[feature] Send webhooks without internet access in Local mode

[capcom6]

Is your feature request related to a problem? Please describe. The current Android app requires an internet connection for sending webhooks, which limits its functionality in local network environments without internet access. This constraint affects users who want to operate the app entirely within their isolated local network.

Describe the solution you'd like Implement a "Local Network Mode" in the app settings that allows users to send webhooks within their local network without requiring an internet connection.

Additional context This feature would align with the app's existing "Local Server", which mentions operating "entirely within your local network." It would enhance the app's versatility for users in environments with limited or no internet access, such as secure facilities.