Improve profile role membership UX and harden stale form/session handling

[Rvice]

Summary

Improves the profile role membership experience by replacing disruptive reloads with inline updates, preserving in-progress edits more reliably, and fixing several stale token/session edge cases uncovered during testing.

Highlights

• Update role membership rows inline instead of reloading the full section for common edit and delete actions.
• Move memberships between Current, Former, and Future sections in place when date changes reclassify them.
• Keep membership dates, duration badges, and section visibility in sync after inline changes.
• Refresh profile memberships after changes made in the Change Role Memberships modal.
• Fix checkbox autosave in the modal after a client-side path regression.
• Harden membership and login flows against stale form/session state.

User-facing improvements

• Removing a role membership no longer reloads the full role memberships area.
• Editing membership dates updates the visible row immediately when possible.
• Memberships that become former or future memberships move into the correct section without a full refresh.
• Former and Future sections are shown or hidden correctly when memberships move.
• Date displays continue to follow the configured system date format.
• Other unsaved inline membership edits are preserved more reliably during fallback reloads.

Stability fixes

• Added fallback CSRF handling for inline membership forms and modal-driven membership changes.
• Improved stale form handling for profile membership updates.
• Prevented a stale login form/session mismatch from causing a fatal error after redirecting to login.

Internal cleanup

• Moved profile membership helper logic out of the PHP-generated script block into shared profile JavaScript.
• Replaced packed row-sort metadata with explicit sortable fields and a clearer client-side comparator.

Testing

Validated with targeted syntax checks on the touched PHP files, including mirrored deployment copies where applicable.