Issue forms and needs-info: ask short bug reports for steps to reproduce (#2416)

* Triage bot: needs-info for short bug reports without steps

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TPWBBSRPfPYWgrrhbznewR

* Issue forms for bugs and feature requests; document needs-info

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TPWBBSRPfPYWgrrhbznewR

---------

Co-authored-by: jyviko <2501648+jyviko@users.noreply.github.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

.github/ISSUE_TEMPLATE/config.yml

@@ -1,3 +1,5 @@
+# Blank issues stay on: the app's Report an Issue opens issues/new?title=…&body=… with the report
+# filled in (crates/ui-egui/src/issue_report.rs), which GitHub drops when blank issues are off.
 blank_issues_enabled: true
 contact_links:
   - name: Questions and chat