[6.x] Fix TypeError when elevated_session_duration is a string (#14771)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: duncanmcclean

src/Providers/AppServiceProvider.php

@@ -357,7 +357,7 @@ private function registerElevatedSessionMacros()
             }
 
             return Carbon::createFromTimestamp($lastElevated)
-                ->addMinutes(config('statamic.users.elevated_session_duration', 15))
+                ->addMinutes((float) config('statamic.users.elevated_session_duration', 15))
                 ->timestamp;
         });
 

tests/Auth/ElevatedSessionTest.php

@@ -76,6 +76,26 @@ public function it_can_get_status_of_elevated_session()
             ]);
     }
 
+    /**
+     * @see https://github.com/statamic/cms/pull/14771
+     **/
+    #[Test]
+    public function it_handles_string_config_value_for_elevated_session_duration()
+    {
+        config(['statamic.users.elevated_session_duration' => '15.5']);
+
+        $this
+            ->withElevatedSession(now()->subMinutes(5))
+            ->actingAs($this->user)
+            ->get('/cp/elevated-session')
+            ->assertOk()
+            ->assertJson([
+                'elevated' => true,
+                'expiry' => now()->addMinutes(10.5)->timestamp,
+                'method' => 'password_confirmation',
+            ]);
+    }
+
     #[Test]
     public function it_can_get_status_of_elevated_session_when_session_key_does_not_exist()
     {