Use Lucide palette icons

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: MariusStorhaug

.github/zensical.toml

@@ -41,7 +41,7 @@ link = "material/link-variant"
 # Palette toggle for automatic mode
 [[project.theme.palette]]
 media = "(prefers-color-scheme)"
-toggle.icon = "material/link"
+toggle.icon = "lucide/sun-moon"
 toggle.name = "Switch to dark mode"
 
 # Palette toggle for dark mode
@@ -50,7 +50,7 @@ media = "(prefers-color-scheme: dark)"
 scheme = "slate"
 primary = "black"
 accent = "light blue"
-toggle.icon = "material/toggle-switch-off-outline"
+toggle.icon = "lucide/moon"
 toggle.name = "Switch to light mode"
 
 # Palette toggle for light mode
@@ -59,7 +59,7 @@ media = "(prefers-color-scheme: light)"
 scheme = "default"
 primary = "black"
 accent = "light blue"
-toggle.icon = "material/toggle-switch"
+toggle.icon = "lucide/sun"
 toggle.name = "Switch to system preference"
 
 [project.plugins.meta]