refactor(auth): replace dashboard sessions with stateless tokens and session control (#6329)

* refactor(auth): replace dashboard sessions with stateless tokens

* feat(auth): harden session issuance and distributed enforcement

* fix(proxy): preserve trusted proxy compatibility defaults

* refactor: address dashboard auth review feedback

* refactor: remove classic frontend and flatten web app

.dockerignore

@@ -8,8 +8,5 @@ docs
 .eslintcache
 .gocache
 /web/node_modules
-/web/default/node_modules
-/web/default/dist
-/web/classic/node_modules
-/web/classic/dist
+/web/dist
 !THIRD-PARTY-LICENSES.md