fixed deletion of requirements and added modal to see deleted requirements

backend/src/main.py

@@ -15,7 +15,7 @@ from src.models import (
     RequirementLinkResponse, RequirementLinkCreateRequest, RequirementSearchResult,
     RoleResponse, ProjectMemberResponse, UserRoleUpdateRequest, ROLE_DISPLAY_NAMES,
     CommentResponse, CommentReplyResponse, CommentCreateRequest, ReplyCreateRequest,
-    RequirementStatusResponse
+    RequirementStatusResponse, DeletedRequirementResponse
 )
 from src.controller import AuthController
 from src.config import get_openid, get_settings
@@ -1130,6 +1130,35 @@ async def get_requirement_history(
     return [RequirementHistoryResponse(**h) for h in history]
 
 
+@app.get("/api/projects/{project_id}/deleted-requirements", response_model=List[DeletedRequirementResponse])
+async def get_deleted_requirements(
+    project_id: int,
+    request: Request,
+    db: AsyncSession = Depends(get_db)
+):
+    """
+    Get all deleted requirements for a project.
+    Returns requirements that exist in history but have been deleted.
+    User must be a member of the project.
+    
+    Args:
+        project_id: The project to get deleted requirements for
+        
+    Returns:
+        List of deleted requirements with their last known state.
+    """
+    user = await _get_current_user_db(request, db)
+    
+    # Verify user is a member of the project
+    await _verify_project_membership(project_id, user.id, db)
+    
+    # Get deleted requirements
+    req_repo = RequirementRepository(db)
+    deleted = await req_repo.get_deleted_requirements(project_id)
+    
+    return [DeletedRequirementResponse(**d) for d in deleted]
+
+
 # ===========================================
 # Validation Endpoints
 # ===========================================