hyprland: replace bundled waybar config with a minimal Hyprland one

The bundled waybar config assumes sway and pulls in modules that don't
apply here (battery, backlight, sway/*), tries to read /dev/input/* the
user can't open, and crashes the media module — which surfaced as
"media stopped unexpectedly" and an unrendered bar.

Switch to programs.waybar with our own settings: hyprland/workspaces,
clock, pulseaudio, network, tray. No IP, no CPU/RAM, no temp, no power
profile. Style is a thin transparent bar, white-on-grey workspace
numbers, FiraMono Nerd Font for the volume/network glyphs.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

settings/hyprland.nix

@@ -33,7 +33,6 @@
 
     environment.systemPackages = with pkgs; [
       ghostty
-      waybar
       fuzzel
       mako
       grim
@@ -234,6 +233,114 @@
         wallpaper = ,${config.home.homeDirectory}/.local/share/backgrounds/wallpaper.png
         splash = false
       '';
+
+      programs.waybar = {
+        enable = true;
+
+        settings.mainBar = {
+          layer = "top";
+          position = "top";
+          height = 30;
+          spacing = 6;
+
+          modules-left   = [ "hyprland/workspaces" ];
+          modules-center = [ "clock" ];
+          modules-right  = [ "pulseaudio" "network" "tray" ];
+
+          "hyprland/workspaces" = {
+            format = "{name}";
+            on-click = "activate";
+            sort-by-number = true;
+          };
+
+          clock = {
+            format = "{:%H:%M}";
+            tooltip-format = "<big>{:%A, %d %B %Y}</big>\n<tt><small>{calendar}</small></tt>";
+          };
+
+          pulseaudio = {
+            format = "{icon} {volume}%";
+            format-muted = "  muted";
+            format-icons = {
+              default = [ "" "" "" ];
+              headphone = "";
+              headset = "";
+            };
+            on-click = "pavucontrol";
+            scroll-step = 5;
+          };
+
+          network = {
+            format-wifi = "  {essid}";
+            format-ethernet = "";
+            format-disconnected = "";
+            tooltip-format = "{ifname}";
+            on-click = "nm-connection-editor";
+          };
+
+          tray = {
+            icon-size = 16;
+            spacing = 8;
+          };
+        };
+
+        style = ''
+          * {
+            font-family: "FiraMono Nerd Font", monospace;
+            font-size: 13px;
+            min-height: 0;
+            border: none;
+            border-radius: 0;
+          }
+
+          window#waybar {
+            background: rgba(20, 20, 20, 0.82);
+            color: #e8e8e8;
+          }
+
+          #workspaces {
+            margin-left: 6px;
+          }
+
+          #workspaces button {
+            padding: 0 8px;
+            color: #6e6e6e;
+            background: transparent;
+          }
+
+          #workspaces button.active {
+            color: #ffffff;
+          }
+
+          #workspaces button:hover {
+            background: rgba(255, 255, 255, 0.06);
+            color: #ffffff;
+            box-shadow: none;
+            text-shadow: none;
+          }
+
+          #clock {
+            color: #ffffff;
+            font-weight: 500;
+          }
+
+          #pulseaudio,
+          #network,
+          #tray {
+            padding: 0 10px;
+            color: #e8e8e8;
+          }
+
+          #pulseaudio.muted,
+          #network.disconnected {
+            color: #6e6e6e;
+          }
+
+          #tray {
+            margin-right: 6px;
+          }
+        '';
+      };
     };
   };
 }