Fix null→false, stock seed data, action_get on model, FK order

- Normalize null DB values to false (Odoo convention) in web_search_read
  and web_read responses
- Seed stock reference data: 6 locations, 1 warehouse, 3 picking types
- Fix FK order: warehouse must be created before picking types
- Move action_get from hardcoded dispatcher to res.users RegisterMethod
- Add action_res_users_my (ID 103) to seedActions
- Remove hardcoded action_get case from dispatchORM

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

pkg/server/web_methods.go

@@ -89,6 +89,9 @@ func handleWebSearchRead(env *orm.Environment, model string, params CallKWParams
 	// Format date/datetime fields to Odoo's expected string format
 	formatDateFields(model, records)
 
+	// Convert SQL NULLs to Odoo-expected defaults (false, 0, etc.)
+	normalizeNullFields(model, records)
+
 	if records == nil {
 		records = []orm.Values{}
 	}
@@ -133,6 +136,9 @@ func handleWebRead(env *orm.Environment, model string, params CallKWParams) (int
 	// Format date/datetime fields to Odoo's expected string format
 	formatDateFields(model, records)
 
+	// Convert SQL NULLs to Odoo-expected defaults (false, 0, etc.)
+	normalizeNullFields(model, records)
+
 	if records == nil {
 		records = []orm.Values{}
 	}
@@ -203,6 +209,42 @@ func formatM2OFields(env *orm.Environment, modelName string, records []orm.Value
 	}
 }
 
+// normalizeNullFields converts SQL NULL (Go nil) values to Odoo-expected defaults.
+// In Python Odoo, empty fields return False (JSON false), not null.
+// Without this, the webclient may render "null" as literal text.
+// Mirrors: odoo/orm/fields.py convert_to_read() behaviour
+func normalizeNullFields(model string, records []orm.Values) {
+	m := orm.Registry.Get(model)
+	if m == nil {
+		return
+	}
+	for _, rec := range records {
+		for fieldName, val := range rec {
+			if val != nil {
+				continue
+			}
+			f := m.GetField(fieldName)
+			if f == nil {
+				continue
+			}
+			switch f.Type {
+			case orm.TypeChar, orm.TypeText, orm.TypeHTML, orm.TypeSelection:
+				rec[fieldName] = false
+			case orm.TypeMany2one:
+				rec[fieldName] = false
+			case orm.TypeInteger, orm.TypeFloat, orm.TypeMonetary:
+				rec[fieldName] = false
+			case orm.TypeBoolean:
+				rec[fieldName] = false
+			case orm.TypeDate, orm.TypeDatetime:
+				rec[fieldName] = false
+			default:
+				rec[fieldName] = false
+			}
+		}
+	}
+}
+
 // formatDateFields converts date/datetime values to Odoo's expected string format.
 func formatDateFields(model string, records []orm.Values) {
 	m := orm.Registry.Get(model)