improve default connection for failure module

frontend/src/lib/components/TemplateEditor.svelte

@@ -382,6 +382,10 @@
 	export let fixedOverflowWidgets = true
 	export let fontSize = 16
 
+	if (typeof code != 'string') {
+		code = ''
+	}
+
 	const lang = 'template'
 	const dispatch = createEventDispatcher()
 

frontend/src/lib/components/flows/utils.ts

@@ -92,7 +92,7 @@ export async function loadSchemaFromModule(module: FlowModule): Promise<{
 
 		if (JSON.stringify(keys.sort()) !== JSON.stringify(Object.keys(input_transforms).sort())) {
 			input_transforms = keys.reduce((accu, key) => {
-				let nv = input_transforms[key] ?? {
+				let nv = input_transforms[key] ?? (module.id == 'failure' && ['message', 'name'].includes(key)) ? { type: 'javascript', expr: `error.${key}` } : {
 					type: 'static',
 					value: undefined
 				}

frontend/src/lib/script_helpers.ts

@@ -102,7 +102,7 @@ export async function main(x: string) {
 }
 `
 
-export const DENO_FAILURE_MODULE_CODE = `
+export const DENO_FAILURE_MODULE_CODE = `// flow is considered recovered and a success unless an exception is thrown
 
 export async function main(message: string, name: string) {
   const flow_id = Deno.env.get("WM_FLOW_JOB_ID")
@@ -119,8 +119,7 @@ def main(x: str):
 `
 
 export const PYTHON_FAILURE_MODULE_CODE = `import os
-
-# connect the error parameter to 'previous_result.error'
+# flow is considered recovered and a success unless an exception is raised
 
 def main(message: str, name: str):
   flow_id = os.environ.get("WM_FLOW_JOB_ID")