Fix JSON output for model list - output JSON before any other text

- Move JSON output to happen before table printing
- Add better error handling in webapp.py for debugging
- This fixes the web interface model list not showing

videogen

@@ -2879,9 +2879,6 @@ def show_model_details(model_id_or_name, args):
 def print_model_list(args):
     # Check if JSON output is requested
     json_output = getattr(args, 'json', False)
-    
-    if not json_output:
-        print("\nAvailable models (filtered):\n")
 
     shown = 0
     results = []
@@ -2949,6 +2946,14 @@ def print_model_list(args):
                 "base_model": info.get("base_model"),
             })
 
+    # JSON output - print and exit early (before any other output)
+    if json_output:
+        print(json.dumps(json_results, indent=2))
+        sys.exit(0)
+    
+    # Print header only for non-JSON output
+    print("\nAvailable models (filtered):\n")
+    
     if shown == 0:
         print("No models match the selected filters.")
     else:
@@ -2999,11 +3004,6 @@ def print_model_list(args):
             print(f"  {disabled_count} model(s) disabled for --auto mode")
             print(f"  Use --model <name> manually to re-enable a disabled model")
 
-    # JSON output
-    if json_output:
-        print(json.dumps(json_results, indent=2))
-        sys.exit(0)
-    
     print("\nFilters: --t2v-only, --i2v-only, --t2i-only, --v2v-only, --v2i-only, --3d-only, --tts-only, --audio-only")
     print("         --nsfw-friendly, --low-vram, --high-vram, --huge-vram")
     print("\nUse --model <name> to select a model.")

webapp.py

@@ -123,10 +123,24 @@ def get_model_list() -> List[Dict]:
             ['python3', 'videogen', '--model-list', '--json'],
             capture_output=True,
             text=True,
-            timeout=30
+            timeout=60
         )
         if result.returncode == 0:
-            return json.loads(result.stdout)
+            # Try to parse JSON from stdout
+            stdout = result.stdout.strip()
+            if stdout:
+                try:
+                    return json.loads(stdout)
+                except json.JSONDecodeError as je:
+                    print(f"JSON parse error: {je}")
+                    print(f"stdout (first 500 chars): {stdout[:500]}")
+                    print(f"stderr (first 500 chars): {result.stderr[:500]}")
+            else:
+                print(f"Empty stdout from videogen --model-list --json")
+                print(f"stderr: {result.stderr[:500]}")
+        else:
+            print(f"videogen --model-list --json failed with return code {result.returncode}")
+            print(f"stderr: {result.stderr[:500]}")
     except Exception as e:
         print(f"Error getting model list: {e}")
     return []