diff --git a/face_features.py b/face_features.py
index b93165e..d3bf0a0 100644
--- a/face_features.py
+++ b/face_features.py
@@ -116,7 +116,7 @@ def _resolve_image_bytes(image_bytes: bytes = None, image_url: str = None) -> by
 
 
 def _local_face_shape(image_bytes: bytes = None, image_url: str = None) -> str:
-    """MediaPipe 脸型分类，返回 display（含混合脸型描述）或主脸型。"""
+    """MediaPipe 脸型分类，只返回主脸型（7 类之一），不含混合描述。"""
     import cv2
     import numpy as np
     from face.face_shape_classifier import classify_from_image
@@ -126,11 +126,12 @@ def _local_face_shape(image_bytes: bytes = None, image_url: str = None) -> str:
     if bgr is None:
         raise ValueError("图片格式不支持，无法解码")
     result = classify_from_image(bgr, return_details=True, return_annotated=False)
-    shape = result.get("display") or result["face_shape"]
+    shape = result["face_shape"]
     logger.info(
-        "local face_shape=%s conf=%.3f",
+        "local face_shape=%s conf=%.3f display=%s",
         shape,
         float(result.get("confidence") or 0),
+        result.get("display") or shape,
     )
     return shape
 
diff --git a/scripts/organize_annotations_by_day.py b/scripts/organize_annotations_by_day.py
new file mode 100644
index 0000000..f39ab39
--- /dev/null
+++ b/scripts/organize_annotations_by_day.py
@@ -0,0 +1,91 @@
+#!/usr/bin/env python3
+"""把 static/annotations 根目录下的图片按创建时间（天）归入 YYYY-MM-DD 子目录。
+
+用法：
+  python3 scripts/organize_annotations_by_day.py              # 实际移动
+  python3 scripts/organize_annotations_by_day.py --dry-run    # 只预览
+  python3 scripts/organize_annotations_by_day.py --dir /path  # 指定目录
+"""
+from __future__ import annotations
+
+import argparse
+import os
+import shutil
+import sys
+from collections import Counter
+from datetime import datetime
+from pathlib import Path
+
+IMAGE_EXTS = {".jpg", ".jpeg", ".png", ".webp", ".gif", ".bmp"}
+
+
+def file_day(path: Path) -> str:
+    """取文件创建日（优先 birth time，否则 mtime），本地时区 YYYY-MM-DD。"""
+    st = path.stat()
+    ts = getattr(st, "st_birthtime", None) or st.st_mtime
+    return datetime.fromtimestamp(ts).strftime("%Y-%m-%d")
+
+
+def main() -> int:
+    repo = Path(__file__).resolve().parent.parent
+    parser = argparse.ArgumentParser(description="按天整理 annotations 图片")
+    parser.add_argument(
+        "--dir",
+        type=Path,
+        default=repo / "static" / "annotations",
+        help="annotations 目录（默认 static/annotations）",
+    )
+    parser.add_argument(
+        "--dry-run",
+        action="store_true",
+        help="只打印将要执行的操作，不实际移动",
+    )
+    args = parser.parse_args()
+    root: Path = args.dir.resolve()
+
+    if not root.is_dir():
+        print(f"目录不存在: {root}", file=sys.stderr)
+        return 1
+
+    files = [
+        p
+        for p in root.iterdir()
+        if p.is_file() and p.suffix.lower() in IMAGE_EXTS
+    ]
+    if not files:
+        print(f"根目录没有待整理图片: {root}")
+        return 0
+
+    by_day: Counter[str] = Counter()
+    moved = 0
+    skipped = 0
+
+    for src in sorted(files):
+        day = file_day(src)
+        dest_dir = root / day
+        dest = dest_dir / src.name
+        by_day[day] += 1
+
+        if dest.exists():
+            print(f"SKIP 目标已存在: {dest.relative_to(root)}")
+            skipped += 1
+            continue
+
+        if args.dry_run:
+            print(f"MOVE {src.name} -> {day}/")
+        else:
+            dest_dir.mkdir(parents=True, exist_ok=True)
+            shutil.move(str(src), str(dest))
+        moved += 1
+
+    print("---")
+    print(f"目录: {root}")
+    print(f"{'预览' if args.dry_run else '完成'}: {moved} 个文件"
+          + (f", 跳过 {skipped}" if skipped else ""))
+    for day in sorted(by_day):
+        print(f"  {day}: {by_day[day]}")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())