feat(mobile): iOS polish — theme-color, safe-area, dvh, tap-highlight

MOB-19: Add a viewport Viewport export with viewportFit: 'cover' and
themeColor entries for light (#faf7f2) / dark (#1a1612), plus the
appleWebApp metadata for the home-screen status bar style and title.
Manifest's stale #3b82f6 theme_color updated to match brand cream.

MOB-20: Apply env(safe-area-inset-*) to the sticky chrome — the top
header gets max(padding, inset-left/right) so the logo and tab links
clear the notch in landscape; the bottom tab bar already had
inset-bottom and now also gets inset-left/right.

MOB-21: Replace 100vh with 100dvh in body min-height, modal max-heights,
the map view container, and the fullscreen map. Older engines fall
back via the duplicated vh declaration.

MOB-22: Set -webkit-tap-highlight-color: transparent on body to
suppress the iOS Safari grey flash; add a generic touch-pointer
:active rule (opacity 0.7) so taps still register visually on plain
anchors and bare buttons. Components with their own :active styling
are unaffected.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

nextjs-app/app/globals.css

@@ -92,7 +92,24 @@ body {
     background: var(--bg-primary);
     color: var(--text-primary);
     line-height: 1.6;
+    /* dvh (dynamic viewport) accounts for iOS Safari's collapsing toolbar;
+       fall back to vh on older engines that don't recognise dvh. */
     min-height: 100vh;
+    min-height: 100dvh;
+    /* Suppress the iOS Safari grey tap flash — explicit :active states
+       below carry the press feedback instead. */
+    -webkit-tap-highlight-color: transparent;
+}
+
+/* Provide a baseline press feedback for the most common interactive
+   elements — replaces the suppressed default tap highlight. Buttons and
+   .btn-* classes carry their own :active styles already; this handles
+   plain anchors used as inline links and bare button elements. */
+@media (hover: none) and (pointer: coarse) {
+    a:active,
+    button:active {
+        opacity: 0.7;
+    }
 }
 
 /* Reserve space for the fixed mobile bottom tab bar (56px + safe-area inset). */
@@ -1766,7 +1783,7 @@ body {
     
     .modal-content {
         margin: 1rem;
-        max-height: calc(100vh - 2rem);
+        max-height: calc(100dvh - 2rem);
     }
 
     .modal-header {
@@ -1836,7 +1853,7 @@ body {
 @media (max-width: 480px) {
     .modal-content {
         margin: 0.5rem;
-        max-height: calc(100vh - 1rem);
+        max-height: calc(100dvh - 1rem);
     }
 
     .modal-header {

nextjs-app/app/layout.tsx

@@ -1,4 +1,4 @@
-import type { Metadata } from 'next';
+import type { Metadata, Viewport } from 'next';
 import { DM_Sans, Playfair_Display } from 'next/font/google';
 import Script from 'next/script';
 import { Navigation } from '@/components/Navigation';
@@ -21,7 +21,24 @@ const playfairDisplay = Playfair_Display({
   display: 'swap',
 });
 
+export const viewport: Viewport = {
+  width: 'device-width',
+  initialScale: 1,
+  // viewport-fit=cover lets us paint behind the notch / Dynamic Island so
+  // env(safe-area-inset-*) values resolve to real numbers on iPhone.
+  viewportFit: 'cover',
+  themeColor: [
+    { media: '(prefers-color-scheme: light)', color: '#faf7f2' },
+    { media: '(prefers-color-scheme: dark)', color: '#1a1612' },
+  ],
+};
+
 export const metadata: Metadata = {
+  appleWebApp: {
+    capable: true,
+    title: 'SchoolCompare',
+    statusBarStyle: 'default',
+  },
   title: {
     default: 'SchoolCompare | Compare School Performance',
     template: '%s | SchoolCompare',

nextjs-app/components/HomeView.module.css

@@ -142,7 +142,7 @@
   display: grid;
   grid-template-columns: 1fr 340px;
   gap: 1rem;
-  height: calc(100vh - 280px);
+  height: calc(100dvh - 280px);
   min-height: 520px;
   max-height: 800px;
 }
@@ -467,7 +467,7 @@
   .mapViewContainer {
     grid-template-columns: 1fr;
     grid-template-rows: 1fr;
-    height: calc(100vh - 280px);
+    height: calc(100dvh - 280px);
     min-height: 400px;
   }
 

nextjs-app/components/Navigation.module.css

@@ -10,7 +10,9 @@
 .container {
   max-width: 1400px;
   margin: 0 auto;
-  padding: 0 1.5rem;
+  /* Add the safe-area inset to horizontal padding so the header content
+     clears the notch in landscape on iPhones. */
+  padding-inline: max(1.5rem, env(safe-area-inset-left)) max(1.5rem, env(safe-area-inset-right));
   display: flex;
   justify-content: space-between;
   align-items: center;
@@ -231,8 +233,10 @@
     background: var(--bg-card, white);
     border-top: 1px solid var(--border-color, #e5dfd5);
     box-shadow: 0 -2px 12px rgba(26, 22, 18, 0.06);
-    /* Respect iPhone home-indicator inset */
+    /* Respect iPhone home-indicator (bottom) and notch (left/right in
+       landscape) insets so the tab content never sits under system UI. */
     padding-bottom: env(safe-area-inset-bottom, 0);
+    padding-inline: env(safe-area-inset-left, 0) env(safe-area-inset-right, 0);
     /* Compensate for iOS Chrome's auto-hiding URL bar — Navigation.tsx
        writes the offset based on the Visual Viewport API. translate3d
        (instead of translateY) forces hardware compositing so the bar

nextjs-app/components/SchoolMap.module.css

@@ -7,6 +7,7 @@
 .mapWrapper.fullscreen {
   width: 100vw;
   height: 100vh;
+  height: 100dvh;
 }
 
 .fullscreenBtn {

nextjs-app/public/manifest.json

@@ -1,11 +1,11 @@
 {
   "name": "SchoolCompare",
   "short_name": "SchoolCompare",
-  "description": "Compare primary school KS2 performance across England",
+  "description": "Compare primary and secondary school performance across England",
   "start_url": "/",
   "display": "standalone",
-  "background_color": "#ffffff",
+  "background_color": "#faf7f2",
-  "theme_color": "#3b82f6",
+  "theme_color": "#faf7f2",
   "icons": [
     {
       "src": "/favicon.svg",