Add owned OpenAI endpoint and coordinated native model switching

profiles.py

@@ -35,6 +35,7 @@ class Profiles:
  def __init__(self,path,catalog):
   self.path=Path(path);self.catalog=catalog;self.lock=threading.RLock()
   self.image_runtime_ready=lambda:False
+  self.chat_blockers=None
   self.rows=json.loads(self.path.read_text()) if self.path.exists() else []
  def status(self):
   with self.lock:
@@ -52,6 +53,8 @@ class Profiles:
    except ValueError as exc:p['model']=None;p['blockers']=[str(exc)]
    if p.get('model') and p['model']['repo']==QWEN_REPO and p['model']['file'].endswith('.gguf') and self.image_runtime_ready():
     p['blockers']=[b for b in p['blockers'] if not b.startswith('Eine eigene Bildlaufzeit')]
+   if p['kind']=='chat' and self.chat_blockers and p.get('model'):p['blockers']=self.chat_blockers(p)
+   if p['kind']=='image' and (p['parameters']['width']>1024 or p['parameters']['height']>1024):p['blockers'].append('Die Bildlaufzeit unterstützt derzeit maximal 1024 × 1024 Pixel.')
    p['runnable']=not p['blockers'];p['state']='ready' if p['runnable'] else 'configured'
   return {'profiles':rows,'schemas':SCHEMAS}
  def save(self,data):