v2.2.1: anti-slop flattening pass

- Remove scanline/vignette overlays, colored glows, gradient washes
- Replace stat card grids with single segmented strips (hairline dividers)
- Reverse-video active filters, button hovers, and match-chip hover
- Sharp corners, flat focus outlines, titled-border findings.log shell
- Regenerate store + preview screenshots from flattened UI

results.html

@@ -70,11 +70,9 @@
   </div>
 
   <main class="main">
-    <div class="table-shell">
-      <div class="shell-head">
-        <span class="shell-title">findings.log</span>
-        <span class="shell-meta" id="shellMeta"></span>
-      </div>
+    <div class="table-shell titled">
+      <span class="titled-label">findings.log</span>
+      <span class="titled-meta" id="shellMeta"></span>
       <table class="findings-table">
         <thead>
           <tr>