feat: implement hybrid declarative state with automatic Nix sync

themes/engine/scripts/nomarchy-theme-set

@@ -34,13 +34,12 @@ if [ ! -d "$THEMES_DIR/$THEME_NAME" ]; then
   exit 1
 fi
 
-TMP_JSON=$(mktemp)
-jq --arg theme "$THEME_NAME" '.theme = $theme' "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
+nomarchy-state-write theme "$THEME_NAME"
 
 # Sync to system state if we have permissions (for system-level theming like browser policies)
 SYSTEM_STATE_FILE="/etc/nixos/state.json"
 if [ -w "$SYSTEM_STATE_FILE" ] || [ -w "/etc/nixos" ]; then
-    tmp=$(mktemp); sudo jq --arg theme "$THEME_NAME" '.theme = $theme' "$SYSTEM_STATE_FILE" > "$tmp" 2>/dev/null && sudo mv "$tmp" "$SYSTEM_STATE_FILE" 2>/dev/null || rm -f "$tmp"
+    nomarchy-state-write --file "$SYSTEM_STATE_FILE" theme "$THEME_NAME"
 fi
 
 # Try to find a background for this theme
@@ -48,17 +47,11 @@ BG_DIR="$THEMES_DIR/$THEME_NAME/backgrounds"
 if [ -d "$BG_DIR" ]; then
   BG=$(ls "$BG_DIR" | head -n 1)
   if [ -n "$BG" ]; then
-    TMP_JSON=$(mktemp)
-    jq --arg wp "$BG_DIR/$BG" '.wallpaper = $wp' "$STATE_FILE" > "$TMP_JSON" && mv "$TMP_JSON" "$STATE_FILE"
+    nomarchy-state-write wallpaper "$BG_DIR/$BG"
   fi
 fi
 
-echo "Theme set to $THEME_NAME."
-echo "NOTE: This change is TEMPORARY and will be lost on the next system rebuild."
-echo "To make this theme permanent, add the following to your /etc/nixos/home.nix:"
-echo "  nomarchy.theme = \"$THEME_NAME\";"
-echo ""
-echo "Applying changes with nomarchy-env-update..."
+echo "Theme set to $THEME_NAME. Applying changes with nomarchy-env-update..."
 
 if [[ "$NO_UPDATE" == "true" ]]; then
   echo "Skipping nomarchy-env-update due to --no-update flag."