fix: screen-reader fixes for day highlights button and chips toggle

The Highlights button's aria-label overrode its content, so the visible
"· analysed" suffix was never announced — the analysed state is now
mirrored into the label (at render and when a highlights run completes).
The chips toggle's accessible text started with a stray space (left over
once the aria-hidden arrow is dropped), which read as an indent; the
separator space now lives inside the aria-hidden arrow span.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

CLAUDE.md

@@ -39,7 +39,7 @@ Dependencies: `requests` (streams), `numpy` + `soundfile` (FLAC output and FLAC
 
 `webui.html` (one `<script>` block):
 - Clip review: `clipQueue`/`clipCursor` globals, `playClip()`, `playFileSection()`, `hideClipBar()`; markup is the `#clip-bar` div. The clip label shows the wall-clock occurrence time + queue position (`03:46:20 to 03:46:22 (73 / 187)`): queue entries carry `absStart` (epoch s), derived from `fileStartEpoch(f.date)` — the filename clock — with in-file offsets as fallback for non-standard names; filename/score live in the label tooltip.
-- Day review: `dayHighlights()` builds `dayActiveSections` (chronological); `jumpToDaySection()` arms the queue. Section `absStart` comes from `fileStartEpoch(f.date)` (filename clock), mtime−duration only as fallback. **The user is blind and uses a screen reader — there is deliberately no day-timeline SVG** (one existed and was removed on request as useless); the highlights panel is linear text/buttons: summary line → key-hint note → chips toggle → chips. Do not add decorative visualizations; any future graphic must be aria-hidden and must not be the only carrier of information. Chip lists longer than 12 are collapsed behind an `aria-expanded` toggle button (the `.chips[hidden]{display:none}` rule is required — the author-level `display:flex` on `.chips` would otherwise override the UA `[hidden]` rule). Group `aria-label`s stay short ("Day loud sections") — the J/K/U/I key explanation lives only in the visible note, per user feedback against repeating info text in labels. The Highlights button is a collapse/expand toggle (`setHlExpanded()` keeps arrow + `aria-expanded` in sync, also from the day-collapse path): a built panel is kept and re-armed from `dayHlSections` instead of recomputing, keyed by `hlRow.dataset.loaded = hlParams()` (margin|gap|minDur string) so changed params force a re-run. The `#dayhls-<dayId>` "· analysed" suffix appears when every file's `cached_analysis` passes `cachedParamsMatch()`; `fetchAnalysis()` updates `f.cached_analysis` client-side so the marker survives re-renders without refetching `/api/files`.
+- Day review: `dayHighlights()` builds `dayActiveSections` (chronological); `jumpToDaySection()` arms the queue. Section `absStart` comes from `fileStartEpoch(f.date)` (filename clock), mtime−duration only as fallback. **The user is blind and uses a screen reader — there is deliberately no day-timeline SVG** (one existed and was removed on request as useless); the highlights panel is linear text/buttons: summary line → key-hint note → chips toggle → chips. Do not add decorative visualizations; any future graphic must be aria-hidden and must not be the only carrier of information. Chip lists longer than 12 are collapsed behind an `aria-expanded` toggle button (the `.chips[hidden]{display:none}` rule is required — the author-level `display:flex` on `.chips` would otherwise override the UA `[hidden]` rule). Group `aria-label`s stay short ("Day loud sections") — the J/K/U/I key explanation lives only in the visible note, per user feedback against repeating info text in labels. The Highlights button is a collapse/expand toggle (`setHlExpanded()` keeps arrow + `aria-expanded` in sync, also from the day-collapse path): a built panel is kept and re-armed from `dayHlSections` instead of recomputing, keyed by `hlRow.dataset.loaded = hlParams()` (margin|gap|minDur string) so changed params force a re-run. The `#dayhls-<dayId>` "· analysed" suffix appears when every file's `cached_analysis` passes `cachedParamsMatch()`; `fetchAnalysis()` updates `f.cached_analysis` client-side so the marker survives re-renders without refetching `/api/files`. **`aria-label` on a button replaces its visible content for screen readers** — any status text rendered inside a labelled button (like the analysed suffix) must be mirrored into the label (render path + the end of `dayHighlights()`), or the blind user never hears it. Likewise, the accessible text of a button built as `aria-hidden arrow span + text node` must not start the text node with a space (the hidden arrow drops out and the leading space reads as an indent) — keep separator spaces inside the aria-hidden span.
 - J/K/U/I/O: single document-level `keydown` listener — clip queue takes priority, in-player `currentTime` stepping is the fallback when no queue is armed; O calls `openClipInFile()` (shared with the "Open in file" button). J/K (and Prev/Next) always step in time order; U/I walk the loudest-first ranking from `scoreOrder()` — no top-N cutoff (the `#clip-top` input and `#clip-hl-only` checkbox were removed deliberately; J/K must never be affected by an auto-advance/highlights setting). Auto-advance is the `input[name="clip-adv"]` radio (off / next in time / next by loudness), read by `advanceMode()`; `stepClip(dir, byScore)` is the shared queue-stepping path. In-player U/I anchor the ranking on the section under the playhead, else start at the loudest.
 - Analysis: `fetchAnalysis()` (session `analysisCache`), `analyse()` (per-row render: meta line with section count + params, then chips — no waveform SVG, see day-review note on the blind user), `cachedParamsMatch()` (autoload guard).
 

webui.html

@@ -765,7 +765,7 @@ function renderFiles(files) {
       </h2>
       ${canHl ? `<button class="day-hl" id="dayhln-${dayId}"
         aria-expanded="false" aria-controls="dayhl-${dayId}"
-        aria-label="Day highlights for ${esc(day)}">
+        aria-label="Day highlights for ${esc(day)}${analysed ? ', analysed' : ''}">
         <span class="day-arrow" aria-hidden="true">▸</span> Highlights<span
           class="day-hl-status" id="dayhls-${dayId}"${analysed ? '' : ' hidden'}> · analysed</span></button>` : ''}`;
     section.appendChild(headBar);
@@ -1046,6 +1046,8 @@ async function dayHighlights(dayId, analyzableFiles) {
       const arrow = document.createElement('span');
       arrow.className = 'day-arrow';
       arrow.setAttribute('aria-hidden', 'true');
+      // the separator space lives inside the aria-hidden arrow: a leading
+      // space in the text node shows up as an indent in screen readers
       arrow.textContent = '▸ ';
       tog.appendChild(arrow);
       tog.appendChild(document.createTextNode(truncated
@@ -1067,8 +1069,13 @@ async function dayHighlights(dayId, analyzableFiles) {
   hlRow.dataset.loaded = hlParams();
   dayHlSections.set(dayId, dayActiveSections);
   // Every file is now cached with the current params
-  if (results.length === n)
+  if (results.length === n) {
     document.getElementById('dayhls-' + dayId)?.removeAttribute('hidden');
+    // aria-label overrides the button content, so the analysed marker has to
+    // be mirrored into it or screen readers never hear it
+    if (btn && !/, analysed$/.test(btn.getAttribute('aria-label') || ''))
+      btn.setAttribute('aria-label', btn.getAttribute('aria-label') + ', analysed');
+  }
   if (btn) btn.disabled = false;
 }