revamp /status (#4196)

<img width="543" height="520" alt="image"
src="https://github.com/user-attachments/assets/bbc0eec0-e40b-45e7-bcd0-a997f8eeffa2"
/>

codex-rs/tui/src/lib.rs

@@ -60,6 +60,7 @@ mod resume_picker;
 mod session_log;
 mod shimmer;
 mod slash_command;
+mod status;
 mod status_indicator_widget;
 mod streaming;
 mod text_formatting;