Fix frame loading and improve card layout

- Copy splice_frames to docs/ directory so frames are accessible via GitHub Pages
- Change evidence-grid layout from multi-column to single column (1fr)
- Each card now displays in its own row for better visibility and readability
- Frames will now load properly in the interactive slider

This addresses the layout issues where cards were too narrow in a 4-column layout
and fixes the broken frame loading by making frames accessible to GitHub Pages.

Author: codegen-sh[bot]

docs/index.html

@@ -96,7 +96,7 @@
 
         .evidence-grid {
             display: grid;
-            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
+            grid-template-columns: 1fr;
             gap: 30px;
             margin: 40px 0;
         }