Tint navigation arrows to match theme

app/gui/ui.py

@@ -328,6 +328,7 @@ class UIBuilderMixin:
     def _create_navigation_button(self, container, symbol: str, command, *, column: int) -> None:
         bg = self.root.cget("bg") if hasattr(self.root, "cget") else "#f2f2f7"
         container.grid_rowconfigure(0, weight=1)
+        fg = "#f5f5f5" if getattr(self, "theme", "light") == "dark" else "#1f1f1f"
         btn = tk.Button(
             container,
             text=symbol,
@@ -338,6 +339,8 @@ class UIBuilderMixin:
             background=bg,
             activebackground=bg,
             highlightthickness=0,
+            fg=fg,
+            activeforeground=fg,
             cursor="hand2",
             width=2,
         )