library: barcode modes, patrons/lending, install-time shelves and item types

Quick Add:
- barcode choices: automatic (zero-padded, >= 7 digits), scan a pre-printed
  sticker per item, or none for now; bulk 'give barcodes to items without one';
  reserve a block of numbers and print the sheet ahead of time (link opens
  Koha's range printer prefilled)
- default shelf saved on the server (shared by every device)
- item types follow Koha; CSP allows cover redirects; aria attrs fixed

Koha bootstrap:
- default lending rule (3 weeks, 25 items, 3 renewals, no fines) - a fresh
  Koha refuses every checkout without one
- automatic library-card numbers (start at 1000001), fines off
- Koha's own auto-barcode off (one numbering scheme)
- patron card template (Avery 5371) and layout with a scannable barcode
- LIBRARY_CODE, SHELVES and ITEM_TYPES honoured at first install

Why 7 digits: decoded printed sheets - 7-digit Code 39 read back 40/40, 6-digit
all-numeric symbols were reinterpreted as Code 32 for ~1 in 10 values.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013wi3ZSot4XbUViwRFgLpRf

library/docker-compose.yml

@@ -37,6 +37,9 @@ services:
       KOHA_ADMIN_USER: ${ADMIN_USER:-admin}
       KOHA_ADMIN_PASS: ${ADMIN_PASSWORD}
       KOHA_LIBRARY_NAME: ${LIBRARY_NAME:-My Library}
+      KOHA_LIBRARY_CODE: ${LIBRARY_CODE:-HOME}
+      KOHA_SHELVES: ${SHELVES:-}
+      KOHA_ITEM_TYPES: ${ITEM_TYPES:-}
     ports:
       - "${BIND_ADDR:-0.0.0.0}:${OPAC_PORT:-8080}:80"
       - "${BIND_ADDR:-0.0.0.0}:${STAFF_PORT:-8081}:8081"
@@ -58,7 +61,7 @@ services:
       KOHA_API: http://koha:8081/api/v1
       ADMIN_USER: ${ADMIN_USER:-admin}
       ADMIN_PASSWORD: ${ADMIN_PASSWORD}
-      KOHA_LIBRARY: HOME
+      KOHA_LIBRARY: ${LIBRARY_CODE:-HOME}
       OPAC_PORT: ${OPAC_PORT:-8080}
       STAFF_PORT: ${STAFF_PORT:-8081}
       QUICKADD_SOURCES: ${QUICKADD_SOURCES:-z3950:lx2.loc.gov:210/LCDB,openlibrary}