chore: drop the hero byline, and refresh a figure in the UX audit notes

Two unrelated working-tree changes, committed as one at the owner's request.

Removes "Built for parents, by a parent." and its comment from the hero. It
was added two commits ago; taking it out is the owner's call, and the reasons
it was placed under the search rather than in the footer no longer apply.

The .heroByline rules in HomeView.module.css are deliberately left in place.
They are now unreferenced, but the class was purpose-built for this one line
and keeping it makes restoring the byline a one-line change. If the removal is
permanent, that block (and its 640px media query) should go with it.

Also updates two quoted figures in the 2026-07-02 UX audit notes from
"24,000+" to "27,000+".

Worth noting for the record: that file documents what the page said when it was
audited, and at that time it genuinely did say "24,000+" — which was itself the
bug later fixed by reading unique_schools instead of a field the API never
sent. Editing the quoted evidence makes the note read consistently with the
current site, at the cost of no longer being a verbatim record of what was
observed. Left as the owner edited it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

docs/superpowers/specs/2026-07-02-ux-audit-notes/journey-1-home-find-school.md

@@ -19,7 +19,7 @@
 - Screenshot `j1-postcode-results-mobile.png` confirms cards carry only the LA name ("Solihull"), no "X miles away".
 
 **Desktop (1440×900) — Attempt A repeat + keyboard + zoom.**
-- Desktop hero additionally shows a trust badge ("● UPDATED WITH 2026/2027 ADMISSIONS RESULTS") and a value-prop subheading ("24,000+ primary and secondary schools with Key Stage 2 SATs, GCSE results, Ofsted grades, progress scores and admissions data — side by side, in one place"). **Both are absent on the mobile hero** (mobile jumps H1 → search box).
+- Desktop hero additionally shows a trust badge ("● UPDATED WITH 2026/2027 ADMISSIONS RESULTS") and a value-prop subheading ("27,000+ primary and secondary schools with Key Stage 2 SATs, GCSE results, Ofsted grades, progress scores and admissions data — side by side, in one place"). **Both are absent on the mobile hero** (mobile jumps H1 → search box).
 - Name search identical, correct, instant (`j1-search-results-desktop.png`).
 - Keyboard: tab order is logical — Skip link → logo → Search/Compare/Rankings/Admissions nav → search input → Search button → Schools near me → content. Skip link, logo, nav links and Search button all get a clear **2px solid orange (#E07256) focus outline**. The search input uses an orange border + very faint ring (`box-shadow rgba(224,114,86,0.12) 0 0 0 3px`, `outline:none`) — visible but weaker than the other controls. Search → results → school link is fully keyboard-operable (standard links/buttons).
 - 200% reflow (720×450): **no horizontal scroll** (`scrollWidth == clientWidth == 720`); deadline cards reflow from 1×4 to 2×2, no overlap or clipping. Pass.
@@ -57,7 +57,7 @@
   - Severity guess: P2
 
 - **F6. Mobile hero omits the value proposition shown on desktop**
-  - Evidence: Desktop hero has the "UPDATED WITH 2026/2027…" badge + subheading "24,000+ primary and secondary schools with KS2 SATs, GCSE results, Ofsted grades… side by side, in one place" (`j1-home-desktop-fold.png`). The mobile hero (`j1-home-mobile-fold.png`) drops both — below the poetic-but-vague H1 there is only a search box.
+  - Evidence: Desktop hero has the "UPDATED WITH 2026/2027…" badge + subheading "27,000+ primary and secondary schools with KS2 SATs, GCSE results, Ofsted grades… side by side, in one place" (`j1-home-desktop-fold.png`). The mobile hero (`j1-home-mobile-fold.png`) drops both — below the poetic-but-vague H1 there is only a search box.
   - Criterion violated: Nielsen #1 (Visibility of system status) / recognition-over-recall; mobile content-parity best practice (the primary 63%-of-entries viewport should not lose the core "what is this and why trust it" copy).
   - Argument: A first-time parent landing on mobile sees "Every school in England, compared." + a bare box, with no statement of coverage, data sources, or freshness. Weak/absent value proposition above the fold is a classic driver of immediate exits — directly relevant to the 46% home-exit rate.
   - Severity guess: P2 (candidate P1 given mobile is the primary, highest-traffic viewport)