feat: Update branding terminology and improve settings dialog for logo management

tests/unit/test_branding_manager.py

@@ -72,3 +72,28 @@ def test_config_from_env_uses_persisted_active_branding(tmp_path, monkeypatch):
     assert config.active_branding_id == "agravity"
     assert config.app_name == "Agravity Bridge"
     assert config.get_config_path().name == "config.json"
+
+
+def test_switching_back_to_default_restores_default_branding(tmp_path):
+    """Switching from a custom branding back to default should restore the default name."""
+    manager = BrandingManager(base_dir=tmp_path)
+    config = Config(
+        app_name="WebDrop Bridge",
+        app_version="1.0.0",
+        log_level="INFO",
+        log_file=None,
+        allowed_roots=[],
+        allowed_urls=[],
+        webapp_url="http://localhost:8080",
+        enable_logging=True,
+        active_branding_id="agravity",
+    )
+
+    manager.apply_to_config(config)
+    assert config.app_name == "Agravity Bridge"
+
+    config.active_branding_id = "default"
+    manager.apply_to_config(config)
+
+    assert config.app_name == "WebDrop Bridge"
+    assert config.branding_display_name == "Default"