Function format_issue_full 

pub fn format_issue_full(i: &Issue, hash: &str, issues_dir: &Path) -> String

Render a full issue view (summary line + meta + body). Used by both the agent tool and the CLI. issues_dir is the store’s issues directory — when the issue is assigned, the flock holder’s provenance (pid/host/cwd) is read from .alive/ and appended; a None/missing payload (older writer, dead session) simply omits the line.