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/event_forms.test.js

@@ -31,6 +31,7 @@ function extractFunc(src, name) {
 // Rewrite top-level const -> var so the maps leak out of sloppy-mode eval.
 eval(extractBlock('const CMD_NAMES = {', 'function cmdQualifierShort').replace(/^const /gm, 'var '));
 eval(extractFunc(html, 'cmdQualifierShort'));
+eval(extractBlock('const EVENT_NAMES = {', 'const REJECTION_CAUSES = [').replace(/^const /gm, 'var '));
 eval(extractBlock('const REJECTION_CAUSES = [', 'const EVENT_FORMS = {').replace(/^const /gm, 'var '));
 eval(extractBlock('const EVENT_FORMS = {', 'const PLI_QUALIFIERS = [').replace(/^const /gm, 'var '));
 
@@ -64,6 +65,27 @@ test('cmdQualifierShort returns empty for unknown types', () => {
 	assert.strictEqual(cmdQualifierShort('99', 0x01), '');
 });
 
+test('EVENT_NAMES follows the pinned CAT spec and names the 3GPP events', () => {
+	assert.strictEqual(EVENT_NAMES[0x0B], 'Access technology change (single)');
+	assert.strictEqual(EVENT_NAMES[0x14], 'Access technology change (multiple)');
+	assert.strictEqual(EVENT_NAMES[0x19], 'Profile container');
+	assert.strictEqual(EVENT_NAMES[0x1C], 'Poll interval negotiation');
+	for (const [v, frag] of [[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']]) {
+		assert.ok(EVENT_NAMES[v].includes(frag), '0x' + v.toString(16) + ': ' + EVENT_NAMES[v]);
+	}
+});
+
+test('the poll interval negotiation event builds a Duration TLV', () => {
+	const build = EVENT_FORMS[0x1C].build;
+	assert.strictEqual(build({ unit: '1', interval: '45' }), '0402012D');
+	assert.strictEqual(build({ unit: '0', interval: '2' }), '04020002');
+	assert.strictEqual(build({ unit: '2', interval: '5' }), '04020205');
+	assert.strictEqual(build({ unit: '1', interval: '' }), '0402011E');   // default 30 s
+});
+
 test('channel status event builds the B8 channel status TLV', () => {
 	const build = EVENT_FORMS[0x0A].build;
 	assert.strictEqual(EVENT_FORMS[0x0A].note, undefined);