Fixed: Removed v-model:open="isAssignmentPopoverOpen" from Popover component
Reason: This binding was preventing the popover from opening naturally
Fixed: Removed isAssignmentPopoverOpen ref
Reason: No longer needed since popover manages its own state
Fixed: Replaced popover state watcher with @click="ensureMembersLoaded"
Reason: Load members when button is clicked instead of when popover opens
Fixed: Removed manual popover closing in assignment handler
Reason: Let popover close naturally (clicking outside or on assignment)