feat(export): 批量导出后生成 AI 穿搭 Excel，每印花子目录一行 (§17.23)

添加印花批量导出完成后，自动在输出目录生成与时间戳目录同名的 xlsx
文件（docs/02 §6.12）；每个有效印花子目录一行，C 列指向该子目录路径，
AI 穿搭页直接选取即可触发目录扇出逻辑（§19.12），无需手工填写 Excel。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/widgets/queue_panel.py

@@ -1,4 +1,5 @@
 import logging
+import os
 from dataclasses import dataclass
 from pathlib import Path
 from typing import List, Optional, Tuple
@@ -23,6 +24,7 @@ from PySide6.QtWidgets import (
 
 from core.composer import compose, image_size, resolve_transform
 from core.models import BatchMode, ExportOptions, ImageAsset, Template, TransformState
+from services.excel_service import write_outfit_source_excel
 from services.file_service import (
     get_output_dir,
     make_safe_output_path,
@@ -393,6 +395,27 @@ class QueuePanel(QWidget):
 
         self._running = False
         self._batch_btn.setText("开始批量导出")
+        self._write_outfit_excel(run_dir)
+
+    def _write_outfit_excel(self, run_dir):
+        """Generate an AI-outfit source Excel alongside *run_dir* (docs/02 §6.12)."""
+        run_path = Path(run_dir)
+        if not run_path.is_dir():
+            return
+        _img_exts = {".png", ".jpg", ".jpeg", ".webp", ".gif"}
+        rows = []
+        for subdir in sorted(run_path.iterdir(), key=lambda p: p.name.lower()):
+            if not subdir.is_dir():
+                continue
+            if any(f.suffix.lower() in _img_exts for f in subdir.iterdir() if f.is_file()):
+                rows.append((subdir.name, str(subdir) + os.sep))
+        if not rows:
+            return
+        excel_path = run_path.with_suffix(".xlsx")
+        try:
+            write_outfit_source_excel(excel_path, rows)
+        except Exception as exc:
+            logger.error("Failed to write outfit source Excel: %s", exc)
 
     def _image_size(self, path):
         """Return (w, h) for path, caching within a run. None if unreadable."""