fix(school): make hero map fullscreen work on iOS Safari

iOS Safari has no Element.requestFullscreen (fullscreen is video-only),
so tapping the map band or 'View on map' silently did nothing on
iPhones. Fall back to a fixed-position CSS overlay driven by state when
the Fullscreen API is missing or its promise rejects, locking body
scroll while open. The Leaflet map already re-measures via the shared
isFullscreen flag. New e2e journey simulates the iOS condition by
deleting the API and asserts the overlay opens and closes; it fails
against the current production build.

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

.gitea/workflows/diag-staging.yml

@@ -1,28 +0,0 @@
-# TEMPORARY diagnostic workflow — delete after the rankings year= bug is closed.
-name: Staging Rankings Diagnostic
-
-on:
-  push:
-    branches:
-      - diag/staging-rankings-year
-
-jobs:
-  staging-api-diagnostic:
-    name: Staging rankings year diagnostic
-    runs-on: ubuntu-latest
-    steps:
-      - name: Probe staging rankings year handling
-        env:
-          BASE: ${{ secrets.STAGING_BASE_URL }}
-        run: |
-          probe() {
-            echo "== $1 =="
-            curl -s --max-time 15 -D /tmp/h.txt -o /tmp/b.txt "$BASE$1"
-            echo "--- headers:"; cat /tmp/h.txt
-            echo "--- body (first 400 bytes):"; head -c 400 /tmp/b.txt; echo
-          }
-          probe "/api/data-info"
-          probe "/api/filters"
-          probe "/api/rankings?metric=rwm_expected_pct&limit=3"
-          probe "/api/rankings?metric=rwm_expected_pct&limit=3&year=202425"
-          probe "/"

.gitea/workflows/pr-checks.yml

@@ -12,25 +12,7 @@ env:
   PIPELINE_IMAGE_NAME: ${{ gitea.repository }}-pipeline
 
 jobs:
-  # TEMPORARY: evidence gathering for the rankings year= empty-list bug on
+  frontend-checks:
-  # staging. Remove before merging. Prints status codes and row counts only.
-  staging-api-diagnostic:
-    name: Staging rankings year diagnostic
-    runs-on: ubuntu-latest
-    steps:
-      - name: Probe staging rankings year handling
-        env:
-          BASE: ${{ secrets.STAGING_BASE_URL }}
-        run: |
-          echo "== /api/filters years =="
-          curl -s --max-time 15 "$BASE/api/filters" -o /tmp/f.json -w "status %{http_code}\n"
-          python3 -c "import json; print(json.load(open('/tmp/f.json')).get('years'))" || head -c 300 /tmp/f.json
-          echo "== /api/rankings probes (metric=rwm_expected_pct, limit=3) =="
-          for Q in "" "&year=202425" "&year=201819" "&year=2024"; do
-            CODE=$(curl -s --max-time 15 -o /tmp/r.json -w "%{http_code}" "$BASE/api/rankings?metric=rwm_expected_pct&limit=3$Q")
-            echo "query [$Q] -> status $CODE"
-            python3 -c "import json; d=json.load(open('/tmp/r.json')); print('  year:', d.get('year'), 'total:', d.get('total'), 'rows:', len(d.get('rankings', [])))" || head -c 300 /tmp/r.json
-          done
     name: Frontend Typecheck + Tests
     runs-on: ubuntu-latest
     steps: