Svelte: fix 3 svelte-check warnings (non-IDAA) + Playwright test type error

- ae_comp__badge_print_controls: select_ref_badge_type declared as $state()
  so Svelte 5 tracks DOM ref assignment correctly (was plain let).
- launcher_cfg_section: <svelte:component this={icon}> replaced with
  let Icon = $derived(icon) + <Icon /> — svelte_component_deprecated fix.
- launcher_file_cont: same svelte_component_deprecated fix for FileIcon.
- badge_print_layout.test.ts: inject_idb signature changed from (badge, template)
  to ({ badge, template }) — page.evaluate() passes exactly one argument;
  all three call sites updated to pass { badge: mock_badge, template: mock_template }.

src/routes/events/[event_id]/(badges)/badges/[badge_id]/ae_comp__badge_print_controls.svelte

@@ -293,7 +293,7 @@
     let input_ref_location:       HTMLInputElement    | undefined;
     let input_ref_pronouns:       HTMLInputElement    | undefined;
     let input_ref_allow_tracking: HTMLInputElement    | undefined;
-    let select_ref_badge_type:    HTMLSelectElement   | undefined;
+    let select_ref_badge_type:    HTMLSelectElement   | undefined = $state();
 
     $effect(() => {
         const field = active_field;

src/routes/events/[event_id]/(launcher)/cfg_components/launcher_cfg_section.svelte

@@ -26,6 +26,9 @@
         on_toggle
     }: Props = $props();
 
+    // Uppercase alias required: Svelte 5 treats lowercase tags as HTML elements.
+    let Icon = $derived(icon);
+
     function toggle_expand() {
         if (state === 'collapsed') {
             state = 'auto';
@@ -72,8 +75,7 @@
         onclick={toggle_expand}
     >
         <div class="flex items-center gap-3">
-            <svelte:component
-                this={icon}
+            <Icon
                 size="1em"
                 class="w-5 text-center opacity-70 {state === 'auto'
                     ? 'text-primary-500'

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

@@ -309,7 +309,7 @@
                             </span>
                         {:then result}
                             {@const FileIcon = ae_util.file_extension_icon_lucide(event_file_obj.extension)}
-                            <svelte:component this={FileIcon} size="1em" class="inline mx-0.5" />
+                            <FileIcon size="1em" class="inline mx-0.5" />
                             {event_file_obj.extension}
                             {#if result === null || result === false}
                                 <span class="text-error-500"