Tints districts the user's Bezirk filter has EXCLUDED in light yellow
(#fde68a, fillOpacity 0.35) so the active selection is obvious from
the map alone — and you can see at a glance whether a "rausgefiltert"
flat fell in a no-go district. When no district filter is set the
overlay stays off entirely (nothing is excluded).
Wiring:
- Berlin Bezirke GeoJSON checked in at web/static/berlin-districts.geojson
(12 features, name property matches our DISTRICTS list 1:1, props
stripped down to {name} and minified — 312KB raw, ~80KB gzipped).
- Route exposes the user's selected_districts_csv to the template.
- The flats-map-data <script> carries it on data-selected-districts so
it flows in alongside csrf and the marker payload.
- map.js fetches the GeoJSON once (cache normally), keeps the layer in
a module-level reference, and re-styles it via setStyle() on every
swap (cheap). Marker layer is kicked to the front so pins always
paint above the shaded polygons. fingerprintOf now also folds in
the selected-districts CSV so a Bezirk-only filter change still
triggers a re-render.
Branch only — kept off main while we see if this reads well.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
EiSiMo
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