ui: rename the Phone simulator tab to Simulator and the eSIM pill to eSIM LPA (v3.5.12)

- Top-level tab label "Phone simulator" -> "Simulator" (RU "Симулятор");
  the DOM ids stay tab-phone / phone-sub-*.
- The eSIM pill inside the Simulator tab is now "eSIM LPA" (EN/RU),
  matching the section's ES10/LPA scope; the panel id stays phone-sub-esim.
- Documentation updated: help EN/RU (section 8 Simulator, list of the four
  pills including Test script, tab lists and cross-references),
  README/README_RUS (tab lists, Simulator section, eSIM LPA), AGENTS
  repo/root.
- Test titles updated; version 3.5.12; sw cache simple-v265.

579 frontend / 467 Python green.

frontend/tests/esim.test.js

@@ -233,7 +233,7 @@ test('the chip view groups the sections into a grid', () => {
 	assert.match(fn, /esimChipSectionRows/);
 });
 
-test('the eSIM pill is wired into the Phone simulator tab', () => {
+test('the eSIM LPA pill is wired into the Simulator tab', () => {
 	assert.ok(html.includes('data-phone-sub="esim"'));
 	assert.ok(html.includes('id="phone-sub-esim"'));
 	assert.ok(html.includes("'phone', 'tr', 'esim'"));