Add desktop entry

Versioned at the crate root per convention (bare-binary Exec,
Icon= = binary name); ccebuild install discovers it, making the app
visible to the launcher. Icon glyph lands in cce-icons.

Co-Authored-By: Claude Fable 5 <[email protected]>

 cce-calendar.desktop | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/cce-calendar.desktop b/cce-calendar.desktop
new file mode 100644
index 0000000..d5588fb
--- /dev/null
+++ b/cce-calendar.desktop
@@ -0,0 +1,10 @@
+[Desktop Entry]
+Type=Application
+Name=Calendar
+Comment=Month-view calendar
+Exec=cce-calendar
+Icon=cce-calendar
+Categories=Office;Calendar;
+Terminal=false
+StartupNotify=true
+StartupWMClass=cce-calendar