Two fixes for the printer install-batch on prod data:
1. Vendor was read only from the printer's direct vendorid, which the legacy
import never sets (it sets the model; legacy resolved vendor through the
model). Every prod printer came back vendor "unknown", so all fell into the
manual group and the universal PrinterInstaller.exe block never emitted. Now
resolve vendor via the model's vendor when the printer has no direct one, as
the classic installprinter.asp did.
2. Harden the download base URL. Behind IIS the app sees http on a loopback
port and url_root drops the /shopdb mount, giving a broken download URL when
site_base_url is unset. Fall back to https + the forwarded Host + script_root.
Test: a printer with no vendorid but an HP/Xerox model now groups universal.
Rebuilds the classic printer-installer feature: pick printers on the shopfloor
map, download a .bat that installs them.
Backend (asset_routes.py): GET /api/printers/install-batch?printerids=1,2,3
returns a .bat attachment. Groups printers the way the classic installprinter.asp
did - HP/Xerox via the universal PrinterInstaller.exe /PRINTER="a,b,c", printers
with a .exe installpath via that installer /SILENT, and anything else (no
installpath, or a .zip) listed for manual install instead of being run blindly.
Download URLs derive from the site_base_url setting + the IIS-served /installers
folder (no hardcoded host). Reuses the existing install-list query shape.
Frontend: PrinterInstallerMap.vue - full-screen Leaflet shopfloor map (reuses
mapConfig), a marker per network printer at its mapx/mapy, click to toggle-select,
sidebar with the selection + an Install button that downloads the batch. Toplevel
route /printer-installer, printersApi.installList(), and an Installer Map button
on the printers list.
Tests: install-batch grouping (universal/specific/manual) + requires-ids.
