fix: fix script persistence in url + add support for extra error args in python

backend/windmill-worker/src/python_executor.rs

@@ -498,7 +498,10 @@ except BaseException as e:
     exc_type, exc_value, exc_traceback = sys.exc_info()
     tb = traceback.format_tb(exc_traceback)
     with open(result_json, 'w') as f:
-        err = {{ "message": str(e), "name": e.__class__.__name__, "stack": '\n'.join(tb[1:])  }}
+        err = {{ "message": str(e), "name": e.__class__.__name__, "stack": '\n'.join(tb[1:]) }}
+        extra = e.__dict__ 
+        if extra and len(extra) > 0:
+            err['extra'] = extra
         flow_node_id = os.environ.get('WM_FLOW_STEP_ID')
         if flow_node_id:
             err['step_id'] = flow_node_id

frontend/src/lib/components/DisplayResult.svelte

@@ -559,6 +559,11 @@
 						<pre class="text-xs pt-2 whitespace-pre-wrap text-primary"
 							>{result.error.stack ?? ''}</pre
 						>
+						{#if result.error?.extra}
+							<pre class="text-xs pt-2 whitespace-pre-wrap text-primary"
+								>{JSON.stringify(result.error.extra, null, 4)}</pre
+							>
+						{/if}
 						<slot />
 					</div>
 					{#if language === 'bun'}

frontend/src/lib/components/ScriptBuilder.svelte

@@ -197,7 +197,7 @@
 	}
 
 	$: !disableHistoryChange &&
-		replaceStateFn('#' + encodeState({ script, primarySchedule: $primaryScheduleStore }))
+		replaceStateFn('#' + encodeState({ ...script, primarySchedule: $primaryScheduleStore }))
 
 	if (script.content == '') {
 		initContent(script.language, script.kind, template)

frontend/src/routes/(root)/(logged)/scripts/add/+page.svelte

@@ -39,7 +39,7 @@
 			return decoded
 		} catch (e) {
 			console.error('Error decoding state', e)
-			return defaultScript
+			return defaultScript()
 		}
 	}