added zsh configs and other configs

modules/apps/browser.nix

@@ -1,7 +1,5 @@
-{ pkgs, ... }:
+{ ... }:
 
 {
-    environment.systemPackages = with pkgs; [
-        brave
-    ];
+    # Browser is configured and managed via Home Manager (home/brave.nix)
 }

modules/apps/communication.nix

@@ -2,6 +2,7 @@
 
 {
     environment.systemPackages = with pkgs; [
-        discord
+        vesktop
+        signal-desktop
     ];
 }

modules/apps/dev.nix

@@ -3,9 +3,9 @@
 {
     environment.systemPackages = with pkgs; [
         neovim
-        git
         uv
         rustup
+        ghidra
         antigravity-cli
         pi-coding-agent
     ];

modules/apps/terminal.nix

@@ -1,8 +1,8 @@
 { pkgs, ... }:
 
 {
+    # Foot terminal is configured and managed via Home Manager (home/foot.nix)
     environment.systemPackages = with pkgs; [
-        foot 
         zoxide
         fzf
     ];

modules/core/system.nix

@@ -22,12 +22,12 @@
         git
         curl
         wget
-        vim
         btop
         gparted
         pciutils
         usbutils
         egl-wayland
+        pulseaudio # Provides `pactl` for audio volume control bindings
     ];
 
     system.stateVersion = "26.05";