web UI added and refactoring done

python_app/tests/test_kamil_adc_service.py

@@ -140,6 +140,23 @@ class KamilAdcTtyReaderTest(unittest.TestCase):
         finally:
             self._close(master_fd, slave_fd, reader)
 
+    def test_corrupt_frame_fails_fast_without_resync(self) -> None:
+        """A garbage frame (bad marker) mid-stream surfaces on read; the reader does
+        NOT silently resync — fail-fast lets the producer die and the supervisor relaunch."""
+        master_fd, slave_fd, reader = self._open_pty_reader()
+        try:
+            os.write(
+                master_fd,
+                _start_frame()
+                + _point_frame(1, 10, -1)
+                + _point_frame(2, 5, 5, marker=0x001A)  # corrupt marker (not 0x000A)
+                + _start_frame(),
+            )
+            with self.assertRaises((ValueError, RuntimeError)):
+                reader.read_sweep(timeout_s=1.0)
+        finally:
+            self._close(master_fd, slave_fd, reader)
+
     def test_no_completed_sweep_times_out(self) -> None:
         master_fd, slave_fd, reader = self._open_pty_reader()
         try: