fix(cli): cron create by agent name, correct create/list response par…

[89rat]

…sing, data_dir in status

• cron create: resolve agent name -> UUID via /api/agents (help text already promised names); clear 'Unknown agent' error with fix hint
• cron create: parse the actual API response shape ({"result": json-string}) instead of a nonexistent top-level id, eliminating the false 'Failed: ?' on success; surface real error bodies
• cron list: read the {jobs, total} wrapper (bare array still accepted), render schedule from schedule.expr/secs and prompt from action.message, and show agent names instead of raw UUIDs
• status: include data_dir in GET /api/status; CLI falls back to home_dir for older daemons (fixes 'Data dir: ?')

Verified: cargo clippy -D warnings clean on both crates; 196 tests passing; live daemon round trip confirmed all paths.

Claude-Session: https://claude.ai/code/session_013nK3VtM7ZcEYG5mdrjQJcB

Summary

Changes

Testing

• cargo clippy --workspace --all-targets -- -D warnings passes
• cargo test --workspace passes
• Live integration tested (if applicable)

Security

• No new unsafe code
• No secrets or API keys in diff
• User input validated at boundaries