Look like SaraFem and SaraSuite: no custom title bar

The window keeps its own title bar (or none, per HideWindowTitleBar), with
SaraSuite's header (name, Add to app menu for AppImages, gear). Settings
is now a dialog laid out like SaraFem's, with export/import on the
SaraSuite tab, and notifications use SaraFem's tinted toast style.

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

README.md

@@ -26,8 +26,11 @@ Needs SaraSortd **7.1** or newer for arrows with their own patterns (per-entry `
 - **Tools**: warnings about the setup (Unset values, version mismatches, outputs nothing reaches, inputs
   without outputs, entries shadowed by a catch-all), a filename tester that shows where a file would go
   and why, and the files in FailedDir with a retry button.
-- **Settings**: the shared SaraSuite appearance, SaraSort's own settings, where SaraSortd lives, and
-  export/import in the same file format as SaraFem's (`[SaraSuite]` plus `[SaraSort]`).
+
+The gear button opens **Settings**, laid out like SaraFem's and SaraSuite's: the shared SaraSuite
+appearance and export/import (same file format as SaraFem's, `[SaraSuite]` plus `[SaraSort]`), SaraSort's
+own settings, and where SaraSortd lives. Run as an AppImage, the header also has an "Add to app menu"
+button, like SaraSuite's.
 
 After a change to `GlobalConf.toml` (new inputs or outputs) SaraSort restarts SaraSortd, since SaraSortd
 only reads that file when it starts. That can be turned off in Settings.
@@ -60,5 +63,6 @@ only reads that file when it starts. That can be turned off in Settings.
 | `Sortd.py` | SaraSortd's configs: the graph, edits, the filename simulator, warnings |
 | `Service.py` | systemctl and journalctl |
 | `Templates.py` | built-in and your own templates |
+| `Settings.py` | the Settings dialog |
 | `Widgets.py` | the shared App context and small controls |
 | `*Page.py` | one per page |