Add some sane defaults to Steam config

I can't imagine why we would not want compatibility on for all titles or why we would not want to have a good name and the correct path for the default library.

overlay/etc/cont-init.d/90-configure_steam.sh

@@ -18,15 +18,40 @@ Hidden=false
 EOF
 )"
 
+default_steam_config="$(
+    cat <<EOF
+"InstallConfigStore"
+{
+        "Software"
+        {
+                "Valve"
+                {
+                        "Steam"
+                        {
+                                "CompatToolMapping"
+                                {
+                                        "0"
+                                        {
+                                                "name"          "proton_hotfix"
+                                                "config"                ""
+                                                "priority"              "75"
+                                        }
+                                }
+                        }
+                }
+        }
+}
+EOF
+)"
+
 default_steam_library_config="$(
     cat <<EOF
 "libraryfolders"
 {
         "0"
         {
-                "path"          "/mnt/games"
+                "path"          "/home/default/.steam/steam"
-                "label"         "Games"
+                "label"         "Home"
-                "contentid"     "5581753361318374545"
                 "totalsize"     "0"
                 "update_clean_bytes_tally" "0"
                 "time_last_update_verified" "0"
@@ -34,6 +59,28 @@ default_steam_library_config="$(
                 {
                 }
         }
+        "1"
+        {
+                "path"          "/mnt/games/GameLibrary/Steam"
+                "label"         "Games"
+                "contentid"     "4532270033051814356"
+                "totalsize"     "0"
+                "update_clean_bytes_tally" "0"
+                "time_last_update_verified" "0"
+                "apps"
+                {
+                }
+        }
+}
+EOF
+)"
+
+games_steam_library_config="$(
+    cat <<EOF
+"libraryfolder"
+{
+        "contentid"     "4532270033051814356"
+        "label"         "Games"
 }
 EOF
 )"
@@ -49,13 +96,35 @@ if [ "${ENABLE_STEAM:-}" = "true" ]; then
         sed -i 's|^autostart.*=.*$|autostart=false|' /etc/supervisor.d/steam.ini
     fi
 
+    # Ensuring Steam Play is enabled for all titles
+    CONFIG_VDF="${USER_HOME:?}/.steam/steam/config/config.vdf"
+    if [ ! -f "${CONFIG_VDF}" ]; then
+        print_step_header "Initializing Steam config"
+        mkdir -p "$(dirname "${CONFIG_VDF}")"
+        echo "${default_steam_config}" >"${CONFIG_VDF}"
+        chown -R "${USER:?}:${USER:?}" "${USER_HOME:?}/.steam"
+    else
+        print_step_header "Steam config already exists, skipping initialization"
+    fi
+
     # Ensure Steam library folder is set to /mnt/games if not already
     LIBRARY_VDF="${USER_HOME:?}/.steam/steam/steamapps/libraryfolders.vdf"
-    if [ ! -f "${LIBRARY_VDF}" ] || ! grep -q '"0"' "${LIBRARY_VDF}"; then
+    if [ ! -f "${LIBRARY_VDF}" ]; then
-        print_step_header "Initializing Steam library folder"
+        print_step_header "Initializing Steam library"
         mkdir -p "$(dirname "${LIBRARY_VDF}")"
         echo "${default_steam_library_config}" >"${LIBRARY_VDF}"
-        chown "${USER:?}:${USER:?}" "${LIBRARY_VDF}"
+        chown -R "${USER:?}:${USER:?}" "${USER_HOME:?}/.steam"
+        # Only if we have mounted a /mnt/games path, then make the default games library for steam
+        if [ -d "/mnt/games" ]; then
+            mkdir -p "/mnt/games/GameLibrary/Steam/steamapps"
+            chown "${USER:?}:${USER:?}" \
+                "/mnt/games/GameLibrary" \
+                "/mnt/games/GameLibrary/Steam" \
+                "/mnt/games/GameLibrary/Steam/steamapps"
+            echo "${games_steam_library_config}" >"/mnt/games/GameLibrary/Steam/libraryfolder.vdf"
+        fi
+    else
+        print_step_header "Steam library config already exists, skipping initialization"
     fi
 else
     print_step_header "Disable Steam service"