test(groups): fix group creation unit baseline

[catwithtudou]

Summary

• Sync group creation unit tests with the current create-then-add-bots flow: createChat creates the creator chat, while additional bots are added through addBotToChat.
• Update Dashboard IPC group-create tests to mock addBotToChat and keep invalid working-directory validation fail-fast before group creation side effects.
• Add the missing isRemoteAccessEnabled global-config mock required by the /status terminal URL fixture.

Validation

• CI=true npx --yes pnpm@9.5.0 vitest run --project unit test/group-creator.test.ts test/dashboard-ipc.test.ts test/command-handler.test.ts
• CI=true npx --yes pnpm@9.5.0 build
• CI=true npx --yes pnpm@9.5.0 test still has known out-of-scope failures only in test/git-worktree.test.ts macOS /private/var path normalization and test/sandbox.test.ts opaque-dir handling.