feat(maps): Phase 5 — standalone opportunity map page

New route GET /<lang>/opportunity-map renders a full-width Leaflet map
with a country selector. On country change, fetches
/api/opportunity/{slug}.json and renders opportunity circles
(color-coded by score, sized by population) plus existing-venue gray
reference dots from /api/markets/{country}/cities.json.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

web/src/padelnomics/public/routes.py

@@ -5,6 +5,7 @@ from pathlib import Path
 
 from quart import Blueprint, g, render_template, request, session
 
+from ..analytics import fetch_analytics
 from ..core import check_rate_limit, count_where, csrf_protect, execute, fetch_all, fetch_one
 from ..i18n import get_translations
 
@@ -71,6 +72,17 @@ async def market_score():
     return await render_template("market_score.html")
 
 
+@bp.route("/opportunity-map")
+async def opportunity_map():
+    """Interactive padel opportunity map — country selector + location dots."""
+    countries = await fetch_analytics("""
+        SELECT DISTINCT country_slug, country_name_en
+        FROM serving.city_market_profile
+        ORDER BY country_name_en
+    """)
+    return await render_template("opportunity_map.html", countries=countries)
+
+
 @bp.route("/imprint")
 async def imprint():
     lang = g.get("lang", "en")

web/src/padelnomics/public/templates/opportunity_map.html

@@ -0,0 +1,127 @@
+{% extends "base.html" %}
+
+{% block title %}Padel Opportunity Map — {{ config.APP_NAME }}{% endblock %}
+
+{% block head %}
+<meta name="description" content="Explore padel investment opportunities by location. Find underserved markets with high population, strong sports culture, and no existing padel courts.">
+<link rel="stylesheet" href="{{ url_for('static', filename='vendor/leaflet/leaflet.min.css') }}">
+<style>
+  #opportunity-map { width: 100%; height: 600px; border-radius: 12px; }
+  .opp-legend {
+    background: white; padding: 10px 14px; border-radius: 8px;
+    box-shadow: 0 1px 4px rgba(0,0,0,.15); font-size: 0.8125rem; line-height: 1.8;
+  }
+  .opp-legend span { display: inline-block; width: 12px; height: 12px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }
+</style>
+{% endblock %}
+
+{% block content %}
+<main class="container-page py-12">
+  <header class="mb-6">
+    <h1 class="text-3xl mb-2">Padel Opportunity Map</h1>
+    <p class="text-slate">Locations ranked by investment potential — population, supply gap, sports culture, and catchment reach.</p>
+  </header>
+
+  <div class="card mb-4" style="padding: 1rem 1.25rem;">
+    <label class="form-label" for="opp-country-select" style="margin-bottom: 0.5rem; display:block;">Select a country</label>
+    <select id="opp-country-select" class="form-input" style="max-width: 280px;">
+      <option value="">— choose country —</option>
+      {% for c in countries %}
+      <option value="{{ c.country_slug }}">{{ c.country_name_en }}</option>
+      {% endfor %}
+    </select>
+  </div>
+
+  <div id="opportunity-map"></div>
+
+  <div class="mt-4 text-sm text-slate">
+    <strong>Circle size:</strong> population &nbsp;|&nbsp;
+    <strong>Color:</strong>
+    <span style="display:inline-block;width:10px;height:10px;border-radius:50%;background:#16A34A;vertical-align:middle;margin:0 4px"></span>High (≥70) &nbsp;
+    <span style="display:inline-block;width:10px;height:10px;border-radius:50%;background:#D97706;vertical-align:middle;margin:0 4px"></span>Mid (40–70) &nbsp;
+    <span style="display:inline-block;width:10px;height:10px;border-radius:50%;background:#3B82F6;vertical-align:middle;margin:0 4px"></span>Low (&lt;40)
+  </div>
+</main>
+{% endblock %}
+
+{% block scripts %}
+<script src="{{ url_for('static', filename='vendor/leaflet/leaflet.min.js') }}"></script>
+<script>
+(function() {
+  var map = L.map('opportunity-map', {scrollWheelZoom: false}).setView([48.5, 10], 4);
+  L.tileLayer('https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}{r}.png', {
+    attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OSM</a> &copy; <a href="https://carto.com/">CARTO</a>',
+    maxZoom: 18
+  }).addTo(map);
+
+  var oppLayer = L.layerGroup().addTo(map);
+  var refLayer = L.layerGroup().addTo(map);
+
+  function oppColor(score) {
+    if (score >= 70) return '#16A34A';
+    if (score >= 40) return '#D97706';
+    return '#3B82F6';
+  }
+
+  function loadCountry(slug) {
+    oppLayer.clearLayers();
+    refLayer.clearLayers();
+    if (!slug) return;
+
+    // Opportunity dots
+    fetch('/api/opportunity/' + slug + '.json')
+      .then(function(r) { return r.json(); })
+      .then(function(data) {
+        if (!data.length) return;
+        var maxPop = Math.max.apply(null, data.map(function(d) { return d.population || 1; }));
+        var bounds = [];
+        data.forEach(function(loc) {
+          if (!loc.lat || !loc.lon) return;
+          var radius = 4 + 20 * Math.sqrt((loc.population || 1) / maxPop);
+          var color = oppColor(loc.opportunity_score);
+          var dist = loc.nearest_padel_court_km != null
+            ? loc.nearest_padel_court_km.toFixed(1) + ' km to nearest court'
+            : 'No nearby courts';
+          var pop = loc.population >= 1000000
+            ? (loc.population / 1000000).toFixed(1) + 'M'
+            : (loc.population >= 1000 ? Math.round(loc.population / 1000) + 'K' : loc.population);
+          L.circleMarker([loc.lat, loc.lon], {
+            radius: radius,
+            fillColor: color, color: color,
+            fillOpacity: 0.6, opacity: 0.9, weight: 1
+          })
+          .bindTooltip(
+            '<strong>' + loc.location_name + '</strong><br>' +
+            'Opportunity Score: ' + loc.opportunity_score + '/100<br>' +
+            dist + '<br>Population: ' + pop,
+            {className: 'map-tooltip'}
+          )
+          .addTo(oppLayer);
+          bounds.push([loc.lat, loc.lon]);
+        });
+        if (bounds.length) map.fitBounds(bounds, {padding: [30, 30]});
+      });
+
+    // Existing venues as small gray reference dots
+    fetch('/api/markets/' + slug + '/cities.json')
+      .then(function(r) { return r.json(); })
+      .then(function(data) {
+        data.forEach(function(c) {
+          if (!c.lat || !c.lon || !c.padel_venue_count) return;
+          L.circleMarker([c.lat, c.lon], {
+            radius: 4,
+            fillColor: '#94A3B8', color: '#94A3B8',
+            fillOpacity: 0.5, opacity: 0.7, weight: 1
+          })
+          .bindTooltip(c.city_name + ' — ' + c.padel_venue_count + ' venues (existing)', {className: 'map-tooltip'})
+          .addTo(refLayer);
+        });
+      });
+  }
+
+  document.getElementById('opp-country-select').addEventListener('change', function() {
+    loadCountry(this.value);
+  });
+})();
+</script>
+{% endblock %}