Sync all jumbotron cells from frame zero

Rebuilds the jumbotron from raw phase data so every cell starts at source frame 0 together. Camera pose now reveals only the trajectory up to the current frame rather than showing future motion at the start.

assets/rpx-jumbotron.mp4

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:e3ed16d0c0b73aa7d89781f9139241c0002779c137e4aabd425ed4281c8e56fe
-size 2870205
+oid sha256:ba6e54ecda79b474d204e8a2b0029ab3afb46d9a688a273307b6bcc6c64b1e40
+size 5977999