v0.4.1

Mermaid Layout Direction

• New "Layout Direction: TD vs LR" section in libraries.md
• Prefer flowchart TD (top-down) over flowchart LR (left-to-right) for complex diagrams
• LR spreads horizontally and makes labels unreadable with many nodes
• Rule: use TD for 5+ nodes or any branching; LR only for simple 3-4 node linear flows

Documentation

• Simplified README: trimmed Usage section, consolidated Install, added Slide Deck Mode section
• Added /generate-visual-plan to command table