rebrand: Karung.AI / Karung Counter -> Feedmill Counting Platform

Brand strings only:
- UI page titles (base/monitoring/history/analytics), header logo, footer
- predict.py argparse description, systemd unit Description fields
- README + AGENTS headings, CHANGELOG entry
- header CSS shrinks below 640px so the longer name fits phone screens

Operational names intentionally unchanged (data/history continuity):
OBJECT_LABEL, DB paths, service unit filenames, repo/remote, Indonesian
UI/log strings (karung/truk).

karung-counter-dashboard.service

@@ -1,5 +1,5 @@
 [Unit]
-Description=Karung Counter History & Excel Dashboard
+Description=Feedmill Counting Platform — History & Excel Dashboard
 After=network.target karung-counter.service
 
 [Service]