Feat/annotation management system

[sam4coding]

Title: feat: integrate annotation management system and align with upstream refactoring

Description:
This PR introduces the Project Manager module for handling large-scale scientific image annotation tasks. It also includes critical fixes to align the codebase with the recent upstream/main refactoring (specifically the sunset synanno changes).

Key Changes:

Module Integration: Added ProjectManager for task distribution, tracking, and high-priority assignments.

Upstream Alignment: * Cleaned up deprecated component references (WorkflowSelector, ProofReading, WormErrorHandling, EHTool) following the upstream synanno sunset.

    Reorganized view directory structures to match the new official module layout.

Bug Fixes: * Resolved CORSMiddleware configuration conflicts in server_api/main.py.

    Fixed module import paths in Views.js and MaskProofreading.js caused by directory restructuring.

Backend Support: Updated the API server to handle dynamic task queries and JSON-based persistence.

Verification:

npm run build passes successfully.

python3 -m py_compile verifies backend syntax.

Manual test: Verified ProjectManager displays tasks and correctly handles assignee filtering.