fix: Change dashboard port from 5000 to 8080 to avoid Siemens conflict

- Update Flask server to run on port 8080 instead of 5000
- Update frontend API_BASE URL to http://localhost:8080/api
- Update launcher script to open browser at port 8080
- Update README documentation with new port number

This resolves the port conflict with Siemens documentation server.

dashboard/api/app.py

@@ -457,7 +457,7 @@ if __name__ == '__main__':
     print("="*60)
     print("ATOMIZER DASHBOARD API")
     print("="*60)
-    print("Starting Flask server on http://localhost:5000")
-    print("Access the dashboard at: http://localhost:5000")
+    print("Starting Flask server on http://localhost:8080")
+    print("Access the dashboard at: http://localhost:8080")
     print("="*60)
-    app.run(debug=True, host='0.0.0.0', port=5000, threaded=True)
+    app.run(debug=True, host='0.0.0.0', port=8080, threaded=True)