Add sharing options and a printable flyer page to the website

Implement share and PDF export buttons on the home page, and create a new flyer page with a customizable QR code for printing and distribution.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 923ae0e3-a363-4db8-b04a-e8baca2a1330
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: a2b8df7d-660f-4020-961b-e37cb231d6a4
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/8af7d2ec-2cc3-4ece-8af3-9f071488d072/923ae0e3-a363-4db8-b04a-e8baca2a1330/Z3YUti7
Replit-Helium-Checkpoint-Created: true

artifacts/voix-du-peuple/src/index.css

@@ -302,3 +302,26 @@
     inset: -1px;
   }
 }
+
+/* ─── Impression / PDF ─────────────────────────────────────── */
+@media print {
+  /* Masquer tout sauf le flyer */
+  header,
+  nav,
+  .no-print {
+    display: none !important;
+  }
+
+  #flyer-print {
+    box-shadow: none !important;
+    border: none !important;
+    max-width: 100% !important;
+    width: 100% !important;
+    aspect-ratio: auto !important;
+    page-break-inside: avoid;
+  }
+
+  body {
+    background: white !important;
+  }
+}