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>

bin/appearance/nomarchy-toggle-nightlight

@@ -3,23 +3,24 @@
 # Toggles the nightlight (hyprsunset).
 # Hybrid: updates state.json and provides instant feedback.
 
-STATE_FILE="$HOME/.config/home-manager/state.json"
-mkdir -p "$(dirname "$STATE_FILE")"
+STATE_DIR="$HOME/.config/nomarchy"
+STATE_FILE="$STATE_DIR/state.json"
+mkdir -p "$STATE_DIR"
 
 # Initialize if doesn't exist
 [[ ! -f $STATE_FILE ]] && echo "{}" > "$STATE_FILE"
 
-if [[ $NNOMARCHY_TOGGLE_NIGHTLIGHT == "false" ]]; then
+if [[ $NOMARCHY_TOGGLE_NIGHTLIGHT == "false" ]]; then
     NEW_VALUE="true"
     hyprctl dispatch exec hyprsunset --temperature 4000
-    notify-send -u low "󰔎  Nightlight enabled"
+    notify-send -u low "  Nightlight enabled"
 else
     NEW_VALUE="false"
     pkill hyprsunset
-    notify-send -u low "󰔎  Nightlight disabled"
+    notify-send -u low "  Nightlight disabled"
 fi
 
 TMP_JSON=$(mktemp)
-jq ".nightlight = $NEW_VALUE" "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
+jq --argjson val "$NEW_VALUE" '.nightlight = $val' "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
 
 echo "Nightlight state set to $NEW_VALUE. Environment will be fully updated on next rebuild."