Tab completion does not work with ~ (tilde) for home directory paths

Description

File path tab completion in the prompt does not expand ~ to the home directory. Typing ~/clau and pressing Tab does not complete to ~/claude-code-time/ (or any path under $HOME).

Additionally, tab completion does not seem to work for relative directory paths in some cases — e.g., typing checkpoints/ did not trigger completion for files within that directory.

Steps to Reproduce

1. Open Claude Code in any directory
2. Type ~/ followed by the first few characters of a known directory in your home folder
3. Press Tab
4. Expected: Path completes to the matching directory/file
5. Actual: No completion offered

Same behavior observed with checkpoints/ — no completion for files within the directory.

Environment

• macOS (Darwin 23.6.0)
• Shell: zsh