fix(15-01): remove style=display:none from #driver-list in printers_new.html

HTMX outerHTML swap target was hidden — upload confirmation (driver name + table)
was invisible to technician despite server returning correct fragment. Single-line
removal on line 98; no other files modified.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

imptune/templates/printers_new.html

@@ -95,6 +95,6 @@
     </label>
     <button type="submit" class="secondary" x-text="$store.i18n.t('upload_driver')">Upload Driver</button>
   </form>
-  <div id="driver-list" style="display:none"></div>
+  <div id="driver-list"></div>
 </div>
 {% endblock %}