* Done! I've updated the error message in [`github_service.rs`](file:///private/var/folders/m1/9q_ct1913z10v6wbnv54j25r0000gn/T/vibe-kanban/worktrees/vk-93a7-update-fai/crates/services/src/services/github_service.rs#L208-L218). Now when a PR creation fails because the base branch doesn't exist (and it's not already "main"), users will see:
`"Base branch 'feature-branch' does not exist: [error]. Perhaps you meant to use main as your base branch instead?"`
The hint only appears when the requested base branch is not "main", keeping the message clean for cases where "main" itself doesn't exist.
* fmt
aedbce5c4f