feat: enable stricter typescript compiler options

frontend/app/icons.config.mjs

@@ -12,8 +12,9 @@
  * You should have received a copy of the GNU General Public License along with
  * this program. If not, see <https://www.gnu.org/licenses/>.
  */
-
-/** @type {import('./scripts/icon-config').IconConfig} */
+/**
+ * @type {import('./scripts/icon-config').IconConfig}
+ */
 const config = {
   inputPath: 'node_modules/material-symbols/material-symbols-rounded.woff2',
   outputPath: 'src/assets/icons.min.woff2',