Read shared SaraSuite settings; single menu category

README.md

@@ -30,6 +30,23 @@ GitHost = "https://git.srhtnin.garden/sarah"
 
 The only thing a program needs from the system is `python3` (for its venv).
 
+## Shared settings
+
+Settings every SaraSuite program shares live in `~/.config/SaraSuite/Config.toml`:
+
+```toml
+Theme = "CatppuccinMocha"        # a file in ~/.config/SaraSuite/Themes/
+FontFamily = "Fixedsys Excelsior" # the bundled font, or any installed font family
+HideWindowTitleBar = false
+```
+
+Each program's own `~/.config/SaraSuite/<Program>/Config.toml` has the same three keys plus
+`UseSharedSettings` (default `true`). With it on, the program reads the shared file; with it
+off, it uses its own values instead. SaraFem edits both in its Settings (the SaraSuite tab
+for the shared file, the General tab for its own); for SaraSuite itself, edit its
+`Config.toml` directly. Whichever program starts first creates the shared file from its own
+values.
+
 ## Running and building
 
 - AppImage: `Packaging/BuildAppImage.sh` builds `dist/SaraSuite-x86_64.AppImage`