From 101f199b33155c810de649cb52eb776b6c525c5c Mon Sep 17 00:00:00 2001
From: Darren Burns <darrenb900@gmail.com>
Date: Sat, 16 Nov 2024 00:12:07 +0000
Subject: [PATCH] Registering builtin themes on startup

---
 src/textual/app.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/textual/app.py b/src/textual/app.py
index 39ccaeccf9..55225474b2 100644
--- a/src/textual/app.py
+++ b/src/textual/app.py
@@ -530,6 +530,9 @@ def __init__(
         
         This excludes the built-in themes."""
 
+        for theme in BUILTIN_THEMES.values():
+            self.register_theme(theme)
+
         ansi_theme = (
             self.ansi_theme_dark if self.current_theme.dark else self.ansi_theme_light
         )
@@ -1228,7 +1231,7 @@ def available_themes(self) -> dict[str, Theme]:
 
         A dictionary mapping theme names to Theme instances.
         """
-        return {**BUILTIN_THEMES, **self._registered_themes}
+        return {**self._registered_themes}
 
     @property
     def current_theme(self) -> Theme: