wezterm: support fancy_tab_bar (#564)

By default, the fancy tabbar doesn't respect colorschemes, see
https://github.com/wez/wezterm/issues/2615. But I've found that if you
set the tabbar colors in the config.lua in addition to the
colors/stylix.toml file, the fancy tabbar does respect the colors set.

This change doesn't affect the retro tab theming, which I made sure to
test.

modules/wezterm/hm.nix

@@ -58,9 +58,6 @@ in {
         local stylix_base_config = wezterm.config_builder()
         local stylix_user_config = stylix_wrapped_config()
         stylix_base_config = {
-            -- Set due to the default fancy tabs not respecting colorschemes
-            -- See https://github.com/wez/wezterm/issues/2615
-            use_fancy_tab_bar = false,
             color_scheme = "stylix",
             font = wezterm.font_with_fallback {
                 "${monospace.name}",
@@ -86,6 +83,32 @@ in {
                 inactive_titlebar_fg = "${base05}",
                 inactive_titlebar_border_bottom = "${base03}",
             },
+            colors = {
+              tab_bar = {
+                background = "${base01}",
+                inactive_tab_edge = "${base01}",
+                active_tab = {
+                  bg_color = "${base00}",
+                  fg_color = "${base05}",
+                },
+                inactive_tab = {
+                  bg_color = "${base03}",
+                  fg_color = "${base05}",
+                },
+                inactive_tab_hover = {
+                  bg_color = "${base05}",
+                  fg_color = "${base00}",
+                },
+                new_tab = {
+                  bg_color = "${base03}",
+                  fg_color = "${base05}",
+                },
+                new_tab_hover = {
+                  bg_color = "${base05}",
+                  fg_color = "${base00}",
+                },
+              },
+            },
             command_palette_bg_color = "${base01}",
             command_palette_fg_color = "${base05}",
             command_palette_font_size = ${builtins.toString sizes.popups},