Adding python files

src/gui/tabs/validation_tab.py

@@ -0,0 +1,46 @@
+"""
+Validation tab for the microscopy object detection application.
+"""
+
+from PySide6.QtWidgets import QWidget, QVBoxLayout, QLabel, QGroupBox
+
+from src.database.db_manager import DatabaseManager
+from src.utils.config_manager import ConfigManager
+
+
+class ValidationTab(QWidget):
+    """Validation tab placeholder."""
+
+    def __init__(
+        self, db_manager: DatabaseManager, config_manager: ConfigManager, parent=None
+    ):
+        super().__init__(parent)
+        self.db_manager = db_manager
+        self.config_manager = config_manager
+
+        self._setup_ui()
+
+    def _setup_ui(self):
+        """Setup user interface."""
+        layout = QVBoxLayout()
+
+        group = QGroupBox("Validation")
+        group_layout = QVBoxLayout()
+        label = QLabel(
+            "Validation functionality will be implemented here.\n\n"
+            "Features:\n"
+            "- Model validation\n"
+            "- Metrics visualization\n"
+            "- Confusion matrix\n"
+            "- Precision-Recall curves"
+        )
+        group_layout.addWidget(label)
+        group.setLayout(group_layout)
+
+        layout.addWidget(group)
+        layout.addStretch()
+        self.setLayout(layout)
+
+    def refresh(self):
+        """Refresh the tab."""
+        pass