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/wanted/FollowList.svelte

@@ -13,7 +13,7 @@
   import { relativeTime } from '#lib/utils/relativeTime.js';
   import type { Follow } from '#lib/api/types.js';
 
-  // The Following tab (M502 #5520): every artist whose new releases are
+  // The Following tab: every artist whose new releases are
   // wanted, each on a release-type profile saying which kinds of release.
 
   const client = useQueryClient();