- Aprsme.Packet.put_phg_fields: dispatch on the shape of the phg value
(map / 4-char binary / anything else) via put_phg_fields_for/2.
- Aprsme.Packet.get_field_value: remove the catch-all nil clause. After
the put_phg_fields refactor, dialyzer can prove every call site passes
a map and flagged the fallback as unreachable — so it's gone, and
a future mistyped caller now fails loudly instead of silently.
- LogSanitizer.sanitize_map: extract redact_field/2 for readability.
- DeviceIdentification.pattern_matches?: match_pattern/3 dispatched on
String.contains?/2 keeps the rescue tight around the regex path.
- InfoLive.Show: get_received_at pattern-matches on key shape;
format_distance splits locale × range via four format_*_distance
helpers; calculate_course pipes through normalize_bearing/1.
Adds 15 tests exercising the InfoLive.Show helpers (imperial vs. metric
formatting, cardinal bearings, haversine symmetry, Decimal inputs).
Coverage 67.43 → 67.72%.
