TODO.md L9 (owner permission 2026-08-27, roadmap A5): "The navbar on
mobile is way too squished. Make it a hamburger dropdown menu with a
nice animation." At <=640px the nav links leave the bar — a 44px
#nav-toggle opens #app-nav as an animated (180ms slide+fade)
edge-to-edge dropdown with comfortable rows and the auth visibility
contract intact inside the menu; at >640px the bar is byte-identical
to pre-phase-46 (hamburger absent, inline pills as before).
- frontend/*.html (all six pages): the shared bar gains the
#nav-toggle button (type=button, aria-expanded=false,
aria-controls="app-nav", aria-label="Menu", aria-hidden 3-line
SVG icon) immediately before the nav, and the nav gains
id="app-nav" — one <nav>, no duplicated links, so the whoami reveal
works inside the menu unchanged (phase-34 same-bar contract intact).
- frontend/assets/styles.css: .nav-toggle is display:none outside media
queries (desktop untouched); the <=640px block adds the 44px toggle
(+hover in the .steering-toggle:hover family, sized 20px icon), turns
.app-nav into the dropdown (absolute top:100% edge-to-edge under the
sticky header, surface + hairline + --shadow-lg, z-index 21 =
header+1, closed state invisible + non-interactive with the 180ms
opacity/transform/visibility-delayed pair, .is-open the only
opener), and comfortable 1rem/0.75rem menu rows — superseding the
phase-34/35 pill-squeeze rules for .nav-link/.app-nav (the 900px
tablet block, action pills, and 58px bar height untouched). The
reduced-motion block stills BOTH the closed and .is-open states: the
.is-open rule (0,2,0) out-specifies a bare .app-nav (0,1,0), so the
override must name both — verified live in Chromium (task 03).
- frontend/assets/header.js: ONE module-owned binding (import-time,
null-safe like the sign-out binding): click toggles .is-open +
aria-expanded in sync, a delegated nav-link click closes, Esc closes
and refocuses the toggle, and matchMedia("(max-width: 640px)")
change drops the state on resize back to desktop. The binding
touches only the container — ship-hidden whoami links stay hidden.
- tests/unit/test_hamburger_nav.py (new): the markup/CSS/JS contract
pins (six identical toggles in the shared row, desktop byte-
identical, dropdown + .is-open + 180ms + reduced-motion rules, the
superseded squeeze rules gone, the one-binding behavior).
- tests/e2e/test_shared_header.py: assert_shared_bar gains mobile=True
(at <=640px the bar shows the hamburger + the closed nav; the
per-role menu contents are pinned by the story suite).
- tests/e2e/test_mobile_hamburger_nav.py (new, story suite, 375x812):
toggle is a visible >=44px target, menu closed (opacity 0 /
visibility hidden), no horizontal overflow; anonymous menu shows
exactly "Chat" (admin-only links stay hidden inside); admin menu
shows all four links (whoami reveal inside the menu); a link click
navigates + the arrival page ships closed; Esc closes and refocuses
the toggle (outside click does NOT close — accepted: the locked
close set is Esc + link + resize, no backdrop); the 180ms
opacity/transform pair is live and reducedMotion:reduce stills both
states with open/close still working; 1280x800 regression — toggle
display:none, all four inline links inside the header band.
Gates: unit+integration 773 passed; app/ coverage TOTAL 99%
(unchanged — frontend-only phase); story E2E 7 passed in isolation
(mock LLM, DB up); regression suites test_nav_consistency (6) /
test_header_consistency (3) / test_shared_header (6) /
test_responsive_polish (7) / test_tuning_nav_link (4) all pass in
isolation; ruff check + pyright clean. A11 honored: no CDN, no new
assets.
Also records the 46_mobile_hamburger_nav todo/ -> complete/ move.
ducoterra