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).

predict.py

@@ -63,7 +63,7 @@ NO_DB = False         # --no-db: skip SQLite/state-file persistence
 def parse_args():
     """CLI controls — zero flags reproduces systemd production behaviour."""
     p = argparse.ArgumentParser(
-        description="Karung Counter — production pipeline (systemd service + dev CLI)"
+        description="Feedmill Counting Platform — production pipeline (systemd service + dev CLI)"
     )
     p.add_argument("--source", type=str, default=None,
                    help="Video file path (overrides RTSP_URL)")