32k pixel as hard group limit, better manual resolution support

copienator/commands/correction.py

@@ -1026,7 +1026,9 @@ def run_configured(args: argparse.Namespace) -> ExitCode:
         manual_path = INPUT_DIR / "manual_resolutions.txt"
         atomic_write_text(
             manual_path,
-            "###  Use -> x>, -x, ss, sx, xx, xs, c{43}1>, c{43}2x\n"
+            "### Use -> x>, -x, ss, sx, xx, xs, c{43}1>, c{43}2x; "
+            "delete a line to dismiss its conflict and keep its PDFs unchanged, "
+            "then run resolve-manual (even if all lines were deleted).\n"
             + "\n".join(unresolved_delayed)
             + "\n",
         )