Refactoring + Dokumentation: api.js komprimiert (745→267 Zeilen), SseHelper extrahiert, DatabaseService in Partial Classes aufgeteilt, unbenutztes CSS entfernt, ARCHITECTURE.md/ARCHITECTURE_QUICK.md/README.md aktualisiert (neue Features: Embedding, Remote, API-Keys, 16 Tools)

wwwroot/css/chat.css

@@ -266,26 +266,6 @@
   overflow: auto;
 }
 
-.tool-result-markdown {
-  white-space: normal;
-}
-
-.tool-result-markdown p,
-.tool-result-markdown ul,
-.tool-result-markdown ol {
-  margin: 0 0 .4em 0;
-}
-
-.tool-result-markdown p:last-child,
-.tool-result-markdown ul:last-child,
-.tool-result-markdown ol:last-child {
-  margin-bottom: 0;
-}
-
-.tool-result-markdown li {
-  margin-left: 1.2em;
-}
-
 /* Todo-Liste */
 
 .todo-list {