🎨 Palette: Add Tooltips for Financial Parameters

[aarjava]

🎨 Palette: Added helpful tooltips to financial input parameters.

💡 What: Added help text to the "Transaction Cost (bps)" and "ADV Participation %" inputs.
🎯 Why: Niche financial metrics like "bps" and "ADV" can be abstract for users. By adding concrete mathematical examples (e.g., "10 bps = 0.10%"), we make the inputs immediately comprehensible.
♿ Accessibility: Uses Streamlit's native tooltip widget (help= param) which is keyboard-accessible on hover/focus. Added a journal entry detailing this domain-specific UX pattern.

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PR created automatically by Jules for task 11607619900357691082 started by @aarjava

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