Function adopt_session 

async fn adopt_session(
    db: State<'_, DatabaseWrapper>,
    creds: State<'_, CredentialStoreWrapper>,
    auth_manager: &State<'_, AuthManagerWrapper>,
) -> Result<(), String>

Make the newly-active profile the session the rest of the backend acts as.

The token lives in the credential store, which the frontend cannot read, so the swap has to happen here — the frontend then rebuilds its repository handle from the session it can now read back. This mirrors what auth_initialize does on a cold start, and deliberately reuses the same storage path rather than a second one that could drift from it.

TRACES: UR-082 | DR-270