Huddle: SureFeedback parity (visual client feedback where it counts)

Imported from GitHub issue El-SaMa/hollahoop#107 by @El-SaMa.

Goal: devs collect feedback on the real page/design, like SureFeedback / ProjectHuddle. Huddle already has pins, PDF/design artifacts, guest links, WP auto-install. Audit + close gaps:

• Auto screenshot of the pinned area + browser/OS/viewport/URL metadata on every pin
• Guest commenting without account (name+email) per project/page
• Image/mockup review with versions (v1 → v2, compare) + client Approve button and approval log
• Pin status: open / in progress / resolved, assignee, due date; resolved pins hide by default
• Private (staff-only) vs client-visible comments
• Email digests + instant notify on new pin/reply; @mentions
• Pin → feedback post / GitHub issue in one click (publish guard applies)
• WordPress plugin: admin-bar toggle, only for logged-in roles or guest link, works on staging URLs
• Mobile/responsive pins anchored per breakpoint
• Short screen/video recording on a pin
• Slack/Discord/Teams notifications Test on a LAFU plugin demo site (*.demo.lanetti.fi) end to end.