Login-Frontend + Lehrer-Dashboard + Stadt-Simulation komplett

- login.html: Schueler-Login (Klassencode+User+PW) + Lehrer-Login/Register
- teacher.html: Vollstaendiges Dashboard (Klassen, Schueler, Module, Stats)
- stadt.html: Komplette Simulation mit 27 Kachel-Typen + Kennwerten
- tile-test.html: Spital-Sackgassen gefixt
- PHP-Pages fuer alle neuen HTML-Seiten

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

App/tile-test.html

@@ -402,7 +402,7 @@ var emojiTiles = [
     {e:'🏠',x:-0.32,y:-0.3,s:32},{e:'🏡',x:-0.3,y:0,s:30},{e:'🏠',x:-0.32,y:0.28,s:28},
     {e:'🏘️',x:0.32,y:-0.25,s:30},{e:'🏠',x:0.3,y:0.05,s:32},{e:'🏡',x:0.32,y:0.3,s:28}]},
   {id:'e04', label:'Fabrik', stub:'S', emoji:'🏭', size:85},
-  {id:'e05', label:'Spital', stub:'EW', emoji:'🏥', size:75, extra:[{e:'🚑',x:0,y:0.3,s:32}]},
+  {id:'e05', label:'Spital', stub:'EW', emoji:'🏥', size:65, yoff:-0.12, extra:[{e:'🚑',x:0,y:0.3,s:30}]},
   {id:'e06', label:'Feuerwehr', stub:'S', bg:'rgba(200,50,40,0.12)', emojis:[
     {e:'🏠',x:0,y:-0.15,s:60},{e:'🚒',x:-0.2,y:0.22,s:40},{e:'🚒',x:0.2,y:0.22,s:40}]},
   {id:'e07', label:'Polizei', stub:'N', emoji:'🚔', size:45, extra:[{e:'🏢',x:0,y:0.15,s:55}]},