fix: bottom padding on views so last row clears keyboard hints pill

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/components/timeline/Timeline.tsx

@@ -694,7 +694,9 @@ export function Timeline() {
       <div
         ref={parentRef}
         className="h-full overflow-auto bg-bg"
-        style={{ padding: `${PADDING}px` }}
+        // Extra bottom padding so the last row clears the floating
+        // KeyboardHints pill (which sits at bottom-4, ~40px tall).
+        style={{ padding: `${PADDING}px`, paddingBottom: `${PADDING + 64}px` }}
       >
         <div
           style={{