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feat(header): hamburger dropdown nav on mobile (owner permission)

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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.
This commit is contained in:
ducoterra
2026-08-28 06:07:02 -04:00
parent b855d0aef9
commit 6be692d999
15 changed files with 1138 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files
frontend/assets/styles.css
+78 -2
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@@ -274,6 +274,14 @@ html::after {
.nav-link:hover { background: var(--brand-soft); color: var(--brand-ink); }
.nav-link.is-active { background: var(--brand); color: var(--bg); }
/* Phase 46 (owner permission 2026-08-27, TODO.md L9): the mobile
hamburger button — desktop is byte-identical to before (the control
is absent outside the ≤640px block, which re-displays it and turns
the nav into the dropdown). :focus-visible inherits the global 3px
outline rule; the 44px target + the rest of the look live in the
≤640px block below. */
.nav-toggle { display: none; }
/* "New chat" reset (phase 14): ghost pill in the chat header, hover like
a nav link. ink-soft on surface ≈6.9:1; hover pair brand-ink/brand-soft
≈6.9:1 — both WCAG AA. Icon-only below 640px (aria-label keeps the
@@ -2163,8 +2171,66 @@ details.thinking .thinking-text ul { margin: 0 0 0.5rem; }
text-overflow: ellipsis;
white-space: nowrap;
}
.nav-link { padding: 0.3rem 0.25rem; font-size: 0.72rem; }
.app-nav { gap: 0.05rem; }
/* Phase 46 (owner permission 2026-08-27, TODO.md L9): the nav links
LEAVE the bar at phone widths — the old pill-squeeze rules for
.nav-link / .app-nav (0.72rem pills, 0.05rem gap, in place of this
comment) are superseded by the #nav-toggle dropdown below. The
action pills' squeeze rules further down are untouched, and the
900px tablet block keeps squeezing the INLINE nav at 641–900px
(the hamburger is absent there). */
.nav-toggle {
display: inline-flex;
align-items: center;
justify-content: center;
width: 44px;
height: 44px;
padding: 0;
color: var(--ink);
background: none;
border: 0;
border-radius: var(--radius-sm);
cursor: pointer;
}
.nav-toggle:hover { background: var(--brand-soft); color: var(--brand-ink); }
/* The icon is sized (an unsized inline SVG would default to 300px
and blow the bar out); 20px reads as a proper hamburger inside
the 44px target. */
.nav-toggle svg { width: 20px; height: 20px; display: block; }
/* The nav becomes the dropdown. The containing block is the sticky
.app-header (.header-inner is not positioned), so the menu spans
the header's full width — edge to edge — intended on mobile;
z-index 21 = header (20) + 1, above the bar content. */
.app-nav {
position: absolute;
top: 100%;
left: 0;
right: 0;
margin-left: 0;
flex-direction: column;
gap: 0;
background: var(--surface);
border-bottom: 1px solid var(--line);
box-shadow: var(--shadow-lg);
padding: 0.5rem 0;
z-index: 21;
/* Closed state (default): invisible and non-interactive — task 02's
header.js is the only opener (.is-open + aria-expanded). */
visibility: hidden;
opacity: 0;
transform: translateY(-8px);
pointer-events: none;
transition: opacity 180ms ease, transform 180ms ease, visibility 0s linear 180ms;
}
.app-nav.is-open {
visibility: visible;
opacity: 1;
transform: none;
pointer-events: auto;
transition: opacity 180ms ease, transform 180ms ease, visibility 0s;
}
/* Menu rows: comfortable ≥44px targets (0.75rem × 2 + the 1rem line)
and readable text — replaces the old .nav-link pill squeeze. */
.app-nav .nav-link { padding: 0.75rem 1.25rem; font-size: 1rem; }
.new-chat-btn { padding: 0.4rem 0.3rem; }
.new-chat-label { display: none; }
.new-chat-btn svg { display: block; }
@@ -2248,3 +2314,13 @@ details.thinking .thinking-text ul { margin: 0 0 0.5rem; }
.footer-inner { flex-direction: column; gap: 0.2rem; text-align: center; }
main { padding-bottom: env(safe-area-inset-bottom, 0); }
}
/* Phase 46: prefers-reduced-motion stills the mobile menu — no
180ms slide+fade; open/close snaps (the visibility/opacity flip
applies instantly) and stays correct. BOTH states are named: the
.is-open rule (0,2,0) would otherwise out-specify a bare .app-nav
(0,1,0) and the OPEN transition would still animate. */
@media (prefers-reduced-motion: reduce) {
.app-nav,
.app-nav.is-open { transition: none; }
}