fix(preview): a shell prompt's trailing $ or # stays out of its folder link (#604 merge-time fix)

The folder link pattern treats `:` as a boundary and allows `$`/`#` in a path,
so every default bash prompt (`user@host:~/proj$`, `root@c:/workspace#`)
became a folder link to a path that does not exist, and clicking it showed
"Folder not found". folderLinkPath now strips them, so the link opens the
prompt's cwd.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/web/public/constants.js

@@ -2163,7 +2163,9 @@ const FOLDER_PATH_LINK_PATTERN =
  * without a slash at the end is prose, not a folder.
  */
 function folderLinkPath(candidate) {
-  const path = String(candidate || '').replace(/[.,:;!?'"]+$/, '');
+  // `$` and `#` too: a shell prompt (`user@host:~/proj$ `, `root@c:/app# `) ends
+  // its cwd with one. A folder whose name really ends in one links one short.
+  const path = String(candidate || '').replace(/[.,:;!?'"$#]+$/, '');
   if (!path || path === '~/' || /^\/[^/]+\/$/.test(path)) return null;
   if (path.endsWith('/')) return /[^/.]/.test(path) ? path : null;
   if (!path.startsWith('/') && !path.startsWith('~/')) return null;

test/file-path-link-forms.test.ts

@@ -90,6 +90,11 @@ describe('findFilePathLinks', () => {
     expect(paths('see src/a.ts:120.')).toEqual(['src/a.ts']);
   });
 
+  it("keeps a shell prompt's trailing `$` or `#` out of the folder it links", () => {
+    expect(paths('arkon@tnode:~/default/claudeman$ ls')).toEqual(['~/default/claudeman']);
+    expect(paths('root@c:/workspace/app# ls')).toEqual(['/workspace/app']);
+  });
+
   it('still finds rooted absolute paths, and never a relative path inside one', () => {
     expect(paths('sign-off from /mnt/raid1/x/refs/look_montage.png.')).toEqual(['/mnt/raid1/x/refs/look_montage.png']);
     // Unknown root: not linked at all (no `nix/store/…` cut out of it).