Changelog update - 261.19017.1

[lukaszlenart]

Current pull request contains patched CHANGELOG.md file for the 261.19017.1 version.

This PR was created manually because the automated step in release.yml was skipped after the Upload Release Asset step failed (see #80 for the workflow fix).

Changes included in this release

Added

• Add read-only Diagram tab for struts.xml files with lightweight config visualization (packages, actions, results)

Changed

• Disable the deprecated Graph editor tab by default; opt in with JVM property -Dcom.intellij.struts2.enableGraphEditor=true
• Update platformVersion to 2026.1
• Change since/until build to 261-261.* (2026.1 only)
• Dependencies - upgrade org.jetbrains.intellij.platform to 2.13.1
• Dependencies - upgrade Gradle to 9.0.0 (required by IntelliJ Platform Gradle Plugin 2.13.1)
• Convert pre-release publishing from per-push to nightly schedule
• Add two-phase release workflow with prepare and publish steps
• Merge PR artifact comment into build workflow
• Enable automerge of PRs
• Clean up README by removing template boilerplate

Fixed

• Replace deprecated ReadAction.compute(ThrowableComputable) with ReadAction.nonBlocking().executeSynchronously() (4 call sites)
• Replace deprecated DaemonCodeAnalyzer.restart(PsiFile) with restart(PsiFile, reason) overload
• Remove deprecated CompletionType.CLASS_NAME registration (covered by CompletionType.BASIC)
• Fix private and deprecated API usages for JetBrains Marketplace approval:
  • Replace IconManager.loadRasterizedIcon() with IconLoader.getIcon() in icon classes
  • Replace WebFacet.getWebRoots(boolean) with getWebRoots() (parameter scheduled for removal)
  • Replace AnActionButton with DumbAwareAction in toolbar decorator
  • Replace IdeFocusManager.doWhenFocusSettlesDown() with direct requestFocus()
  • Replace ResourceRegistrar.addStdResource(Class) with ClassLoader-based version
  • Replace FilenameIndex.getFilesByName() with getVirtualFilesByName()
  • Replace deprecated URL(String) constructor with URI.create().toURL()
• Resolve deprecated API warnings from Marketplace verification:
  • Migrate DaemonCodeAnalyzer.restart() to restart(PsiFile) overload
  • Suppress unavoidable deprecations with no public replacements (GraphBuilder, CheckboxTreeBase)
  • Migrate FacetConfiguration.readExternal()/writeExternal() to PersistentStateComponent<Element>
• Strip leading slash from DTD resource path for IntelliJ 2025.3 PluginClassLoader.findResource() compatibility
• Resolve 21 critical nullability/NPE warnings from Qodana analysis across 15 files
• Resolve 22 Qodana warnings: redundant code, incorrect string capitalization, unnecessary null checks
• Migrate Struts2GraphComponent from DataProvider to UiDataProvider
• Exclude src/main/gen from Qodana scanning to suppress generated code warnings
• Fix nightly CI version collision: read branch prefix from pluginVersion and increment nightly counter from latest pre-release tag
• Fix nightly CI workflow to only target nightly pre-releases, avoiding interference with release candidates
• Fix nightly CI to exclude pre-releases when resolving latest build number

[github-actions]

🔌 Plugin artifact ready for testing!

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Artifact: struts2-261.19017.1