cards: read EF.ICCID at equip and auto-select the matching preset (v2.2.16)

- Server: _decode_iccid (nibble-swapped E.118 digits, trailing-F pad) and
  _read_iccid (best-effort MF/2FE2 read through the parent-scoped select
  helper; the previous selection is restored, the read never raises). The
  equip path records the digit string before the TERMINAL PROFILE, i.e.
  before any CAT session is active; a startup with a card does the same.
  The value is cleared on card removal and exposed as /api/status 'iccid'
  (only while connected).
- PWA: when a connected status update reports a *new* ICCID, the matching
  card preset is selected in both SCP80 views - Secured Packet (sp-card-sel
  + form fill) and RAM (ram-card-sel + _ramCardIdx). Matching normalizes
  digits and accepts the raw EF hex form, leading zeros ignored; a manual
  choice for the same card is kept until the next equip, and a card removal
  re-arms the auto-selection. The status line shows the ICCID.
- Tests: tests/test_iccid.py (decode variants, model + probe read, equip
  recording, disconnect clearing) and frontend/tests/cards_iccid.test.js
  (normalize, find, select, no-override, card swap); the card_state test
  harness stubs the new hook and covers the guard reset.
- Docs: api.md /api/status fields, help EN+RU (SCP80 intro + Cards tab),
  READMEs, AGENTS. SW cache otaman-v183.

frontend/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'otaman-v182';
+const CACHE = 'otaman-v183';
 const URLS = [
   'index.html',
   'help.html',