Authentication improvements (#21194)

* jwt permissions

* add old password to body req

* add model and migration

need to track the datetime that passwords were changed for the jwt

* auth api backend changes

- use os.open to create jwt secret with restrictive permissions (0o600: read/write for owner only)
- add backend validation for password strength
- add iat claim to jwt so the server can determine when a token was issued and reject any jwts issued before a user's password_changed_at timestamp, ensuring old tokens are invalidated after a password change
- set logout route to public to avoid 401 when logging out
- issue new jwt for users who change their own password so they stay logged in

* improve set password dialog

- add field to verify old password
- add password strength requirements

* frontend tweaks for password dialog

* i18n

* use verify endpoint for existing password verification

avoid /login side effects (creating a new session)

* public logout

* only check if password has changed on jwt refresh

* fix tests

Fix migration 030 by using raw sql to select usernames (avoid ORM selecting nonexistent columns)

* add multi device warning to password dialog

* remove password verification endpoint

Just send old_password + new password in one request, let the backend handle verification in a single operation

docs/docs/configuration/reference.md

@@ -123,7 +123,7 @@ auth:
   # Optional: Refresh time in seconds (default: shown below)
   # When the session is going to expire in less time than this setting,
   # it will be refreshed back to the session_length.
-  refresh_time: 43200 # 12 hours
+  refresh_time: 1800 # 30 minutes
   # Optional: Rate limiting for login failures to help prevent brute force
   # login attacks (default: shown below)
   # See the docs for more information on valid values