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/smoke-test.cjs

@@ -59,11 +59,10 @@ function createEnv({ valid = true, fetchOk = true, clipboardFails = false } = {}
   const timers = [];
   const output = { textContent: "", classList: createClassList() };
   const heroAnimation = {
-    src: "./squaremcp_launch.gif",
-    dataset: {
-      posterSrc: "./squaremcp_launch_poster.png",
-      playMs: "9600",
-    },
+    src: "./squaremcp-hero-loop.mp4",
+    autoplay: true,
+    loop: true,
+    muted: true,
   };
   const entries = [
     ["name", "Casey"],
@@ -157,10 +156,11 @@ function assert(condition, message) {
 
 async function run() {
   const validEnv = createEnv();
-  assert(validEnv.timers.length === 1, "hero animation timer missing");
-  assert(validEnv.timers[0].ms === 9600, "hero animation timer mismatch");
-  validEnv.timers[0].fn();
-  assert(validEnv.heroAnimation.src === "./squaremcp_launch_poster.png", "hero poster swap failed");
+  // Hero is now a looping video — no timer-based poster swap
+  assert(validEnv.timers.length === 0, "hero video should not set a poster swap timer");
+  assert(validEnv.heroAnimation.src === "./squaremcp-hero-loop.mp4", "hero video src mismatch");
+  assert(validEnv.heroAnimation.autoplay === true, "hero video should autoplay");
+  assert(validEnv.heroAnimation.loop === true, "hero video should loop");
 
   let prevented = false;
   await validEnv.form.dispatch("submit", {