refactor: major architectural restructure for theme-centric organization

Theme System:
- Move all theme app configs to apps/ subdirectory (20 themes)
- Add theme-loader.nix for dynamic theme config deployment
- Simplify stylix.nix to focus on base theming only

Override System:
- Add overrides.nix for file-based config overrides
- Add behavior-configs.nix for non-visual configuration
- Split hypr/nomarchy.conf into behavior vs visual sections

Module Improvements:
- Add lib.mkDefault to all customizable settings
- Add modules/lib/ with shared utilities and state schema
- Update all home and system modules for downstream overridability

Installer:
- New minimal TTY installer (installer/install.sh)
- Golden path: BTRFS + LUKS2 (disko-golden.nix)
- New installer-iso.nix for TTY-only installation
- Keep graphical installer as installerIsoGraphical option

Cleanup:
- Remove obsolete install.sh, disko-ext4.nix, install-nomarchy.sh
- Update live-iso.nix references
- Add .claude/ to .gitignore for local IDE settings

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

modules/home/configs.nix

@@ -2,54 +2,68 @@
 
 let
   configDir = ../../config;
-  
-  # Read the contents of the upstream config directory
-  configEntries = builtins.readDir configDir;
-  
+
+  # Explicit list of config items to manage
+  # This replaces dynamic builtins.readDir for clarity and faster evaluation
+  configItems = {
+    # Directories
+    btop = "directory";
+    chromium = "directory";
+    elephant = "directory";
+    "environment.d" = "directory";
+    fastfetch = "directory";
+    fcitx5 = "directory";
+    fontconfig = "directory";
+    ghostty = "directory";
+    git = "directory";
+    hypr = "directory";
+    "hyprland-preview-share-picker" = "directory";
+    imv = "directory";
+    kitty = "directory";
+    lazygit = "directory";
+    nomarchy = "directory";
+    opencode = "directory";
+    systemd = "directory";
+    tmux = "directory";
+    Typora = "directory";
+    uwsm = "directory";
+    wiremix = "directory";
+    xournalpp = "directory";
+
+    # Files
+    "brave-flags.conf" = "regular";
+    "chromium-flags.conf" = "regular";
+    "starship.toml" = "regular";
+    "xdg-terminals.list" = "regular";
+  };
+
+  # Files/directories handled elsewhere or not intended for ~/.config/
+  # - nomarchy.ttf: font file, not a config
+  # - waybar: handled in waybar.nix
+  # - walker: handled in walker.nix
+  # - alacritty: handled in alacritty.nix
+  # - swayosd: handled in swayosd.nix
+
   # Check for user overrides
   userConfigDir = config.nomarchy.configOverrides;
-  userEntries = if userConfigDir != null && builtins.pathExists userConfigDir
-                then builtins.readDir userConfigDir
-                else {};
-
-  # Files to explicitly exclude (handled elsewhere or not intended for ~/.config/)
-  excludedFiles = [
-    "nomarchy.ttf"
-    "waybar"
-    "walker"
-    "alacritty"
-    "swayosd"
-  ];
-  
-  # Get all unique names from both sources
-  allNames = lib.unique (builtins.attrNames configEntries ++ builtins.attrNames userEntries);
-  
-  # Filter the entries
-  validEntries = builtins.filter (name: !(builtins.elem name excludedFiles)) allNames;
+  hasUserOverrides = userConfigDir != null && builtins.pathExists userConfigDir;
 
   # Generate the xdg.configFile attribute set
-  # If a name exists in userEntries, it takes precedence.
-  # For directories, we use `recursive = true;` to allow the user to create their own files alongside the read-only defaults.
-  makeMapping = name: {
-    inherit name;
-    value = lib.mkDefault {
-      source = if userEntries ? ${name} 
-               then "${userConfigDir}/${name}" 
-               else "${configDir}/${name}";
-      recursive = (userEntries.${name} or configEntries.${name}) == "directory";
+  makeMapping = name: type:
+    let
+      hasUserOverride = hasUserOverrides && builtins.pathExists "${userConfigDir}/${name}";
+      source = if hasUserOverride then "${userConfigDir}/${name}" else "${configDir}/${name}";
+    in {
+      inherit name;
+      value = lib.mkDefault {
+        inherit source;
+        recursive = type == "directory";
+      };
     };
-  };
+
+  configMappings = lib.mapAttrs' (name: type: makeMapping name type) configItems;
 
 in
 {
-  xdg.configFile = (builtins.listToAttrs (map makeMapping validEntries)) // {
-    "nomarchy" = {
-      source = ../../config/nomarchy;
-      recursive = true;
-    };
-    "hypr" = {
-      source = ../../config/hypr;
-      recursive = true;
-    };
-  };
+  xdg.configFile = configMappings;
 }