Revert "Fix model selector not showing loaded GPU model on CPU-detected hardware"

This reverts commit 6c5265e6b7f804836967492ff5fdb2dd3c69a236.

backend/model_service.py

@@ -1311,23 +1311,17 @@ async def list_models():
     if has_gpu and torch.cuda.is_available():
         available_vram = torch.cuda.get_device_properties(0).total_memory / (1024**3)  # GB
 
-    # Always include the currently loaded model (it's running, regardless of
-    # what the hardware check thinks — e.g. CUDA driver too old but CPU works)
-    current_model_id = manager.model_id if manager else None
-
     models = []
     for model_id, config in SUPPORTED_MODELS.items():
         model_min_device = config.get("min_device", "cpu")
 
-        # Include if: GPU backend, or CPU-compatible model, or currently loaded
-        if device_type == "gpu" or model_min_device == "cpu" or model_id == current_model_id:
+        # GPU backends can run all models
+        # CPU backends can only run CPU models
+        if device_type == "gpu" or model_min_device == "cpu":
             # Check VRAM requirements for GPU models
             is_available = True
             if has_gpu and available_vram > 0 and available_vram < config["min_vram_gb"]:
                 is_available = False
-            # Currently loaded model is always available
-            if model_id == current_model_id:
-                is_available = True
 
             models.append({
                 "id": model_id,