fix: block signals in Session History to prevent recursion

ui/session_history.py

@@ -533,6 +533,9 @@ class SessionHistoryDialog(QDialog):
     def _load_projects(self):
         """Load projects for filter dropdown."""
         current = self.project_filter.currentData()
+        
+        # Block signals to prevent recursion
+        self.project_filter.blockSignals(True)
         self.project_filter.clear()
         self.project_filter.addItem("All Projects", None)
         
@@ -550,6 +553,9 @@ class SessionHistoryDialog(QDialog):
                     self.project_filter.setCurrentIndex(idx)
         except Exception:
             pass
+        finally:
+            # Re-enable signals
+            self.project_filter.blockSignals(False)
     
     def _on_filter_changed(self):
         """Handle filter changes."""