Implement pump flow monitoring and UI normalization enhancements

- Rust: Add `MIN_PUMP_FLOW_ML` constant and logging for insufficient pump flow with fault handling.
- UI: Normalize config fields to maintain consistency and prevent false dirty flags after round-trips.
- KiCad: Update board zone settings for `PlantCtrlESP32` and `MPPT`.
- IntelliJ: Add `.idea` configurations for project setup and inspections.

Software/MainBoard/rust/src/main.rs

@@ -478,6 +478,17 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
                             state.flow_value_ml,
                         )
                         .await;
+                        if !dry_run && state.flow_value_ml < MIN_PUMP_FLOW_ML {
+                            log(
+                                LogMessage::PumpInsufficientFlow,
+                                (plant_id + 1) as u32,
+                                state.flow_value_ml as u32,
+                                &(MIN_PUMP_FLOW_ML as u32).to_string(),
+                                "",
+                            );
+                            board.board_hal.general_fault(true).await;
+                            board.board_hal.fault(plant_id, true).await?;
+                        }
                     }
                     Err(err) => {
                         mqtt::pump_info(
@@ -700,6 +711,8 @@ async fn safe_main(spawner: Spawner) -> FatResult<()> {
     }
 }
 
+const MIN_PUMP_FLOW_ML: f32 = 200.0;
+
 pub async fn do_secure_pump(
     board: &mut MutexGuard<'_, CriticalSectionRawMutex, HAL<'_>>,
     plant_id: usize,