v0.1.23 — First-run polish, a faster New Session shortcut, and opt-in bundled plugins

New Session is now Cmd+T. The "New Session" shortcut moves from Cmd+Shift+R to Cmd+T across the command palette, the sidebar, and the keyboard-shortcuts list, with the welcome inbox and shortcut reference updated to match.

Bundled plugins are opt-in. Bundled integrations are discoverable in the marketplace but stay inactive until you install them — the same opt-in model adapter plugins already use — so a fresh install only loads what you turn on.

Also in this release:

• Onboarding cleanup — Provider selection starts empty so you pick exactly what you want, and creating a project mid-onboarding now selects it reliably even when the project list is still refreshing.
• Models settings — switching adapters auto-refreshes the model list with a "Discovering models…" state, and concurrent refreshes can no longer leave the spinner stuck