Remove the pre-session Auto rollout / Steering segmented control and make
manual continuation (steering) the sole mode: default it on in the session
store and keep it on across project/lobby resets. Leaves a short steering
hint in its place.
When a steering prompt is refused by the enhancer (e.g. content-policy) or enhancement
fails for all providers, the backend enqueues nothing and won't re-emit prompt_sources_
blocked, leaving the UI stuck on the generating overlay. On prompt/fallback_used and
session/error in steering, return to the 'describe the next scene' state, drop the failed
scene from the history (steeringFailed), and surface a retry notice; clear the notice on
the next submit.
Steering mode now shows an elegant list of each scene's prompt above the player. The
text comes from the user's own words, captured stably at submit time as rawText (the
backend later overwrites text/source with the enhanced prompt, so those are never read);
a preset's opening scene with no user prompt falls back to promptHistory. The redundant
ChatBar 'Segment complete' banner is dropped (the video overlay already says it, and it
was squeezing the list), and a ResizeObserver re-pins the list to the latest scene when
the area resizes.
Add a user-facing Auto rollout / Steering segmented control to the main composer (not just
devtools), wired to manualContinuationMode and authoritative at session start. In steering
mode a preset seeds only its first segment and auto/loop are forced off, so the backend waits
for the user to describe each subsequent scene by hand.
The FastVideo logo now navigates to the app home (most intuitive), and the
Join-Waitlist buttons (header desktop/mobile + session-ended card) become a Blog
link pointing at the Dreamverse blog.
handleDownloadVideo already remuxes live (including in-progress) segments, but the button
was gated on a finalized clip blob. Surface it as soon as playback starts (avPlaybackStarted)
so the user can grab the in-progress video at any point — important for unbounded steering
sessions.
When a segment finishes in steering mode the player no longer spins. Instead it shows a
soft 'Segment complete' prompt over the frozen last frame (gated on the playhead actually
reaching the buffered end, and hidden again when the user scrubs back). After the user
submits the next scene, a ~4.5s progress bar covers the generation latency so the wait has
a visible ETA.
Add a 'Steering mode' checkbox to the devtools composer and thread the
manualContinuationEnabled / onManualContinuationToggle props through DevtoolsShell.
Steering (manual continuation) lets the user drive the rollout segment-by-segment
indefinitely. Treat it like single-clip mode for the generation cap:
_resolve_generation_segment_cap returns 0 (unlimited) and the cap-reached guard is
skipped when manual_continuation_mode is on.
The DiT forward swallowed video_position_offset_sec via **kwargs, so multi-segment
rollouts never advanced the temporal RoPE phase between segments, causing ~1s audio/
video desync at each seam. Add the offset to the temporal position coords (mirrors
hao-ai-lab/FastVideo#1422).
alexzms