refactor default apps and add walker

modules/capabilities/niri/default.nix

@@ -59,9 +59,6 @@ in
             brightnessctl
             xwayland-satellite
           ]
-          ++ [
-            config.meta.desktop.fileManager.package
-          ]
           ++ lib.attrValues shortcuts.scripts;
       };
 
@@ -139,13 +136,6 @@ in
               };
             clip-to-geometry = true;
           }
-          {
-            matches = [
-              { app-id = "^niri-shortcut-float$"; }
-            ];
-            open-floating = true;
-            open-focused = true;
-          }
         ];
 
         debug.honor-xdg-activation-with-invalid-serial = true;
@@ -163,9 +153,9 @@ in
         };
 
         binds = import ./_bindings.nix {
-          browserCommand = config.meta.desktop.browser.command;
-          launcherCommands = config.meta.desktop.launcher.commands;
-          terminalCommand = config.meta.desktop.terminal.command;
+          browserCommand = config.meta.desktop.browserCommand;
+          launcherCommand = config.meta.desktop.launcherCommand;
+          terminalCommand = config.meta.desktop.terminalCommand;
           shortcutCommands = shortcuts.commands;
         };
       };