v1.0.0-rc8

Onboarding, billing, and release-awareness polish.

• In-cockpit release-notes timeline (press R) — read every shipped version's notes top-to-bottom in one scrollable, glamour-rendered view, so you can catch up on everything you missed in one place (#2295).
• flowforge login + flowforge update — sign in with your email and password from the CLI, and update to the latest release with a single command; the "what's new" check no longer serves a stale cached answer (#2276).
• Mac & Linux prerequisite installer — first-run setup now installs the tools FlowForge needs — tmux, the GitHub CLI, and Claude Code — so a new machine is ready without hunting down dependencies (#2268).
• Accurate billing — fixed a $0-cost reporting bug, led the summary with the total up front, and added a payment memo so invoices read clearly to your clients (#2293).
• ForgePlay reliability — fixed progress bars drifting out of sync, a resume that could trap you, and an unreadable header, so guided plays run smoothly start to finish (#2274).
• Browser-doc styling restored — backfilled the CSS for browser-rendered docs and refreshed their content stamp so documentation looks right on a fresh install (#2271).
• Steadier voice assistant — the ACE rail durably re-asserts itself after marker drift, so the assistant keeps talking instead of going quiet mid-session (#2273).
• De-flaked work tracking — work-id minting now uses a per-process monotonic counter, eliminating an intermittent collision in the work trail (#2266).