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>

dev-env.ps1

@@ -0,0 +1,64 @@
+param(
+    [string]$Test   = "",
+    [string]$Filter = ""
+)
+
+Write-Host ""
+Write-Host "=== Entropyk Dev Environment ===" -ForegroundColor Cyan
+
+$env:PATH += ";$env:USERPROFILE\.cargo\bin"
+$env:PATH += ";C:\Program Files\CMake\bin"
+
+$msvcBase = "C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.44.35207"
+$env:PATH += ";$msvcBase\bin\Hostx64\x64"
+
+$sdkVersion = "10.0.26100.0"
+$sdkBase = "C:\Program Files (x86)\Windows Kits\10"
+$env:LIB     = "$msvcBase\lib\x64;$sdkBase\lib\$sdkVersion\um\x64;$sdkBase\lib\$sdkVersion\ucrt\x64"
+$env:INCLUDE = "$msvcBase\include;$sdkBase\Include\$sdkVersion\ucrt;$sdkBase\Include\$sdkVersion\um"
+$env:PATH   += ";$sdkBase\bin\$sdkVersion\x64"
+
+Set-Location "C:\Users\serameza\impact\dev\Entropyk-main\entropyk"
+
+$cargoOk = Get-Command cargo -ErrorAction SilentlyContinue
+if ($cargoOk) {
+    $ver = cargo --version 2>&1
+    Write-Host "OK Cargo : $ver" -ForegroundColor Green
+} else {
+    Write-Host "ERREUR: Cargo introuvable" -ForegroundColor Red
+    return
+}
+
+$linkOk = Get-Command link.exe -ErrorAction SilentlyContinue
+if ($linkOk) {
+    Write-Host "OK Linker: link.exe trouve" -ForegroundColor Green
+} else {
+    Write-Host "ERREUR: link.exe introuvable" -ForegroundColor Red
+}
+
+Write-Host ""
+Write-Host "Repertoire: $(Get-Location)" -ForegroundColor Yellow
+Write-Host ""
+Write-Host "--- Commandes ---" -ForegroundColor Cyan
+Write-Host "  cargo test --package entropyk-core"
+Write-Host "  cargo test --package entropyk-fluids"
+Write-Host "  cargo test --package entropyk-components"
+Write-Host "  cargo test --package entropyk-solver"
+Write-Host "  cargo test --package entropyk-vendors"
+Write-Host "  cargo test --package entropyk-cli"
+Write-Host "  cargo test --package entropyk-fluids -- --nocapture"
+Write-Host ""
+Write-Host "--- Via ce script ---" -ForegroundColor Cyan
+Write-Host "  . .\dev-env.ps1 -Test entropyk-fluids"
+Write-Host "  . .\dev-env.ps1 -Test entropyk-fluids -Filter test_water_density"
+Write-Host ""
+
+if ($Test -ne "") {
+    if ($Filter -ne "") {
+        Write-Host ">> cargo test --package $Test $Filter -- --nocapture" -ForegroundColor Magenta
+        cargo test --package $Test $Filter -- --nocapture
+    } else {
+        Write-Host ">> cargo test --package $Test -- --nocapture" -ForegroundColor Magenta
+        cargo test --package $Test -- --nocapture
+    }
+}