fix account switching (#4636)

closes #4631 
closes #4629 

and other weirdness introduced in Tusky 26.1.
I did a lot of testing on 2 physical devices and multiple emulators. It
definitely is better than before, but probably still not perfect.

app/src/main/java/com/keylesspalace/tusky/network/ApiFactory.kt

@@ -38,9 +38,7 @@ inline fun <reified T> apiForAccount(
                     )
                     .removeHeader(MastodonApi.DOMAIN_HEADER)
                     .build()
-            }
-
-            if (account != null && request.url.host == account.domain) {
+            } else if (account != null && request.url.host == account.domain) {
                 request = request.newBuilder()
                     .header("Authorization", "Bearer ${account.accessToken}")
                     .build()