refactor: remove CursorAccountCard component and related localization entries

- Deleted the CursorAccountCard.vue component, which handled user account login and status.
- Removed associated localization entries from catalog.json and various language files.
- Updated Home.vue to eliminate references to the removed component.
- Refactored clientApi.js to remove unused account-related API functions.

internal/backend/server/upstream/mocks_test.go

@@ -6,6 +6,7 @@ import (
 	"testing"
 
 	"cursor/gen/agentv1"
+	"cursor/gen/aiserverv1"
 	legacyruntime "cursor/internal/runtime"
 
 	"google.golang.org/protobuf/proto"
@@ -54,6 +55,26 @@ func TestEncodeCLIModelsUsesAgentModelDetailsWireFormat(t *testing.T) {
 	}
 }
 
+func TestBuildServerConfigEnablesDevUserBackendCommands(t *testing.T) {
+	payload, err := buildServerConfigPayload(nil)
+	if err != nil {
+		t.Fatalf("build server config: %v", err)
+	}
+
+	encoded, err := encodeMockProto("aiserver.v1.GetServerConfigResponse", payload)
+	if err != nil {
+		t.Fatalf("encode server config: %v", err)
+	}
+
+	response := &aiserverv1.GetServerConfigResponse{}
+	if err := proto.Unmarshal(encoded, response); err != nil {
+		t.Fatalf("decode server config: %v", err)
+	}
+	if !response.GetIsDevDoNotUseForSecretThingsBecauseCanBeSpoofedByUsers() {
+		t.Fatal("expected server config to enable dev-user backend commands")
+	}
+}
+
 func TestBuildBootstrapStatsigConfigJSONDisablesAlwaysLocalDecompositionGate(t *testing.T) {
 	payload, err := buildBootstrapStatsigConfigJSON(12345, "test-auth-id")
 	if err != nil {