Network view selector should not change connection preference

In the Control Center, the `Ethernet | WiFi` selector controls both the displayed pane and the connection preference.

This means that simply switching to the Wi-Fi pane to browse or connect to a network changes the routing preference to Wi-Fi and rewrites NetworkManager profile priorities. Selecting Ethernet also hides the Wi-Fi list entirely.

The selector directly calls `setNetworkPreference()`:

https://github.com/AvengeMedia/DankMaterialShell/blob/8d9c9616051e71ce6e76544f735c1794ebd59339/quickshell/Modules/ControlCenter/Details/NetworkDetail.qml#L160-L167

The backend then updates autoconnect priorities and IPv4/IPv6 route metrics:

https://github.com/AvengeMedia/DankMaterialShell/blob/8d9c9616051e71ce6e76544f735c1794ebd59339/core/internal/server/network/priority.go#L107-L172

Expected behavior:

- The selector should only change the displayed pane.
- Browsing Ethernet or Wi-Fi should not modify routing preferences.
- Connection preference should be configured through a separate control.

Start in quickshell/Modules/ControlCenter/Details/NetworkDetail.qml around lines 160-167, then trace the related priority handling in core/internal/server/network/priority.go lines 107-172. Verify that switching panes changes only the displayed view, while routing preferences and NetworkManager priorities remain unchanged; preference configuration should remain separate.

Written by the indexing model from the issue text.