Fix color contrast for better readability on dark backgrounds

Changed FgBlue to FgCyan in multiple locations to improve text visibility
on terminals with dark blue ANSI colors. This affects image history display,
service status indicators, container states, keyboard shortcuts, and command output.

Fixes #685

pkg/commands/image.go

@@ -46,7 +46,7 @@ func getHistoryResponseItemDisplayStrings(layer image.HistoryResponseItem) []str
 	}
 	idColor := color.FgWhite
 	if id == "<missing>" {
-		idColor = color.FgBlue
+		idColor = color.FgCyan
 	}
 
 	dockerFileCommandPrefix := "/bin/sh -c #(nop) "
@@ -62,7 +62,7 @@ func getHistoryResponseItemDisplayStrings(layer image.HistoryResponseItem) []str
 	size := utils.FormatBinaryBytes(int(layer.Size))
 	sizeColor := color.FgWhite
 	if size == "0B" {
-		sizeColor = color.FgBlue
+		sizeColor = color.FgCyan
 	}
 
 	return []string{

pkg/config/app_config.go

@@ -366,7 +366,7 @@ func GetDefaultConfig() UserConfig {
 				ActiveBorderColor:   []string{"green", "bold"},
 				InactiveBorderColor: []string{"default"},
 				SelectedLineBgColor: []string{"blue"},
-				OptionsTextColor:    []string{"blue"},
+				OptionsTextColor:    []string{"cyan"},
 			},
 			ShowAllContainers:          false,
 			ReturnImmediately:          false,

pkg/gui/presentation/containers.go

@@ -193,7 +193,7 @@ func getContainerColor(c *commands.Container) color.Attribute {
 	case "dead":
 		return color.FgRed
 	case "restarting":
-		return color.FgBlue
+		return color.FgCyan
 	case "removing":
 		return color.FgMagenta
 	default:

pkg/gui/presentation/services.go

@@ -22,7 +22,7 @@ func GetServiceDisplayStrings(guiConfig *config.GuiConfig, service *commands.Ser
 		}
 
 		return []string{
-			utils.ColoredString(containerState, color.FgBlue),
+			utils.ColoredString(containerState, color.FgCyan),
 			"",
 			service.Name,
 			"",

pkg/gui/subprocess.go

@@ -54,7 +54,7 @@ func (gui *Gui) runCommand(cmd *exec.Cmd, msg string) {
 		}
 	}()
 
-	fmt.Fprintf(os.Stdout, "\n%s\n\n", utils.ColoredString("+ "+strings.Join(cmd.Args, " "), color.FgBlue))
+	fmt.Fprintf(os.Stdout, "\n%s\n\n", utils.ColoredString("+ "+strings.Join(cmd.Args, " "), color.FgCyan))
 	if msg != "" {
 		fmt.Fprintf(os.Stdout, "\n%s\n\n", utils.ColoredString(msg, color.FgGreen))
 	}