[PUI] Login / Logout State Fixes (#6368)

* Fix API endpoint URLs

* Adds "authenticated" field to root API endpoint

* Load global status data separately

- Create new global state manager
- Load *after* login
- Prevents auth popup dialog and failure messages

* Add launch config for frontend dev

* Update docs

* Clear token auth if no token is defined

* remove unneeded import

* Revert format of InfoView endpoint

* Remove "authenticated" from InfoView

* Refactor is_staff token check

- Using new get_token_from_request method

* Cleanup code

- return early

* URL fixes

- More fixes for incorrect api calls

* Better tracking of authenticated status

- track an internal flag in apiState

* Prioritize token auth

* Only fetch userState if authenticated

* Force unauthenticated state on first launch

* Updates to login procedure

- Rename doClassicLogin to doBasicLogin (reflecting "basic" auth)
- Add "loggedIn" attribute to sessionState
- Cleanup procedure for securing a token

* Abort early on checkLoginState

- Prevent failed calls to user_me

* Refactoring

- Simpler to just track token state
- No need for separate status tracker
- Works much cleaner this way

* Remove debug messages

* Cleanup unused imports

* Fix unused variable

* Revert timeout to 2000ms

* Rename doClassicLogout -> doLogout

* Improvements for checkLoginState

- Account for the presence of a CSRF session cookie
- If available, use it to fetch a token

* Clear CSRF cookie on logout

- Forces logout from session
- Tested, works well!
- Clean up notifications

* Cleanup setApiDefaults method

* fix global logout (PUI -> CUI)

---------

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

.vscode/launch.json

@@ -21,6 +21,13 @@
       "args": ["runserver"],
       "django": true,
       "justMyCode": false
+    },
+    {
+      "name": "InvenTree Frontend - Vite",
+      "type": "chrome",
+      "request": "launch",
+      "url": "http://localhost:5173",
+      "webRoot": "${workspaceFolder}/src/frontend"
     }
   ]
 }