v0.8.4

What's Changed

• feat(tui): tidy header/footer quick-hints; surface [s] switch + [I] team by @aoos in #258
• fix(tui): help ? — flat sections, every key visible, scrollable by @aoos in #259
• feat(tui): width-aware truncation for the help overlay by @aoos in #260
• fix(paste): inject image path as bracketed paste → real image artifact by @aoos in #262
• feat(tui): collapsible help reference + Owner field in the invite form by @aoos in #263
• test(tui): pin help-overlay viewport math at short heights by @aoos in #264
• docs(design): multi-tenant island ownership + privacy (design-first, #90/#92) by @aoos in #224
• feat(image): per-agent Dejima island primer (containment context) by @aoos in #265
• docs(site): agent-facing "How your island works" reference (island.html) by @aoos in #266

Full Changelog: v0.8.3...v0.8.4