Merge pull request Textualize#1413 from Textualize/not-ugly

Not ugly

src/textual/app.py

@@ -368,6 +368,7 @@ def __init__(
         self._screenshot: str | None = None
         self._dom_lock = asyncio.Lock()
         self._dom_ready = False
+        self.set_class(self.dark, "-dark-mode")
 
     @property
     def return_value(self) -> ReturnType | None:

src/textual/widget.py

@@ -2179,11 +2179,7 @@ def refresh(
             for ancestor in self.ancestors:
                 if not isinstance(ancestor, Widget):
                     break
-                if ancestor.styles.auto_dimensions:
-                    for ancestor in self.ancestors_with_self:
-                        if isinstance(ancestor, Widget):
-                            ancestor._clear_arrangement_cache()
-                    break
+                ancestor._clear_arrangement_cache()
 
         if repaint:
             self._set_dirty(*regions)

src/textual/widgets/_header.py

@@ -91,13 +91,13 @@ class Header(Widget):
     Header {
         dock: top;
         width: 100%;
-        background: $secondary-background;
+        background: $foreground 5%;
         color: $text;
         height: 1;
     }
     Header.-tall {
         height: 3;
-    }
+    }    
     """
 
     tall = Reactive(False)

tests/test_test_runner.py

@@ -12,7 +12,9 @@ def on_key(self, event: events.Key) -> None:
 
     app = TestApp()
     async with app.run_test() as pilot:
-        assert str(pilot) == "<Pilot app=TestApp(title='TestApp')>"
+        assert (
+            str(pilot) == "<Pilot app=TestApp(title='TestApp', classes={'-dark-mode'})>"
+        )
         await pilot.press("tab", *"foo")
         await pilot.pause(1 / 100)
         await pilot.exit("bar")