feat(dispatch): 출고 배치별 업로드 원본 zip 다운로드

배치 목록에 '다운로드' 버튼 추가. 피킹/라벨 PDF + 주문 엑셀 중
실제 존재하는 파일만 zip 으로 묶어 내려준다. 한글 파일명은
RFC5987 filename* 으로 인코딩.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/modules/dispatch/router.py

@@ -12,14 +12,17 @@ Order ID / Package ID / Tracking ID / Seller SKU / Quantity 뿐이다.
 
 from __future__ import annotations
 
+import io
 import re
 import shutil
 import unicodedata
+import zipfile
 from pathlib import Path
 from typing import Any
+from urllib.parse import quote
 
 from fastapi import APIRouter, Depends, File, Form, HTTPException, Request, UploadFile
-from fastapi.responses import HTMLResponse, JSONResponse, RedirectResponse
+from fastapi.responses import HTMLResponse, JSONResponse, RedirectResponse, Response
 
 from app.timezone import now_kst, today_kst
 
@@ -259,6 +262,57 @@ async def batch_delete(
     return RedirectResponse(url="/dispatch/", status_code=303)
 
 
+@router.get("/batches/{batch_id:int}/download")
+async def batch_download(
+    request: Request, batch_id: int, user: dict[str, Any] = Depends(_require_user)
+) -> Response:
+    """배치에 업로드된 원본 파일(피킹/라벨 PDF + 주문 엑셀)을 zip 으로 묶어 다운로드."""
+    st = _store(request)
+    if st is None:
+        raise HTTPException(status_code=503, detail="dispatch_db 미설정")
+    batch = st.get_batch(batch_id=batch_id)
+    if batch is None:
+        raise HTTPException(status_code=404, detail="배치를 찾을 수 없습니다.")
+
+    # 저장된 경로 중 실제로 존재하는 파일만 묶는다. 같은 파일명 충돌 시 번호 부여.
+    paths = [
+        batch.get("picking_pdf_path"),
+        batch.get("label_pdf_path"),
+        batch.get("order_export_path"),
+    ]
+    buf = io.BytesIO()
+    used: set[str] = set()
+    count = 0
+    with zipfile.ZipFile(buf, "w", zipfile.ZIP_DEFLATED) as zf:
+        for raw in paths:
+            p = Path(raw) if raw else None
+            if not p or not p.is_file():
+                continue
+            arcname = p.name
+            n = 1
+            while arcname in used:
+                arcname = f"{p.stem}_{n}{p.suffix}"
+                n += 1
+            used.add(arcname)
+            zf.write(p, arcname=arcname)
+            count += 1
+
+    if count == 0:
+        raise HTTPException(status_code=404, detail="다운로드할 업로드 파일이 없습니다.")
+
+    slug = _slugify(batch.get("batch_name") or "dispatch")
+    fname = f"{batch.get('dispatch_date', '')}_{slug}.zip".lstrip("_")
+    headers = {
+        "Content-Disposition": (
+            f"attachment; filename=\"dispatch_{batch_id}.zip\"; "
+            f"filename*=UTF-8''{quote(fname)}"
+        )
+    }
+    return Response(
+        content=buf.getvalue(), media_type="application/zip", headers=headers
+    )
+
+
 # ════════════════════════════════════════════════════════════
 # 출고 작업 리스트 (1박스 = 1카드)
 # ════════════════════════════════════════════════════════════

app/modules/dispatch/templates/dispatch/batches.html

@@ -36,6 +36,7 @@
               <a class="erp-btn erp-btn-outline" href="/dispatch/batches/{{ b.id }}">작업</a>
               <a class="erp-btn erp-btn-outline" href="/dispatch/batches/{{ b.id }}/picking">피킹</a>
               <a class="erp-btn erp-btn-outline" href="/dispatch/batches/{{ b.id }}/handover">전달</a>
+              <a class="erp-btn erp-btn-outline" href="/dispatch/batches/{{ b.id }}/download">다운로드</a>
             </td>
           </tr>
           {% endfor %}