Improve tracking UX, archive editing, branding, and proxy-safe auth flow

src/App.php

@@ -27,16 +27,24 @@ final class App
 
         $path = request_path();
         $method = $_SERVER['REQUEST_METHOD'] ?? 'GET';
+        $hasUsers = $this->users->hasAnyUsers();
+        $isAuthenticated = $this->auth->check();
 
-        if (!$this->users->hasAnyUsers()) {
-            if ($path !== '/setup') {
+        if (!$hasUsers) {
+            if ($path === '/login') {
+                $path = '/setup';
+            } elseif ($path !== '/setup') {
                 redirect('/setup');
             }
-        } elseif (!$this->auth->check() && $path !== '/login') {
-            redirect('/login');
+        } elseif (!$isAuthenticated) {
+            if ($path === '/setup') {
+                $path = '/login';
+            } elseif ($path !== '/login') {
+                redirect('/login');
+            }
         }
 
-        if ($this->auth->check() && in_array($path, ['/login', '/setup'], true)) {
+        if ($isAuthenticated && in_array($path, ['/login', '/setup'], true)) {
             redirect('/');
         }