fix terminal corruption that could happen when onboarding and update banner (#5269)

Instead of printing characters before booting the app, make the upgrade
banner a history cell so it's well-behaved.

<img width="771" height="586" alt="Screenshot 2025-10-16 at 4 20 51 PM"
src="https://github.com/user-attachments/assets/90629d47-2c3d-4970-a826-283795ab34e5"
/>

---------

Co-authored-by: Josh McKinney <joshka@openai.com>

codex-rs/Cargo.lock

@@ -1459,6 +1459,7 @@ dependencies = [
  "pulldown-cmark",
  "rand 0.9.2",
  "ratatui",
+ "ratatui-macros",
  "regex-lite",
  "serde",
  "serde_json",
@@ -4777,6 +4778,15 @@ dependencies = [
  "unicode-width 0.2.1",
 ]
 
+[[package]]
+name = "ratatui-macros"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6fef540f80dbe8a0773266fa6077788ceb65ef624cdbf36e131aaf90b4a52df4"
+dependencies = [
+ "ratatui",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.5.15"