Help Box

Below the chat input is a collapsible panel with two independent toggle tabs (both can be open simultaneously):

Help tab:

• "Example Commands" — five command snippets in monospace (e.g., "Add a bandpass filter after the mixer", "Swap the PA and driver")
• "Block Components" — all available block components grouped by category (active, passive, boundary, support)

Chain Details tab:

• Summary: block count and connection count
• Collapsible Blocks list — each block's label and component; clicking selects it on the canvas
• Collapsible Connections list — each connection as source-port → destination-port; clicking selects the destination block

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