(EPROC-22810) PROC Administration - System Information Processes endpoint refinement

[kwas-oc]

https://opuscapita.atlassian.net/browse/EPROC-22810

[Copilot]

Pull request overview

This PR refines the Process Administration UI interactions by switching several node/variable/assignee operations to AJAX-style fetch calls and changing corresponding controller actions to return JSON success responses.

Changes:

• Added a shared UI error container and a new i18n message for generic server communication failures.
• Refactored variable/node ordering and delete operations to use fetch + JSON responses (and introduced common delete handling in the nodes list).
• Updated multiple controller actions to enforce HTTP methods and return JSON {success: ...} payloads instead of redirects.

Reviewed changes

Copilot reviewed 11 out of 11 changed files in this pull request and generated 19 comments.

Show a summary per file

File	Description
grails-app/views/processNodeDef/nodeForm.gsp	Adds an error container intended for AJAX error display.
grails-app/views/processDef/editProcess.gsp	Adds an error container intended for AJAX error display.
grails-app/views/processDef/_variablesList.gsp	Moves variable reorder/delete to fetch and updates DOM identifiers/classes.
grails-app/views/processDef/_nodesList.gsp	Moves node reorder/delete + transition delete to fetch and adds shared delete helper.
grails-app/views/common/_assigneesEditor.gsp	Migrates assignee add/delete to fetch and centralizes request handling.
grails-app/i18n/common.properties	Adds plugin.grailsflow.internalError message.
grails-app/controllers/ProcessVarDefController.groovy	Adds allowedMethods + JSON responses for delete/reorder endpoints.
grails-app/controllers/ProcessTransitionDefController.groovy	Adds allowedMethods + JSON response endpoint for transition delete (renamed action).
grails-app/controllers/ProcessNodeDefController.groovy	Adds allowedMethods + JSON responses for delete/reorder/assignee delete endpoints.
application.properties	Bumps snapshot version with ticket suffix.
GrailsflowGrailsPlugin.groovy	Aligns plugin version with ticket-suffixed snapshot.

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[WojciechStrzelinski-oc]

don't use such deep if statements