First-run project setup surfaced a blocking "Agent with this name already exists" error when creating
the default CEO. The default first agent can be created from more than one first-run surface (the
unified ModelOnboarding agent step and the project-setup SetupWizard sub-flow), and agent names are
unique per store, so the second create returned 409. The step's goal — a first agent exists — was
already satisfied, so both onboarding surfaces now treat a name collision as success and advance
instead of blocking. The user still creates the agent; they just aren't punished for the flow offering
it twice.
Separately, the desktop header "Desktop local mode / Switch server" button did nothing: main relays
the click as a `shell:open-connection-manager` IPC (webContents.send), but the preload never forwarded
it to the `window` DOM event ShellContext listens for, so the signal was dropped. Add the preload
bridge so the button opens NativeShellConnectionManager (Local/Remote toggle + remote-server profiles),
letting operators switch between running locally, connecting to a remote server, or a different remote.
Regression tests: SetupWizard advances on an already-exists agent; preload dispatches the window event
on the IPC.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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