Ajusta plugins para Java 17 e alinha pré-requisitos de JDK.

Permite compilar chat e screencast com JDK 21+ na sala; documentação e check do script citam Java 17 como mínimo.

Co-authored-by: Cursor <cursoragent@cursor.com>

plugins/screencast/.idea/misc.xml

@@ -1,3 +1,3 @@
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_25" project-jdk-name="openjdk-26" project-jdk-type="JavaSDK" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" project-jdk-name="openjdk-26" project-jdk-type="JavaSDK" />
 </project>

plugins/screencast/nbproject/project.properties

@@ -45,8 +45,8 @@ javac.modulepath=
 javac.processormodulepath=
 javac.processorpath=\
     ${javac.classpath}
-javac.source=25
-javac.target=25
+javac.source=17
+javac.target=17
 javac.test.classpath=\
     ${javac.classpath}:\
     ${build.classes.dir}