fix: DrillOrbit fades in/out at path edges, DrillBitSpinner uses radial mask instead of hard clip

Former-commit-id: 3aea27f3e17984634206ca817d074b18e712933e

components/blocks/HeroVideo.tsx

@@ -4,6 +4,7 @@ import { Button } from '@/components/ui/Button';
 import Image from 'next/image';
 import { motion, AnimatePresence } from 'framer-motion';
 import { useState, useEffect } from 'react';
+import { DrillTeeth } from '@/components/ui/decorations/DrillTeeth';
 
 interface HeroVideoProps {
   data?: any;
@@ -108,6 +109,8 @@ export function HeroVideo(props: HeroVideoProps) {
           </div>
         </motion.div>
       </div>
+      {/* Organic wave divider — displaced earth strata */}
+      <DrillTeeth position="bottom" fill="var(--color-neutral-dark)" className="z-[5]" />
     </div>
   );
 }