fix Discord on macOS: use Homebrew cask instead of broken nixpkgs bundle

platforms/home-manager/modules/nmasur/presets/programs/homebrew.nix

@@ -27,6 +27,7 @@ in
       cask "notunes" # Don't launch Apple Music with the play button
       cask "topnotch" # Darkens the menu bar to complete black
       cask "ghostty" # Terminal application (not buildable on Nix on macOS)
+      cask "discord" # nixpkgs bundle breaks its notarization seal on macOS 26+
 
       # Mac App Store apps (requires 'mas' CLI, optional)
       # mas "Tailscale", id: 1475387142

platforms/home-manager/modules/nmasur/presets/services/dock.nix

@@ -56,7 +56,10 @@ in
           "/System/Applications/Mail.app"
           "/Applications/zoom.us.app"
           "${config.programs.ghostty.package}/Applications/Ghostty.app"
-          "${pkgs.discord}/Applications/Discord.app"
+          # Discord comes from Homebrew on macOS: the nixpkgs bundle is
+          # modified in place, breaking its notarization seal, so macOS 26+
+          # refuses to launch it ("damaged"). See presets/programs/homebrew.nix.
+          "/Applications/Discord.app"
           "${pkgs.obsidian}/Applications/Obsidian.app"
           "${pkgs.thunderbird}/Applications/Thunderbird.app"
         ];

platforms/nix-darwin/modules/nmasur/presets/services/dock.nix

@@ -50,7 +50,10 @@ in
         "/System/Applications/Mail.app"
         "/Applications/zoom.us.app"
         "/Applications/Ghostty.app"
-        "${pkgs.discord}/Applications/Discord.app"
+        # Discord comes from Homebrew on macOS: the nixpkgs bundle is modified
+        # in place, breaking its notarization seal, so macOS 26+ refuses to
+        # launch it ("damaged").
+        "/Applications/Discord.app"
         "${pkgs.obsidian}/Applications/Obsidian.app"
         "${pkgs.thunderbird}/Applications/Thunderbird.app"
       ];