fix(capture): + button opens the capture sheet again in triage and tasks

Hold-to-record opened the sheet on pointerup; the click the browser sends
right after landed on the new sheet's backdrop and closed it at once.
Lists and notes have no such backdrop and kept working. A short tap now
opens on the click itself (as before), and after a hold that click is
ignored. Tests send the real pointerup + click sequence. Version 0.5.1.

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

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "mindsift-frontend",
   "private": true,
-  "version": "0.5.0",
+  "version": "0.5.1",
   "license": "Unlicense",
   "type": "module",
   "scripts": {