fix(print): wrap flex pages in block container to fix Chrome page breaks

Chrome's print engine silently ignores break-after/page-break-after on
flex containers. Wrapping each .print-page (flex) in a plain block
.print-page-break element gives Chrome a reliable page break anchor.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

pitch-deck/app/pitch-print/print.css

@@ -8,8 +8,9 @@
     margin: 0;
   }
 
-  body {
-    margin: 0;
+  html, body {
+    margin: 0 !important;
+    padding: 0 !important;
     -webkit-print-color-adjust: exact;
     print-color-adjust: exact;
   }
@@ -21,18 +22,33 @@
   .print-deck-wrapper {
     padding: 0 !important;
     margin: 0 !important;
+    display: block !important;
   }
 
-  .print-page {
+  /* Block wrapper handles page breaks — flex containers break unreliably in Chrome */
+  .print-page-break {
+    display: block !important;
     page-break-after: always !important;
     break-after: page !important;
     page-break-inside: avoid !important;
     break-inside: avoid !important;
     margin: 0 !important;
-    box-shadow: none !important;
+    padding: 0 !important;
+  }
+
+  .print-page-break:last-child {
+    page-break-after: auto !important;
+    break-after: auto !important;
+  }
+
+  /* Flex container for internal layout only — no break properties here */
+  .print-page {
     width: 297mm !important;
     height: 210mm !important;
     display: flex !important;
     flex-direction: column !important;
+    overflow: visible !important;
+    margin: 0 !important;
+    box-shadow: none !important;
   }
 }