Write a warm, informative news report memorializing Bob Weir, focusing on his private health battle, his death at 78, and the Aug. 3, 2025 final concert in Golden Gate Park that celebrated the Grateful Dead’s 60th anniversary. Ground the piece in the provided details: his last performance as a joyous, historic moment; the private nature of his illness; and the tribute tone of his legacy among Deadheads and Bay Area culture. Invite the writer to weave in direct references from the sources to craft a compassionate, newspaper-style retrospective.