49cb500175
- Added `wait_for_picker_scan()` function to search_db module with cancellation token support for polling picker scan completion. - Integrated picker-based file search into glob matching logic with `collect_files_from_picker()` helper to reuse shared SearchDb picker results. - Refactored fff and grep modules to use centralized `wait_for_picker_scan()` wrapper instead of direct FilePicker calls, improving cancellation handling. - Propagated SearchDb instance through agent session initialization and input controller to enable unified file picker coordination across search operations.