fix(launcher): remove ghost Flowbite close btn; add working Close btn in footer

The Flowbite Dialog component (which Drawer wraps internally) renders a
<CloseButton type='submit'> by default when dismissable=true. Since the
Drawer does not use the form/dialog mechanism, that button appeared at the
bottom of the drawer but did nothing. Fix: dismissable={false} on the cfg
Drawer suppresses it.

launcher_cfg.svelte footer redesigned:
- Lower-left: Close button (always visible) — mirrors top-right X, useful
  when the user has scrolled down through long config sections
- Lower-right: Reload (always visible, shorter label)
- Full-width Debug Panel button (edit_mode only, below the row)

Click-outside behavior unchanged — Flowbite Dialog outsideclose defaults
to true, so tapping outside the drawer still closes it.

src/routes/events/[event_id]/(launcher)/launcher/+layout.svelte

@@ -874,6 +874,7 @@
 </div>
 
 <Drawer
+    dismissable={false}
     class="bg-orange-50 dark:bg-slate-800 opacity-90 hover:opacity-97 transition-all duration-300 border border-gray-300 dark:border-gray-600 w-full md:w-96 lg:w-[32rem]"
     placement="left"
     {...{