---
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*