Fix get_views: include comodel field metadata for O2M/M2M inline views

The web client needs field metadata for sub-models when rendering
inline list views inside form views (e.g., sale.order.line inside
sale.order form). Now iterates all relational fields and adds their
comodel to the models dict in the get_views response.

Fixes "Cannot read properties of undefined (reading 'fields')" error
on sale.order and account.move stored form views with O2M tabs.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pkg/server/views.go

@@ -75,13 +75,32 @@ func handleGetViews(env *orm.Environment, model string, params CallKWParams) (in
 		}
 	}
 
-	// Build models dict with field metadata
+	// Build models dict with field metadata.
+	// Include the main model + all comodels referenced by relational fields.
+	// Mirrors: odoo/addons/web/models/models.py _get_view_fields()
 	models := map[string]interface{}{
 		model: map[string]interface{}{
 			"fields": fieldsGetForModel(model),
 		},
 	}
 
+	// Add comodels (needed for O2M/M2M inline views and M2O dropdowns)
+	m := orm.Registry.Get(model)
+	if m != nil {
+		for _, f := range m.Fields() {
+			if f.Comodel != "" {
+				if _, exists := models[f.Comodel]; !exists {
+					comodelFields := fieldsGetForModel(f.Comodel)
+					if len(comodelFields) > 0 {
+						models[f.Comodel] = map[string]interface{}{
+							"fields": comodelFields,
+						}
+					}
+				}
+			}
+		}
+	}
+
 	return map[string]interface{}{
 		"views":  views,
 		"models": models,