SaraSort: Flet GUI for configuring SaraSortd

Flowchart of inputs/outputs with editable arrows, service page (status,
controls, autostart, version, logs), config editor (form + raw), templates,
tools (warnings, filename tester, failed files) and settings with
SaraFem-compatible export/import. AppImage build and a SaraSuite manifest
in Packaging/.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

.gitignore

@@ -0,0 +1,7 @@
+.venv/
+__pycache__/
+*.pyc
+build/
+.flet/
+dist/
+*.AppImage