Add volunteer wall to BmMT 2026 thank you post

[devin-ai-integration]

Summary

Adds a volunteer wall (303 names) to the BmMT 2026 thank you post. Names were compiled from:

• Berkeley_Math_Tournament-volunteers.csv (Checked In = Yes) — 271 volunteers
• BmMT 2026 Awards PDF slides 12-16 (same 271, verified)
• About page Spring 2025 staff — 35 additional names

Canonical names were resolved using the "Nametag Name" column from the volunteer sign-ups form.

Review & Testing Checklist for Human

• Scan the volunteer wall for any names that look wrong, misspelled, or shouldn't be included
• Check the deploy preview to confirm the wall renders nicely

Notes

• 303 unique volunteers after deduplication across all sources
• Names sorted alphabetically by first name
• Fixed issues from first commit: removed "UNCLEAR TODO" placeholder, deduplicated "Harishnarayanan Mahadevan", fixed "Haoran, Xi" comma issue

Link to Devin session: https://app.devin.ai/sessions/b8d2f9675c764dafa91b3e40764b1477
Requested by: @oliver-ni

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[devin-ai-integration]

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