- Use `SlashCommand.splitNameRest` for cleaner command handling.
- Centralize `max_hint_slots` constant and add assertions.
- Refactor `Spinner` thread management and rendering code.
- Cache environment variable names to improve completion performance.
- Refactor terminal styles into constants.
- Move `isAllUpper` to `string.zig` and `meta_names` to `SlashCommand.zig`.
- Align quoted string scanning logic with the slash command parser.
- Fix typo in REPL info message.
- Optimize Recorder to avoid unnecessary allocations.
- Simplify field type detection in SlashCommand using stringToEnum.
- Remove unused yellow ANSI constant in Terminal.
- Shorten log message in McpServer.