---
id: S02
parent: M016
milestone: M016
provides:
  - Pipeline admin page with working collapse toggle, mobile-friendly cards, stage chevrons, right-aligned filters, and populated creator dropdown
requires:
  []
affects:
  []
key_files:
  - frontend/src/App.css
  - frontend/src/pages/AdminPipeline.tsx
key_decisions:
  - Used text-based arrow styling rather than CSS rotate since JSX already swaps characters
  - Added pipeline-specific mobile media query block at end of App.css rather than mixing into existing blocks
patterns_established:
  - (none)
observability_surfaces:
  - none
drill_down_paths:
  - .gsd/milestones/M016/slices/S02/tasks/T01-SUMMARY.md
duration: ""
verification_result: passed
completed_at: 2026-04-03T05:39:15.514Z
blocker_discovered: false
---

# S02: Pipeline Admin UI Fixes

**Fixed five CSS/UI issues on the pipeline admin page: collapse arrow styling, mobile card layout, stage chevrons, filter right-alignment, and creator dropdown visibility.**

## What Happened

Applied five independent CSS/markup fixes to the pipeline admin page in a single task:

1. **Collapse arrow styling** — Added `.recent-activity__arrow` CSS rule with hover color transition. The JSX already swaps ▸/▾ characters on toggle, so the CSS adds visual polish (color change on hover) rather than rotate transform.

2. **Mobile card layout** — Added a pipeline-specific `@media (max-width: 768px)` block that switches `.pipeline-video__header` from a 4-column grid to single-column stack, adds text-overflow ellipsis, and wraps `.run-card__header` flex items. Filter bar also stacks vertically on mobile.

3. **Stage chevrons** — Replaced the 8px×1px line pseudo-element on `.stage-timeline__step + .stage-timeline__step::before` with a `›` character chevron. Done stages get green chevron color.

4. **Filter bar right-alignment** — Added `margin-left: auto` to `.creator-filter`, pushing it and the search input to the right side of the flex container. Resets to `margin-left: 0` on mobile where the filters stack.

5. **Creator dropdown visibility** — Changed `creators.length > 1` to `creators.length >= 1` so the dropdown shows even with a single creator, letting the user see which creator's videos are displayed.

## Verification

Frontend build (`tsc -b && vite build`) passes with exit code 0. All five CSS rules confirmed present in App.css via grep. Creator dropdown condition confirmed as `>= 1` in AdminPipeline.tsx. Mobile media query block confirmed with pipeline-specific selectors.

## Requirements Advanced

- R038 — All five pipeline admin UI issues addressed: collapse toggle, mobile cards, chevrons, filter alignment, creator dropdown

## Requirements Validated

None.

## New Requirements Surfaced

None.

## Requirements Invalidated or Re-scoped

None.

## Deviations

Used text-based arrow styling with hover color transition instead of CSS rotate for collapse toggle, since JSX already handles character swapping (▸/▾).

## Known Limitations

None.

## Follow-ups

None.

## Files Created/Modified

- `frontend/src/App.css` — Added .recent-activity__arrow rule, stage chevron pseudo-element, .creator-filter margin-left:auto, pipeline-specific mobile media query block
- `frontend/src/pages/AdminPipeline.tsx` — Changed creators.length > 1 to >= 1 for single-creator dropdown visibility
