Save GLB/STL into repo exports directory and allow path

.gitignore

@@ -3,6 +3,7 @@ AGENTS.md
 __pycache__/
 *.pyc
 cache/
+exports/
 tmp/
 extensions/
 wheels/

app.py

@@ -70,10 +70,13 @@ if TRELLIS_RUNTIME not in {"original", "trellis2"}:
 
 MAX_SEED = np.iinfo(np.int32).max
 TMP_DIR = os.path.join("cache")
+EXPORT_DIR = os.path.join("exports")
 os.makedirs(TMP_DIR, exist_ok=True)
+os.makedirs(EXPORT_DIR, exist_ok=True)
 TMP_DIR_ABS = os.path.abspath(TMP_DIR)
+EXPORT_DIR_ABS = os.path.abspath(EXPORT_DIR)
 ASSETS_DIR_ABS = os.path.abspath("assets")
-ALLOWED_PATHS = [TMP_DIR_ABS, ASSETS_DIR_ABS]
+ALLOWED_PATHS = [TMP_DIR_ABS, EXPORT_DIR_ABS, ASSETS_DIR_ABS]
 
 if gr.NO_RELOAD:
     pipeline = None
@@ -227,6 +230,7 @@ def is_video_mostly_black(frames: List[np.ndarray], mean_threshold: float = 2.0)
 def start_session(req: gr.Request):
     clear_cuda_cache()
     os.makedirs(TMP_DIR, exist_ok=True)
+    os.makedirs(EXPORT_DIR, exist_ok=True)
 
 
 def end_session(req: gr.Request):
@@ -272,7 +276,7 @@ def export_stl_from_glb(glb_path: str) -> Optional[str]:
         if current_size > 0:
             mesh_to_export.vertices *= target_size_mm / current_size
         current_time_stl = datetime.now().strftime("%Y-%m%d-%H%M%S-%f")
-        stl_path = os.path.join(TMP_DIR, f"{current_time_stl}.stl")
+        stl_path = os.path.join(EXPORT_DIR, f"{current_time_stl}.stl")
         mesh_to_export.export(stl_path)
         logger.info("STL exported: %s", stl_path)
 
@@ -701,7 +705,7 @@ def extract_model_from_state(
 
         progress(0.75, desc="Exporting GLB...")
         current_time_glb = datetime.now().strftime("%Y-%m%d-%H%M%S-%f")
-        glb_path = os.path.join(TMP_DIR, f"{current_time_glb}.glb")
+        glb_path = os.path.join(EXPORT_DIR, f"{current_time_glb}.glb")
         glb.export(glb_path)
         glb_path_abs = os.path.abspath(glb_path)
         logger.info("GLB exported: %s (%d bytes)", glb_path_abs, os.path.getsize(glb_path_abs))