fix: add graceful error logging for BaseThread crashes

src/seedsigner/models/threads.py

@@ -7,6 +7,16 @@
 class BaseThread(Thread):
     def __init__(self):
         super().__init__(daemon=True)
+
+        # Intercept the subclass's run() method to catch silent thread crashes
+        orig_run = self.run
+        def wrapped_run():
+            try:
+                orig_run()
+            except Exception as e:
+                logger.exception(f"Thread {self.__class__.__name__} crashed: {e}")
+                self.keep_running = False
+        self.run = wrapped_run
 
     def start(self):
         logger.debug(f"{self.__class__.__name__} STARTING")

tests/test_threads.py

@@ -0,0 +1,21 @@
+import time
+import logging
+from seedsigner.models.threads import BaseThread
+
+def test_basethread_crash_handling(caplog):
+
+    # This simulates a background process (like hardware listener or scroll ui)
+    # breaking unexpectedly.
+    class ExplodingThread(BaseThread):
+        def run(self):
+            raise ValueError("Intentional Crash!")
+
+    with caplog.at_level(logging.ERROR):
+        t = ExplodingThread()
+        t.start()
+
+        time.sleep(0.1)
+
+        assert getattr(t, 'keep_running', True) is False
+
+        assert "Thread ExplodingThread crashed: Intentional Crash!" in caplog.text