docs: web comments say what the app does, not how it came to be (#6277)

Rewrites the web app's comments to rule 32. Task, milestone, rule and
spec ids are gone; regression stories are restated as the trap they
guard (public auth routes, the menu's stopPropagation, universal loads
under adapter-static, metric deltas with their margin). Flutter and
Tauri mentions now name the Android app or a native shell, operator
quotes and dates are dropped, and one library's counts no longer
appear outside test fixtures. Verified with a TypeScript-scanner token
comparison (template literals and regex literals re-scanned): only
comment text changed.

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

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

@@ -23,7 +23,7 @@ function req(over: Partial<MusicRequest> = {}): MusicRequest {
 
 const text = (el: HTMLElement) => (el.textContent ?? '').replace(/\s+/g, ' ').trim();
 
-// The row both Requests pages draw (#5651): the admin queue and the
+// The row both Requests pages draw: the admin queue and the
 // requester's own list read the same request the same way.
 describe('RequestRow', () => {
   test('says what was asked for, where it stands, and who or when', () => {