fix: replace images with correct local assets, fix label.png + bottom page refs in pdf_service.py

app/services/pdf_service.py

@@ -31,12 +31,25 @@ def _get_images_config() -> dict[str, Any]:
     cover_image = os.path.join(images_dir, "first_page.jpg")
     toc_image = os.path.join(images_dir, "toc.jpg")
     header_image = os.path.join(images_dir, "kenya_airlift_header.jpg")
-    label_image = os.path.join(images_dir, "label.jpeg")
 
-    bottom_pages = [
-        os.path.join(images_dir, f"LOPY-61-65_page-{i:04d}.jpg")
-        for i in range(1, 6)
+    # label: prefer .png, fall back to .jpeg
+    label_image = os.path.join(images_dir, "label.png")
+    if not os.path.isfile(label_image):
+        label_image = os.path.join(images_dir, "label.jpeg")
+
+    # Bottom pages — try both naming conventions
+    _bottom_candidates = [
+        f"ISP Handbook_Global-60-66_page-{i:04d}.jpg" for i in range(1, 5)
+    ] + [
+        f"LOPY-61-65_page-{i:04d}.jpg" for i in range(1, 6)
     ]
+    bottom_pages = []
+    _seen_bottom: set[str] = set()
+    for fname in _bottom_candidates:
+        p = os.path.join(images_dir, fname)
+        if os.path.isfile(p) and fname not in _seen_bottom:
+            bottom_pages.append(p)
+            _seen_bottom.add(fname)
 
     # Validate required images exist
     required = [cover_image, toc_image, header_image, label_image] + bottom_pages