Sprint 14: Map-Fixes, City-Prewarm, Dog-Animation, Scan-Flash

Karte:
- Frankfurt-Fallback (Zoom 10→14 flyTo) mit _frankfurtTimer-Cancel
  wenn echter Standort eintrifft
- OSM-Tile-Fetch parallelisiert (asyncio.Semaphore(3))
- Bounds-Fix: invalidateSize() + pad(0.15) vor getBounds()
- map-pin-slash Icon für gesperrten Standort
- Scan-Done-Flash: Statusbar-Pill grün bei 100%
- Schnüffelhund: outer div (by-wander X) + inner SVG (by-sniff Y)
  für natürlichere zweiachsige Bewegung

Backend:
- City-Prewarm-Job: ~70 deutsche Großstädte beim Start (+90s) und
  wöchentlich (So 01:00), Fortschritts-Mails alle 5h an ADMIN_EMAIL
- ADMIN_EMAIL Env-Var in .env.example dokumentiert

Bugfixes:
- Profil-Edit: /api/profile → /profile (doppelter Prefix)
- Friends: Mobile-Portrait-Layout (flex-wrap, overflow-x:hidden)
- Trainingspläne: Pills text-wrap (flex + white-space:normal)

backend/static/icons/phosphor.svg

@@ -25,6 +25,7 @@
   <symbol id="lock-open" viewBox="0 0 256 256"><path d="M208,80H96V56a32,32,0,0,1,32-32c15.37,0,29.2,11,32.16,25.59a8,8,0,0,0,15.68-3.18C171.32,24.15,151.2,8,128,8A48.05,48.05,0,0,0,80,56V80H48A16,16,0,0,0,32,96V208a16,16,0,0,0,16,16H208a16,16,0,0,0,16-16V96A16,16,0,0,0,208,80Zm0,128H48V96H208V208Zm-68-56a12,12,0,1,1-12-12A12,12,0,0,1,140,152Z"/></symbol>
   <symbol id="magnifying-glass" viewBox="0 0 256 256"><path d="M229.66,218.34l-50.07-50.06a88.11,88.11,0,1,0-11.31,11.31l50.06,50.07a8,8,0,0,0,11.32-11.32ZM40,112a72,72,0,1,1,72,72A72.08,72.08,0,0,1,40,112Z"/></symbol>
   <symbol id="map-pin" viewBox="0 0 256 256"><path d="M128,64a40,40,0,1,0,40,40A40,40,0,0,0,128,64Zm0,64a24,24,0,1,1,24-24A24,24,0,0,1,128,128Zm0-112a88.1,88.1,0,0,0-88,88c0,31.4,14.51,64.68,42,96.25a254.19,254.19,0,0,0,41.45,38.3,8,8,0,0,0,9.18,0A254.19,254.19,0,0,0,174,200.25c27.45-31.57,42-64.85,42-96.25A88.1,88.1,0,0,0,128,16Zm0,206c-16.53-13-72-60.75-72-118a72,72,0,0,1,144,0C200,161.23,144.53,209,128,222Z"/></symbol>
+  <symbol id="map-pin-slash" viewBox="0 0 256 256"><path d="M128,64a40,40,0,1,0,40,40A40,40,0,0,0,128,64Zm0,64a24,24,0,1,1,24-24A24,24,0,0,1,128,128Zm0-112a88.1,88.1,0,0,0-88,88c0,31.4,14.51,64.68,42,96.25a254.19,254.19,0,0,0,41.45,38.3,8,8,0,0,0,9.18,0A254.19,254.19,0,0,0,174,200.25c27.45-31.57,42-64.85,42-96.25A88.1,88.1,0,0,0,128,16Zm0,206c-16.53-13-72-60.75-72-118a72,72,0,0,1,144,0C200,161.23,144.53,209,128,222Z"/><path d="M213.66,42.34a8,8,0,0,0-11.32,0L42.34,202.34a8,8,0,0,0,11.32,11.32L213.66,53.66A8,8,0,0,0,213.66,42.34Z"/></symbol>
   <symbol id="map-trifold" viewBox="0 0 256 256"><path d="M228.92,49.69a8,8,0,0,0-6.86-1.45L160.93,63.52,99.58,32.84a8,8,0,0,0-5.52-.6l-64,16A8,8,0,0,0,24,56V200a8,8,0,0,0,9.94,7.76l61.13-15.28,61.35,30.68A8.15,8.15,0,0,0,160,224a8,8,0,0,0,1.94-.24l64-16A8,8,0,0,0,232,200V56A8,8,0,0,0,228.92,49.69ZM104,52.94l48,24V203.06l-48-24ZM40,62.25l48-12v127.5l-48,12Zm176,131.5-48,12V78.25l48-12Z"/></symbol>
   <symbol id="path" viewBox="0 0 256 256"><path d="M200,168a32.06,32.06,0,0,0-31,24H72a32,32,0,0,1,0-64h96a40,40,0,0,0,0-80H72a8,8,0,0,0,0,16h96a24,24,0,0,1,0,48H72a48,48,0,0,0,0,96h97a32,32,0,1,0,31-40Zm0,48a16,16,0,1,1,16-16A16,16,0,0,1,200,216Z"/></symbol>
   <symbol id="paw-print" viewBox="0 0 256 256"><path d="M212,80a28,28,0,1,0,28,28A28,28,0,0,0,212,80Zm0,40a12,12,0,1,1,12-12A12,12,0,0,1,212,120ZM72,108a28,28,0,1,0-28,28A28,28,0,0,0,72,108ZM44,120a12,12,0,1,1,12-12A12,12,0,0,1,44,120ZM92,88A28,28,0,1,0,64,60,28,28,0,0,0,92,88Zm0-40A12,12,0,1,1,80,60,12,12,0,0,1,92,48Zm72,40a28,28,0,1,0-28-28A28,28,0,0,0,164,88Zm0-40a12,12,0,1,1-12,12A12,12,0,0,1,164,48Zm23.12,100.86a35.3,35.3,0,0,1-16.87-21.14,44,44,0,0,0-84.5,0A35.25,35.25,0,0,1,69,148.82,40,40,0,0,0,88,224a39.48,39.48,0,0,0,15.52-3.13,64.09,64.09,0,0,1,48.87,0,40,40,0,0,0,34.73-72ZM168,208a24,24,0,0,1-9.45-1.93,80.14,80.14,0,0,0-61.19,0,24,24,0,0,1-20.71-43.26,51.22,51.22,0,0,0,24.46-30.67,28,28,0,0,1,53.78,0,51.27,51.27,0,0,0,24.53,30.71A24,24,0,0,1,168,208Z"/></symbol>