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fix(tui): breathe running glyph symmetrically instead of blanking at the trough

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The running status glyph clipped its cosine throb to a blank column below
STATUS_FADE_MIN_OPACITY, so each breath read as bold->dim->disappear rather
than bold->dim->bold. Remove the cutoff and the constant; the trough now
renders as the dimmest gray, giving a symmetric breathe. Turn-boundary
appear/disappear is unchanged (fade envelope and non-truecolor visible
threshold).
This commit is contained in:
Turtle
2026-07-27 19:32:15 +08:00
parent f9d2ab09ea
commit 84fe617a01
2 changed files with 22 additions and 30 deletions
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12
packages/ui/tui/tests/tui.spec.ts
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@@ -1616,7 +1616,7 @@ describe('pi-tui chat lifecycle and transcript', () => {
return r
}
it('throbs the running glyph in dim gray, swelling from invisible to full, never accent', async () => {
it('throbs the running glyph in dim gray, breathing between trough and full without blanking, never accent', async () => {
let clock = 0
let chunkIndex = 0
const result = await setup({ status: 'running', config: { theme: { color: true, truecolor: true } }, now: () => clock })
@@ -1631,11 +1631,13 @@ describe('pi-tui chat lifecycle and transcript', () => {
return result.terminal.output
}
// The pulse swells from fully invisible at its trough to the settled peak
// and back. At phase 0 (t=1400, pulse level 0, past fade-in) the glyph is
// hidden — the slot carries no ● — so the dimmest breath truly disappears.
// The pulse breathes between the dimmest trough gray and the settled peak
// and back, never blanking. At phase 0 (t=1400, pulse level 0, past fade-in)
// the glyph still paints the trough gray, so the breath dims but never
// disappears — a symmetric bold→dim→bold throb.
const trough = await frameAt(1_400)
expect(trough).not.toMatch(/●/u)
expect(trough).toMatch(/●/u)
expect(glyphGray(trough)).toBe(43)
// Half a period later (t=2100, pulse peak) it paints the brightest gray.
const peak = await frameAt(2_100)
expect(glyphGray(peak)).toBe(136)