- Updated Gradle version in `.env`, Dockerfiles, and wrapper to 9.3.1.
- Replaced alias-based application of `kotlinMultiplatform` plugin with direct `id` usage in subprojects to resolve "Plugin loaded multiple times" error.
- Applied centralized plugin management and Gradle daemon optimizations to improve Docker build stability and address KMP classloading issues.
Deleted `.fleet/receipt.json`, `.vscode/settings.json`, and unused `CLASSPATH` references from Gradle scripts. Updated JVM toolchain configuration from Java 25 to Java 24 in `build.gradle.kts` for consistency.