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+# M006:
+
+## Vision
+Consolidate admin navigation into a dropdown, add head/tail log viewing and commit SHA tracking to the pipeline, clean up technique page tag styling and sidebar order, redesign the Topics browse page with a Music Theory category, and add app version footer.
+
+## Slice Overview
+| ID | Slice | Risk | Depends | Done | After this |
+|----|-------|------|---------|------|------------|
+| S01 | Admin Navigation Dropdown + Header Cleanup | low | — | ⬜ | Header shows Home, Topics, Creators, and an Admin dropdown. Clicking Admin reveals Review, Reports, Pipeline links. ModeToggle removed from header. |
+| S02 | Pipeline Page: Head/Tail Log View + Token Count | low | — | ⬜ | Pipeline event log shows Head/Tail toggle buttons. Head shows first N events, Tail shows last N events. Token counts visible per event and per video. |
+| S03 | Git Commit SHA in Pipeline Version Metadata | low | — | ⬜ | Running the pipeline captures the current git commit SHA. Viewing a technique page version shows the commit hash in the metadata panel. |
+| S04 | Technique Page: Sidebar Reorder, Creator Emphasis, Tag Polish | medium | — | ⬜ | Technique page sidebar shows Plugins Referenced at top. Creator name is visually prominent. Tags use a coherent color system. |
+| S05 | Topics Page Redesign + Music Theory Category | high | — | ⬜ | Topics page shows 7 categories (including Music Theory) with an improved visual layout — category cards with descriptions, sub-topic counts, better structure. |
+| S06 | App Footer with Version Info | low | — | ⬜ | Every page shows a subtle footer with app version, build date, and optional repo link. |
diff --git a/.gsd/milestones/M006/slices/S01/S01-PLAN.md b/.gsd/milestones/M006/slices/S01/S01-PLAN.md
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+# S01: Admin Navigation Dropdown + Header Cleanup
+
+**Goal:** Header nav shows Home, Topics, Creators as flat links and an Admin dropdown. Clicking Admin reveals Review, Reports, Pipeline links. ModeToggle removed from header (kept on ReviewQueue page).
+**Demo:** After this: Header shows Home, Topics, Creators, and an Admin dropdown. Clicking Admin reveals Review, Reports, Pipeline links. ModeToggle removed from header.
+
+## Tasks
+- [x] **T01: Created AdminDropdown component with click-outside/Escape close, wired into App.tsx header replacing 3 admin links + ModeToggle, added dropdown CSS using existing theme tokens** — Create an AdminDropdown React component, replace the 3 admin nav links and ModeToggle in App.tsx, and add dropdown CSS to App.css.
+
+**Context:** The header in `App.tsx` currently has 6 flat `` elements (Home, Topics, Creators, Review, Reports, Pipeline) plus a ``. Goal: group the 3 admin links behind an "Admin" dropdown, remove ModeToggle from the header. ModeToggle is still used by `ReviewQueue.tsx` — do NOT delete the component or its CSS.
+
+**Click-outside pattern** — adapt from `Home.tsx` (typeahead):
+```tsx
+const dropdownRef = useRef(null);
+useEffect(() => {
+ function handler(e: MouseEvent) {
+ if (dropdownRef.current && !dropdownRef.current.contains(e.target as Node)) {
+ setOpen(false);
+ }
+ }
+ document.addEventListener("mousedown", handler);
+ return () => document.removeEventListener("mousedown", handler);
+}, []);
+```
+
+**CSS variables available** (all defined in App.css `:root`):
+- Trigger text: `--color-text-on-header` / `--color-text-on-header-hover`
+- Dropdown background: `--color-bg-surface`
+- Border: `--color-border`
+- Shadow: `--color-shadow-heavy`
+- Item hover bg: `--color-bg-surface-hover`
+- Item text: `--color-text-primary`
+ - Estimate: 30m
+ - Files: frontend/src/components/AdminDropdown.tsx, frontend/src/App.tsx, frontend/src/App.css
+ - Verify: cd frontend && npx tsc --noEmit && npx vite build
diff --git a/.gsd/milestones/M006/slices/S01/S01-RESEARCH.md b/.gsd/milestones/M006/slices/S01/S01-RESEARCH.md
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+# S01 Research — Admin Navigation Dropdown + Header Cleanup
+
+## Summary
+
+Straightforward frontend slice. The header nav in `App.tsx` currently shows 6 flat links (Home, Topics, Creators, Review, Reports, Pipeline) plus a `ModeToggle` component. The goal: group the 3 admin links (Review, Reports, Pipeline) behind an "Admin" dropdown, and remove `ModeToggle` from the header (it stays on the ReviewQueue page).
+
+No new dependencies needed. No backend changes. No library lookups required — the codebase already has a click-outside dropdown pattern in `Home.tsx` (typeahead) that can be adapted.
+
+## Recommendation
+
+Single task. All changes are in 2 files (`App.tsx`, `App.css`) plus optionally extracting the dropdown into a small component. The ModeToggle component file itself is NOT deleted — it's still imported by `ReviewQueue.tsx`.
+
+## Implementation Landscape
+
+### Current State
+
+**`frontend/src/App.tsx`** — The app shell. Header contains:
+- Brand link (`Chrysopedia`)
+- `