fix(fish): fit the fastfetch greeting to the terminal width

The greeting always drew the full NixOS logo beside the info block,
which overflows in a narrow terminal. Choose the logo by column count:
the full logo when it fits, the compact one when it does not, and none
below that.

CLAUDE.md

@@ -109,3 +109,8 @@ The domain model (Host, Module, Skeleton, Auto-loader, Enable convention, overla
   To actually remove a builtin, list it explicitly with `<engine>.metaData.hidden = true` — an engine entry carrying only `metaData` is treated as a builtin rather than a custom engine.
   Engines are referenced by their current id, which the module maps from the old display names, so the default is `default = "ddg"`, not `"DuckDuckGo"` (the latter only warns and migrates).
   Prove the result by decoding the built file: `mozlz4a -d <search.json.mozlz4>` shows the `_metaData.hidden` flags and `defaultEngineId`.
+- `home.sessionVariables` do **not** reach the Hyprland session, so anything the compositor reads from its environment (cursor theme, toolkit hints) has to be declared elsewhere.
+  home-manager writes those variables to `hm-session-vars.sh`, which only a login shell sources; UWSM starts the graphical session without it, so the compositor's environment never gains them.
+  This is why a Stylix cursor (`XCURSOR_THEME`/`XCURSOR_SIZE` via `home.pointerCursor`) silently fails to apply and Hyprland draws its built-in cursor: the variables exist in `sessionVariables` but not in the running session (`tr '\0' '\n' < /proc/$(pgrep -x Hyprland)/environ` shows them absent).
+  The fix is Hyprland's own `env = KEY,VALUE` directive in `settings`, read at compositor startup regardless of the shell profile; `modules/desktop/hyprland/hyprland.nix` sets the cursor that way, sourced from `config.stylix.cursor`.
+  Bibata ships XCursor format only (no `hyprcursor/` dir), which Hyprland renders through its XCursor fallback, so both `XCURSOR_*` and `HYPRCURSOR_*` naming the same theme are safe.

modules/desktop/firefox.nix

@@ -65,6 +65,13 @@ in
             };
 
           settings = {
+            # Scale the UI and page by a fixed factor. Left at auto (-1),
+            # Firefox reads the panel's 1.5x and inflates its whole chrome on
+            # this display while point-sized apps stay put; a shade under that
+            # brings it into line without dropping to true 1:1, which reads too
+            # small at this DPI.
+            "layout.css.devPixelsPerPx" = "1.25";
+
             # Auto-enable the sideloaded Firefox Color add-on that carries the
             # Nord chrome theme, which Firefox otherwise leaves disabled.
             # The functional extensions come through policy and are unaffected.

modules/desktop/hyprland/hyprland.nix

@@ -8,6 +8,7 @@
 let
   cfg = config.modules.desktop.hyprland;
   user = config.user.name;
+  cursor = config.stylix.cursor;
 
   # Numbered-workspace switch and move for 1..9, the operator's i3 muscle memory.
   workspaceBinds = lib.concatMap (n: [
@@ -62,6 +63,19 @@ in
         "$mod" = "SUPER";
         "$terminal" = "alacritty";
 
+        # Hand the cursor theme to the compositor directly. UWSM launches the
+        # session without the shell profile that carries the pointer-cursor
+        # variables, so without this Hyprland never sees a theme and falls back
+        # to its built-in cursor. Bibata ships XCursor only; the hyprcursor
+        # variables name the same theme, which Hyprland resolves through its
+        # XCursor fallback.
+        env = lib.optionals (cursor != null) [
+          "XCURSOR_THEME,${cursor.name}"
+          "XCURSOR_SIZE,${toString cursor.size}"
+          "HYPRCURSOR_THEME,${cursor.name}"
+          "HYPRCURSOR_SIZE,${toString cursor.size}"
+        ];
+
         input = {
           kb_layout = "us";
           # Caps is a second Escape.

modules/desktop/theming.nix

@@ -34,13 +34,26 @@ in
 
       cursor = {
         package = pkgs.bibata-cursors;
+        # Solid white with a dark outline, so it stays easy to spot against the
+        # dark Nord wallpaper.
         name = "Bibata-Modern-Ice";
         size = 24;
       };
 
-      fonts.monospace = {
-        package = pkgs.jetbrains-mono;
-        name = "JetBrains Mono";
+      fonts = {
+        monospace = {
+          package = pkgs.jetbrains-mono;
+          name = "JetBrains Mono";
+        };
+
+        # A step below Stylix's defaults (applications 12, desktop/popups 10,
+        # terminal 12), which read oversized on this display.
+        sizes = {
+          applications = 10;
+          desktop = 9;
+          popups = 9;
+          terminal = 10;
+        };
       };
     };
 

modules/fish/fish.nix

@@ -84,7 +84,18 @@ in
         };
 
         functions = {
-          fish_greeting = "fastfetch";
+          # Pick the logo that fits the terminal so the greeting never wraps:
+          # the full logo needs about 118 columns beside the info block, the
+          # compact one about 89, and the info block alone about 71.
+          fish_greeting = ''
+            if test "$COLUMNS" -ge 118
+                fastfetch
+            else if test "$COLUMNS" -ge 89
+                fastfetch --logo NixOS_small
+            else
+                fastfetch --logo none
+            end
+          '';
 
           # vi insert mode omits the emacs ctrl-f and ctrl-r bindings, so
           # restore both.