---
id: T02
parent: S03
milestone: M011
provides: []
requires: []
affects: []
key_files: ["frontend/src/App.tsx", "frontend/src/App.css"]
key_decisions: ["Hamburger icon toggles to X via conditional SVG rendering", "Mobile nav search duplicated inside menu panel rather than CSS-repositioned", "AdminDropdown restyled to full-width static submenu in mobile panel"]
patterns_established: []
drill_down_paths: []
observability_surfaces: []
duration: ""
verification_result: "Build succeeds (51 modules, 858ms). Browser tested at 390×844: hamburger visible, menu opens/closes correctly, all three auto-close mechanisms work, desktop hides hamburger, home page omits search correctly."
completed_at: 2026-03-31T08:45:23.843Z
blocker_discovered: false
---

# T02: Added mobile hamburger menu with 44px touch targets, Escape/outside-click/route-change auto-close

> Added mobile hamburger menu with 44px touch targets, Escape/outside-click/route-change auto-close

## What Happened
---
id: T02
parent: S03
milestone: M011
key_files:
  - frontend/src/App.tsx
  - frontend/src/App.css
key_decisions:
  - Hamburger icon toggles to X via conditional SVG rendering
  - Mobile nav search duplicated inside menu panel rather than CSS-repositioned
  - AdminDropdown restyled to full-width static submenu in mobile panel
duration: ""
verification_result: passed
completed_at: 2026-03-31T08:45:23.843Z
blocker_discovered: false
---

# T02: Added mobile hamburger menu with 44px touch targets, Escape/outside-click/route-change auto-close

**Added mobile hamburger menu with 44px touch targets, Escape/outside-click/route-change auto-close**

## What Happened

Added menuOpen state with three auto-close mechanisms (route change, Escape key, outside click) to App.tsx. Hamburger button uses conditional SVG (three-line ↔ X). At <768px breakpoint, nav collapses to absolute-positioned column panel with max-height transition. All nav links get min-height: 44px touch targets. Mobile menu includes duplicated SearchAutocomplete and full-width AdminDropdown. Desktop layout unchanged.

## Verification

Build succeeds (51 modules, 858ms). Browser tested at 390×844: hamburger visible, menu opens/closes correctly, all three auto-close mechanisms work, desktop hides hamburger, home page omits search correctly.

## Verification Evidence

| # | Command | Exit Code | Verdict | Duration |
|---|---------|-----------|---------|----------|
| 1 | `cd frontend && npm run build 2>&1 | tail -15` | 0 | ✅ pass | 3000ms |
| 2 | `Browser: hamburger visible at 390x844, menu toggles, auto-close on route/Escape/outside-click` | 0 | ✅ pass | 0ms |


## Deviations

Search bar rendered as second SearchAutocomplete instance inside mobile menu rather than CSS-repositioned from header. GlobalShortcut omitted on mobile duplicate to avoid double Cmd+K registration.

## Known Issues

None.

## Files Created/Modified

- `frontend/src/App.tsx`
- `frontend/src/App.css`


## Deviations
Search bar rendered as second SearchAutocomplete instance inside mobile menu rather than CSS-repositioned from header. GlobalShortcut omitted on mobile duplicate to avoid double Cmd+K registration.

## Known Issues
None.
