feat(nav): deep-align menu_search panel, pill radius, senior media

- Layout-2 remote-box AJAX panel (history/hot/posts) via aksrt_menu_search
- Live suggestions for post/topic/product; local history for guests
- Publish radius switch (zibll bool pill) mapped to CSS radius class
- Senior menu editor: WP media library image picker
- Active menu underline + panel CSS; acceptance/contract updates

src/AKSRT/Settings/FacadeBulk.php

@@ -69,13 +69,24 @@ trait FacadeBulk {
             $types = array_values(array_filter(array_map('sanitize_key', $s['header_newposts_types'])));
         }
 
+        // zibll nav_newposts_radius is bool pill; map true→20px, false→0. Legacy int still accepted once.
+        $raw_radius = $s['header_newposts_radius'] ?? true;
+        if (is_bool($raw_radius) || $raw_radius === '0' || $raw_radius === '1' || $raw_radius === 0 || $raw_radius === 1) {
+            $radius_px = !empty($raw_radius) ? 20 : 0;
+            $radius_pill = !empty($raw_radius);
+        } else {
+            $radius_px = max(0, min(30, (int) $raw_radius));
+            $radius_pill = $radius_px >= 16;
+        }
+
         return [
             // Default on like zibll nav_newposts when key unset.
-            'enabled' => !isset($s['header_newposts_enabled']) || !empty($s['header_newposts_enabled']),
-            'text'    => trim((string) ($s['header_newposts_text'] ?? '<i class="fa fa-pencil"></i> 发布')),
-            'radius'  => max(0, min(30, (int) ($s['header_newposts_radius'] ?? 20))),
-            'class'   => sanitize_html_class((string) ($s['header_newposts_class'] ?? '')),
-            'types'   => $types,
+            'enabled'     => !isset($s['header_newposts_enabled']) || !empty($s['header_newposts_enabled']),
+            'text'        => trim((string) ($s['header_newposts_text'] ?? '<i class="fa fa-pencil"></i> 发布')),
+            'radius'      => $radius_px,
+            'radius_pill' => $radius_pill,
+            'class'       => sanitize_html_class((string) ($s['header_newposts_class'] ?? '')),
+            'types'       => $types,
         ];
     }