chore: complete OOTB QA audit

Fixes identified during the thorough distro review:
- Restore automatic wallpaper switching by removing image filters from deployed themes.
- Fix broken 'Style' menu entries by creating missing about.txt and screensaver.txt branding files.
- Clean up conflicting keybindings by removing deprecated tiling.conf and updating doc generator.
- Remove legacy Nord theme hack from nomarchy-theme-set.
- Fix JSON parse error in summer-day waybar theme.

themes/engine/files.nix

@@ -74,21 +74,13 @@ in
   xdg.configFile."nomarchy/branding/logo.svg".source = ../../core/branding/logo.svg;
   xdg.configFile."nomarchy/branding/icon.png".source = ../../core/branding/icon.png;
   xdg.configFile."nomarchy/branding/icon.txt".source = ../../core/branding/icon.txt;
+  xdg.configFile."nomarchy/branding/screensaver.txt".source = ../../core/branding/screensaver.txt;
+  xdg.configFile."nomarchy/branding/about.txt".source = ../../core/branding/about.txt;
 
   # Expose all themes to the system via local share for script accessibility
-  # We filter out images to prevent Nix Store bloat
   xdg.dataFile."nomarchy/themes".source = builtins.path {
-    name = "nomarchy-themes-no-images";
+    name = "nomarchy-themes";
     path = ../palettes;
-    filter = path: type: 
-      let 
-        baseName = baseNameOf path;
-      in
-        ! (type == "regular" && (
-          lib.hasSuffix ".jpg" baseName || 
-          lib.hasSuffix ".png" baseName || 
-          lib.hasSuffix ".jpeg" baseName
-        ));
   };
 
   # Nautilus python extensions

themes/engine/scripts/nomarchy-theme-set

@@ -29,7 +29,7 @@ fi
 mkdir -p "$STATE_DIR"
 [[ ! -f $STATE_FILE ]] && echo "{}" > "$STATE_FILE"
 
-if [ ! -d "$THEMES_DIR/$THEME_NAME" ] && ! [[ "$THEME_NAME" == "nord" ]]; then
+if [ ! -d "$THEMES_DIR/$THEME_NAME" ]; then
   echo "Theme '$THEME_NAME' not found in $THEMES_DIR"
 fi