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/pui_general.spec.ts

@@ -71,9 +71,10 @@ test('PUI - Parts - Supplier Parts', async ({ page }) => {
 test('PUI - Sales', async ({ page }) => {
   await doQuickLogin(page);
 
-  await page.goto(`${baseUrl}/sales/`);
-
+  await page.goto(`${baseUrl}/sales/index/`);
   await page.waitForURL('**/platform/sales/**');
+
+  await page.getByRole('tab', { name: 'Sales Orders' }).click();
   await page.waitForURL('**/platform/sales/index/salesorders');
   await page.getByRole('tab', { name: 'Return Orders' }).click();