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>

apps/web/public/docs/components/screw-economizer-compressor.md

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+# ScrewEconomizerCompressor / ScrewCompressor
+
+Config types: `"ScrewEconomizerCompressor"`, `"ScrewCompressor"`  
+Source: `crates/components/src/screw_economizer_compressor.rs`  
+Polynomials: `Polynomial2D` bilinear SST/SDT
+
+---
+
+## EN
+
+### Purpose
+
+Twin-screw compressor with **economizer injection** port. Manufacturer performance as **bi-quadratic (bilinear) maps** of SST and SDT.
+
+### Performance maps
+
+```
+ṁ_suction = z_flow · (a00 + a10·SST + a01·SDT + a11·SST·SDT)
+Ẇ_shaft   = z_power · (b00 + b10·SST + b01·SDT + b11·SST·SDT)
+ṁ_eco     ≈ eco_fraction · ṁ_suction   (or eco poly)
+```
+
+JSON coefficient names (CLI):
+
+| Mass flow | Power |
+|-----------|-------|
+| `mf_a00`, `mf_a10`, `mf_a01`, `mf_a11` | `pw_b00`, `pw_b10`, `pw_b01`, `pw_b11` |
+
+### Built-in presets
+
+| `preset` | Meaning |
+|----------|---------|
+| `bitzer_generic_200kw` | Bitzer-like ~200 kW R134a map |
+| `grasso_generic_200kw` | Grasso-like ~200 kW map |
+| (empty) | generic defaults |
+
+Explicit `mf_*` / `pw_*` **override** preset values.
+
+### Ports
+
+| Port | Role |
+|------|------|
+| `suction` / `inlet` | main suction |
+| `discharge` / `outlet` | discharge |
+| `economizer` / `eco` | intermediate injection |
+
+### Other parameters
+
+| Key | Meaning | Default |
+|-----|---------|---------|
+| `frequency_hz` | drive frequency | 50 |
+| `nominal_frequency_hz` | rated f | 50 |
+| `mechanical_efficiency` | η_mech | 0.92 |
+| `economizer_fraction` | eco flow share | from preset |
+
+### Calibration Z
+
+| Factor | Default |
+|--------|---------|
+| `z_flow` | **1.0** |
+| `z_flow_eco` | **1.0** |
+| `z_power` | **1.0** |
+| `z_etav` | 1.0 |
+
+### UI
+
+- Tab **General**: frequency, efficiency, preset  
+- Tab **Map (polynomials)**: mf_a** / pw_b** with defaults filled from preset  
+- Help documents the bilinear formula  
+
+---
+
+## FR
+
+### But
+
+Compresseur **à vis** 3 ports + injection économiseur.
+
+### Carte
+
+Polynôme **bilinéaire** SST/SDT pour ṁ et puissance. Presets Bitzer / Grasso.
+
+### Coeffs JSON
+
+`mf_a00…a11` (débit), `pw_b00…b11` (puissance).
+
+### Calibration
+
+Z = **1** par défaut.
+
+### Ports
+
+Aspiration, refoulement, économiseur.