Set Auth Header for Authentication (BasedHardware#507)

Should close BasedHardware#499

Token is valid for one hour, we can keep refreshing the token as long as
the refresh token is not revoked. The refresh token gets revoked only if
the users account is deleted/disabled or revoked manually from the
backend. When the token is expired, Firebase Auth will automatically
prompt the user to log in when they open the app. The `getAuthHeader`
func refreshes the token only if it has expired or is empty or is about
to expire in 5 minutes.

Fixing LED state (BasedHardware#471)

Red - when device is not connected to the app.
Blue - when device is connected to the app.


https://github.com/user-attachments/assets/91bd37ac-b8d1-4e65-9ab4-c1e5c86beb53

Configure firmware to use Opus codec when sending audio packets (Base…

…dHardware#458)

Update Buying_Guide.md (BasedHardware#304)

confirm deletion widget improved UI

using deepgram :)

using deepgram :)

main.dart hotfix

multi languages transcript are properly displayed

updated version