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).

CHANGELOG.md

@@ -7,6 +7,12 @@ version tags are cut in this repo — POC stage, `main` is the release line).
 ## [Unreleased]
 
 ### Changed
+- **Rebrand: Karung.AI / Karung Counter → Feedmill Counting Platform** — UI page
+  titles, header logo, footer, argparse description, systemd unit `Description`s,
+  README/AGENTS headings. Header CSS shrunk below 640px so the longer brand name
+  fits phone screens. Operational names unchanged on purpose: `OBJECT_LABEL`,
+  DB paths, service unit filenames, repo/remote, and Indonesian UI/log strings
+  (`karung`/`truk`).
 - **Plate canonicalization** (`canonical_plate` in `src/do_batch.py`): plates are
   stored uppercase alnum-only (`B 1234 XYZ` / `b-1234.xyz` → `B1234XYZ`), so
   spacing/dot/hyphen variants are one plate everywhere — DB, history, XLSX, DO