[Bug]: Bridge-Mode breaking access to SSH / WebUI

Code of Conduct

[X] I agree to follow this project's Code of Conduct.

Issue reporting checklist

[X] I have read and understand the issue reporting policy.
[X] I observed this bug on a clean install of a supported OS.
[X] I have followed the project prerequisites.
[X] I have searched this repository for existing issues.
[X] I checked the FAQ and official documentation.
[X] I have generated a RaspAP debug log and performed a self-diagnosis.

Operating System

Raspberry Pi OS (32-bit) Lite Bookworm

Quick install or Manual setup?

Quick install

Onboard wireless chipset or external adapter?

Onboard wireless chipset

Hardware

Raspberry Pi 4 Model B

RaspAP version

3.0 (Latest)

Other software or services running with RaspAP?

No other software

Contact details (optional)

cycr0w@yahoo.de

Bug description

After setting the Bridge-Mode slider on the Web-UI and rebooting, you will loose all access to SSH and the Web-UI of RaspAP. This is because of a deep oversight:

The Raspberry devs have no native way to set up a static IP address. You are actually encouraged to set a DHCP reservation. RaspAP installs DHCPcd that sets the interfaces via DHCPcd.conf located under /etc/DHCPcd.conf. A breaking bug cuts off all access to ones raspberry pi, because it was not considered, that a user might not configure a static IP. Omitting the interface "eth0" from "blockedinterfaces eth0 wlan0" solves the issue.

A problem ontop of that is, that this behaviour or additional steps to be taken are no where documented. What is documented is wrong too, because the Pi can't get an address anymore and is unreachable from a routers lease.

Steps to reproduce

Install Pi
Use DHCP reservation
Install RaspAP following documentation
Nothing installed but control service (should be called daemon)
Set Bridge-Mode slider
Don't make changes to /etc/DHCPcd.conf
Reboot

Screenshots

No response

Additional context

Im a mere Microsoft Server SysAdmin sometimes meddling with linux. After breaking it with an update I spent almost 8hrs to get it working again, after it breaking over and over on me again. I don't fully understand some workings, even though I prefer debian but still.. that was some hardcore issue finding.

Before any cryouts appear that routers work differently: Im using an EdgeRouter X from Unifi and they're a longterm big player when it comes to networking. Many professionals are employing their devices and I would put my first born son as a bet on the table, they are following the RFCs available.

Relevant log output

No response

RaspAP / raspap-webgui