chore: source app display name from platform config

linux/runner/CMakeLists.txt

@@ -16,8 +16,10 @@ add_executable(${BINARY_NAME}
 # that need different build settings.
 apply_standard_settings(${BINARY_NAME})
 
-# Add preprocessor definitions for the application ID.
+# Add preprocessor definitions for the application ID and title. The values come
+# from the top-level CMakeLists.txt so they are not duplicated in C++ sources.
 add_definitions(-DAPPLICATION_ID="${APPLICATION_ID}")
+add_definitions(-DAPPLICATION_TITLE="${APPLICATION_TITLE}")
 
 # Add dependency libraries. Add any application-specific dependencies here.
 target_link_libraries(${BINARY_NAME} PRIVATE flutter)

linux/runner/my_application.cc

@@ -31,7 +31,10 @@ static void my_application_activate(GApplication* application) {
   // out of place and noticeably thicker than the native title bar. Relying on
   // the compositor gives the native Breeze/KWin decoration on Plasma, and the
   // desktop's own title bar everywhere else.
-  gtk_window_set_title(window, "KiriMemo");
+  // The title comes from APPLICATION_TITLE in linux/CMakeLists.txt (passed as a
+  // preprocessor definition by linux/runner/CMakeLists.txt), so the name lives
+  // in the project configuration instead of being duplicated here.
+  gtk_window_set_title(window, APPLICATION_TITLE);
 
   gtk_window_set_default_size(window, 1280, 720);