OSM-Beiträge: dog=yes-Erfassung mit GPS/Zeit-Anti-Fraud + Gamification-Zähler

- Tabelle osm_contributions (status pending→submitted→confirmed/rejected).
- Router /api/osm-contrib: POST /dog-friendly (Anti-Fraud: GPS-Beleg über
  kürzliche eigene Tour ≤50m + Verweil-Proxy, Tour-Recency 48h, Tages-Cap,
  Dedup, Positions-Sanity), GET /status (Zähler).
- Settings-UI: Zähler "X Orte eingetragen · noch Y bis Badge/Pro".
- OSM-Changeset-Upload + Pro-Freischaltung + Geräte-Attestierung folgen separat.

backend/static/js/pages/settings.js

@@ -943,6 +943,7 @@ window.Page_settings = (() => {
               <svg class="ph-icon" style="color:var(--c-success)" aria-hidden="true"><use href="/icons/phosphor.svg#check-circle"></use></svg>
               <span style="font-size:var(--text-sm)">Verknüpft als <strong>${UI.escape(st.osm_name)}</strong></span>
             </div>
+            <div id="settings-osm-count" class="text-sm-muted" style="margin-top:var(--space-3)">…</div>
             <button id="settings-osm-unlink"
                     style="margin-top:var(--space-3);background:none;border:none;
                            color:var(--c-text-muted);font-size:var(--text-xs);cursor:pointer">
@@ -952,6 +953,15 @@ window.Page_settings = (() => {
             try { await API.post('/osm-auth/unlink', {}); } catch (e) {}
             _osmLink();
           });
+          // Gamification-Zähler
+          API.get('/osm-contrib/status').then(cs => {
+            const c = document.getElementById('settings-osm-count');
+            if (!c) return;
+            const n = cs.verified_count || 0;
+            const next = n >= cs.pro_at ? 0 : (n < 10 ? 10 - n : cs.pro_at - n);
+            c.innerHTML = `🐾 <strong>${n}</strong> hundefreundliche Orte eingetragen`
+              + (next ? ` · noch ${next} bis ${n < 10 ? 'zum Kartograf-Badge' : '1 Jahr Pro'}` : ' · Ziel erreicht! 🎉');
+          }).catch(() => { const c = document.getElementById('settings-osm-count'); if (c) c.textContent=''; });
         } else {
           el.innerHTML = `
             <p class="text-sm-muted" style="margin:0 0 var(--space-3);line-height:1.45">