This merge updates a mobile fullscreen modal CSS selector assertion in the dashboard test suite, aligning it with a recent UI change to the modal structure.
Fusion-Task-Id: FN-3374
- Add reusable ConfirmDialog component, styles, and useConfirm hook to provide async confirmation flows
- Wire ConfirmProvider at app level and migrate confirm call sites across task, agent, roadmap, plugin, and settings UI actions
- Update modal interaction patterns to support dialog reentry and consistent destructive-action confirmations
- Expand dashboard tests with confirm dialog and hook coverage plus migrated component test assertions
