v0.1.15

• feat(cli): interactive inplan login via the browser handoff (#15)
• fix(renderer/app): layout prefs persist across reload (StrictMode-safe); always auto-save on quit (drop the manual Save prompt); highestPrecKeymap so the collab editor's Cmd+Z works (#16)
• test: comprehensive editor unit/component matrix + App-level integration gaps (#13, #14)