fix(stylix): drive GTK4/Qt dark-light from the palette via color-scheme

Stylix set polarity and the GTK theme but not the XDG portal's
org.freedesktop.appearance color-scheme, which GTK4/libadwaita and Qt6
apps actually read to choose dark vs light — so a light theme could still
render those apps dark (and vice-versa).

Set dconf org/gnome/desktop/interface color-scheme to
prefer-light/prefer-dark from theme.mode in stylix.nix.
xdg-desktop-portal-gtk already ships and programs.dconf is on system-side,
so the portal exposes it to apps.

Also log two branding follow-ups from the legacy assets: fastfetch ASCII
logo (logo.txt) and the Nomarchy.ttf glyph for the Waybar menu button.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.claude/settings.local.json

@@ -276,7 +276,8 @@
       "Bash(nix-instantiate --parse modules/nixos/default.nix)",
       "Bash(cp /nix/store/f18ij42lmpg07fn1m29aplayakx7kqpz-splash-test.png/* preview-splash-built.png)",
       "Bash(cp /nix/store/f18ij42lmpg07fn1m29aplayakx7kqpz-splash-test.png preview-splash-built.png)",
-      "Bash(nix-instantiate --parse hosts/live.nix)"
+      "Bash(nix-instantiate --parse hosts/live.nix)",
+      "Bash(nix-instantiate --parse modules/home/stylix.nix)"
     ]
   }
 }

README.md

@@ -325,6 +325,16 @@ close · `SUPER+1..9` workspaces · `Print` region screenshot.
   (needs a full grub theme dir), and the `distroId` question (it changes
   `DEFAULT_HOSTNAME` and upstream `isNixos` checks — needs a test pass;
   nixos-* CLI names stay regardless)
+- **fastfetch branding:** legacy ships an ASCII-art logo
+  (`core/branding/logo.txt` on the legacy branch) intended as the fastfetch
+  image. Vendor it, resize to a sensible terminal width, and color it from
+  the palette (accent), then wire a `fastfetch` config that uses it. (No
+  fastfetch config in v1 yet.)
+- **Nomarchy logo font in Waybar:** legacy's `core/branding/Nomarchy.ttf`
+  is a glyph font whose logo codepoint was used as the Waybar main-menu
+  button (e.g. the summer-night bar). Vendor the font, install it, and set
+  the `custom/nomarchy` button's `format` to that glyph (currently `󱄅`, a
+  Nerd Font icon) so the button shows the real Nomarchy mark.
 - **Theme-switch feedback:** ✓ the "rebuilding…" notification is now
   persistent (timeout 0) and replaced in place by "applied ✓" / failure
   via a synchronous tag, so a multi-minute switch never reads as a failed
@@ -402,11 +412,11 @@ close · `SUPER+1..9` workspaces · `Print` region screenshot.
   Waybar honours → all 10 rendered as phantoms. Dropped the block from
   `themes/summer-{day,night}/waybar.jsonc`; the other themes use the
   generated `waybar.nix`, which never had it, so they already match.
-- **GTK/Qt ignore the theme's light/dark mode:** `stylix.nix` sets
-  `polarity` from `theme.mode`, but GTK4/libadwaita apps (and Qt via the
-  portal) decide dark vs light from the `org.freedesktop.appearance
-  color-scheme` / gsettings `org.gnome.desktop.interface color-scheme` key,
-  which Stylix doesn't write — so a light theme can still render apps dark
-  (and vice-versa). Fix: set `dconf` `color-scheme` =
-  `prefer-dark`/`prefer-light` from `t.mode` (and confirm the
-  xdg-desktop-portal exposes it), so libadwaita/Qt follow the palette.
+- ✓ **GTK/Qt ignore the theme's light/dark mode:** Stylix set `polarity`
+  but not the `org.freedesktop.appearance color-scheme` that GTK4/libadwaita
+  and Qt6 read via the portal, so a light theme could still render apps
+  dark. `stylix.nix` now sets `dconf` `org/gnome/desktop/interface
+  color-scheme` = `prefer-light`/`prefer-dark` from `t.mode`
+  (xdg-desktop-portal-gtk already ships, and `programs.dconf` is on
+  system-side), so libadwaita/Qt follow the palette. Needs a live session
+  to confirm the portal picks it up for all apps.

modules/home/stylix.nix

@@ -86,5 +86,14 @@ in
         sizes.terminal = t.fonts.size;
       };
     };
+
+    # GTK4/libadwaita and Qt6 apps decide dark vs light from the XDG
+    # portal's color-scheme (org.freedesktop.appearance), which
+    # xdg-desktop-portal-gtk sources from this gsettings key. Stylix sets
+    # the GTK theme and `polarity` but not this, so a light theme still
+    # rendered libadwaita/Qt apps dark (and vice-versa). Drive it from the
+    # palette mode. (programs.dconf.enable is already on system-side.)
+    dconf.settings."org/gnome/desktop/interface".color-scheme =
+      if t.mode == "light" then "prefer-light" else "prefer-dark";
   };
 }