Check the read half of the redirect rule at every door, not one

Three middleware answer before HandleInertiaRequests and so have to
repeat its 302→303 upgrade themselves: EnsureSetupIsComplete,
EnsureUserIsActive and EnforceTwoFactor. This file has a write case for
each, and the rule has a second half -- a read still gets a plain 302,
because a 303 there would be an upgrade nobody asked for.

That half was checked once, on the deactivation door, under a name that
said otherwise: "leaves a read alone in every one of those cases". The
setup door and the two-factor door were not covered at all, so a change
that upgraded reads at either of them would have gone through with the
suite green and this test's name still claiming it would not.

Both are covered now, as a dataset with one case per door. The setup case
reads a guest-reachable GET for the same reason the write case posts to
/timezone: anything behind `auth` is answered by the guest redirect before
EnsureSetupIsComplete sees it.

No production code changes; today all three doors answer a read with 302,
which is what the new cases assert. Demonstrated by mutation rather than
reversion: making EnsureSetupIsComplete upgrade every redirect to 303
fails this file (1 failed / 8 passed) and passes the old one (7 passed).

tests/Feature/Auth/WriteRedirectStatusTest.php

@@ -77,11 +77,43 @@ it('answers a write with 303 when two-factor enrolment is being enforced', funct
         ->assertRedirect(route('two-factor.show'));
 });
 
-it('leaves a read alone in every one of those cases', function () {
-    $user = User::factory()->create();
-    $user->update(['active' => false]);
+// The other half of the rule, and the half that says the upgrade is
+// targeted: a read still gets the plain 302. Once per door, because "every
+// one of those cases" was one of them — the deactivation — and a change
+// that upgraded reads at either of the other two would have been invisible
+// here while this name said otherwise.
+it('leaves a read alone at every one of those doors', function (Closure $arrange, string $read, Closure $target) {
+    $arrange();
 
-    $this->actingAs($user)->get(route('dashboard'))
+    $this->get($read)
         ->assertStatus(302)
-        ->assertRedirect(route('login'));
-});
+        ->assertRedirect($target());
+})->with([
+    // A guest-reachable GET, for the same reason the write case uses
+    // PUT /timezone: anything behind `auth` is answered by the guest
+    // redirect before EnsureSetupIsComplete ever sees it.
+    'no administrator yet' => [
+        fn () => User::query()->delete(),
+        '/login',
+        fn () => route('setup'),
+    ],
+    'deactivated mid-session' => [
+        function (): void {
+            $user = User::factory()->create();
+            $user->update(['active' => false]);
+            test()->actingAs($user);
+        },
+        '/dashboard',
+        fn () => route('login'),
+    ],
+    'two-factor enrolment enforced' => [
+        function (): void {
+            // Set explicitly rather than relying on the default: the
+            // settings cache outlives a database rollback in this suite.
+            app(Settings::class)->set(Setting::TwoFactorEnforcement, TwoFactorEnforcement::All->value);
+            test()->actingAs(User::factory()->create());
+        },
+        '/dashboard',
+        fn () => route('two-factor.show'),
+    ],
+]);