fix(web): setup allows adding a printer with no controller configured

Second half of the printer/relay decoupling: the category section's
add-button gate ("add a controller first — a printer points at one of
its relays") blocked every non-access category while zero controllers
existed — hit on the lab bench (USB printer test, no relays on hand).
Printers don't bind (role + failoverRank route jobs), so the gate now
exempts them like the form's requirement already does.

Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V

wiki/log.md

@@ -2477,3 +2477,11 @@ June park-buzi install defaulted under $HOME). [[appliance-provisioning]] §7a n
 root_directory after every install + the sed one-liner fix; also notes `sudo systemctl restart
 periphery` → "unit not found" (user unit) and that the single-use onboarding key survives a
 pre-connect crash.
+
+## [2026-07-07] update | Setup: printers addable with NO controller configured
+
+Lab bench (USB printer test, no relays on hand) hit a SECOND printer/relay coupling the
+2026-07-06 fix missed: the category section's add-button gate ("Shto fillimisht një kontroller…")
+blocks every non-access category while zero controllers exist. Printers are now exempt there too
+— the binding fix removed the requirement inside the form; this removes the gate in front of it.
+A controller-less box can configure + test a printer.