feat(badges): TC modal centering, positioning, and allow-tracking toggle

- Center modal horizontally; position 10vh from top instead of centered vertically
- Add Allow/Do-not-allow toggle buttons inside the TC modal so attendees
  can set their lead scanning preference while reading the terms
- Buttons reflect current DB value on open and use solid color fills
  (green/red) so selection state is unambiguous in light and dark mode
- Save & Close calls existing save_field('allow_tracking') then closes;
  Cancel closes without saving

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

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

@@ -775,17 +775,19 @@ let allow_tracking_open = $derived(
                 {/if}
             </button>
 
+            {#if $ae_loc.edit_mode && $ae_loc.trusted_access}
             <!-- Quick print: 30% — window.print() only, no count, no navigation.
                  Use when you need to reprint mid-workflow without resetting search state
                  or when the count should not change (e.g. a test print). -->
             <button
                 type="button"
-                class="btn preset-tonal-surface border-primary-200/50 dark:border-primary-800/30 flex flex-3 items-center justify-center gap-1 border text-xs"
+                class="btn preset-tonal-warning border-warning-200/50 dark:border-warning-800/30 flex flex-3 items-center justify-center gap-1 border text-xs"
                 onclick={() => window.print()}
                 title="Print without tracking — no count increment, stays on this page">
                 <Printer size="12" />
-                Print
+                Test
             </button>
+            {/if}
         </div>
         {#if is_printed && print_status === 'idle'}
             <p
@@ -1664,7 +1666,7 @@ let allow_tracking_open = $derived(
      ============================================================ -->
 <dialog
     bind:this={tc_dialog_ref}
-    class="w-full max-w-md rounded-xl border border-gray-200 bg-white p-0 shadow-2xl dark:border-gray-700 dark:bg-gray-900"
+    class="mx-auto mt-[10vh] w-full max-w-md rounded-xl border border-gray-200 bg-white p-0 shadow-2xl dark:border-gray-700 dark:bg-gray-900"
     onclick={(e) => {
         if (e.target === tc_dialog_ref) tc_dialog_ref?.close();
     }}>
@@ -1714,11 +1716,49 @@ let allow_tracking_open = $derived(
                 registration desk.
             </p>
         </div>
-        <div class="mt-4 flex justify-end">
+        <!-- Allow tracking toggle — the attendee makes their choice here -->
+        <div class="mt-4 border-t border-gray-100 pt-4 dark:border-gray-800">
+            <p class="mb-2 text-sm font-semibold">Your preference:</p>
+            <div class="flex flex-col gap-2 sm:flex-row">
+                <button
+                    type="button"
+                    class="btn btn-sm flex-1 border-2 font-semibold transition-colors"
+                    class:bg-green-600={edit_allow_tracking}
+                    class:text-white={edit_allow_tracking}
+                    class:border-green-600={edit_allow_tracking}
+                    class:bg-white={!edit_allow_tracking}
+                    class:text-gray-500={!edit_allow_tracking}
+                    class:border-gray-300={!edit_allow_tracking}
+                    onclick={() => { edit_allow_tracking = true; }}>
+                    ✓ Allow lead scanning
+                </button>
+                <button
+                    type="button"
+                    class="btn btn-sm flex-1 border-2 font-semibold transition-colors"
+                    class:bg-red-600={!edit_allow_tracking}
+                    class:text-white={!edit_allow_tracking}
+                    class:border-red-600={!edit_allow_tracking}
+                    class:bg-white={edit_allow_tracking}
+                    class:text-gray-500={edit_allow_tracking}
+                    class:border-gray-300={edit_allow_tracking}
+                    onclick={() => { edit_allow_tracking = false; }}>
+                    ✕ Do not allow
+                </button>
+            </div>
+        </div>
+
+        <div class="mt-4 flex justify-end gap-2">
+            <button
+                type="button"
+                class="btn btn-sm preset-tonal-surface"
+                onclick={() => tc_dialog_ref?.close()}>Cancel</button>
             <button
                 type="button"
                 class="btn btn-sm preset-filled-primary"
-                onclick={() => tc_dialog_ref?.close()}>Got it</button>
+                onclick={() => {
+                    save_field('allow_tracking', { allow_tracking: edit_allow_tracking });
+                    tc_dialog_ref?.close();
+                }}>Save & Close</button>
         </div>
     </div>
 </dialog>