Add new functionality for image rectification and depth metadata handling

- Implemented a preview tool for rectifying images with interactive aspect controls in `preview.py`.
- Added tests for depth metadata loading to ensure consistent schema usage in `test_depth_metadata.py`.
- Developed comprehensive tests for cutout calibration processes in `test_cutout_calibration.py`, including stability checks and depth calibration.
- Created tests for frame compositing operations in `test_frame_compositing.py`, ensuring correct handling of depth and transparency.
- Introduced material slot inheritance functionality in `material_slots.py` to manage geometry material assignments.
- Built shared shader nodes for material processing in `shader.py`, including roughness and bump mapping setups.

tests/anyimage/test_server_panel.py

@@ -18,6 +18,10 @@ class ServerPanelTest(BlenderTestCase):
                 self.assertIn(("row", label, icon), events.labels)
                 self.assertIn("anyimage.restart_server", operators)
                 self.assertIn("anyimage.stop_server", operators)
+                self.assertIn(("row", "No Models Loaded", None), events.labels)
+                self.assertIn(
+                    ("anyimage.clear_models", state == "READY"), events.operators
+                )
 
         for state in ("STOPPED", "STARTING", "ERROR"):
             with self.subTest(state=state):
@@ -27,31 +31,6 @@ class ServerPanelTest(BlenderTestCase):
                 self.assertNotIn("anyimage.stop_server", operators)
 
 
-    def test_server_panel_wraps_multiple_cached_models(self):
-        for cached_names, expected_labels in (
-            ((), [("row", "Cached: None")]),
-            (("Model A",), [("row", "Cached: Model A")]),
-            (
-                ("Model A", "Model B"),
-                [
-                    ("column", "Cached:"),
-                    ("column", "Model A"),
-                    ("column", "Model B"),
-                ],
-            ),
-        ):
-            with self.subTest(cached_names=cached_names):
-                events = self._draw_server_panel("READY", cached_names)
-                cached_labels = [
-                    (kind, text)
-                    for kind, text, _icon in events.labels
-                    if text != "Running"
-                ]
-                self.assertEqual(cached_labels, expected_labels)
-                operators = [identifier for identifier, _enabled in events.operators]
-                self.assertIn("anyimage.clear_models", operators)
-
-
     def test_status_bar_reads_runtime_state(self):
         calls = []