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/anchor-heat-source.md

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+# Anchor & HeatSource (inline BOLT-style nodes)
+
+Config types: `"Anchor"` / `"RefrigerantNode"`, `"HeatSource"`  
+Source: anchor / heat source modules in components
+
+---
+
+## EN
+
+### Anchor (Refrigerant.Node)
+
+Inline **probe or spec** on a refrigerant edge:
+
+| Mode | Behaviour | DoF |
+|------|-----------|-----|
+| Probe (no key) | measures P/T/SH/SC — **DoF-neutral** | 0 equations |
+| Spec | imposes **one** of `superheat_k`, `quality`, `t_c`/`t_k`, `p_bar` | **+1 equation** |
+
+When imposing, free something elsewhere (emergent pressure, free actuator, free boundary).
+
+### HeatSource (Heat.Source)
+
+Injects `q_w` (or `q_kw`) into the stream energy balance:
+
+```
+ṁ · (h_out − h_in) = Q_heat
+```
+
+Negative Q extracts heat. Can be linked as `cold_component` of a thermal coupling (motor cooling pattern).
+
+### Ports
+
+Inline on a single branch (inlet/outlet pass-through).
+
+### Calibration
+
+None required for probe mode.
+
+### JSON (main)
+
+| Key | Component | Meaning |
+|-----|-----------|---------|
+| `superheat_k` / `quality` / `t_c` / `p_bar` | Anchor | one optional FIX |
+| `q_w` / `q_kw` | HeatSource | heat injection |
+
+---
+
+## FR
+
+### Anchor
+
+Sonde (0 DoF) ou **une** spécification (+1 équation) : SH, x, T ou P.
+
+### HeatSource
+
+Injection de chaleur `Q` dans le bilan d’énergie du fluide.
+
+### DoF
+
+Imposer une spec Anchor ⇒ libérer ailleurs.