v0.7.1 client readline removed for cross-platform compatibility with wasm, client logic fix fixes and refactor

internal/client/display/board.go

@@ -22,23 +22,23 @@ func RenderBoard(asciiBoard string) {
 			switch {
 			case char >= 'a' && char <= 'h' && isRankLine:
 				// File letters - Cyan
-				fmt.Printf("%s%c%s", Cyan, char, Reset)
+				Print(Cyan, "%c", char)
 			case char >= 'A' && char <= 'Z':
 				// White pieces - Blue
-				fmt.Printf("%s%c%s", Blue, char, Reset)
+				Print(Blue, "%c", char)
 			case char >= 'a' && char <= 'z' && !isRankLine:
 				// Black pieces - Red
-				fmt.Printf("%s%c%s", Red, char, Reset)
+				Print(Red, "%c", char)
 			case char == '.':
 				// Empty squares
-				fmt.Printf(".")
+				Print(White, ".")
 			case char >= '1' && char <= '8':
 				// Rank numbers - Cyan
-				fmt.Printf("%s%c%s", Cyan, char, Reset)
+				Print(Cyan, "%c", char)
 			case char == ' ':
-				fmt.Printf(" ")
+				Print(Reset, " ")
 			default:
-				fmt.Printf("%c", char)
+				Print(Reset, "%c", char)
 			}
 		}
 		fmt.Println()

internal/client/display/colors.go

@@ -1,6 +1,11 @@
 // FILE: lixenwraith/chess/internal/client/display/colors.go
 package display
 
+import (
+	"fmt"
+	"strings"
+)
+
 // Terminal color codes
 const (
 	Reset   = "\033[0m"
@@ -13,6 +18,35 @@ const (
 	White   = "\033[37m"
 )
 
+// C wraps text with color and reset codes
+func C(color, text string) string {
+	return color + text + Reset
+}
+
+// Print outputs colored text immediately
+func Print(color, format string, args ...any) {
+	fmt.Printf(C(color, format), args...)
+}
+
+// Println outputs colored text with newline
+func Println(color, format string, args ...any) {
+	fmt.Println(C(color, fmt.Sprintf(format, args...)))
+}
+
+// Build creates a multi-colored string
+type Builder struct {
+	parts []string
+}
+
+func (b *Builder) Add(color, text string) *Builder {
+	b.parts = append(b.parts, C(color, text))
+	return b
+}
+
+func (b *Builder) String() string {
+	return strings.Join(b.parts, "")
+}
+
 // Prompt returns a colored prompt string
 func Prompt(text string) string {
 	return Yellow + text + Yellow + " > " + Reset

internal/client/display/format.go

@@ -7,10 +7,10 @@ import (
 )
 
 // PrettyPrintJSON prints formatted JSON
-func PrettyPrintJSON(v interface{}) {
+func PrettyPrintJSON(v any) {
 	data, err := json.MarshalIndent(v, "", "  ")
 	if err != nil {
-		fmt.Printf("%sError formatting JSON: %s%s\n", Red, err.Error(), Reset)
+		Print(Red, "Error formatting JSON: %s\n", err.Error())
 		return
 	}
 	fmt.Println(string(data))