docs: the history phrases the id sweep missed, restated as present-tense facts or traps (#6277)

A wider pass for "previous", "before the fix", "we shipped" and the
like. The chi double-subtree, uppercase Vorbis key and stopPropagation
comments now describe the trap they guard; commit hashes, CI run
numbers and a deleted file name are gone; uuidString's comment says
what it returns.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/src/lib/components/DiscoverResultCard.test.ts

@@ -70,15 +70,12 @@ describe('DiscoverResultCard', () => {
     expect(onRequest).not.toHaveBeenCalled();
   });
 
-  // NOTE: previous versions of this file asserted .badge-row { min-height: 22px
-  // } and .actions { margin-top: auto } via getComputedStyle, which only worked
-  // because the component shipped inline style="" attributes — a layering
-  // violation. Stylesheet introspection (document.styleSheets) was tried as a
-  // replacement, but vitest's @testing-library/svelte renderer does not inject
-  // the component's scoped <style> block into jsdom (styleSheets.length === 0).
-  // Asserting "CSS exists in CSS" has weak value anyway, so the layout
-  // discipline (reserved badge slot + bottom-anchored actions) is enforced
-  // visually at the consumer page rather than as a unit test here.
+  // The layout discipline (reserved badge slot + bottom-anchored actions) is
+  // not asserted here: vitest's @testing-library/svelte renderer does not
+  // inject the component's scoped <style> block into jsdom
+  // (styleSheets.length === 0), so getComputedStyle sees nothing, and
+  // asserting "CSS exists in CSS" has weak value anyway. It is checked
+  // visually at the consumer page.
 
   test('renders <img> when imageUrl is set', () => {
     const { container } = render(DiscoverResultCard, {

web/src/lib/components/SuggestionFeed.test.ts

@@ -210,10 +210,10 @@ describe('SuggestionFeed snooze (#2375)', () => {
     expect(screen.getByText(/back in 14 days/i)).toBeInTheDocument();
   });
 
-  // Pins the days→months seam. The singular branch was originally dead code
-  // here too: the threshold (45) sat above the divisor (30), so no day count
-  // could round to one month without hitting the days branch first. Kept in
-  // lockstep with SuggestionSnoozeRefTest on Android.
+  // Pins the days→months seam: with a threshold above the divisor (45 vs 30),
+  // no day count could round to one month without hitting the days branch
+  // first, and the singular branch would be dead code. Kept in lockstep with
+  // SuggestionSnoozeRefTest on Android.
   test('the days-to-months boundary sits at 30 days, so "a month" is reachable', () => {
     setSuggestions([]);
     setSnoozes([

web/src/lib/utils/shuffle.ts

@@ -2,7 +2,7 @@
  * A shuffled copy of `items` (Fisher–Yates). The input is not touched.
  *
  * The one copy for every Shuffle control: the album and playlist headers
- * and the artist card's play button each had their own before this.
+ * and the artist card's play button.
  */
 export function shuffled<T>(items: readonly T[]): T[] {
   const arr = items.slice();