Dodaj admin web panel u repo (admin/), sinhronizuj systemd unite

- admin/: LAN web panel (Flask + waitress + python-pam), status servisa,
  PAM login sa idriz korisnikom, vertikalni meni. Port 8080, samo LAN.
- systemd/idriz-admin.service: korisnički servis, enabled + Restart=always
  + StartLimitIntervalSec=0.
- systemd/idriz.service: dodan StartLimitIntervalSec=0 (repo je bio zastario).

Od sada sav aplikacioni source code ide u ovaj repo.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LzKpYaEsuWDevuNnvSjcFW

systemd/idriz.service

@@ -1,5 +1,7 @@
 [Unit]
 Description=Idriz - glasovni pomoćnik za djecu
+# Nikad ne odustaj od restartovanja (npr. ako je mreza pala pri bootu)
+StartLimitIntervalSec=0
 After=pipewire.service wireplumber.service network-online.target
 Wants=network-online.target