Claude Code sharpens recovery, trims memory

This feels less like a flashy feature drop and more like Anthropic sanding down the rough edges that matter once people depend on Claude Code all day.

• –The biggest win is `/resume` recovering parallel tool results correctly, which should make interrupted sessions far less confusing.
• –Memory usage got real attention: 2.1.79 reports about 18MB less startup memory overall, and 2.1.80 trims roughly 80MB in large repos.
• –Security got a meaningful pass, with fixes around sandbox warnings and protected directories in bypass-permissions mode.
• –Billing and usage visibility improved too, thanks to Anthropic Console login support and the new `rate_limits` field for statusline scripts.
• –The rest of the patch set reads like serious tooling polish: better plugin discovery, better `/permissions` and `/sandbox` navigation, and fewer voice-mode and proxy edge cases.