feat: card-driven STATUS polling and the Poll Interval Negotiation event (v3.5.9)

- EVENT_NAMES (server + PWA) corrected against TS 102 223 v18.3.0 8.25:
  0x14 is "Access technology change (multiple)" (not Change of UICC
  Access), 0x19 Profile container, 0x1A Void, 0x1B Secured profile
  container, 0x1C Poll interval negotiation, 0x20-0x22 reserved.  Values
  the CAT spec leaves "Reserved for 3GPP" now carry the concrete TS 31.111
  event name + clause (0x11 (I-)WLAN access status, 0x12 Network
  rejection, 0x15 CSG cell selection, 0x17 IMS registration, 0x18 Incoming
  IMS data, 0x1D Data connection status change, 0x1E CAG cell selection,
  0x1F Slices status change).
- Poll Interval Negotiation (0x1C) in the Phone tab: the form proposes a
  Duration (unit + interval) and the UICC's answer (TS 102 223 8.97
  accepted / rejected / modified + optional Duration) is decoded and
  shown; a "modified" duration becomes the background poll interval.  The
  form appears when the card subscribed to the event, like every other.
- Polling emulation is card-driven: a POLL INTERVAL adopts its Duration
  (minutes/seconds/tenths -> 1..255 s, logged) for the background poll,
  is echoed in the TERMINAL RESPONSE (6.8.4) and clears a POLLING OFF
  suspension; POLLING OFF (6.4.14) suspends proactive polling until a new
  POLL INTERVAL - the manual Send STATUS button and presence detection are
  unaffected.  /api/poll-status and /api/poll-toggle report card_disabled
  (+ a warning when enabling while suspended); the PWA shows it in amber.
- Tests: tests/test_poll.py +7, test_proactive_names.py +3, frontend
  event_forms +2 and poll_ui (4).  Help EN/RU, docs/api.md, AGENTS.

573 frontend / 439 Python green; version 3.5.9; sw cache simple-v262.

frontend/tests/poll_ui.test.js

@@ -0,0 +1,62 @@
+const { test } = require('node:test');
+const assert = require('node:assert');
+const fs = require('node:fs');
+const path = require('node:path');
+
+const html = fs.readFileSync(path.join(__dirname, '..', 'index.html'), 'utf8');
+
+function extractFunc(src, name, asyncFn) {
+	const re = new RegExp('function\\s+' + name + '\\s*\\([^)]*\\)\\s*\\{');
+	const m = re.exec(src);
+	if (!m) throw new Error('function ' + name + ' not found');
+	let i = m.index + m[0].length - 1;
+	let depth = 0;
+	for (; i < src.length; i++) {
+		if (src[i] === '{') depth++;
+		else if (src[i] === '}') {
+			depth--;
+			if (depth === 0) break;
+		}
+	}
+	return (asyncFn ? 'async ' : '') + src.slice(m.index, i + 1);
+}
+
+eval(extractFunc(html, 'pysimUpdatePollUI'));
+globalThis.t = s => s;
+
+function setup() {
+	const els = {
+		'pli-pause-btn': { textContent: '', classList: { add: () => {}, remove: () => {} } },
+		'pli-poll-stat': { textContent: '', className: 'text-xs text-gray-400' },
+	};
+	globalThis.document = { getElementById: id => els[id] || null };
+	return els;
+}
+
+test('pysimUpdatePollUI shows the interval while polling is on', () => {
+	const els = setup();
+	pysimUpdatePollUI(true, 30);
+	assert.strictEqual(els['pli-pause-btn'].textContent, 'ON');
+	assert.strictEqual(els['pli-poll-stat'].textContent, '(30s)');
+	assert.ok(!els['pli-poll-stat'].className.includes('amber'));
+});
+
+test('pysimUpdatePollUI shows the card-disabled state in amber', () => {
+	const els = setup();
+	pysimUpdatePollUI(true, 30, true);
+	assert.ok(els['pli-poll-stat'].textContent.includes('POLLING OFF'), els['pli-poll-stat'].textContent);
+	assert.ok(els['pli-poll-stat'].className.includes('text-amber-600'));
+});
+
+test('pysimUpdatePollUI shows a server warning', () => {
+	const els = setup();
+	pysimUpdatePollUI(true, 30, false, 'card disabled proactive polling');
+	assert.strictEqual(els['pli-poll-stat'].textContent, 'card disabled proactive polling');
+});
+
+test('pysimUpdatePollUI clears the status line when off', () => {
+	const els = setup();
+	pysimUpdatePollUI(false, 30);
+	assert.strictEqual(els['pli-pause-btn'].textContent, 'OFF');
+	assert.strictEqual(els['pli-poll-stat'].textContent, '');
+});