fix(import-existing-worktrees): import existing worktrees on load/pro…

[JayGhiya]

1. src-tauri/src/projects/commands.rs: added helper functions to normalize paths and compare Git worktrees against Jean-tracked worktrees safely.
2. src-tauri/src/projects/commands.rs: tightened import_worktree so manual import only accepts existing, untracked paths that actually belong to the selected repo’s Git worktree list.
3. src-tauri/src/projects/commands.rs: added sync_project_worktrees to silently import missing Git worktrees into Jean storage, save once, and emit worktrees:changed.
4. src-tauri/src/lib.rs: registered sync_project_worktrees in the native Tauri command handler.
5. src-tauri/src/http_server/dispatch.rs: registered the same command for web/headless WebSocket dispatch so it works outside native IPC too.
6. src/services/projects.ts: added syncProjectWorktrees(projectId) as the frontend wrapper around the new backend sync command.
7. src/services/projects.ts: added useSyncProjectWorktrees(projectId, enabled) to run opportunistic background sync through TanStack Query.
8. src/components/projects/ProjectTreeItem.tsx: mounted that sync hook when a project is selected or expanded, so Jean reconciles active projects instead of scanning all projects on startup.
9. src/components/projects/panes/GeneralPane.tsx: after saving or resetting worktrees_dir, immediately re-runs the same silent sync so externally existing worktrees show up right away.
10. e2e/fixtures/invoke-handlers.ts: added the sync_project_worktrees mock handler so E2E/tests remain compatible with the new frontend sync flow.

If this looks correct will also enable manual refresh. This would be required as people inside jean terminal or ghostty/cmux use https://worktrunk.dev . it is a great way to manage worktrees plus setup scripts if worktrunk looks good iin future we can ensure to add this as a primitive for jean

[JayGhiya]

Pushing manual sync too.

[JayGhiya]

@andrasbacsai please let me know any feedback :)

[JayGhiya]

would appreciate this getting merged to solve the onboarding friction i personally have and lot of other people that want to try jean might have @andrasbacsai