cards: From card button + normalized duplicate ICCID refusal (v2.2.18)

- The card create/edit form gets a From card button next to the ICCID
  field: it fills the field with the equipped card's EF.ICCID. It uses the
  availability model through a new 'card-iccid' requirement - enabled only
  while /api/status reports a connected card with a readable iccid; with a
  card but no readable ICCID the tooltip says so, otherwise the usual
  'insert and equip' hint applies. The last status ICCID is kept in
  _pysimCardIccid (cleared on disconnect) so the click needs no round-trip.
- Duplicate ICCID refusal now compares normalized values via
  cardsNormIccid/cardsFindDuplicateIccid (digits, spaced digits and raw EF
  hex all identify the same card), skips the row being edited, ignores an
  empty field, and names the conflicting preset in the alert (translated).
- i18n RU: From card -> 'С карты', duplicate/unreadable alerts.
- Tests: cardsFindDuplicateIccid across formats and edit-skip,
  cardsIccidFromCard fill + alert path, form wiring guards, _pysimCardIccid
  tracking in the card-state harness, card-iccid availability gating in the
  indicator harness. 261 Python + 400 frontend tests green.
- Docs: help EN+RU Cards field table, READMEs, AGENTS. SW otaman-v185.

frontend/tests/cards_iccid.test.js

@@ -23,7 +23,8 @@ function extractFunc(src, name) {
 
 let code = '';
 for (const fn of ['swapNibbles', 'encIccid', 'decIccid',
-	'cardsNormIccid', 'cardsFindByIccid', 'cardsAutoSelectByIccid']) {
+	'cardsNormIccid', 'cardsFindByIccid', 'cardsFindDuplicateIccid',
+	'cardsIccidFromCard', 'cardsAutoSelectByIccid']) {
 	code += extractFunc(html, fn) + '\n';
 }
 eval(code);
@@ -33,11 +34,18 @@ const RAW_HEX = '980711090000640090F8';
 const DIGITS = '8970119000004600098';
 
 function fakeDoc() {
-	const els = { 'sp-card-sel': { value: '' }, 'ram-card-sel': { value: '' } };
+	const els = { 'sp-card-sel': { value: '' }, 'ram-card-sel': { value: '' }, 'cards-iccid': { value: '' } };
 	globalThis.document = { getElementById: id => els[id] || null };
 	return els;
 }
 
+function fakeAlert() {
+	const seen = [];
+	globalThis.alert = msg => seen.push(msg);
+	globalThis.t = s => s;
+	return seen;
+}
+
 test('cardsNormIccid accepts digits, separators and raw EF hex', () => {
 	assert.strictEqual(cardsNormIccid(DIGITS), DIGITS);
 	assert.strictEqual(cardsNormIccid(' 89 70 1190-0000 4600 098 '), DIGITS);
@@ -104,6 +112,53 @@ test('cardsAutoSelectByIccid reacts to a card swap and to unreadable ICCIDs', ()
 	assert.strictEqual(cardsAutoSelectByIccid('1234567890123456789'), -1);
 });
 
+test('cardsFindDuplicateIccid catches duplicates across stored formats', () => {
+	globalThis.cards = [
+		{ name: 'A', iccid: '1111111111111111111' },
+		{ name: 'B', iccid: RAW_HEX },
+		{ name: 'C', iccid: '' },
+	];
+	assert.strictEqual(cardsFindDuplicateIccid(DIGITS), 1);
+	assert.strictEqual(cardsFindDuplicateIccid('89 70 1190-0000 4600 098'), 1);
+	assert.strictEqual(cardsFindDuplicateIccid('1111111111111111111'), 0);
+	assert.strictEqual(cardsFindDuplicateIccid('2222222222222222222'), -1);
+	// empty ICCID is never a duplicate (the field is optional)
+	assert.strictEqual(cardsFindDuplicateIccid(''), -1);
+	assert.strictEqual(cardsFindDuplicateIccid('   '), -1);
+});
+
+test('cardsFindDuplicateIccid skips the row being edited', () => {
+	globalThis.cards = [{ name: 'A', iccid: DIGITS }, { name: 'B', iccid: '' }];
+	assert.strictEqual(cardsFindDuplicateIccid(DIGITS, 0), -1);
+	assert.strictEqual(cardsFindDuplicateIccid(RAW_HEX, 0), -1);
+	assert.strictEqual(cardsFindDuplicateIccid(RAW_HEX, 1), 0);
+});
+
+test('cardsIccidFromCard fills the field from the equipped card', () => {
+	const els = fakeDoc();
+	const seen = fakeAlert();
+	globalThis._pysimCardIccid = DIGITS;
+	cardsIccidFromCard();
+	assert.strictEqual(els['cards-iccid'].value, DIGITS);
+	assert.deepStrictEqual(seen, []);
+	// no readable ICCID (state raced the click): alert, leave the field alone
+	els['cards-iccid'].value = 'keep-me';
+	globalThis._pysimCardIccid = null;
+	cardsIccidFromCard();
+	assert.strictEqual(els['cards-iccid'].value, 'keep-me');
+	assert.deepStrictEqual(seen, ['Card equipped but its ICCID is not readable']);
+});
+
+test('the From card button and the duplicate refusal are wired into the form', () => {
+	assert.match(html, /<button id="cards-iccid-from-card" data-needs="card-iccid" onclick="cardsIccidFromCard\(\)"/);
+	assert.ok(html.includes('data-l10n="From card"'));
+	// normalized duplicate check with the conflicting preset named
+	assert.ok(html.includes('cardsFindDuplicateIccid(v.iccid, _cardsEditIdx)'));
+	assert.ok(html.includes("t('Card with this ICCID already exists') + ': ' + (cards[dupIdx].name"));
+	assert.ok(html.includes("'From card': 'С карты'"));
+	assert.ok(html.includes("'Card with this ICCID already exists': 'Карта с таким ICCID уже есть в списке'"));
+});
+
 test('the card-state update wires the ICCID into the preset selection', () => {
 	assert.ok(html.includes('cardsAutoSelectByIccid(status.iccid);'));
 	assert.ok(html.includes('_cardsAutoIccid = null;'));