When no team can be determined, issue mine (and its list alias) now uses
the same message as issue query — 'No default team configured and no team
scope provided' — instead of the inaccurate 'Could not determine team key
from directory name or team flag' (the team only ever comes from the
--team flag, LINEAR_TEAM_ID, or team_id config; directory names are not
consulted). The error now carries a suggestion: always offer --team
<key>, and when run inside a git work tree, also point at linear config,
which links the repository to a team by generating .linear.toml.
Repo detection is a new best-effort isInsideGitRepo() helper: any git
failure (not a repo, dubious ownership) counts as false so the optional
hint can never turn the team error into a git crash. The same stale
message remains in cycle-list, cycle-view, team-states, and team-members;
those are deferred so they can adopt the helper in a follow-up.
Peter Schilling