feat: Add MoGe-2 surface generation and export functionality

- Introduced new enum items for depth plane and surface models with caching.
- Added MOGE2_MESH_JOB to operators for converting images to surfaces.
- Implemented surface mesh building and exporting in RunJob operator.
- Enhanced UI to include export format options for MoGe-2.
- Created validation tools for MoGe-2 surface assets and depth planes.
- Updated geometry nodes to support new surface generation features.
- Refactored existing tests to accommodate new functionality and ensure stability.

src/snapform/models.py

@@ -139,6 +139,8 @@ MODEL_NUMBERS = {
 
 
 _ENUM_ITEMS_CACHE = {}
+_DEPTH_PLANE_ENUM_ITEMS_CACHE = {}
+_SURFACE_ENUM_ITEMS_CACHE = {}
 
 
 def enum_items(supports_gs=None, show_download_status=False):
@@ -213,9 +215,13 @@ def depth_plane_model_enum_items(_owner, _context):
         *MOGE2_MODELS.values(),
         *(model for model in MODELS.values() if model.enabled),
     ]
+    ready = tuple(model_ready(model.key) for model in models)
+    cached = _DEPTH_PLANE_ENUM_ITEMS_CACHE.get(ready)
+    if cached is not None:
+        return cached
     items = []
     for index, model in enumerate(models):
-        label = model.label if model_ready(model.key) else f"{model.label} (Missing)"
+        label = model.label if ready[index] else f"{model.label} (Missing)"
         items.append(
             (
                 model.key,
@@ -225,6 +231,22 @@ def depth_plane_model_enum_items(_owner, _context):
             )
         )
     items.append(("ORIGINAL", "Original", "Use the original image as depth", len(items)))
+    _DEPTH_PLANE_ENUM_ITEMS_CACHE[ready] = items
+    return items
+
+
+def surface_model_enum_items(owner, context):
+    depth_items = depth_plane_model_enum_items(owner, context)
+    cache_key = id(depth_items)
+    cached = _SURFACE_ENUM_ITEMS_CACHE.get(cache_key)
+    if cached is not None:
+        return cached
+    items = [
+        item
+        for item in depth_items
+        if item[0] != "ORIGINAL"
+    ]
+    _SURFACE_ENUM_ITEMS_CACHE[cache_key] = items
     return items