Add editable "Add to group" combobox to import entries dialog

[Copilot]

The import entries dialog had no way to assign imported entries to a group at import time. This adds an editable combobox that lists existing groups and also accepts a new group name to create an explicit group on the fly.

Changes

• ImportEntriesDialog.fxml: Added Add to group label and set group combobox to editable="true"
• ImportEntriesDialog.java:
  • Set up StringConverter<GroupTreeNode> on the group combobox to support both selection and text input
  • Added findGroupByName(String) — shared lookup used by the converter and import logic
  • Added getOrCreateSelectedGroup() — resolves the target group at import time:
    • Returns empty if "All entries" (root) is selected or field is blank → no group assignment
    • Matches typed name to existing group if found
    • Otherwise creates a new ExplicitGroup(INDEPENDENT) under the root; initializes the group tree if the database has none
  • Replaced setResultConverter group logic to use getOrCreateSelectedGroup(); also fixed a latent NoSuchElementException by replacing .getFirst() with stream().findFirst() when restoring previous group selection
• JabRef_en.properties: Added Add to group localization key

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• api.foojay.io
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-opens=java.base/java.nio.charset=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED --add-opens=java.base/java.time=ALL-UNNAMED -Xmx6g -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant (dns block)
• central.sonatype.com
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.lang.invoke=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED --add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.prefs/java.util.prefs=ALL-UNNAMED --add-opens=java.base/java.nio.charset=ALL-UNNAMED --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.base/java.util.concurrent=ALL-UNNAMED --add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED --add-opens=java.xml/javax.xml.namespace=ALL-UNNAMED --add-opens=java.base/java.time=ALL-UNNAMED -Xmx6g -Dfile.encoding=UTF-8 -Duser.country -Duser.language=en -Duser.variant (dns block)
• files.jabref.org
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java -Xmx64m -Xms64m -Dorg.gradle.appname=gradlew -jar /home/REDACTED/work/jabref/jabref/gradle/wrapper/gradle-wrapper.jar :jabgui:compileJava _TOKEN"; }; f (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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