Edit JSON node settings in a dialog from a one-line preview

A free setting typed json and a declared object or array setting (a Switch
node's rules, HTTP headers) show one line of their value; clicking opens a
Monaco JSON editor in a dialog that saves only once the text parses.
Declared object settings were not shown at all before. Escape in a dialog
opened from a side panel no longer closes the panel too.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013GAeg4Jo6xjZzjwy9QDWMQ

docs/interface/flow-editor.md

@@ -57,7 +57,10 @@ renamed.
 **Settings** is generated from the node type's parameter schema, so an MQTT
 node shows broker, topic and QoS, and an ntfy node shows server, topic and
 priority. A field marked as a credential renders as a picker over your stored
-[secrets](operations.md) instead of a text box.
+[secrets](operations.md) instead of a text box. A setting holding JSON, such as
+a Switch node's rules, shows one line of it; click it to edit the whole value
+in a larger editor, which saves only once the text parses. Escape or Cancel
+leaves the setting as it was.
 
 A Function node gets a second settings section where you add your own: a
 setting is a constant of this node's code and arrives as an argument beside its