design(sceau): hexagramme 益 traits épais, coins nets, aspect carré

- viewBox 112×105, height 8, rx supprimé (rendu cut)
- géométrie calée sur les modèles IMAGES/PERVIER/Hexagrammes

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/layouts/default.vue

@@ -4,23 +4,23 @@
     <main class="app-main">
       <slot />
 
-      <!-- 益 Yì (Increase, #42) — sceau hexagramme -->
+      <!-- 益 Yì (Increase, #42) — sceau hexagramme (traits épais, coins nets, ~carré) -->
-      <svg class="app-seal" viewBox="0 0 130 100" fill="currentColor" aria-hidden="true">
+      <svg class="app-seal" viewBox="0 0 112 105" fill="currentColor" aria-hidden="true">
         <!-- Line 6 (top) — yang -->
-        <rect x="5" y="5" width="120" height="5" rx="1"/>
+        <rect x="6" y="6" width="100" height="8"/>
         <!-- Line 5 — yang -->
-        <rect x="5" y="22" width="120" height="5" rx="1"/>
+        <rect x="6" y="23" width="100" height="8"/>
         <!-- Line 4 — yin -->
-        <rect x="5" y="39" width="49" height="5" rx="1"/>
+        <rect x="6" y="40" width="42" height="8"/>
-        <rect x="76" y="39" width="49" height="5" rx="1"/>
+        <rect x="64" y="40" width="42" height="8"/>
         <!-- Line 3 — yin -->
-        <rect x="5" y="56" width="49" height="5" rx="1"/>
+        <rect x="6" y="57" width="42" height="8"/>
-        <rect x="76" y="56" width="49" height="5" rx="1"/>
+        <rect x="64" y="57" width="42" height="8"/>
         <!-- Line 2 — yin -->
-        <rect x="5" y="73" width="49" height="5" rx="1"/>
+        <rect x="6" y="74" width="42" height="8"/>
-        <rect x="76" y="73" width="49" height="5" rx="1"/>
+        <rect x="64" y="74" width="42" height="8"/>
         <!-- Line 1 (bottom) — yang -->
-        <rect x="5" y="90" width="120" height="5" rx="1"/>
+        <rect x="6" y="91" width="100" height="8"/>
       </svg>
     </main>
     <LayoutTheFooter />