feat: Add collaboration tool and UI

Integrates real-time document collaboration with a new tool and UI.

Co-authored-by: nicsins <nicsins@gmail.com>

python/collaboration.py

@@ -0,0 +1,32 @@
+from flask_socketio import SocketIO, emit, join_room, leave_room
+from flask import request
+
+socketio = SocketIO(cors_allowed_origins="*")
+
+# In-memory store for documents: {doc_id: content}
+documents = {}
+
+def init_collaboration(app):
+    socketio.init_app(app)
+
+    @socketio.on('connect')
+    def handle_connect():
+        pass
+
+    @socketio.on('join_document')
+    def on_join(data):
+        room = data.get('doc_id', 'default')
+        join_room(room)
+        # Send current document state
+        content = documents.get(room, "")
+        emit('document_state', {'content': content}, room=request.sid)
+
+    @socketio.on('update_document')
+    def on_update(data):
+        room = data.get('doc_id', 'default')
+        content = data.get('content', '')
+        documents[room] = content
+        # Broadcast to others in the room
+        emit('document_updated', {'content': content}, room=room, include_self=False)
+
+    return socketio