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/solver/tests/picard_sequential.rs

@@ -321,7 +321,13 @@ fn test_error_display_invalid_system() {
 fn test_converged_state_is_converged() {
     use entropyk_solver::{ConvergedState, ConvergenceStatus};
 
-    let state = ConvergedState::new(vec![1.0, 2.0, 3.0], 25, 1e-7, ConvergenceStatus::Converged, entropyk_solver::SimulationMetadata::new("".to_string()));
+    let state = ConvergedState::new(
+        vec![1.0, 2.0, 3.0],
+        25,
+        1e-7,
+        ConvergenceStatus::Converged,
+        entropyk_solver::SimulationMetadata::new("".to_string()),
+    );
 
     assert!(state.is_converged());
     assert_eq!(state.iterations, 25);