Kick off render loop from client tick

build/client-renderer/src/client/java/dev/github/copilot/renameable/RenderCatalogClient.java

@@ -15,6 +15,7 @@ import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 import net.fabricmc.api.ClientModInitializer;
+import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientTickEvents;
 import net.minecraft.client.Minecraft;
 import net.minecraft.client.Screenshot;
 import net.minecraft.client.gui.GuiGraphicsExtractor;
@@ -35,6 +36,7 @@ public final class RenderCatalogClient implements ClientModInitializer {
     private Path outputDir;
     private int currentJobIndex;
     private RenderScreen renderScreen;
+    private boolean renderStarted;
 
     @Override
     public void onInitializeClient() {
@@ -64,6 +66,14 @@ public final class RenderCatalogClient implements ClientModInitializer {
             client.setScreenAndShow(renderScreen);
         });
 
+        ClientTickEvents.END_CLIENT_TICK.register(tickedClient -> {
+            if (!renderStarted && tickedClient.screen == renderScreen) {
+                renderStarted = true;
+                System.out.println("[renderer] starting render loop from client tick");
+                renderCurrentJob(tickedClient, renderScreen);
+            }
+        });
+
         Thread activationWatchdog = new Thread(() -> {
             try {
                 Thread.sleep(SCREEN_ACTIVATION_TIMEOUT_MILLIS);