docs/Website: Niveus at upstream f340d56; fonts are binary

The vendored copy of Niveus, the site's design system, brought up to
the current upstream (github.com/Nexoniarz/Niveus, 2026-10-18). The
tree under docs/Website/niveus is upstream's byte for byte.

.gitattributes says `* text eol=lf` and listed the binary types it
knew, and woff2 was not one of them: Niveus's InstrumentSans-Italic
had a CR LF pair in its compressed data, and committing it turned that
into LF and the font into garbage. woff, woff2, otf, ico, gif, webp,
pdf and wasm are binary now.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01S1giNvrHTrPMPw7V6x1kQ4

docs/Website/niveus/examples/ai-chat/index.html

@@ -404,7 +404,7 @@
             .forEach((el) => el.removeAttribute("aria-current"));
           item.setAttribute("aria-current", "page");
           render(item.dataset.thread);
-        });
+        }, { scope: list });
         scroller.scrollTop = 0;
       });
     });