refactor: implement component-based architecture for enhanced maintainability

- Reorganize directory structure into core/, features/, and themes/
- Colocate application Nix logic, configs, scripts, and theme overrides
- Implement 'Inversion of Control' for theming: apps now pull theme-specific layouts
- Update flake.nix and shared library paths to match the new structure
- Document the new Feature-Centric architecture in README.md

themes/engine/stylix.nix

@@ -0,0 +1,101 @@
+{ config, pkgs, inputs, lib, ... }:
+
+# Stylix Integration Module
+#
+# This module handles base-level theming through Stylix:
+# - Color scheme injection from the active theme's palette
+# - Cursor configuration
+# - Font configuration
+# - GTK/GNOME theming
+#
+# App-specific theming is handled separately:
+# - theme-loader.nix: Deploys theme's apps/ configs (btop, neovim, etc.)
+# - waybar.nix: Generates waybar CSS from colorScheme
+# - hyprland.nix: Handles hyprland border colors
+#
+# Stylix targets disabled here (we have custom implementations):
+# - hyprland: Custom border/rule config
+# - waybar: Custom CSS with theme colors
+
+let
+  nomarchyLib = import ../lib { inherit lib; };
+  assetsPath = ../palettes;
+
+  activeThemeName = config.nomarchy.theme;
+
+  # Use shared wallpaper resolver
+  activeWallpaper = nomarchyLib.resolveWallpaper {
+    wallpaperPath = config.nomarchy.wallpaper;
+    themeName = activeThemeName;
+    inherit assetsPath;
+  };
+
+  # Get palette using shared library
+  currentPalette = nomarchyLib.getPalette activeThemeName;
+in
+{
+  imports = [ inputs.stylix.homeModules.stylix ];
+
+  stylix = {
+    enable = lib.mkDefault true;
+    enableReleaseChecks = lib.mkDefault false;
+    autoEnable = lib.mkDefault false;  # Disable auto-detection, explicitly enable targets
+    image = lib.mkDefault activeWallpaper;
+    base16Scheme = lib.mkDefault currentPalette;
+
+    # Use detected light mode state
+    polarity = lib.mkDefault (if config.nomarchy.isLightMode then "light" else "dark");
+
+    cursor = lib.mkDefault {
+      package = config.nomarchy.cursor.package;
+      name = config.nomarchy.cursor.name;
+      size = 24;
+    };
+
+    fonts = lib.mkDefault {
+      monospace = {
+        package = pkgs.nerd-fonts.jetbrains-mono;
+        name = config.nomarchy.fonts.monospace;
+      };
+      sansSerif = {
+        package = pkgs.dejavu_fonts;
+        name = "DejaVu Sans";
+      };
+      serif = {
+        package = pkgs.dejavu_fonts;
+        name = "DejaVu Serif";
+      };
+      emoji = {
+        package = pkgs.noto-fonts-color-emoji;
+        name = "Noto Color Emoji";
+      };
+      sizes = {
+        applications = 11;
+        terminal = 11;
+        desktop = 11;
+        popups = 11;
+      };
+    };
+
+    # Enable theming for specific targets
+    targets = lib.mkDefault {
+      hyprland.enable = false; # We keep our custom hyprland config for borders/rules
+      waybar.enable = false;   # We keep our custom waybar CSS
+      neovim.enable = false;   # We deploy theme lua files via theme-loader instead
+      neovide.enable = false;  # Neovide depends on neovim program module
+      alacritty.enable = true;
+      kitty.enable = true;
+      gtk.enable = true;
+      gnome.enable = true;
+    };
+  };
+
+  # GTK Icon Theme configuration
+  gtk = {
+    enable = lib.mkDefault true;
+    iconTheme = lib.mkDefault {
+      package = pkgs.yaru-theme;
+      name = config.nomarchy.iconsTheme;
+    };
+  };
+}