Add GUI

gui/_io.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+import io
+import queue
+
+
+class _QueueWriter(io.TextIOBase):
+    """Redirect sys.stdout / sys.stderr into a Queue for the Logs panel."""
+
+    def __init__(self, q: queue.Queue[str]) -> None:
+        self._q = q
+
+    def write(self, text: str) -> int:  # type: ignore[override]
+        if text:
+            self._q.put(text)
+        return len(text)
+
+    def flush(self) -> None:
+        pass