Assessment: 🟢 APPROVE

No bugs introduced by this PR. The direction-parsing logic and render path change are correct:

• The direction keyword branch in parseState always executes continue — the only potentially affected syntax (state direction as Foo) uses an unquoted label, which the existing state branch would reject via readQuoted() anyway, so no valid statement is dropped.
• Switching DiagramState from drawMermaidGraph to drawMermaidFlowchart with an empty direction string safely falls through to the same drawMermaidGraph call with identical arguments — no behavioural regression for undirected state diagrams.