refactor: restructure navigation into 5 grouped hubs, off the 22-item flat strip

Implements the researched IA fix: mobile nav UX consensus caps primary
destinations at 4-5 (uxpin.com, fintech/banking 2026 UX research), and
this app had grown to 22 tabs in one horizontally-scrolling row —
exactly the anti-pattern that research flags for choice paralysis and
slower task completion.

New structure — 5 bottom-nav hubs, grouped by what the user is actually
trying to do, not build order:
- Home: Coverage (unchanged, still the landing screen)
- Estate: Assets, Faraid, Insurance, Wassiyah, Hibah, Family Waqf,
  Nominate, Claims (H2)
- Giving: Zakat, Sadaqah, Khairat
- Family: Tree, Trigger, Mutawalli, Manage (was 'Family', renamed to
  avoid colliding with the hub's own label), Neighbourhood
- Daily: Prayer Times, Qibla, Quran, Locate

Each hub reveals its own sub-nav one tap in, instead of every tab
competing for space in a single row. Settings moved out of the tab
strip entirely into a header gear icon, matching the banking-app pattern
of keeping settings out of primary thumb-reach real estate. The bottom
nav is now fixed (thumb-zone), sub-nav keeps the old sticky-top position.

Cross-component navigation (nav.js requestedTab, used by the Family
Tree's 'give sadaqah in memory' link) now resolves a tab label to its
owning (hub, sub-tab) pair instead of a flat index — verified live.

This touches every E2E suite: a single click on a tab's old selector no
longer reaches it (hub, then sub-tab). Added a shared gotoTab(page, label)
helper to e2e-auth-helper.cjs encapsulating the two-step navigation, and
migrated all ~22 affected test files off direct nav-button selectors —
mechanical substitution followed by manual fixes for local clickTab
wrappers, template-literal selectors, and active-state assertions that
needed to target the new .hub-tab/.subnav structure specifically.

Full regression after migration: every suite passes (one isolated
Family Tree flake confirmed clean on rerun, unrelated to navigation).

e2e-khairat-lifestyle.cjs

@@ -3,7 +3,7 @@
 // backend. Geolocation-dependent tabs use Playwright's mocked geolocation
 // (Kuala Lumpur coordinates) rather than the real device.
 const { chromium } = require('playwright');
-const { signInFreshFamily } = require('./e2e-auth-helper.cjs');
+const { signInFreshFamily, gotoTab } = require('./e2e-auth-helper.cjs');
 const BASE = 'https://moslem04.falahos.my/';
 const results = [];
 const consoleErrors = [];
@@ -23,7 +23,7 @@ async function main() {
   await signInFreshFamily(page, BASE, 'e2e-khairat');
 
   // ── Khairat ──
-  await page.locator('nav button[aria-label="Khairat"]').click();
+  await gotoTab(page, 'Khairat');
   await page.waitForTimeout(600);
   await page.locator('.field:has-text("Scheme name") input').fill('Kariah Khairat Kematian Masjid Al-Falah');
   await page.locator('.field:has-text("Organization") input').fill('Masjid Al-Falah');
@@ -39,7 +39,7 @@ async function main() {
   record('Khairat: emergency fund progress bar computes correctly (1250/5000 = 25%)', fundProgressVisible);
 
   // ── Trusted contacts with category + email ──
-  await page.locator('nav button[aria-label="Assets"]').click();
+  await gotoTab(page, 'Assets');
   await page.waitForTimeout(500);
   await page.locator('.contacts-section .field:has-text("Name") input').fill('Masjid Al-Falah Office');
   await page.locator('.contacts-section .field:has-text("Category") select').selectOption('mosque');
@@ -50,7 +50,7 @@ async function main() {
   record('Trusted Contacts: category badge shows on the new contact', contactCategoryVisible);
 
   // ── Qibla ──
-  await page.locator('nav button[aria-label="Qibla"]').click();
+  await gotoTab(page, 'Qibla');
   await page.waitForTimeout(500);
   await page.locator('button.btn-primary', { hasText: 'Find Qibla direction' }).click();
   await page.waitForTimeout(2000);
@@ -61,7 +61,7 @@ async function main() {
   record('Qibla: shows distance to Makkah', distanceVisible);
 
   // ── Prayer Times ──
-  await page.locator('nav button[aria-label="Prayer Times"]').click();
+  await gotoTab(page, 'Prayer Times');
   await page.waitForTimeout(500);
   await page.locator('button.btn-primary', { hasText: "Calculate today's prayer times" }).click();
   await page.waitForTimeout(2000);
@@ -70,7 +70,7 @@ async function main() {
   record('Prayer Times: computes all 6 times for Kuala Lumpur', fajrVisible && /Fajr[\s\S]*Sunrise[\s\S]*Dhuhr[\s\S]*Asr[\s\S]*Maghrib[\s\S]*Isha/.test(timesInOrder), timesInOrder.replace(/\n/g, ' '));
 
   // ── Locate (mosque search via live OpenStreetMap Overpass) ──
-  await page.locator('nav button[aria-label="Locate"]').click();
+  await gotoTab(page, 'Locate');
   await page.waitForTimeout(500);
   await page.locator('button.btn-primary', { hasText: 'Search nearby' }).click();
   await page.waitForTimeout(8000); // live Overpass API call
@@ -78,7 +78,7 @@ async function main() {
   record('Locate: mosque search completes (real results or honest empty state)', locateResultOrEmpty);
 
   // ── Quran ──
-  await page.locator('nav button[aria-label="Quran"]').click();
+  await gotoTab(page, 'Quran');
   await page.waitForTimeout(2000);
   const surahListVisible = await page.locator('.surah-row', { hasText: 'Al-Faatiha' }).isVisible().catch(() => false);
   record('Quran: Surah list loads from the public API (Al-Faatiha present)', surahListVisible);
@@ -95,7 +95,7 @@ async function main() {
   // Neighbourhoods are scoped to the user account, not the family — the
   // shared e2e owner account may already belong to one from a prior run,
   // in which case the create/join form is behind the "add another" toggle.
-  await page.locator('nav button[aria-label="Neighbourhood"]').click();
+  await gotoTab(page, 'Neighbourhood');
   await page.waitForTimeout(600);
   const addToggleVisible = await page.locator('.add-toggle').isVisible().catch(() => false);
   if (addToggleVisible) await page.locator('.add-toggle').click();
@@ -124,7 +124,7 @@ async function main() {
   const secondContext = await browser.newContext({ viewport: { width: 390, height: 844 } });
   const secondPage = await secondContext.newPage();
   await signInFreshFamily(secondPage, BASE, 'e2e-khairat-neighbour2');
-  await secondPage.locator('nav button[aria-label="Neighbourhood"]').click();
+  await gotoTab(secondPage, 'Neighbourhood');
   await secondPage.waitForTimeout(600);
   const secondAddToggleVisible = await secondPage.locator('.add-toggle').isVisible().catch(() => false);
   if (secondAddToggleVisible) await secondPage.locator('.add-toggle').click();