Add diagram workbench UI with Modelica DoF coaching and ISO glyphs.

Ship the Next.js cycle editor with CAD chrome, technical HX symbols, Fixed/Free boundary guidance, and secondary water/air pressure drop support in the solver stack.

Co-authored-by: Cursor <cursoragent@cursor.com>

crates/cli/tests/config_parsing.rs

@@ -11,7 +11,67 @@ fn test_parse_minimal_config() {
     let config = ScenarioConfig::from_json(json).unwrap();
     assert_eq!(config.fluid, "R134a");
     assert!(config.circuits.is_empty());
-    assert_eq!(config.solver.strategy, "fallback");
+    assert_eq!(config.solver.strategy, "newton");
+    assert!(config.controls.is_empty());
+}
+
+#[test]
+fn test_parse_saturated_control_loop() {
+    let json = r#"
+    {
+        "fluid": "R134a",
+        "controls": [
+            {
+                "type": "SaturatedController",
+                "id": "lwt_capacity",
+                "measure": { "component": "evap_0", "output": "capacity" },
+                "actuator": {
+                    "component": "screw_0", "factor": "f_m",
+                    "initial": 1.0, "min": 0.5, "max": 1.5
+                },
+                "target": 350000.0,
+                "gain": 0.01,
+                "band": 1.0,
+                "smooth_eps": 0.001
+            }
+        ]
+    }"#;
+    let config = ScenarioConfig::from_json(json).unwrap();
+    assert_eq!(config.controls.len(), 1);
+    let c = &config.controls[0];
+    assert_eq!(c.control_type, "SaturatedController");
+    assert_eq!(c.id, "lwt_capacity");
+    assert_eq!(c.measure.component, "evap_0");
+    assert_eq!(c.measure.output, "capacity");
+    assert_eq!(c.actuator.factor, "f_m");
+    assert_eq!(c.actuator.min, 0.5);
+    assert_eq!(c.actuator.max, 1.5);
+    assert_eq!(c.target, 350000.0);
+    assert_eq!(c.gain, 0.01);
+    assert_eq!(c.smooth_eps, Some(0.001));
+}
+
+#[test]
+fn test_control_defaults_apply() {
+    let json = r#"
+    {
+        "fluid": "R134a",
+        "controls": [
+            {
+                "id": "cap",
+                "measure": { "component": "evap", "output": "capacity" },
+                "actuator": { "component": "comp", "factor": "f_m", "min": 0.5, "max": 1.5 },
+                "target": 1000.0
+            }
+        ]
+    }"#;
+    let config = ScenarioConfig::from_json(json).unwrap();
+    let c = &config.controls[0];
+    assert_eq!(c.control_type, "SaturatedController");
+    assert_eq!(c.gain, 1.0);
+    assert_eq!(c.band, 1.0);
+    assert_eq!(c.actuator.initial, 1.0);
+    assert_eq!(c.smooth_eps, None);
 }
 
 #[test]
@@ -110,7 +170,7 @@ fn test_load_config_file_not_found() {
 #[test]
 fn test_solver_config_defaults() {
     let config = SolverConfig::default();
-    assert_eq!(config.strategy, "fallback");
+    assert_eq!(config.strategy, "newton");
     assert_eq!(config.max_iterations, 100);
     assert_eq!(config.tolerance, 1e-6);
     assert_eq!(config.timeout_ms, 0);