Improve reactor controls, reactions, and maintenance UI

src/reactor_sim/control.py

@@ -27,7 +27,8 @@ class ControlSystem:
         if self.manual_control:
             return self.rod_fraction
         error = (state.power_output_mw - self.setpoint_mw) / self.setpoint_mw
-        adjustment = -error * 0.3
+        # When power is low (negative error) withdraw rods; when high, insert them.
+        adjustment = error * 0.2
         adjustment = clamp(adjustment, -constants.CONTROL_ROD_SPEED * dt, constants.CONTROL_ROD_SPEED * dt)
         previous = self.rod_fraction
         self.rod_fraction = clamp(self.rod_fraction + adjustment, 0.0, 0.95)