Worklog

T024 – Function group and function editor UI improvements

Backend: Added start_date, end_date columns to project_function_groups table (alembic migration cfe638817921). Added function_type column (String 50, default 'crew') to project_functions table.
Pydantic schemas: Updated ProjectFunctionGroupCreateRequest, ProjectFunctionGroupUpdateRequest, ProjectFunctionGroupResponse, ProjectFunctionCreateRequest, ProjectFunctionUpdateRequest, ProjectFunctionResponse to include new fields.
Frontend: Updated FunctionGroupEditor.tsx interfaces and state to support function_type dropdown (crew/equipment/transport), start_date, end_date date pickers for function groups. Added date display in group headers and function type badge in function rows.
Tests: Backend health check passed (200). Frontend tsc --noEmit exit 0, vite build successful.
Commit: e14edd5 on master.