Upgrade Ratatui to 0.30.2 (#35959)

## What changed

- Upgrade `ratatui`, `ratatui-macros`, `crossterm`, and `ansi-to-tui`, and adapt the TUI to their updated rendering, backend, color-conversion, and cell APIs.
- Use Ratatui's cell-width and continuation-cell metadata when mapping OSC 8 hyperlinks so links remain aligned across wrapped wide glyphs and halfwidth characters with dakuten.
- Preserve explicit hyperlinks in the sign-in success screen and empty MCP state without embedding escape sequences in the text passed to Ratatui.

## Testing

- Add regression coverage for hyperlink placement across wide glyphs and halfwidth dakuten, hyperlink preservation in onboarding and MCP output, and display-width handling.

GitOrigin-RevId: 8460873e5a266923acd0417bc46264845eab0134

codex-rs/tui/src/tui.rs

@@ -1,5 +1,6 @@
 use std::fmt;
 use std::future::Future;
+use std::io;
 use std::io::IsTerminal;
 use std::io::Result;
 use std::io::Stdout;
@@ -589,7 +590,7 @@ struct PendingHistoryLines {
 
 fn clear_for_viewport_change<B>(terminal: &mut CustomTerminal<B>, new_area: Rect) -> Result<()>
 where
-    B: Backend + Write,
+    B: Backend<Error = io::Error> + Write,
 {
     let clear_position = if terminal.viewport_area.is_empty() {
         new_area.as_position()