Fix NPE from external completion providers triggered on AI query pane

[Copilot]

When typing in the Agent mode query pane, jeddict-ai's own completion providers (AIQueryCompletionProvider, JeddictQueryCompletionProvider) registered for text/x-java would trigger the NetBeans completion framework — which then invoked all text/x-java providers, including the external MicronautDataCompletionProvider. That provider calls CompilationController.get(result) expecting a real Java source backing, gets null (the query pane has none), and throws NullPointerException.

Changes

• AssistantChat.java: Use text/plain for the questionPane editor kit instead of text/x-java. The input pane is free-form text; it has no Java source backing and doesn't need Java-specific providers.
• AIQueryCompletionProvider: Changed @MimeRegistration from text/x-java → text/plain to stay registered on the query pane.
• JeddictQueryCompletionProvider: Changed @MimeRegistration from text/x-java → text/plain, and added a guard in getAutoQueryTypes() so it only triggers auto-completion on editors with JEDDICT_EDITOR_CALLBACK set — preventing it from firing on every plain-text file in the IDE.

// Before: exposes the query pane to all text/x-java completion providers
questionPane.setEditorKit(createEditorKit("text/x-" + (type == null ? "java" : type)));

// After: isolated to text/plain; no external Java providers invoked
questionPane.setEditorKit(createEditorKit(MIME_PLAIN_TEXT));

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:

• openrouter.ai
  • Triggering command: /usr/lib/jvm/temurin-17-jdk-amd64/bin/java /usr/lib/jvm/temurin-17-jdk-amd64/bin/java -javaagent:/home/REDACTED/.m2/repository/org/jacoco/org.jacoco.agent/0.8.12/org.jacoco.agent-0.8.12-runtime.jar=destfile=/home/REDACTED/work/jeddict-ai/jeddict-ai/target/jacoco.exec --add-opens=java.base/java.net=ALL-UNNAMED --add-opens=java.desktop/sun.awt=ALL-UNNAMED --add-opens=java.desktop/sun.awt.X11=ALL-UNNAMED --add-opens=java.desktop/java.awt=ALL-UNNAMED --add-opens=java.base/java.lang.reflect=ALL-UNNAMED --add-opens=java.base/java.lang=ALL-UNNAMED --add-opens=java.base/java.util=ALL-UNNAMED --add-opens=java.desktop/sun.java2d=ALL-UNNAMED --add-exports=java.desktop/sun.java2d=ALL-UNNAMED --add-exports=java.desktop/sun.awt.image=ALL-UNNAMED --add-exports=java.desktop/java.awt.peer=ALL-UNNAMED --add-exports=java.desktop/sun.awt.event=ALL-UNNAMED --add-exports=java.base/sun.security.action=ALL-UNNAMED -jar /home/REDACTED/work/jeddict-ai/jeddict-ai/target/surefire/surefirebooter-20260317154432012_378.jar /home/REDACTED/work/jeddict-ai/jeddict-ai/target/surefire 2026-03-17T15-44-31_067-jvmRun1 surefire-20260317154432012_376tmp (dns block)
• www.netbeans.org
  • Triggering command: /opt/hostedtoolcache/CodeQL/2.24.3/x64/codeql/tools/linux64/java/bin/java /opt/hostedtoolcache/CodeQL/2.24.3/x64/codeql/tools/linux64/java/bin/java -jar /opt/hostedtoolcache/CodeQL/2.24.3/x64/codeql/xml/tools/xml-extractor.jar --fileList=/tmp/codeql-scratch-cd61c9847ee61009/dbs/java/working/files-to-index12149872662966825360.list --sourceArchiveDir=/tmp/codeql-scratch-cd61c9847ee61009/dbs/java/src --outputDir=/tmp/codeql-scratch-cd61c9847ee61009/dbs/java/trap/java k/jeddict-ai/jeddict-ai/src/main/java/io/github/jeddict/ai/util/FileUtil.java k/_temp/ghcca-node/node/bin/grep implements nse/ToolExecutio17.0.18+8 (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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