console.error("=".repeat(60))
+      console.error(`   总数: ${total} | 有script: ${withScript} | 已有audio: ${withAudio}`)
+      if (withScript === 0) console.error("   根因: 所有 item 都缺少 script 文本 — 分镜文件有问题")
+      console.error("=".repeat(60) + "\n")
+      throw new Error(`TTS 阶段中断: ${total} 个 item 均无音频且无待处理项 (script=${withScript}/${total})`)
+    }
+    log('tts', '所有音频已合成，跳过')
+    return
+  }
 
   log('tts', `共 ${items.length} 段, 视频固定时长=${videoDur}s, TTS语速=${ttsRate}x`)
 
@@ -131,6 +147,9 @@ async function phaseTts(manifest, manifestPath, options = {}) {
             model: manifest.ttsModel || undefined,
             instruction: manifest.ttsInstruction || undefined,
             rate: ttsRate,
+            emotion: manifest.ttsEmotion || undefined,
+            languageBoost: manifest.ttsLanguageBoost || undefined,
+            pitch: manifest.ttsPitch ?? undefined,
           })
           break
         } catch (e) {