refactor(memory): replace sdk to twilight

internal/memory/adapters/helpers_test.go

@@ -0,0 +1,65 @@
+package adapters
+
+import (
+	"testing"
+	"unicode/utf8"
+)
+
+func TestTruncateSnippet_ASCII(t *testing.T) {
+	t.Parallel()
+	got := TruncateSnippet("hello world", 5)
+	if got != "hello..." {
+		t.Fatalf("expected %q, got %q", "hello...", got)
+	}
+}
+
+func TestTruncateSnippet_NoTruncation(t *testing.T) {
+	t.Parallel()
+	got := TruncateSnippet("short", 100)
+	if got != "short" {
+		t.Fatalf("expected %q, got %q", "short", got)
+	}
+}
+
+func TestTruncateSnippet_CJK(t *testing.T) {
+	t.Parallel()
+	got := TruncateSnippet("你好世界啊", 3)
+	if !utf8.ValidString(got) {
+		t.Fatalf("result is not valid UTF-8: %q", got)
+	}
+	if got != "你好世..." {
+		t.Fatalf("expected %q, got %q", "你好世...", got)
+	}
+}
+
+func TestTruncateSnippet_Emoji(t *testing.T) {
+	t.Parallel()
+	got := TruncateSnippet("😀😁😂🤣😃", 2)
+	if !utf8.ValidString(got) {
+		t.Fatalf("result is not valid UTF-8: %q", got)
+	}
+	if got != "😀😁..." {
+		t.Fatalf("expected %q, got %q", "😀😁...", got)
+	}
+}
+
+func TestTruncateSnippet_TrimWhitespace(t *testing.T) {
+	t.Parallel()
+	got := TruncateSnippet("  hello  ", 100)
+	if got != "hello" {
+		t.Fatalf("expected %q, got %q", "hello", got)
+	}
+}
+
+func TestDeduplicateItems(t *testing.T) {
+	t.Parallel()
+	items := []MemoryItem{
+		{ID: "a", Memory: "first"},
+		{ID: "b", Memory: "second"},
+		{ID: "a", Memory: "duplicate"},
+	}
+	result := DeduplicateItems(items)
+	if len(result) != 2 {
+		t.Fatalf("expected 2 items, got %d", len(result))
+	}
+}