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Kpa-clawbotandyou e046a6f632 fix: mobile accessibility — touch targets, ARIA, small viewport support (#630) (#633)
## Summary

Fixes critical and major mobile accessibility items from #630, focused
on small phone viewports (320px–375px).

### Critical fixes
1. **Touch targets ≥ 44px** — All interactive elements (filter buttons,
tab buttons, search inputs, nav buttons, region pills, dropdowns) get
`min-height: 44px; min-width: 44px` via `@media (pointer: coarse)` —
desktop/mouse users are unaffected.
2. **ARIA live regions** — Added `aria-live="polite"` to: packet list
(`#pktLeft`), node list (`#nodesLeft`), analytics content
(`#analyticsContent`), live feed (`#liveFeed` with `role="log"`). Screen
readers now announce dynamic content updates.
3. **Color-only status indicators** — Status dots in live view marked
`aria-hidden="true"` (text labels like "Online"/"Degraded"/"Offline"
already present alongside).
4. **Detail panel on mobile** — Side panel (`panel-right`) renders as a
full-screen fixed overlay on ≤640px. Close button (✕) added to nodes
detail panel. Escape key closes both nodes and packets detail panels.

### Major fixes
5. **Analytics tabs overflow** — Tabs switch to `flex-wrap: nowrap;
overflow-x: auto` on ≤640px, preventing overflow on 320px screens.
6. **Table horizontal scroll** — Added `.table-scroll-wrap` class and
`min-width: 480px` on `.data-table` at ≤640px for horizontal scrolling
when columns don't fit.
7. **SPA focus management** — On every page navigation, focus moves to
first heading (`h1`/`h2`/`h3`) or falls back to `#app`. Uses
`requestAnimationFrame` for correct DOM timing.

### Bonus
- Analytics tabs get `role="tablist"` + `aria-label` for screen reader
semantics.

### Known follow-ups (not blocking)
- Individual tab buttons should get `role="tab"` + `aria-selected` +
`aria-controls` for complete ARIA tab pattern.
- `sr-status-label` and `table-scroll-wrap` CSS classes are defined but
not yet used in JS — ready for future use when status text labels and
table wrappers are wired up.

Closes #630

Co-authored-by: you <you@example.com>
2026-04-05 15:06:14 -07:00
..
2026-03-18 19:34:05 +00:00