Backend messages and field descriptions that reach the UI lose their em-dashes

Per the Microcopy rule: size and duration errors, the flavor errors, run
parameter errors, the Resources field descriptions, 401/409/400 details,
secret errors, the websocket node description and its on_connect setting.
The generated client follows.

backend/fluksio/flow/controller.py

@@ -358,7 +358,7 @@ NODE_TYPES: dict[str, NodeType] = {
     ),
     "websocket": NodeType(
         title="WebSocket",
-        description="Listen on a socket, or send to it — as a client or a server.",
+        description="Listen on a socket, or send to it, as a client or a server.",
         cls=WebSocketNode,
         params_schema=_schema_of(WebSocketNode),
     ),
@@ -2133,8 +2133,8 @@ def _collect_issues(
         ValidationIssue(
             code="unauthenticated_hook",
             message=(
-                f"Hook '{entry.node.local_id}' has no secret — "
-                "anyone who knows its URL can reach it."
+                f"Hook '{entry.node.local_id}' has no secret. "
+                "Anyone who knows its URL can reach it."
             ),
             flow=entry.flow,
             node=entry.id,