Enhance API and frontend components for character management and map visibility

- Updated API documentation to include `ownedByMe` field in character responses, indicating if a character was last updated by the current user's tokens.
- Modified MapView component to track and display the live status based on user-owned characters.
- Enhanced map data handling to exclude hidden maps for non-admin users and improved character icon representation on the map.
- Refactored character data structures to support new properties and ensure accurate rendering in the frontend.

internal/app/services/client.go

@@ -374,6 +374,8 @@ func (s *ClientService) UpdatePositions(ctx context.Context, data []byte) error
 		return nil
 	})
 
+	username, _ := ctx.Value(app.ClientUsernameKey).(string)
+
 	s.withChars(func(chars map[string]app.Character) {
 		for id, craw := range craws {
 			gd, ok := gridDataByID[craw.GridID]
@@ -389,8 +391,9 @@ func (s *ClientService) UpdatePositions(ctx context.Context, data []byte) error
 					X: craw.Coords.X + (gd.Coord.X * app.GridSize),
 					Y: craw.Coords.Y + (gd.Coord.Y * app.GridSize),
 				},
-				Type:    craw.Type,
-				Updated: time.Now(),
+				Type:     craw.Type,
+				Updated:  time.Now(),
+				Username: username,
 			}
 			old, ok := chars[id]
 			if !ok {
@@ -401,6 +404,7 @@ func (s *ClientService) UpdatePositions(ctx context.Context, data []byte) error
 						chars[id] = c
 					} else {
 						old.Position = c.Position
+						old.Username = username
 						chars[id] = old
 					}
 				} else if old.Type != "unknown" {
@@ -408,6 +412,7 @@ func (s *ClientService) UpdatePositions(ctx context.Context, data []byte) error
 						chars[id] = c
 					} else {
 						old.Position = c.Position
+						old.Username = username
 						chars[id] = old
 					}
 				} else {