Fix errors type and maintain error messsage

Fixes https://github.com/galaxyproject/galaxy/issues/18874

client/src/api/schema/schema.ts

@@ -14020,9 +14020,11 @@ export interface components {
              * Errors
              * @description Errors associated with the invocation.
              */
-            errors?: {
-                [key: string]: unknown;
-            } | null;
+            errors?:
+                | {
+                      [key: string]: unknown;
+                  }[]
+                | null;
             /**
              * Galaxy Version
              * @description The version of Galaxy this object was generated with.

lib/galaxy/managers/markdown_util.py

@@ -418,7 +418,7 @@ class GalaxyInternalMarkdownDirectiveHandler(metaclass=abc.ABCMeta):
 
 class ReadyForExportMarkdownDirectiveHandler(GalaxyInternalMarkdownDirectiveHandler):
     def __init__(self, trans, extra_rendering_data=None):
-        extra_rendering_data = extra_rendering_data or {}
+        extra_rendering_data = extra_rendering_data if extra_rendering_data is not None else {}
         self.trans = trans
         self.extra_rendering_data = extra_rendering_data
 

lib/galaxy/schema/invocation.py

@@ -470,7 +470,7 @@ class InvocationReport(Model, WithModelClass):
     generate_time: Optional[str] = schema.GenerateTimeField
     generate_version: Optional[str] = schema.GenerateVersionField
 
-    errors: Optional[Dict[str, Any]] = Field(
+    errors: Optional[List[Dict[str, Any]]] = Field(
         default=None,
         title="Errors",
         description="Errors associated with the invocation.",