feat: Android download page, analysis retry and a collapsible search

- /android is a public page with the latest APK, the server address to copy
  and three install steps; linked from the sign-in screen and the profile menu
- failed audio analysis can be retried from the library page, which also shows
  the most common error; the analyzer no longer burns attempts on files that
  are missing because the disk is not mounted
- the top bar search folds into a round button and slides open on click, "/"
  or Ctrl+K

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

apps/web/src/shared/ui/icons.ts

@@ -23,6 +23,8 @@ export { default as albumIcon } from '@material-symbols/svg-400/rounded/album.sv
 export { default as arrowDownIcon } from '@material-symbols/svg-400/rounded/arrow_downward.svg';
 export { default as arrowUpIcon } from '@material-symbols/svg-400/rounded/arrow_upward.svg';
 export { default as chevronRightIcon } from '@material-symbols/svg-400/rounded/chevron_right.svg';
+export { default as downloadIcon } from '@material-symbols/svg-400/rounded/download.svg';
+export { default as androidIcon } from '@material-symbols/svg-400/rounded/phone_android.svg';
 export { default as deleteIcon } from '@material-symbols/svg-400/rounded/delete.svg';
 export { default as editIcon } from '@material-symbols/svg-400/rounded/edit.svg';
 export { default as folderIcon } from '@material-symbols/svg-400/rounded/folder.svg';