The control-plane view polls every few seconds and rewrites the canvas
aria-label with the new counts, but neither the canvas nor #status is a
live region, so a screen-reader user working elsewhere never hears an
advisory appear.
Add a visually hidden polite live region that speaks only when the
advisory and steering counts actually move. Re-announcing an unchanged
summary every five seconds would talk over the operator without saying
anything new, so the last announced pair is remembered and a no-change
poll writes nothing. The canvas keeps its own label as the on-demand
description.
Also give the runtime test a recording canvas context and a populated
view, so the rendered risk words, the marker shapes, and the live region
are asserted at runtime rather than only against template source. The
risk-level assertion now reads the rendered risk cells instead of the
whole panel, where a level word could be satisfied by a task id.
The populated assertions were mutation checked: collapsing the marker
shapes, dropping the risk words, freezing the canvas label, announcing
on every poll, emptying the live region, and removing the steering cue
each fail at least one assertion.
Fixes the no-regex-spaces lint error on the riskColor match, which used
two literal spaces in a row.
Co-authored-by: CommandCodeBot <noreply@commandcode.ai>
CodeRabbit correctly noted that hard-coding #2ea043 and #ff7b72 in the
test decoupled the contrast assertions from the colors the view
actually renders, so a palette change could leave them passing.
The test now reads the legend glyphs, the legend colors, the
riskColor() returns, and the body background back out of the rendered
HTML, and asserts that the legend and canvas palettes agree before
checking any ratio. Verified both directions: a mismatched canvas
color fails the palette check, and a full revert to #3fb950 fails the
luminance check at 1.01:1.
Extends the coverage to the traffic level and the body background,
which were previously unchecked.
Co-Authored-By: CommandCodeBot <noreply@commandcode.ai>
The control-plane projection encoded risk with hue alone. The clear
green #3fb950 and the resolution red #ff7b72 differ by only 1.01:1 in
relative luminance, so a red-green color-blind operator saw the same
grey for "clear" and "steer now".
Risk now carries a second, non-color channel, matching the pattern
merged for the sibling airspace view in #3193:
- markers are drawn as a circle, square, or triangle per risk level
- the legend shows the matching glyph instead of color-only dots
- the Lanes panel prints the level name next to the percentage
- the canvas gets role="img" and a live aria-label describing counts
The clear green also moves to #2ea043 so it stays separable from the
resolution red by luminance (1.34:1) while keeping 5.73:1 against the
#0b0e14 background.
Adds tests/lib/control-plane-view-ui-a11y.test.js covering the roles,
the shapes, the legend, and the contrast ratios. The existing test
harness needed a setAttribute stub for the new aria-label update.
Co-Authored-By: CommandCodeBot <noreply@commandcode.ai>
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