chore: more clippy rules 2 (#4057)

The only file to watch is the cargo.toml
All the others come from just fix + a few manual small fix

The set of rules have been taken from the list of clippy rules
arbitrarily while trying to optimise the learning and style of the code
while limiting the loss of productivity

codex-rs/tui/src/markdown_stream.rs

@@ -310,10 +310,8 @@ mod tests {
         let long = "> This is a very long quoted line that should wrap across multiple columns to verify style preservation.";
         let out = super::simulate_stream_markdown_for_tests(&[long, "\n"], true, &cfg);
         // Wrap to a narrow width to force multiple output lines.
-        let wrapped = crate::wrapping::word_wrap_lines(
-            out.iter().collect::<Vec<_>>(),
-            crate::wrapping::RtOptions::new(24),
-        );
+        let wrapped =
+            crate::wrapping::word_wrap_lines(out.iter(), crate::wrapping::RtOptions::new(24));
         // Filter out purely blank lines
         let non_blank: Vec<_> = wrapped
             .into_iter()