test(cli): close the raw/plain capture race in the e2e plain test (#299)

capture_plain_returns_text_not_escapes gated its byte-level asserts on
the marker reaching the rendered capture, then asserted the raw capture
already carried a CR. The two captures are separate snapshots taken in
sequence, and on Windows ConPTY re-emits the echoed command in
escape-laden bursts: the marker can render (from the typed input line)
while the slightly earlier raw snapshot has yet to see a single CR —
Enter's CRLF only arrives with the command's execution. CI hit exactly
that window on x86_64-pc-windows-msvc.

Make the CR part of the settle condition the loop polls for, alongside
the marker, and name both in the timeout message so a genuine
CR-stripping regression still reads as one.

Co-authored-by: l0ng-ai <ysdpk123@gmail.com>

crates/tty7-cli/tests/cli_e2e.rs

@@ -544,11 +544,12 @@ fn capture_plain_returns_text_not_escapes(daemon: &Daemon) {
     loop {
         let raw = daemon.run_ok(&["capture", &address, "--scrollback"]);
         let plain = daemon.run_ok(&["capture", &address, "--scrollback", "--plain"]);
-        if plain.contains("tty7_e2e_plain_marker") {
-            assert!(
-                raw.contains('\r'),
-                "the default hands back the pane's bytes, CRLF included:\n{raw:?}"
-            );
+        // The marker renders as soon as the shell echoes the typed command,
+        // which can be before the pane has seen a single CR — ConPTY repaints
+        // the input line in escape-laden bursts, and `raw` is a separate,
+        // slightly earlier snapshot besides. The CR is part of what must
+        // settle, not something the marker's arrival already proves.
+        if plain.contains("tty7_e2e_plain_marker") && raw.contains('\r') {
             assert!(
                 !plain.contains('\r'),
                 "a carriage return is an instruction to the grid, not text:\n{plain:?}"
@@ -561,7 +562,8 @@ fn capture_plain_returns_text_not_escapes(daemon: &Daemon) {
         }
         assert!(
             Instant::now() < deadline,
-            "the sent text never showed up in the rendered capture; last was:\n{plain}"
+            "the captures never settled (marker rendered, CRLF in the raw \
+             bytes); last plain was:\n{plain}\nlast raw was:\n{raw:?}"
         );
         std::thread::sleep(Duration::from_millis(200));
     }