v1.14.0

Added

• README link to the documentation — README.md now links to the Read the Docs site.

Fixed

• docs/conf.py: the ## [Unreleased] section of CHANGELOG.md was dropped by the RST changelog generator except for its orphaned ### Added/### Changed/... subheadings, which were emitted without content and at an incorrect nesting level. [Unreleased] is now recognised like a dated release and included only when it has actual content.
• Application froze (hard hang, required killing the process) after renaming a couple of files in a row with the image viewer open — each rename made refresh_and_select() reload the full-size image synchronously on the GUI thread (ImageViewer.load_image → load_pixmap) while _start_worker() concurrently spawned _ThumbnailWorker background threads decoding thumbnails (load_qimage) for the same refreshed rows. Qt's QImageReader/image-format plugins are not safe to invoke concurrently from multiple threads, and decoding from the GUI thread at the same time as a worker thread deadlocked inside QImageReader.read(). Confirmed via a repro script that reliably hung the process, with faulthandler stack dumps (triggered by SIGABRT) pinpointing both the GUI thread and worker threads blocked in QImageReader.read() simultaneously. image_io.py's load_qimage() and load_pixmap() now serialize all Qt decodes behind a shared threading.Lock.
• FileListWidget.refresh_and_select() did not stop the pending _refresh_debounce timer before refreshing, unlike its sibling refresh methods, allowing a directory-watcher-triggered refresh to fire redundantly right after a rename's explicit refresh.
• pbpicat.svg — replaced the style="width: 100%; height: 100%;" attribute with explicit width="1024" height="1024", matching the convention used by icons in other applications.