Terminal left in raw mode after Ctrl+C during interactive task selection

[kazupon]

When running vt run without a task specifier (interactive task selection mode), pressing Ctrl+C leaves the terminal in raw mode. This causes all subsequent terminal output (including other commands like cargo --help) to render with a "staircase" effect, where each new line starts at the horizontal position where the previous line ended.

Steps to Reproduce

1. Build: cargo build -p vite_task_bin --bin vt
2. Run ./target/debug/vt run (no task specifier, so interactive selector appears)
3. Press Ctrl+C to cancel
4. Run any command (e.g., cargo --help)
5. Observe garbled/staircase output
6. Run stty opost to restore terminal (workaround)

Expected Behavior

Terminal should be fully restored to its original state after Ctrl+C, with disable_raw_mode() called before process exit.