feat(postinstall): only update pkgfile if packages were installed; propagate flag from all package modules

modules/01-packages.sh

@@ -36,6 +36,7 @@ done
 
 if [ "${#to_install[@]}" -gt 0 ]; then
   paru -S --noconfirm "${to_install[@]}"
+  export DOTFILES_PACKAGES_UPDATED=1
 else
   echo "All packages already installed."
 fi

modules/05-sound.sh

@@ -25,6 +25,7 @@ done
 if [ "${#to_install[@]}" -gt 0 ]; then
   paru -S --noconfirm "${to_install[@]}"
   echo "Sound packages installed."
+  export DOTFILES_PACKAGES_UPDATED=1
 else
   echo "All sound packages already installed."
 fi

modules/06-hyprland.sh

@@ -33,6 +33,7 @@ done
 if [ "${#to_install[@]}" -gt 0 ]; then
   paru -S --noconfirm "${to_install[@]}"
   echo "Hyprland and related tools installed and configured."
+  export DOTFILES_PACKAGES_UPDATED=1
 else
   echo "All Hyprland and related tools already installed."
 fi

modules/07-browsers.sh

@@ -19,6 +19,7 @@ done
 if [ "${#to_install[@]}" -gt 0 ]; then
   paru -S --noconfirm "${to_install[@]}"
   echo "Browsers installed."
+  export DOTFILES_PACKAGES_UPDATED=1
 else
   echo "All browsers already installed."
 fi

modules/50-devtools.sh

@@ -28,6 +28,7 @@ done
 if [ "${#to_install[@]}" -gt 0 ]; then
   paru -S --noconfirm "${to_install[@]}"
   echo "Development tools installed."
+  export DOTFILES_PACKAGES_UPDATED=1
 else
   echo "All development tools already installed."
 fi

modules/99-postinstall.sh

@@ -2,15 +2,11 @@
 # Post-install steps for dotfiles setup
 
 # Update pkgfile database for command-not-found suggestions
-if command -v pkgfile &>/dev/null; then
+if command -v pkgfile &>/dev/null && [ "$DOTFILES_PACKAGES_UPDATED" = "1" ]; then
     echo "Updating pkgfile database..."
     sudo pkgfile --update
-fi
-
-# Rehash zsh command hash table so new executables are found
-if command -v zsh &>/dev/null; then
-    echo "Running zsh rehash..."
-    zsh -c 'rehash'
+else
+    echo "Skipping pkgfile update (no packages installed)."
 fi
 
 # Add other post-install steps here as needed