feat: badges imprimé (✅ copies) dans galeries admin+public; fix: timestamp_to_date dans print.html

backend/api/admin_api.py

@@ -1,6 +1,7 @@
 """Routes du dashboard admin -- authentification requise."""
 
 import logging
+from datetime import datetime
 from pathlib import Path
 
 from fastapi import APIRouter, Request, Form
@@ -141,6 +142,13 @@ async def admin_print(request: Request):
     queue = await printer_svc.get_queue()
     printers = await printer_svc.get_printers_status()
 
+    # Formate les dates pour le template Jinja2
+    for q in queue:
+        ts = q.get("requested_at")
+        q["requested_at_str"] = (
+            datetime.fromtimestamp(ts).strftime("%d/%m %H:%M") if ts else "—"
+        )
+
     return _templates.TemplateResponse(request, "admin/print.html", {
         "config": cfg,
         "queue": queue,