Changelog

• ada9fbe Feat/config base urls (#55)
• 55d0058 Signoff: lint, tests, coverage >80% pass
• 7140feb Surface provider API errors in the TUI, and update model catalog (#59)
• 14ba403 docs(specs): add Antigravity ACP support research and design
• 633cc63 fix(tools): strip libmalloc chatter from bash tool stderr
• 3ce04c1 fix(tui): context-aware window title + popup scroll clamp (#54)
• ed9d595 refactor(acp): split initPiSessionState into named setup helpers
• e85b1fa refactor(cli): extract session wiring helpers from runNonInteractive
• 3e740ae refactor(cli): split runPing into phase helpers and a pingTarget
• 9f81101 refactor(palace): split MineProject into phase helpers
• d5bb0bb refactor(tui): dispatch Update and handleKey through named handlers
• 6a3a814 refactor(tui): split RenderSidebar into section helpers