Update project structure and configurations

crates/components/src/fan.rs

@@ -238,6 +238,30 @@ impl Fan<Disconnected> {
 }
 
 impl Fan<Connected> {
+    /// Creates a new connected fan from pre-connected ports.
+    pub(crate) fn from_connected_parts(
+        curves: FanCurves,
+        port_inlet: Port<Connected>,
+        port_outlet: Port<Connected>,
+        air_density: f64,
+    ) -> Result<Self, ComponentError> {
+        if air_density <= 0.0 {
+            return Err(ComponentError::InvalidState(
+                "Air density must be positive".to_string(),
+            ));
+        }
+        Ok(Self {
+            curves,
+            port_inlet,
+            port_outlet,
+            air_density_kg_per_m3: air_density,
+            speed_ratio: 1.0,
+            circuit_id: CircuitId::default(),
+            operational_state: OperationalState::default(),
+            _state: PhantomData,
+        })
+    }
+
     /// Returns the inlet port.
     pub fn port_inlet(&self) -> &Port<Connected> {
         &self.port_inlet
@@ -528,6 +552,17 @@ impl Component for Fan<Connected> {
             }
         }
     }
+
+    fn signature(&self) -> String {
+        format!("Fan(circuit={})", self.circuit_id.0)
+    }
+
+    fn to_params(&self) -> crate::ComponentParams {
+        crate::ComponentParams::new("Fan")
+            .with_param("circuitId", self.circuit_id.0)
+            .with_param("airDensityKgPerM3", self.air_density_kg_per_m3)
+            .with_param("speedRatio", self.speed_ratio)
+    }
 }
 
 impl StateManageable for Fan<Connected> {