Refactor login state management (#7158)

* Refactor login state management

- Previously relied only on presence of cookie
- Cookie may not actually be *valid*
- Inspect actual login state by looking at userState values
- Ensures better sequencing of global state API requests
- Login state is now correctly preseed across browsers

* Ignore errors for user/me/ API endpoint in playwright test

* Do not request notifications unless logged in

* Prevent duplicate licenses

* Update src/frontend/src/views/DesktopAppView.tsx

Co-authored-by: Matthias Mair <code@mjmair.com>

* Simplify checkLoginState

* Fix bug in return types

* Update playwright tests

* linting

* Remove error msg

* Use token auth for API calls

- Will (hopefully) allow us to bypass csrfmiddle request handling?

* Refetch token if not available

* Use cache for DISPLAY_FULL_NAMES setting

* Update src/frontend/tests/baseFixtures.ts

Co-authored-by: Matthias Mair <code@mjmair.com>

* PUI test updates

* Tweak doLogout function

* Revert change to baseFixtures.ts

* Cleanup

* Fix highlighted property

* Test cleanup

---------

Co-authored-by: Matthias Mair <code@mjmair.com>

src/frontend/tests/login.ts

@@ -9,7 +9,6 @@ export const doLogin = async (page, username?: string, password?: string) => {
   password = password ?? user.password;
 
   await page.goto(logoutUrl);
-  await page.goto(loginUrl);
   await expect(page).toHaveTitle(RegExp('^InvenTree.*$'));
   await page.waitForURL('**/platform/login');
   await page.getByLabel('username').fill(username);