engine: parameter schemas for every command

cmd/forms.rs describes each command's parameters: model definitions (sets,
materials with elasticity, plasticity, hyperelasticity, damage, thermal and fluid
options, sections, reference points, couplings, masses, springs, boundary
conditions, loads, fluid domains, steps including nonlinear and explicit),
meshers, solvers, deck export, files and results. Tests check that every command
has a form and that a form's defaults are accepted or refused only for the
required fields left empty.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo

crates/engine/src/cmd/contact.rs

@@ -43,7 +43,7 @@ pub const PAIR: CommandSpec = CommandSpec {
         r#""friction": {"static": 0.3, "kinetic": 0.2, "decay": 10} (Coulomb, μ = μk + (μs − μk) e^(−decay × slip rate); default frictionless), "penalty_scale": 1 (0 < scale ≤ 1: a factor on the stiffest penalty that leaves the time increment alone), "initial_penetration": "adjust" (move nodes that start inside onto the surface, strain-free, and report them) | "refuse" (refuse the analysis, naming the first)"#,
         r#"} — contact between two surfaces, each one's nodes kept out of the other's faces (explicit dynamics; fails if the name is taken)"#
     ),
-    form: None,
+    form: Some(super::forms::CONTACT_PAIR),
     kind: CommandKind::Model,
     run: |s: &mut Session, p: &Value| {
         let n = name(p)?;
@@ -61,7 +61,7 @@ pub const GENERAL: CommandSpec = CommandSpec {
         r#""friction": {"static": 0.3, "kinetic": 0.2, "decay": 10} (Coulomb, μ = μk + (μs − μk) e^(−decay × slip rate); default frictionless), "penalty_scale": 1 (0 < scale ≤ 1: a factor on the stiffest penalty that leaves the time increment alone), "initial_penetration": "adjust" (move nodes that start inside onto the surface, strain-free, and report them) | "refuse" (refuse the analysis, naming the first)"#,
         r#"} — single-surface contact of everything that may touch (explicit dynamics; fails if the name is taken)"#
     ),
-    form: None,
+    form: Some(super::forms::CONTACT_GENERAL),
     kind: CommandKind::Model,
     run: |s: &mut Session, p: &Value| {
         let n = name(p)?;
@@ -78,7 +78,7 @@ pub const EDIT: CommandSpec = CommandSpec {
     id: "interaction.contact.edit",
     label: "Edit Contact",
     params: r#"{"name": "impact", "surfaces": {"type": "pair", "main": "plate", "secondary": "ball"} | {"type": "general", "surface": "skin" (optional)}, "friction": {…}, "penalty_scale": 1, "initial_penetration": "adjust|refuse"} — replaces the contact of that name (the model's form; see interaction.contact.pair)"#,
-    form: None,
+    form: Some(super::forms::CONTACT_EDIT),
     kind: CommandKind::Model,
     run: |s: &mut Session, p: &Value| {
         let n = name(p)?;
@@ -94,7 +94,7 @@ pub const DELETE: CommandSpec = CommandSpec {
     id: "interaction.contact.delete",
     label: "Delete Contact",
     params: r#"{"name": "impact"}"#,
-    form: None,
+    form: Some(super::forms::CONTACT_DELETE),
     kind: CommandKind::Model,
     run: |s: &mut Session, p: &Value| {
         s.model.remove_contact(name(p)?)?;
@@ -109,7 +109,7 @@ pub const FIND: CommandSpec = CommandSpec {
         r#"{"tolerance": 0.1 (distance within which surfaces touch; default a tenth of the mean exterior face size), "create": false (true: add two face sets and a contact pair per touching pair of parts, named find-N-main, find-N-secondary and find-N), "#,
         r#""friction", "penalty_scale", "initial_penetration" (of the created pairs, as interaction.contact.pair)} — the parts of the mesh (solid elements connected through their nodes) whose exterior faces come within the tolerance of each other"#
     ),
-    form: None,
+    form: Some(super::forms::CONTACT_FIND),
     kind: CommandKind::Model,
     run: find,
 };