nexus/.planning/phases/44-video-presentations/44-03-SUMMARY.md

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---
phase: 44-video-presentations
plan: 03
subsystem: ui
tags: [remotion, video, presentations, react, sse, progress, content-studio]
# Dependency graph
requires:
- phase: 44-video-presentations/44-01
provides: PresentationBundle interface, content_job.progress LiveEventType, presentation case in content-job-runner
- phase: 44-video-presentations/44-02
provides: Server-side presentation renderer emitting SSE progress events
provides:
- useContentJob extended to read fine-grained data.progress from SSE events
- PresentationPanel component with prompt, type selector, real-time progress, MP4 player
- ContentStudio Presentations tab wiring PresentationPanel
affects:
- Any future content studio panels using useContentJob (can use fine-grained progress)
# Tech tracking
tech-stack:
added: []
patterns:
- "Fine-grained SSE progress: data.progress preferred over coarse statusToProgress fallback"
- "mp4Base64 -> blob URL via useMemo with URL.revokeObjectURL cleanup in useEffect"
- "Panel pattern: useContentJob + getContentJobAsset fetch on job.status === done"
key-files:
created:
- ui/src/components/PresentationPanel.tsx
modified:
- ui/src/hooks/useContentJob.ts
- ui/src/pages/ContentStudio.tsx
key-decisions:
- "data.progress preferred over statusToProgress when typeof data.progress === 'number' — backward-compatible for all non-video job types"
- "mp4Base64 blob URL created in useMemo and cleaned up via useEffect return — avoids memory leaks across rerenders"
- "PresentationBundle interface defined locally in PresentationPanel — avoids cross-package import from server types"
patterns-established:
- "Fine-grained SSE progress reading: check typeof data.progress === 'number' before falling back to coarse status mapping"
- "Video blob URL lifecycle: useMemo for creation, useEffect cleanup for revocation"
requirements-completed: [PRES-01, PRES-02, PRES-03, PRES-04]
# Metrics
duration: 5min
completed: 2026-04-04
---
# Phase 44 Plan 03: Video Presentations — UI Panel Summary
**PresentationPanel with real-time SSE progress bar, MP4 video player + download, and Presentations tab in ContentStudio — backed by fine-grained data.progress in useContentJob**
## Performance
- **Duration:** ~5 min
- **Started:** 2026-04-04T23:28:00Z
- **Completed:** 2026-04-04T23:33:00Z
- **Tasks:** 2
- **Files modified:** 3
## Accomplishments
- Extended `useContentJob` SSE handler to read `data.progress` (number 0-100) from status events, falling back to coarse `statusToProgress` for non-video job types
- Created `PresentationPanel` (199 lines) with prompt textarea, pitch-deck/demo-video selector, real-time progress bar with percentage text, MP4 video player with blob URL lifecycle management, and download + generate-another actions
- Added Presentations tab to ContentStudio as the 8th tab, wired to PresentationPanel
## Task Commits
1. **Task 1: Extend useContentJob to read fine-grained SSE progress** - `f088090a` (feat)
2. **Task 2: Create PresentationPanel and add Presentations tab to ContentStudio** - `1fb26bfb` (feat)
## Files Created/Modified
- `ui/src/hooks/useContentJob.ts` - Added `progress?: number` to SSE data type; prefer `data.progress` over coarse `statusToProgress`
- `ui/src/components/PresentationPanel.tsx` - Full panel: prompt, type selector, progress bar, video player, blob URL lifecycle
- `ui/src/pages/ContentStudio.tsx` - Import PresentationPanel; add Presentations TabsTrigger and TabsContent after Brand
## Decisions Made
- `data.progress` check uses `typeof data.progress === "number"` guard — prevents `0` (falsy) from triggering the fallback incorrectly
- `mp4Base64` blob URL created in `useMemo([bundle?.mp4Base64])` and revoked in `useEffect` return — ensures revocation fires when URL changes or component unmounts
- `PresentationBundle` interface defined locally in `PresentationPanel.tsx` — avoids importing server-side types into the UI package
## Deviations from Plan
None - plan executed exactly as written.
## Issues Encountered
Pre-existing TypeScript errors in `ContentStudio.tsx` (themeJob.bundle reference) and `PersonalAssistant.tsx` (ToastTone type mismatch) exist independently of this plan's changes. No new errors were introduced by this plan. Logged as deferred items (out-of-scope per deviation rule boundary).
## User Setup Required
None - no external service configuration required.
## Next Phase Readiness
- All four PRES requirements (PRES-01 through PRES-04) are complete across plans 01-03
- Phase 44 is complete: Remotion workspace (plan 01), server renderer (plan 02), UI panel (plan 03)
- ContentStudio now has 8 tabs: Diagrams, Icons, Themes, Wallpapers, Social, Documents, Brand, Presentations
## Self-Check: PASSED
- FOUND: ui/src/components/PresentationPanel.tsx
- FOUND: ui/src/hooks/useContentJob.ts (modified)
- FOUND: ui/src/pages/ContentStudio.tsx (modified)
- FOUND: .planning/phases/44-video-presentations/44-03-SUMMARY.md
- FOUND commit: f088090a (Task 1)
- FOUND commit: 1fb26bfb (Task 2)
- FOUND commit: 60e94e51 (metadata)
---
*Phase: 44-video-presentations*
*Completed: 2026-04-04*