fix: enhance integration tests for ElevatedButton styles and conflicts

Author: ndonkoHenri

sdk/python/packages/flet/integration_tests/controls/golden/macos/elevated_button/elevated_button_basic.png renamed to sdk/python/packages/flet/integration_tests/controls/golden/macos/elevated_button/basic.png

@@ -5,7 +5,7 @@
 
 
 @pytest.mark.asyncio(loop_scope="module")
-async def test_elevated_button_basic(flet_app: ftt.FletTestApp, request):
+async def test_basic(flet_app: ftt.FletTestApp, request):
     flet_app.page.theme_mode = ft.ThemeMode.LIGHT
     await flet_app.assert_control_screenshot(
         request.node.name,
@@ -32,3 +32,44 @@ async def test_issue_5538(flet_app: ftt.FletTestApp, request):
             ]
         ),
     )
+
+
+@pytest.mark.asyncio(loop_scope="module")
+async def test_button_style(flet_app: ftt.FletTestApp, request):
+    flet_app.page.theme_mode = ft.ThemeMode.LIGHT
+    await flet_app.assert_control_screenshot(
+        request.node.name,
+        ft.ElevatedButton(
+            content="Test Button",
+            style=ft.ButtonStyle(
+                bgcolor=ft.Colors.BLUE,
+                shape=ft.RoundedRectangleBorder(radius=10),
+                side=ft.BorderSide(width=3, color=ft.Colors.YELLOW),
+                padding=ft.Padding.all(20),
+                text_style=ft.TextStyle(
+                    size=15,
+                    weight=ft.FontWeight.BOLD,
+                    color=ft.Colors.WHITE,
+                ),
+            ),
+        ),
+    )
+
+
+@pytest.mark.asyncio(loop_scope="module")
+async def test_button_style_conflicts(flet_app: ftt.FletTestApp, request):
+    flet_app.page.theme_mode = ft.ThemeMode.LIGHT
+    await flet_app.assert_control_screenshot(
+        request.node.name,
+        ft.ElevatedButton(
+            content="Test Button",
+            elevation=10,
+            color=ft.Colors.BLACK,
+            bgcolor=ft.Colors.BLUE,
+            style=ft.ButtonStyle(
+                elevation=2,
+                color=ft.Colors.WHITE,
+                bgcolor=ft.Colors.RED,
+            ),
+        ),
+    )