feat: social video uploads + hero page video + TikTok content

Hero page:
- Replace GIF with squaremcp-hero-loop.mp4 (autoplay, muted, loop)
- Update styles, scripts, tests, Dockerfile, baselines
- Deployed and verified

Social video uploads:
- Twitter/X: uploadVideoAndTweet via v1.1 media/upload + v2 tweets
- Facebook: createVideoPost via Graph API /{pageId}/videos
- Instagram: createReel via Graph API (container → poll → publish)
- TikTok: REST endpoints + OpenAPI schema for video upload

Marketing:
- TikTok content prompts, scripts, and posting schedule

Note: Remotion not mentioned in any user-facing content

product/site/script.js

@@ -1,20 +1,8 @@
 const form = document.getElementById("pilotIntakeForm");
 const output = document.getElementById("pilotOutput");
 const copyButton = document.getElementById("copyRequestButton");
-const heroAnimation = document.getElementById("heroAnimation");
 const submitEndpoint = "/api/pilot-request";
 
-if (heroAnimation) {
-  const posterSrc = heroAnimation.dataset.posterSrc;
-  const playMs = Number(heroAnimation.dataset.playMs || "0");
-
-  if (posterSrc && playMs > 0) {
-    window.setTimeout(() => {
-      heroAnimation.src = posterSrc;
-    }, playMs);
-  }
-}
-
 function buildMessage(data) {
   return [
     "Pilot request for SquareMCP",