fix: change permission

CLAUDE.md

@@ -54,7 +54,7 @@ Two independent mechanisms — don't cross-wire them:
 - PostgreSQL via `Npgsql.EntityFrameworkCore.PostgreSQL` 10. Connection string key is `ConnectionStrings:Default` (see [Mws.Api/appsettings.json](Mws.Api/appsettings.json)); fallback to `localhost:5432` dev creds `mws/mws`. Override via env if you must.
 - Enum columns are stored as `varchar(20)` (not ints) — preserve that for any new enum.
 - Self-referencing `Document.ParentId` uses `Restrict` to block accidental cycles. Cascade delete is implemented in `DeleteDocumentHandler` via a manual descendant walk (`DocumentAccess.DeleteDescendantsAsync`); do not switch the FK to cascade.
-- `DbSeeder` ([Mws.Infrastructure/Persistence/DbSeeder.cs](Mws.Infrastructure/Persistence/DbSeeder.cs)) seeds two system roles (`Admin` — full CRUD on every screen; `Member` — CRUD on everything except Users/Permissions/Master Data, no delete) plus admin/alice/bob (password: `password`, admin → Admin role, alice/bob → Member) and one demo project on first boot. Skips if any users exist. System roles (`Role.IsSystem = true`) can't be deleted via `DeleteRoleCommand`.
+- `DbSeeder` ([Mws.Infrastructure/Persistence/DbSeeder.cs](Mws.Infrastructure/Persistence/DbSeeder.cs)) seeds two system roles (`Admin` — full CRUD on every screen; `Member` — view-only on Projects, CRUD on Tasks/Documents (no delete), and no access to Users/Permissions/Master Data) plus admin/alice/bob (password: `password`, admin → Admin role, alice/bob → Member) and one demo project on first boot. System roles are re-synced to this canonical permission matrix on every startup (`SyncSystemRoleAsync`), so edits made to them through the Roles UI do not persist across restarts. Skips user/project seeding if any users exist. System roles (`Role.IsSystem = true`) can't be deleted via `DeleteRoleCommand`.
 
 ### Config
 

application/Projects/Commands/ArchiveProject.cs

@@ -1,21 +1,19 @@
 using MediatR;
 using mws.backend.dotnet.application.Common;
+using mws.backend.dotnet.application.Permissions;
 using mws.backend.dotnet.domain.Projects;
 
 namespace mws.backend.dotnet.application.Projects;
 
 public record ArchiveProjectCommand(Guid UserId, Guid ProjectId) : IRequest;
 
-public class ArchiveProjectHandler(IUnitOfWork uow) : IRequestHandler<ArchiveProjectCommand>
+public class ArchiveProjectHandler(IUnitOfWork uow, IPermissionService permissions) : IRequestHandler<ArchiveProjectCommand>
 {
     public async Task Handle(ArchiveProjectCommand command, CancellationToken ct)
     {
-        var project = await ProjectAccess.GetForUserOrThrowAsync(uow, command.UserId, command.ProjectId, ct);
+        await permissions.EnsureAsync(command.UserId, "projects", PermissionAction.Delete, ct);
 
-        if (await uow.Projects.GetMemberRoleAsync(command.ProjectId, command.UserId, ct) != MemberRole.Owner)
-        {
-            throw new ForbiddenException("Only the project owner can archive the project");
-        }
+        var project = await ProjectAccess.GetForUserOrThrowAsync(uow, command.UserId, command.ProjectId, ct);
 
         project.Status = ProjectStatus.Archived;
         project.UpdatedAt = DateTime.UtcNow;

application/Projects/Commands/CreateProject.cs

@@ -1,16 +1,19 @@
 using AutoMapper;
 using MediatR;
 using mws.backend.dotnet.application.Common;
+using mws.backend.dotnet.application.Permissions;
 using mws.backend.dotnet.domain.Projects;
 
 namespace mws.backend.dotnet.application.Projects;
 
 public record CreateProjectCommand(Guid UserId, CreateProjectRequest Request) : IRequest<ProjectDto>;
 
-public class CreateProjectHandler(IUnitOfWork uow, IMapper mapper) : IRequestHandler<CreateProjectCommand, ProjectDto>
+public class CreateProjectHandler(IUnitOfWork uow, IMapper mapper, IPermissionService permissions) : IRequestHandler<CreateProjectCommand, ProjectDto>
 {
     public async Task<ProjectDto> Handle(CreateProjectCommand command, CancellationToken ct)
     {
+        await permissions.EnsureAsync(command.UserId, "projects", PermissionAction.Create, ct);
+
         var request = command.Request;
         if (string.IsNullOrWhiteSpace(request.Name))
         {

application/Projects/Commands/UpdateProject.cs

@@ -1,22 +1,19 @@
 using AutoMapper;
 using MediatR;
 using mws.backend.dotnet.application.Common;
-using mws.backend.dotnet.domain.Projects;
+using mws.backend.dotnet.application.Permissions;
 
 namespace mws.backend.dotnet.application.Projects;
 
 public record UpdateProjectCommand(Guid UserId, Guid ProjectId, UpdateProjectRequest Request) : IRequest<ProjectDto>;
 
-public class UpdateProjectHandler(IUnitOfWork uow, IMapper mapper) : IRequestHandler<UpdateProjectCommand, ProjectDto>
+public class UpdateProjectHandler(IUnitOfWork uow, IMapper mapper, IPermissionService permissions) : IRequestHandler<UpdateProjectCommand, ProjectDto>
 {
     public async Task<ProjectDto> Handle(UpdateProjectCommand command, CancellationToken ct)
     {
-        var project = await ProjectAccess.GetForUserOrThrowAsync(uow, command.UserId, command.ProjectId, ct);
+        await permissions.EnsureAsync(command.UserId, "projects", PermissionAction.Edit, ct);
 
-        if (MemberRole.Owner != await uow.Projects.GetMemberRoleAsync(command.ProjectId, command.UserId, ct))
-        {
-            throw new ForbiddenException("Only the project owner can update the project");
-        }
+        var project = await ProjectAccess.GetForUserOrThrowAsync(uow, command.UserId, command.ProjectId, ct);
 
         var request = command.Request;
         if (string.IsNullOrWhiteSpace(request.Name))

infrastructure/Persistence/DbSeeder.cs

@@ -134,29 +134,58 @@ public static class DbSeeder
     {
         var now = DateTime.UtcNow;
 
-        if (!await db.Roles.AnyAsync(r => r.Name == "Admin"))
-        {
-            var adminRole = new Role { Id = Guid.NewGuid(), Name = "Admin", IsSystem = true, CreatedAt = now, UpdatedAt = now };
-            adminRole.Permissions = ScreenCatalog.Screens.Select(s => new RolePermission
+        await SyncSystemRoleAsync(
+            db,
+            "Admin",
+            _ => (View: true, Create: true, Edit: true, Delete: true),
+            now);
+
+        await SyncSystemRoleAsync(
+            db,
+            "Member",
+            screen => screen.Key switch
             {
-                RoleId = adminRole.Id, Screen = s.Key, CanView = true, CanCreate = true, CanEdit = true, CanDelete = true,
-            }).ToList();
-            db.Roles.Add(adminRole);
-            await db.SaveChangesAsync();
+                "users" or "permissions" or "masterdata" => (View: false, Create: false, Edit: false, Delete: false),
+                "projects" => (View: true, Create: false, Edit: false, Delete: false),
+                _ => (View: true, Create: true, Edit: true, Delete: false),
+            },
+            now);
+    }
+
+    private static async Task SyncSystemRoleAsync(
+        AppDbContext db,
+        string name,
+        Func<ScreenDefinition, (bool View, bool Create, bool Edit, bool Delete)> rule,
+        DateTime now)
+    {
+        var role = await db.Roles
+            .Include(r => r.Permissions)
+            .FirstOrDefaultAsync(r => r.Name == name);
+
+        if (role is null)
+        {
+            role = new Role { Id = Guid.NewGuid(), Name = name, IsSystem = true, CreatedAt = now, UpdatedAt = now };
+            db.Roles.Add(role);
         }
 
-        if (!await db.Roles.AnyAsync(r => r.Name == "Member"))
+        var byScreen = role.Permissions.ToDictionary(p => p.Screen);
+        foreach (var screen in ScreenCatalog.Screens)
         {
-            var memberRole = new Role { Id = Guid.NewGuid(), Name = "Member", IsSystem = true, CreatedAt = now, UpdatedAt = now };
-            memberRole.Permissions = ScreenCatalog.Screens
-                .Where(s => s.Key is not ("users" or "permissions" or "masterdata"))
-                .Select(s => new RolePermission
-                {
-                    RoleId = memberRole.Id, Screen = s.Key, CanView = true, CanCreate = true, CanEdit = true, CanDelete = false,
-                }).ToList();
-            db.Roles.Add(memberRole);
-            await db.SaveChangesAsync();
+            if (!byScreen.TryGetValue(screen.Key, out var permission))
+            {
+                permission = new RolePermission { RoleId = role.Id, Screen = screen.Key };
+                role.Permissions.Add(permission);
+            }
+
+            var (view, create, edit, delete) = rule(screen);
+            permission.CanView = view;
+            permission.CanCreate = create;
+            permission.CanEdit = edit;
+            permission.CanDelete = delete;
         }
+
+        role.UpdatedAt = now;
+        await db.SaveChangesAsync();
     }
 
     private static async Task<User> EnsureUserAsync(AppDbContext db, IPasswordHasher passwordHasher, string username, string displayName, string roleName)