OTA CI loop

src/config.h

@@ -5,8 +5,13 @@ namespace Config {
 // Updated by CI on every version release (see
     // .gitea/workflows/release.yml) - shown in the info screen
     // (Menu > System > Info). Locally built firmware shows "custom".
+    // The STR() macro converts the raw -D define to a string literal
+    // (needed because PlatformIO strips quotes from build flags).
+#define STR_HELPER(x) #x
+#define STR(x) STR_HELPER(x)
+
 #ifdef CI_VERSION
-    constexpr const char* APP_VERSION = CI_VERSION;
+    constexpr const char* APP_VERSION = STR(CI_VERSION);
 #else
     constexpr const char* APP_VERSION = "custom";
 #endif