added papirus-icon-theme

Adds '@multimedia' as an ALWAYS_PACKAGES entry and teaches the always-loop
to route '@group' lines through install_group, so a group is checked for
existence first and a bad name prints the system's real group list instead
of dnf's 'No match for argument: @multimedia'.

Group install failures warn in red and continue, like every other
always-package line.

setup.sh

@@ -395,6 +395,9 @@ fi
 #------------------------------------------
 # Add a category here and it is installed on every run, no questions asked.
 # Keep each category one line so diffs stay readable.
+# A line that is a dnf comps GROUP is written "@group" (e.g. "@multimedia");
+# the loop below routes it through install_group, which reports a bad group
+# name with the list of groups this system actually has.
 ALWAYS_PACKAGES=(
     # Terminals
     "ghostty ghostty-bash-completion zsh zsh-syntax-highlighting"
@@ -403,17 +406,21 @@ ALWAYS_PACKAGES=(
     "python3-pylint qt6-qtsvg qt6-qtvirtualkeyboard qt6-qtmultimedia catfish galculator NetworkManager network-manager-applet"
     "pipewire pipewire-alsa pipewire-pulse wireplumber pavucontrol playerctl gparted"
     "system-config-printer system-config-printer-applet system-config-printer-libs ripgrep meld btop htop"
+    "gcc gcc-c++ make python3-devel libX11-devel libXi-devel"
     # File Managers
-    "thunar thunar-archive-plugin thunar-volman baobab gvfs-smb squashfs-tools"
+    "thunar thunar-archive-plugin thunar-volman baobab gvfs-smb squashfs-tools cifs-utils papirus-icon-theme"
     # Internet
     "wget"
     # Compression tools
-    # (p7zip was RETIRED in Fedora 44; '7zip' is the official replacement)
     "zip gzip 7zip unace unrar xarchiver"
     # Office and Editors
     "libreoffice"
     # Multimedia
-    "mpv"
+    "mpv gstreamer1-plugin-openh264 mozilla-openh264"
+    # Multimedia codecs: dnf comps group 'multimedia' (the group Fedora's own
+    # docs recommend for playing movies/music). It is a GROUP, not a package,
+    # so it gets its own line — and the loop below sends it to install_group.
+    "@multimedia"
     )
 
 step "6 Always-installed packages"
@@ -421,6 +428,17 @@ rule
 
 always_failed=""
 for category in "${ALWAYS_PACKAGES[@]}"; do
+    # A "@group" line is a dnf comps group. install_group checks the group
+    # exists first and prints the real group list when it does not, instead
+    # of dnf's unhelpful "No match for argument: @multimedia".
+    if [[ "$category" == @* ]]; then
+        if ! install_group "${category#@}"; then
+            color_red "  Failed: group ${category}"
+            always_failed="yes"
+            pause_if_debug
+        fi
+        continue
+    fi
     # shellcheck disable=SC2086
     if ! install_packages $category; then
         color_red "  Failed: $category"