Snapshot WIP: solver HP epic progress, BPHX/HX physics, BMAD skill refresh.

Capture uncommitted solver robustness work (regularization, domain errors, linear solver lifecycle, tube DP/MSH), web workbench updates, and synced BMAD skills across IDE agent folders before starting BPHX pressure-drop.

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

crates/solver/src/system.rs

@@ -772,11 +772,7 @@ impl System {
                 tracing::debug!("{}", report.summary());
             }
             SystemDofBalance::UnderConstrained { free_dofs } => {
-                tracing::warn!(
-                    free_dofs,
-                    "{}",
-                    report.summary()
-                );
+                tracing::warn!(free_dofs, "{}", report.summary());
             }
             SystemDofBalance::OverConstrained { excess_equations } => {
                 tracing::error!(excess_equations, "{}", report.summary());
@@ -2339,9 +2335,7 @@ impl System {
             }
         }
         for id in self.inverse_control.linked_controls() {
-            unknowns.push(UnknownKind::InverseControl {
-                id: id.to_string(),
-            });
+            unknowns.push(UnknownKind::InverseControl { id: id.to_string() });
         }
         for index in 0..self.coupling_residual_count() {
             unknowns.push(UnknownKind::CouplingHeat { index });
@@ -2351,9 +2345,7 @@ impl System {
             unknowns.push(UnknownKind::SaturatedIntegrator { index });
         }
         for id in &self.free_actuators {
-            unknowns.push(UnknownKind::FreeActuator {
-                id: id.to_string(),
-            });
+            unknowns.push(UnknownKind::FreeActuator { id: id.to_string() });
         }
 
         if unknowns.len() != n_unknowns {