FlowForge v1.6.0

Fixed

• Node connections broken since v1.4.0 — dragging a connection wire from any connector was offset and unusable; caused by RotateTransform(45°) applied directly to the Nodify Connector control, which rotated Nodify's internal coordinate calculations; moved rotation into a custom ControlTemplate Border so the diamond shape is preserved without affecting drag math
• Atomic writes for image nodes — ImageConvertNode and ImageResizeNode now use temp-file-then-rename pattern, preventing data loss on I/O errors or cancellation (previously wrote directly to target/original path)
• Path traversal hardening — PathGuard now validates backup paths in FolderOutputNode; RenameRegexNode fullpath scope uses PathGuard instead of hand-rolled check; FolderInputNode filters out symlinked files outside source root; CLI validates --input/--output directories exist
• FilterNode thread safety — removed mutable _dryRun instance field; parameter is now passed directly to helper methods
• Semaphore disposal race — PipelineRunner now fully drains in-flight tasks before disposing the semaphore
• Buffered transform double-counting — SortNode jobs were counted as both Skipped and Failed when flush failed; runner now skips early disposition for IBufferedTransformNode
• ImageResizeNode missing ErrorMessage — file-too-large failure now sets job.ErrorMessage (was null in UI)
• FilterNode inconsistent date defaults — missing-file paths now return DateTime.MinValue consistently (was string.Empty for live runs)
• SortNode stale buffer — buffer is cleared in Configure to prevent cancelled-run jobs bleeding into next run
• NodeLibrary theme refresh — brushes now update on theme toggle; search filter reapplied after refresh
• Runner log diagnostics — failure log messages now include job.ErrorMessage

Changed

• Full codebase audit — 2-round review across 6 dimensions (security, leaks, performance, architecture, bugs, coverage) with 45+ issues resolved
• Performance — MetadataExtractNode reads EXIF once per file (was once per key); FilterNode uses single FileInfo per file; SortByKey uses index-based sorting; HashSet for SupportedFormats and InvalidFileNameChars lookups; static ValidFormats in ImageConvertNode
• RecentPipelines validation — AppSettings.Validate() now filters entries with null bytes, excessive length, relative paths, or whitespace
• 342 tests — 20 new tests for FilterNode operators, date fields, RenamePattern conflict resolution, SortNode date sorting, RenameRegex fullpath I/O, null deserialization, RecentPipelines validation; cross-platform temp paths replacing hardcoded /tmp/; removed 2 redundant tests; strengthened assertions on FolderOutput content and SortNode ordering
• CommunityToolkit.Mvvm 8.4.1 → 8.4.2

See CHANGELOG.md for full history.