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/components/src/compressor.rs

@@ -733,7 +733,7 @@ impl Compressor<Connected> {
                 self.port_suction.enthalpy(),
             )
             .map_err(|e| {
-                ComponentError::CalculationFailed(format!("Failed to compute suction state: {}", e))
+                ComponentError::from_fluid_error_context("Failed to compute suction state", e)
             })
     }
 
@@ -749,10 +749,7 @@ impl Compressor<Connected> {
                 self.port_discharge.enthalpy(),
             )
             .map_err(|e| {
-                ComponentError::CalculationFailed(format!(
-                    "Failed to compute discharge state: {}",
-                    e
-                ))
+                ComponentError::from_fluid_error_context("Failed to compute discharge state", e)
             })
     }
 
@@ -2227,7 +2224,7 @@ mod tests {
         assert!(result.is_ok(), "jacobian error: {:?}", result);
 
         // Should have at least some entries
-        assert!(jacobian.len() > 0);
+        assert!(!jacobian.is_empty());
     }
 
     #[test]