Fixed

• SSE double refresh: task create/update/delete was emitting two server-sent events per mutation (once from the parser’s write() and once from the route handler); removed the redundant route-level emits
• Task sidenav: clearing assignee, milestone, due date, project, or planned dates now persists correctly; previously empty values were ignored by bodyToConfig, leaving the old value in place after save
• Task sidenav: milestone select is now populated at app startup instead of only after visiting the Milestones view; milestones are also filtered by the selected project when a project is set