feat(config): 🔧 Update model configuration and system packages

- Changed default model from `moonshot/kimi-k2-0711-preview` to
`z/glm-4.5`
- Added new provider configuration for Z AI with GLM-4.5 model
- Added hyprpolkitagent to Hyprland packages
- Updated Ollama models list (removed some Gemma models, added
qwen3-coder)
- Added chromium and playwright to system packages

nixos/hyprland.nix

@@ -19,6 +19,7 @@
     hyprlock
     hypridle
     hyprpaper
+    hyprpolkitagent
 
     inputs.wezterm.packages.${pkgs.system}.default
     kitty