Clean up all references to authenticatedData

- De facto, was being assumed everywhere if authenticatedData is null, that it's not logged in. This isn't true because the data can still be loading. Update the hook to send additional states.
- Bonus: Delete model picker code and a slew of unused imports.

src/interface/web/app/settings/page.tsx

@@ -38,7 +38,6 @@ import {
     Key,
     Palette,
     UserCircle,
-    FileMagnifyingGlass,
     Trash,
     Copy,
     CreditCard,
@@ -499,7 +498,6 @@ enum PhoneNumberValidationState {
 }
 
 export default function SettingsView() {
-    const [title, setTitle] = useState("Settings");
     const { apiKeys, generateAPIKey, copyAPIKey, deleteAPIKey } = useApiKeys();
     const { userConfig: initialUserConfig } = useUserConfig(true);
     const [userConfig, setUserConfig] = useState<UserConfig | null>(null);
@@ -514,6 +512,8 @@ export default function SettingsView() {
     const { toast } = useToast();
     const isMobileWidth = useIsMobileWidth();
 
+    const title = "Settings";
+
     const cardClassName =
         "w-full lg:w-1/3 grid grid-flow-column border border-gray-300 shadow-md rounded-lg border dark:border-none dark:bg-muted border-opacity-50";