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-theme-set

@@ -10,7 +10,7 @@ if [[ -z $THEME_NAME ]]; then
   exit 1
 fi
 
-STATE_DIR="$HOME/.config/home-manager"
+STATE_DIR="$HOME/.config/nomarchy"
 STATE_FILE="$STATE_DIR/state.json"
 
 # Resolve themes directory (Built-in from Nix store via Home Manager, or user extra)
@@ -25,17 +25,15 @@ mkdir -p "$STATE_DIR"
 
 if [ ! -d "$THEMES_DIR/$THEME_NAME" ] && ! [[ "$THEME_NAME" == "nord" ]]; then
   echo "Theme '$THEME_NAME' not found in $THEMES_DIR"
-  # Check if it exists in the palettes file
-  # (Assuming nomarchy-palettes.nix is imported in Nix)
 fi
 
 TMP_JSON=$(mktemp)
-jq ".theme = \"$THEME_NAME\"" "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
+jq --arg theme "$THEME_NAME" '.theme = $theme' "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
 
 # Sync to system state if we have permissions (for system-level theming like browser policies)
 SYSTEM_STATE_FILE="/etc/nixos/state.json"
 if [ -w "$SYSTEM_STATE_FILE" ] || [ -w "/etc/nixos" ]; then
-    sudo jq ".theme = \"$THEME_NAME\"" "$SYSTEM_STATE_FILE" > /tmp/system-state.json 2>/dev/null && sudo mv /tmp/system-state.json "$SYSTEM_STATE_FILE" 2>/dev/null || true
+    sudo jq --arg theme "$THEME_NAME" '.theme = $theme' "$SYSTEM_STATE_FILE" > /tmp/system-state.json 2>/dev/null && sudo mv /tmp/system-state.json "$SYSTEM_STATE_FILE" 2>/dev/null || true
 fi
 
 # Try to find a background for this theme
@@ -44,7 +42,7 @@ if [ -d "$BG_DIR" ]; then
   BG=$(ls "$BG_DIR" | head -n 1)
   if [ -n "$BG" ]; then
     TMP_JSON=$(mktemp)
-    jq ".wallpaper = \"$BG_DIR/$BG\"" "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
+    jq --arg wp "$BG_DIR/$BG" '.wallpaper = $wp' "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
   fi
 fi