Name the desktop binary photog

The CMake target stays 'uploader' but the output binary is now 'photog',
matching the package and app, so 'nix run' and the desktop entry resolve
it (nix run looked for bin/photog and failed on bin/uploader). Also set
meta.mainProgram.

desktop/CMakeLists.txt

@@ -26,6 +26,10 @@ target_link_libraries(uploader PRIVATE
     Qt6Keychain::Qt6Keychain
 )
 
+# The binary is "photog" (matching the app + package), so `nix run` and the
+# desktop entry find it; the CMake target stays "uploader".
+set_target_properties(uploader PROPERTIES OUTPUT_NAME photog)
+
 # Installation — the binary, a desktop entry, and the app icon in the hicolor
 # theme, so `nix profile install ./desktop` puts "Photog" in the app menu.
 include(GNUInstallDirs)

desktop/flake.nix

@@ -34,6 +34,7 @@
             qt6.wrapQtAppsHook
           ];
           buildInputs = [ pkgs.qt6Packages.qtkeychain ] ++ qtModules;
+          meta.mainProgram = "photog";
         };
 
         devShells.default = pkgs.mkShell {

desktop/photog.desktop

@@ -3,7 +3,7 @@ Type=Application
 Name=Photog
 GenericName=Photo Uploader
 Comment=Upload photos to your gallery
-Exec=uploader
+Exec=photog
 Icon=photog
 Terminal=false
 Categories=Graphics;Photography;Network;