fixed search below content + light editor and search

frontend/src/styles/global.css

@@ -142,13 +142,15 @@ body {
   position: relative;
 }
 
-/* Paper grain — applied as a fixed overlay so every page gets the texture. */
+/* Paper grain — applied as a fixed overlay so every page gets the texture.
+ * All three layers sit behind content (negative z-index) so fixed-positioned
+ * modals (e.g. the search palette) can escape ancestor stacking traps. */
 body::before {
   content: "";
   position: fixed;
   inset: 0;
   pointer-events: none;
-  z-index: -2;
+  z-index: -3;
   background-color: var(--base);
 }
 body::after {
@@ -156,8 +158,8 @@ body::after {
   position: fixed;
   inset: 0;
   pointer-events: none;
-  z-index: 0;
-  opacity: 0.35;
+  z-index: -1;
+  opacity: 0.32;
   mix-blend-mode: multiply;
   background-image:
     url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.10 0 0 0 0 0.07 0 0 0 0 0.04 0 0 0 0.22 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
@@ -171,7 +173,7 @@ html.salon-noir body::after {
 .salon-atmosphere {
   position: fixed;
   inset: 0;
-  z-index: -1;
+  z-index: -2;
   pointer-events: none;
   overflow: hidden;
 }