fix(multiplayer): reconcile authoritative initial connections

server/store/server_connection_sql_test.go

@@ -0,0 +1,33 @@
+package store
+
+import (
+	"context"
+	"database/sql"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/cosmic-clash/cosmic-clash/server/domain"
+)
+
+func TestServerConnectionSQLBindsWorkloadParticipantAndLiveAssignment(t *testing.T) {
+	for _, fragment := range []string{
+		"connected_at = COALESCE", "mp.participation_active", "m.server_id = $2",
+		"a.allocation_id = $3", "a.state = 'ALLOCATED'", "assn.player_id = mp.player_id",
+		"assn.expires_at > $5", "RETURNING mp.connected_at",
+	} {
+		if !strings.Contains(ServerConnectionParticipantSQL, fragment) {
+			t.Fatalf("connection SQL missing %q: %s", fragment, ServerConnectionParticipantSQL)
+		}
+	}
+}
+
+func TestRecordPlayerConnectedRejectsInvalidArguments(t *testing.T) {
+	binding := domain.WorkloadBinding{AllocationID: "allocation-1", MatchID: "match-1", ServerID: "server-1"}
+	if err := RecordPlayerConnected(context.Background(), (*sql.DB)(nil), binding, "player-1", "connection-key-123456", time.Unix(1000, 0)); err == nil {
+		t.Fatal("nil database accepted")
+	}
+	if err := RecordPlayerConnected(context.Background(), &sql.DB{}, domain.WorkloadBinding{}, "player-1", "connection-key-123456", time.Unix(1000, 0)); err == nil {
+		t.Fatal("empty workload binding accepted")
+	}
+}