refactor: Rename project from dns-helper to ekdns across all files and documentation

hostfile/managed_test.go

@@ -4,7 +4,7 @@ import (
 	"strings"
 	"testing"
 
-	"dns-helper/hostfile"
+	"ekdns/hostfile"
 )
 
 // ---------------------------------------------------------------------------
@@ -253,7 +253,7 @@ func TestAssembleContent_EmptyManagedOmitsBlock(t *testing.T) {
 		t.Fatalf("expected 2 lines (no managed block), got %d: %v", len(result), result)
 	}
 	for _, line := range result {
-		if strings.Contains(line, "DNSHelper") {
+		if strings.Contains(line, "ekDNSHelper") {
 			t.Errorf("managed block markers should be absent when managed is empty: %v", result)
 		}
 	}
@@ -353,7 +353,7 @@ func TestRemoveAll_AssembleContentOmitsBlock(t *testing.T) {
 		t.Fatalf("expected 2 lines with no managed block, got %d: %v", len(result), result)
 	}
 	for _, line := range result {
-		if strings.Contains(line, "DNSHelper") {
+		if strings.Contains(line, "ekDNSHelper") {
 			t.Errorf("managed block markers should be absent after RemoveAll: %v", result)
 		}
 	}