Bundle libsecret for systems without it; first launch keeps Flet's message off the client path

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

Main.py

@@ -38,6 +38,23 @@ else:
 _MenuLabel = "Start menu" if IsWindows else "app menu"
 
 
+def _KeepFallbackLibraries() -> None:
+    """Linux AppImage: copy the bundled libsecret (and what it needs) to
+    ~/.local/share/SaraSuite/Libraries, for FletIdentity.py to give the Flet
+    client of every installed program on systems without it."""
+    Bundled = Path(getattr(sys, "_MEIPASS", "")) / "FallbackLibs"
+    if IsWindows or not Bundled.is_dir():
+        return
+    Kept = DataDir / "Libraries"
+    try:
+        Kept.mkdir(parents=True, exist_ok=True)
+        for Library in Bundled.iterdir():
+            if not (Kept / Library.name).exists() or (Kept / Library.name).stat().st_size != Library.stat().st_size:
+                shutil.copy2(Library, Kept / Library.name)
+    except OSError:
+        pass  # only a fallback
+
+
 def _LoadFletIdentity():
     # Lives in Programs/ (bundled as data) because installed programs get a
     # copy of the same file next to them.
@@ -324,6 +341,7 @@ def Main(Page: ft.Page) -> None:
 
 
 if __name__ == "__main__":
+    _KeepFallbackLibraries()  # also before a command (an install from the command line)
     if len(sys.argv) > 1:
         if IsWindows and getattr(sys, "frozen", False):
             # The .exe is built windowed (no console of its own); write the