feat: add niri, zsh, and daily-use packages

- Add niri compositor with full default config (niri.kdl)
  - tap-to-click, natural-scroll, scroll-factor 0.3
  - waybar, xwayland-satellite, mako autostart
  - kitty as default terminal, fuzzel as launcher
- Add zsh as default shell with autosuggestions, syntax highlighting
- Add starship prompt, zoxide with zsh integration
- Add plasma-manager for declarative KDE dark theme and touchpad settings
- Add zen-browser and claude-desktop via community flakes
- Add vscodium, kitty, foot, fuzzel, waybar, mako, wl-clipboard
- Add swaylock, swayidle, xwayland-satellite for Niri session
- Add daily apps: mpv, imv, grim, slurp, libreoffice, telegram-desktop
- Add CLI tools: btop, ripgrep, fzf, eza, bat, gh
- Set NIXOS_OZONE_WL=1 for Electron apps Wayland and fcitx5 support
- Enable security.polkit for privilege escalation in Niri
- Fix home-manager fontconfig nodePackages bug
- Fix git deprecated userName/userEmail options

flake.nix

@@ -7,17 +7,34 @@
       url = "github:nix-community/home-manager/release-26.05";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    plasma-manager = {
+      url = "github:nix-community/plasma-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+      inputs.home-manager.follows = "home-manager";
+    };
+    zen-browser = {
+      url = "github:youwen5/zen-browser-flake";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    claude-desktop.url = "github:k3d3/claude-desktop-linux-flake";
   };
 
-  outputs = { self, nixpkgs, home-manager, ... }: {
+  outputs = { self, nixpkgs, home-manager, plasma-manager, zen-browser, claude-desktop, ... }: {
     nixosConfigurations.nixos = nixpkgs.lib.nixosSystem {
       system = "x86_64-linux";
       modules = [
         ./hosts/nixos/configuration.nix
         home-manager.nixosModules.home-manager
         {
+          nixpkgs.overlays = [
+            (_: _: {
+              zen-browser = zen-browser.packages.x86_64-linux.default;
+              claude-desktop = claude-desktop.packages.x86_64-linux.default;
+            })
+          ];
           home-manager.useGlobalPkgs = true;
           home-manager.useUserPackages = true;
+          home-manager.sharedModules = [ plasma-manager.homeModules.plasma-manager ];
           home-manager.users.duynguyen = import ./home/duynguyen/default.nix;
         }
       ];