feat: enrich search with msglib display entities

internal/mcpserver/server_test.go

@@ -9,6 +9,7 @@ import (
 	"os"
 	"reflect"
 	"sort"
+	"strings"
 	"testing"
 	"time"
 
@@ -63,7 +64,21 @@ func TestNewServerRegistersN8WinHelperToolsWithoutCallingHelper(t *testing.T) {
 	}
 }
 
+func TestNewServerFromEnvRejectsPartialMsgLibConfig(t *testing.T) {
+	clearMsgLibEnvForServerTest(t)
+	t.Setenv(EnvMsgLibSidecarExeKey, `C:\tools\MsgLibReadSidecar.exe`)
+
+	_, err := NewServerFromEnv()
+	if err == nil {
+		t.Fatal("NewServerFromEnv returned nil error for partial MsgLib config")
+	}
+	if !strings.Contains(err.Error(), EnvMsgLibSQLiteDLLKey) || !strings.Contains(err.Error(), EnvMsgLibDBKey) {
+		t.Fatalf("error = %v, want missing MsgLib env context", err)
+	}
+}
+
 func TestNewServerFromEnvUsesPacketLogFile(t *testing.T) {
+	clearMsgLibEnvForServerTest(t)
 	plaintext := `--------------------------------------------------------------------------------------------------------------------------------------------
 2026/7/7 15:30:07
 <message id="msg-env-1" from="sender@imopenfire1-lanzhou/imp_pc_4.1.2.6842" to="receiver@imopenfire1-lanzhou" type="chat">
@@ -128,6 +143,7 @@ func TestNewServerFromEnvUsesPacketLogFile(t *testing.T) {
 }
 
 func TestNewServerFromEnvUsesPacketLogDirectory(t *testing.T) {
+	clearMsgLibEnvForServerTest(t)
 	plaintext := `--------------------------------------------------------------------------------------------------------------------------------------------
 2026/7/7 15:30:07
 <message id="msg-dir-1" from="sender@imopenfire1-lanzhou/imp_pc_4.1.2.6842" to="receiver@imopenfire1-lanzhou" type="chat">
@@ -181,6 +197,14 @@ func TestNewServerFromEnvUsesPacketLogDirectory(t *testing.T) {
 	}
 }
 
+func clearMsgLibEnvForServerTest(t *testing.T) {
+	t.Helper()
+	t.Setenv(EnvMsgLibSidecarExeKey, "")
+	t.Setenv(EnvMsgLibSQLiteDLLKey, "")
+	t.Setenv(EnvMsgLibDBKey, "")
+	t.Setenv("ISPHERE_MSGLIB_PASSWORD", "")
+}
+
 func writeEncryptedPacketLogDirectoryForServerTest(t *testing.T, plaintext string) string {
 	t.Helper()
 	dir := t.TempDir()