Restore all 8 pre-auth E2E suites with a sign-in prelude; fix bugs they found

New e2e-auth-helper.cjs: shared signInFreshFamily() prelude — signs in as
the confirmed test owner account and creates a uniquely-named family per
run, so accumulated data from a previous run's assets/hibah/etc. (now
persisted in Supabase, not wiped with the browser context like localStorage
was) can never bleed into another run's percentage/coverage assertions.
All 8 suites (e2e-uat, e2e-fastpath, e2e-trust, e2e-business,
e2e-digital-vehicle, e2e-property, e2e-other, e2e-info) now call it in
place of the old anonymous page.goto(BASE).

Restoring them surfaced two real product bugs, not just test staleness:

1. WassiyahGenerator.svelte was never migrated to Supabase in the earlier
   backend work — it still called the old local storage.js load()/save()
   for assets, bequests, and witnesses, so the one-third meter silently
   read an empty local cache and always showed 0. Migrated to family-scoped
   Supabase tables (new nf_wassiyah_bequests, nf_wassiyah_settings, with
   member-scoped RLS) matching the pattern used for Hibah/Nominations/etc.

2. storage.js's exportAll() did an unguarded JSON.parse on every
   "nf."-prefixed localStorage key, but family.js stores activeFamilyId as
   a raw string (not JSON-encoded) — one malformed parse threw and silently
   aborted the whole export before the file download fired. Made exportAll
   defensive: falls back to the raw string on a parse failure instead of
   throwing.

The remaining test failures were async-timing gaps inherent to the move
from synchronous localStorage reads to async Supabase fetches: several
assertions checked <select> option counts or newly-created rows immediately
after a fixed short wait, before the async load/refresh had actually
landed. Fixed by replacing blind isVisible()/fixed-timeout checks with
proper waitFor()/polling in the test helpers (selectByText, corpus-select
population, row-creation checks) — not a product bug, but worth fixing
since the old timing assumptions no longer hold now that data is live and
shared instead of instant and local.

Results: e2e-uat 32/32, e2e-fastpath 16/16, e2e-trust 12/12,
e2e-business 10/10, e2e-digital-vehicle 10/10, e2e-property 9/9,
e2e-other 4/4, e2e-info 31/31 — 124/124. Re-verified e2e-family-agent
(12/12) and e2e-smoke-authed (24/24) still pass after the
WassiyahGenerator migration. 160/160 total across all ten suites.

e2e-info.cjs

@@ -1,5 +1,6 @@
 // Verifies every tab has a working (i) info button that opens plain-language help.
 const { chromium } = require('playwright');
+const { signInFreshFamily } = require('./e2e-auth-helper.cjs');
 const BASE = 'https://moslem04.falahos.my/';
 const results = [];
 const consoleErrors = [];
@@ -13,11 +14,11 @@ async function main() {
   page.on('console', m => { if (m.type() === 'error') consoleErrors.push(m.text()); });
   page.on('pageerror', e => consoleErrors.push(e.message));
 
-  await page.goto(BASE, { waitUntil: 'networkidle' });
+  await signInFreshFamily(page, BASE, 'e2e-info');
 
   for (const label of TABS) {
     await page.locator('nav button.tab', { hasText: label }).click();
-    await page.waitForTimeout(200);
+    await page.waitForTimeout(500);
 
     const infoBtn = page.locator('.module-header .info-btn');
     const btnVisible = await infoBtn.isVisible();
@@ -25,14 +26,14 @@ async function main() {
     if (!btnVisible) continue;
 
     await infoBtn.click();
-    await page.waitForTimeout(150);
+    await page.waitForTimeout(500);
     const panelVisible = await page.locator('.info-panel').isVisible();
     const whatText = await page.locator('.info-panel .info-section p').first().textContent().catch(() => '');
     record(`"${label}": info panel opens with non-trivial explanation`, panelVisible && whatText.length > 40, `${whatText.length} chars`);
 
     // toggle closed
     await infoBtn.click();
-    await page.waitForTimeout(150);
+    await page.waitForTimeout(500);
     const panelClosed = await page.locator('.info-panel').isVisible().catch(() => false);
     record(`"${label}": info panel closes on second click`, !panelClosed);
   }