feat(badges): add 4×6 fanfold layout CSS for Epson single-sided stock

Introduces badge_layout_epson_4x6_fanfold.css (layout code badge_4x6_fanfold)
for the Axonius Adapt 2026 June show. Wires @page size to 4in×6in in the print
page and cleans up the stale 4in×12in default. Imports new CSS in badge component.
Measured stock: 4in × 6in portrait with 5/8in lanyard hole 1/4in from top.

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

documentation/MODULE__AE_Events_Badge_Templates.md

@@ -180,7 +180,7 @@ The `layout` field encodes physical badge stock dimensions. Standard codes to us
 | --- | --- | --- | --- |
 | `badge_4x5_fanfold` | 4" × 5" (101.6 × 127mm) | `badge_layout_epson_4x5_fanfold.css` | Epson ColorWorks C3500 / ExpoBadge fanfold — preferred for general conference use (ISHLT, demos) |
 | `badge_3.5x5.5_pvc` | 3.5" × 5.5" (88.9 × 139.7mm) | `badge_layout_zebra_zc10l_pvc.css` | PVC card, Zebra ZC10L — single-sided, set `duplex=0` |
-| `badge_4x6_fanfold` | 4" × 6" (101.6 × 152.4mm) | *(none — Tailwind defaults)* | Generic fanfold fallback; dimensions match the hardcoded Tailwind values |
+| `badge_4x6_fanfold` | 4" × 6" (101.6 × 152.4mm) | `badge_layout_epson_4x6_fanfold.css` | Single-sided fanfold; Axonius Adapt 2026 (June 2026). Lanyard hole: 5/8in × 1/8in, centered, 1/4in from top. |
 | `badge_4x6_fanfold_tickets` | 4" × 6" + tear-offs | *(pending)* | Fanfold with ticket stubs |
 
 Layout CSS files live in `src/lib/ae_events/badges/css/` and are imported by
@@ -359,6 +359,7 @@ Firefox users can use "Save to PDF" directly — it just works.
 - [x] Wire `style_href` via `<svelte:head>` in print page — done in `print/+page.svelte`; also in `properties_to_save`. (2026-03-18 verified)
 - [x] Add `duplex` to `properties_to_save` — done. (2026-03-18 verified)
 - [x] Add `duplex`-driven suppression to `badge_back` section — done in `ae_comp__badge_obj_view.svelte`; `show_badge_back` derived from `duplex` field.
-- [ ] Make `layout` field drive actual card dimensions in the badge component — currently the Zebra ZC10L layout CSS (`badge_layout_zebra_zc10l_pvc.css`) sets dimensions correctly via `[data-layout="..."]` scoping, but fanfold layouts still use Tailwind defaults. Needs proper CSS for each layout code.
+- [x] `badge_4x6_fanfold` layout CSS created (`badge_layout_epson_4x6_fanfold.css`), imported in badge component, `@page 4in 6in` wired in print page. (2026-05-15)
+- [ ] `badge_4x5_fanfold` layout CSS exists but is stale (not used in 2+ years) — review against actual hardware before next use.
 - [ ] Remove dead `exhibitor_info` / `presenter_info` / `staff_info` / `vip_info` / `vote_info` `{#if}` blocks from `ae_comp__badge_obj_view.svelte` (if they were carried over from v1)
 - [ ] Improve `ae_comp__badge_template_form.svelte` to edit all relevant fields (currently minimal)

src/lib/ae_events/badges/css/badge_layout_epson_4x6_fanfold.css

@@ -0,0 +1,63 @@
+/* =============================================================================
+   Badge Layout: Epson ColorWorks — Fanfold 4" × 6" (Single-sided)
+   layout code:  badge_4x6_fanfold
+   Badge stock:  4in wide × 6in per label, single-sided continuous fanfold
+   Used for:     Axonius Adapt 2026 (June 2026)
+
+   Physical notes (measured 2026-05-15):
+     Overall:     4.0in × 6.0in (portrait)
+     Lanyard hole: 5/8in wide × 1/8in tall, centered horizontally,
+                   1/4in from top edge, 3/8in from each side edge.
+     Keep decorative header content below the hole zone (~3/8in from top).
+
+   Print behavior:
+     Single-sided only. Set duplex=0 on the template — the badge_back section
+     will not render at all. @page size (4in × 6in) is injected dynamically
+     by print/+page.svelte <svelte:head> based on the layout field.
+
+   CSS scope:
+     All rules scoped under [data-layout="badge_4x6_fanfold"] to avoid conflicts
+     with other layouts compiled into the same bundle. These override the
+     Tailwind utility classes (w-[4in], min-h-[6.0in], etc.) hardcoded on the
+     badge sections — attribute + class selectors win over single class selectors.
+   ============================================================================= */
+
+/* --- Badge front --- */
+
+[data-layout='badge_4x6_fanfold'] .badge_front {
+    min-width: 4in;
+    width: 4in;
+    min-height: 6in;
+    max-height: 6in;
+
+    /* debug */
+    /* outline: thick solid orange; */
+}
+
+/* Body area: 6in total − ~1in header − ~0.5in footer ≈ 4.5in for content */
+[data-layout='badge_4x6_fanfold'] .badge_body {
+    max-height: 4.5in;
+}
+
+/* Outer wrapper: strip the default padding/gap so the outline hugs the badge.
+   badge_front above supplies the exact 4×6in card size. */
+[data-layout='badge_4x6_fanfold'].event_badge_wrapper {
+    padding: 0;
+    gap: 0;
+    min-height: 0;
+    min-width: 4in;
+    width: 4in;
+    max-width: 4in;
+}
+
+@media print {
+    [data-layout='badge_4x6_fanfold'].event_badge_wrapper {
+        width: 4in !important;
+        height: 6in !important;
+        max-width: 4in !important;
+        max-height: 6in !important;
+        /* overflow: visible so any intentional bleed element is not clipped by the
+           wrapper — the Epson driver clips at the physical label edge. */
+        overflow: visible !important;
+    }
+}

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

@@ -72,6 +72,7 @@ let {
 // Each file scopes rules under [data-layout="..."] on the wrapper section.
 // @page rules (paper size) are injected per-template in print/+page.svelte.
 import '$lib/ae_events/badges/css/badge_layout_epson_4x5_fanfold.css';
+import '$lib/ae_events/badges/css/badge_layout_epson_4x6_fanfold.css';
 import '$lib/ae_events/badges/css/badge_layout_zebra_zc10l_pvc.css';
 
 import { untrack } from 'svelte';

src/routes/events/[event_id]/(badges)/badges/[badge_id]/print/+page.svelte

@@ -293,8 +293,10 @@ let page_size_css = $derived(
     $lq__event_badge_template_obj?.layout === 'badge_3.5x5.5_pvc'
         ? '3.5in 5.5in'
         : $lq__event_badge_template_obj?.layout === 'badge_4x5_fanfold'
-          ? '4in 10in'
-          : '4in 12in' // Default: badge_4x6_fanfold or layout not yet set
+          ? '4in 10in' // duplex fanfold: 5in front + 5in back = 10in strip
+          : $lq__event_badge_template_obj?.layout === 'badge_4x6_fanfold'
+            ? '4in 6in' // single-sided fanfold: front only
+            : '4in 6in' // fallback: unknown layout, assume single-sided 4×6
 );
 // @page size + optional per-template margin override from cfg_json.print_margin.
 // print_margin_cfg is parsed from the template's cfg_json field — allows per-event