Fiches de poste : message de l'organisation en bas de chaque page

Edition.volunteer_message imprimé en pied de chaque page (suite d'une
feuille comprise), la marge du bas agrandie de sa hauteur ; rien sans
message.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

backend/app/api/position_sheets.py

@@ -17,10 +17,12 @@ from app.api.deps import get_edition
 from app.api.schemas import PositionSheetsRequest
 from app.auth.deps import require_coordinator
 from app.db import get_session
+from app.i18n import t
 from app.models import Account, Artist, Assignment, DayPart, Edition, Position, Shift, Volunteer
 from app.sheets.pdf import (
     PositionDaySheet,
     SheetArtist,
+    SheetFooter,
     SheetShift,
     SheetVolunteer,
     generate_position_sheets_pdf,
@@ -151,7 +153,14 @@ def generate_position_sheets(
             status_code=422, detail={"code": "position_sheets.no_shifts"}
         )
 
-    pdf_bytes = generate_position_sheets_pdf(sheets)
+    # Message de l'organisation (le même que sur l'écran bénévole) en bas de
+    # chaque page.
+    footer = (
+        SheetFooter(title=t("position_sheets.footer_title"), message=edition.volunteer_message)
+        if edition.volunteer_message
+        else None
+    )
+    pdf_bytes = generate_position_sheets_pdf(sheets, footer)
     return Response(
         content=pdf_bytes,
         media_type="application/pdf",