fix: preserve detailed pages in PDF export

scripts/export_pdf.py

@@ -136,6 +136,7 @@ def _render_verified_payload(
             producer="Comic Sol 1.0",
             creationDate=False,
             modDate=False,
+            quality=95,
         )
         # Windows rejects fsync on a read-only descriptor.
         with temporary_path.open("rb+") as handle:

tests/test_export_pdf.py

@@ -1,5 +1,6 @@
 import hashlib
 import io
+import random
 import re
 import shutil
 import sys
@@ -8,7 +9,7 @@
 from pathlib import Path
 from unittest import mock
 
-from PIL import Image, UnidentifiedImageError
+from PIL import Image, ImageOps, UnidentifiedImageError
 
 ROOT = Path(__file__).resolve().parents[1]
 sys.path.insert(0, str(ROOT / "scripts"))
@@ -101,6 +102,21 @@ def test_pdf_records_150_dpi_within_round_trip_tolerance(self):
             self.assertAlmostEqual(150.0, effective_x, delta=0.2)
             self.assertAlmostEqual(150.0, effective_y, delta=0.2)
 
+    def test_detailed_page_survives_pdf_fidelity_gate(self):
+        noise = Image.frombytes(
+            "L", (320, 480), random.Random(0).randbytes(320 * 480)
+        )
+        page = ImageOps.colorize(
+            noise.resize((1600, 2400), Image.Resampling.LANCZOS),
+            (4, 12, 28),
+            (230, 150, 70),
+        )
+        noise.close()
+        page.save(self.project / "pages/page-001.png")
+        page.close()
+
+        self.assertTrue(export_pdf(self.project).is_file())
+
     def test_custom_output_path_and_cli_are_supported(self):
         custom = self.project / "deliverables/custom.pdf"
         self.assertEqual(custom, export_pdf(self.project, custom))