Add theme system: local themes, picker, static/dynamic mode

- blob_theme: apply local or shared themes, --dynamic recolors from
  the current wallpaper without changing it, --print saves the active
  theme's colors.toml (e.g. for a dynamic palette worth keeping)
- themes/: drop-in colors.toml files that install.sh syncs into
  Omarchy's theme dir, alongside any already-installed themes
- ThemePicker widget, walker menu, and Quick Settings tile mirroring
  the existing wallpaper picker, with color-swatch previews
- blob_wallpaper no longer forces dynamic mode on every wallpaper
  change; it only recolors if you're already in dynamic mode
- install.sh: fix a new-directory mkdir bug in backup_and_copy, and
  stop backing up wallpapers/themes (.bak dirs were showing up as
  fake entries in the picker) since both are pure git mirrors

Claude-Session: https://claude.ai/code/session_011kf23kB9NsaczSYazZsWs6

install.sh

@@ -69,7 +69,7 @@ backup_and_copy() {
     
     if [ ! -e "$dest" ]; then
         echo "[COPY] $name: New directory (creating)"
-        mkdir -p "$(dirname "$dest")"
+        mkdir -p "$dest"
         cp -r "$src"/* "$dest"/
         return
     fi
@@ -87,7 +87,7 @@ backup_and_copy() {
         rm -rf "$dest.bak"
         mkdir -p "$dest.bak"
         cp -r "$dest"/* "$dest.bak/" 2>/dev/null || true
-        
+
         echo "[COPY] $name: Overwriting (--force)"
         cp -r "$src"/* "$dest"/
     else
@@ -95,6 +95,40 @@ backup_and_copy() {
     fi
 }
 
+# Like backup_and_copy, but for destinations that are pure git-tracked
+# mirrors with no local state worth protecting (wallpapers, themes).
+# No .bak sibling is created — a stale one would otherwise show up
+# alongside the real thing (e.g. in the theme picker's directory scan).
+replace_and_copy() {
+    local src="$1"
+    local dest="$2"
+    local name="$3"
+
+    if [ ! -e "$dest" ]; then
+        echo "[COPY] $name: New directory (creating)"
+        mkdir -p "$dest"
+        cp -r "$src"/* "$dest"/
+        return
+    fi
+
+    local src_hash=$(compute_hash "$src")
+    local dest_hash=$(compute_hash "$dest")
+
+    if [ "$src_hash" = "$dest_hash" ]; then
+        echo "[SKIP] $name: Up to date"
+        return
+    fi
+
+    if [ "$FORCE" = true ]; then
+        echo "[COPY] $name: Replacing (--force)"
+        rm -rf "$dest"
+        mkdir -p "$dest"
+        cp -r "$src"/* "$dest"/
+    else
+        echo "[SKIP] $name: Has local changes (use --force to overwrite)"
+    fi
+}
+
 install_dependencies() {
     echo "=== Checking Dependencies ==="
     local deps_needed=()
@@ -146,10 +180,12 @@ check_file "$SCRIPT_DIR/ags/widget/Media.tsx" "$HOME_DIR/.config/ags/widget/Medi
 check_file "$SCRIPT_DIR/ags/widget/Notifications.tsx" "$HOME_DIR/.config/ags/widget/Notifications.tsx" "ags/widget/Notifications.tsx" || check_status=1
 check_file "$SCRIPT_DIR/ags/widget/QuickSettings.tsx" "$HOME_DIR/.config/ags/widget/QuickSettings.tsx" "ags/widget/QuickSettings.tsx" || check_status=1
 check_file "$SCRIPT_DIR/ags/widget/SysMonitor.tsx" "$HOME_DIR/.config/ags/widget/SysMonitor.tsx" "ags/widget/SysMonitor.tsx" || check_status=1
+check_file "$SCRIPT_DIR/ags/widget/ThemePicker.tsx" "$HOME_DIR/.config/ags/widget/ThemePicker.tsx" "ags/widget/ThemePicker.tsx" || check_status=1
 check_file "$SCRIPT_DIR/ags/widget/WallPicker.tsx" "$HOME_DIR/.config/ags/widget/WallPicker.tsx" "ags/widget/WallPicker.tsx" || check_status=1
 check_file "$SCRIPT_DIR/ags/widget/WidgetCard.tsx" "$HOME_DIR/.config/ags/widget/WidgetCard.tsx" "ags/widget/WidgetCard.tsx" || check_status=1
 check_file "$SCRIPT_DIR/waybar/style.css" "$HOME_DIR/.config/waybar/style.css" "waybar/style.css" || check_status=1
 check_file "$SCRIPT_DIR/elephant/menus/blob_background_selector.lua" "$HOME_DIR/.config/elephant/menus/blob_background_selector.lua" "elephant/menus/blob_background_selector.lua" || check_status=1
+check_file "$SCRIPT_DIR/elephant/menus/blob_theme_selector.lua" "$HOME_DIR/.config/elephant/menus/blob_theme_selector.lua" "elephant/menus/blob_theme_selector.lua" || check_status=1
 check_file "$SCRIPT_DIR/branding/about.txt" "$HOME_DIR/.config/omarchy/branding/about.txt" "branding/about.txt" || check_status=1
 check_file "$SCRIPT_DIR/branding/screensaver.txt" "$HOME_DIR/.config/omarchy/branding/screensaver.txt" "branding/screensaver.txt" || check_status=1
 
@@ -165,6 +201,14 @@ for script in "$SCRIPT_DIR/scripts"/*.sh; do
     fi
 done
 
+if [ -d "$SCRIPT_DIR/themes" ]; then
+    for theme_dir in "$SCRIPT_DIR/themes"/*/; do
+        [ -d "$theme_dir" ] || continue
+        theme_name=$(basename "$theme_dir")
+        check_file "$theme_dir/colors.toml" "$HOME_DIR/.config/omarchy/themes/$theme_name/colors.toml" "themes/$theme_name/colors.toml" || check_status=1
+    done
+fi
+
 echo ""
 
 if [ "$CHECK" = true ]; then
@@ -191,7 +235,15 @@ backup_and_copy "$SCRIPT_DIR/hypr" "$HOME_DIR/.config/hypr" "Hyprland config"
 backup_and_copy "$SCRIPT_DIR/branding" "$HOME_DIR/.config/omarchy/branding" "Branding files"
 backup_and_copy "$SCRIPT_DIR/elephant" "$HOME_DIR/.config/elephant" "Elephant configs"
 backup_and_copy "$SCRIPT_DIR/omarchy/hooks" "$HOME_DIR/.config/omarchy/hooks" "Omarchy hooks"
-backup_and_copy "$SCRIPT_DIR/wallpapers" "$HOME_DIR/wallpapers" "Custom wallpapers"
+replace_and_copy "$SCRIPT_DIR/wallpapers" "$HOME_DIR/wallpapers" "Custom wallpapers"
+
+if [ -d "$SCRIPT_DIR/themes" ]; then
+    for theme_dir in "$SCRIPT_DIR/themes"/*/; do
+        [ -d "$theme_dir" ] || continue
+        theme_name=$(basename "$theme_dir")
+        replace_and_copy "$theme_dir" "$HOME_DIR/.config/omarchy/themes/$theme_name" "Theme: $theme_name"
+    done
+fi
 
 zen_profile=$(find "$HOME_DIR/.config/zen" -maxdepth 1 -type d -name "*.Default (release)*" 2>/dev/null | head -n 1)
 if [ -n "$zen_profile" ]; then