test: fix test_wait_until_pane_ready for CI environments

- Modified the test to dynamically detect and use the current shell prompt ($ or %)
- This makes the test more robust across different environments including CI
- Previously the test was hardcoded to use '%' which works locally with zsh but fails in CI with bash

Author: tony

tests/test/test_waiter.py

@@ -196,9 +196,16 @@ def test_wait_until_pane_ready(wait_pane: Pane) -> None:
     content_str = "\n".join(content)
     assert content_str  # Ensure it's not None or empty
 
-    # We know from the test that the shell prompt is using '%' (zsh)
-    # So we'll use that directly rather than trying to detect it
-    result = wait_until_pane_ready(wait_pane, shell_prompt="%")
+    # Check for the actual prompt character to use
+    if "$" in content_str:
+        prompt = "$"
+    elif "%" in content_str:
+        prompt = "%"
+    else:
+        prompt = None  # Use auto-detection
+
+    # Use the detected prompt or let auto-detection handle it
+    result = wait_until_pane_ready(wait_pane, shell_prompt=prompt)
 
     assert result.success
     assert result.content is not None