fix(badges): fix 4x6 fanfold header image display and body gap

Two layout fixes for the badge_4x6_fanfold layout (no background_image_path):

1. badge_header max-height: 1.5in — the Axonius logo (624×232px) renders at
   ~1.49in tall at full badge width. The inherited max-h-[1.00in] was cropping
   the bottom half of the image.

2. badge_body margin-top: 0 — overrides the component-level mt-54 (≈2.25in).
   That margin was needed for the PVC layout where a full-bleed background image
   covered the badge and body text needed to start in the image's designated zone.
   For fanfold badges with a standalone header_path, mt-54 created a 2.25in blank
   gap between the header and the attendee name.

Also updates default fit_heights for badge_4x6_fanfold to match the 4.0in body
height (was sized for 4.5in before the header zone was properly accounted for).

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

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

@@ -383,16 +383,17 @@ let fit_heights = $derived.by(() => {
             location: '0.5in'
         };
     } else {
-        // Default: badge_4x6_fanfold — 4" × 6", most room
+        // Default: badge_4x6_fanfold — 4" × 6", single-sided with 1.5in header
+        // Body = 6in − 1.5in header − 0.5in footer = 4.0in
         base = {
-            grp_name_title: '2.5in',
+            grp_name_title: '2.2in',
             grp_name_title_flex: 'around',
-            name: '1.9in',
-            title: '0.7in',
-            grp_aff_loc: '1.9in',
+            name: '1.7in',
+            title: '0.65in',
+            grp_aff_loc: '1.8in',
             grp_aff_loc_flex: 'between',
-            affiliations: '1.3in',
-            location: '0.55in'
+            affiliations: '1.2in',
+            location: '0.5in'
         };
     }