41a98b5743
New v0.3 P0 entry 3-4: kubectl-style context-management subtree using gh's `<noun> <verb>` surface convention consistent with the rest of this CLI. - context list: tabwriter rendering + --json envelope; reads config.yaml only. - context add <name> --host <url> [--user]: validates http(s) URL, first context auto-becomes current, rejects duplicates with did-you-mean. - context remove <name>: best-effort keyring cleanup like `auth logout`. Removing the current context triggers exit-10 confirmation (lark-cli skill protocol) — subsequent commands would lose their default --context. (`context use` predates v0.3; the subtree was previously use-only.) Bugs caught and fixed inline by the post-commit reviewer round: - auth login was accepting `http://` (empty host portion) because the old validateHost only checked the scheme. New cmdutil.NormalizeHost (shared by both login and context add) requires u.Host != "". - context add's validateName claimed `..` was rejected but only denied / \\ space. Switched to positive allowlist [A-Za-z0-9._-] plus explicit ./../path-separator rejection. Helper consolidation: - cli/internal/cmdutil/host.go: NormalizeHost (trim, scheme, host non-empty) — both auth login and context add share it. - cli/internal/format/dash.go: DashIfEmpty — promoted from copies in cmd/auth/list.go and cmd/context/list.go. - recordingStore test stub dropped in favor of secrets.NewMemStore; contextKeyList test helper replaced by the existing contextKeys. 14 unit tests; 13 e2e branches verified. Roadmap: 3-4.