Refactor Docker and Makefile configurations for improved build processes

- Updated docker-compose.tools.yml to mount source code at /src and set working directory for backend tools, ensuring proper Go module caching.
- Modified Dockerfile.tools to install the latest golangci-lint version compatible with Go 1.24 and adjusted working directory for build-time operations.
- Enhanced Makefile to build backend tools before running tests and linting, ensuring dependencies are up-to-date and improving overall workflow efficiency.
- Refactored test and handler files to include error handling for database operations, enhancing reliability and debugging capabilities.

internal/app/services/admin.go

@@ -101,7 +101,9 @@ func (s *AdminService) DeleteUser(ctx context.Context, username string) error {
 				return err
 			}
 			for _, tok := range u.Tokens {
-				s.st.DeleteToken(tx, tok)
+				if err := s.st.DeleteToken(tx, tok); err != nil {
+					return err
+				}
 			}
 		}
 		return s.st.DeleteUser(tx, username)
@@ -129,17 +131,25 @@ func (s *AdminService) GetSettings(ctx context.Context) (prefix string, defaultH
 func (s *AdminService) UpdateSettings(ctx context.Context, prefix *string, defaultHide *bool, title *string) error {
 	return s.st.Update(ctx, func(tx *bbolt.Tx) error {
 		if prefix != nil {
-			s.st.PutConfig(tx, "prefix", []byte(*prefix))
+			if err := s.st.PutConfig(tx, "prefix", []byte(*prefix)); err != nil {
+				return err
+			}
 		}
 		if defaultHide != nil {
 			if *defaultHide {
-				s.st.PutConfig(tx, "defaultHide", []byte("1"))
+				if err := s.st.PutConfig(tx, "defaultHide", []byte("1")); err != nil {
+					return err
+				}
 			} else {
-				s.st.DeleteConfig(tx, "defaultHide")
+				if err := s.st.DeleteConfig(tx, "defaultHide"); err != nil {
+					return err
+				}
 			}
 		}
 		if title != nil {
-			s.st.PutConfig(tx, "title", []byte(*title))
+			if err := s.st.PutConfig(tx, "title", []byte(*title)); err != nil {
+				return err
+			}
 		}
 		return nil
 	})
@@ -264,7 +274,9 @@ func (s *AdminService) WipeTile(ctx context.Context, mapid, x, y int) error {
 			return err
 		}
 		for _, id := range ids {
-			grids.Delete(id)
+			if err := grids.Delete(id); err != nil {
+				return err
+			}
 		}
 		return nil
 	}); err != nil {
@@ -310,7 +322,9 @@ func (s *AdminService) SetCoords(ctx context.Context, mapid, fx, fy, tx2, ty int
 				g.Coord.X += diff.X
 				g.Coord.Y += diff.Y
 				raw, _ := json.Marshal(g)
-				grids.Put(k, raw)
+				if err := grids.Put(k, raw); err != nil {
+					return err
+				}
 			}
 			return nil
 		}); err != nil {
@@ -367,7 +381,9 @@ func (s *AdminService) HideMarker(ctx context.Context, markerID string) error {
 		}
 		m.Hidden = true
 		raw, _ = json.Marshal(m)
-		grid.Put(key, raw)
+		if err := grid.Put(key, raw); err != nil {
+			return err
+		}
 		return nil
 	})
 }