feat(viewer): add PrintMode for browser print/PDF export

Adds RenderOptions.PrintMode flag. When true:
- view.js (table filters) is not loaded
- window.print() fires on page load
- @media print CSS hides filters, collapses grid to single column,
  adds page-break hints for section cards

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

web/static/view.css

@@ -432,3 +432,45 @@ body {
 
 
 }
+
+/* ── Print / PDF ──────────────────────────────────── */
+
+@media print {
+  .page-header {
+    background: #fff;
+    color: #000;
+    padding: 8px 0;
+  }
+
+  .header-actions {
+    display: none;
+  }
+
+  .page-main {
+    width: 100%;
+    margin: 0;
+  }
+
+  .sections-grid {
+    grid-template-columns: 1fr;
+  }
+
+  .section-card-half,
+  .section-card-full {
+    grid-column: auto;
+  }
+
+  .section-card {
+    break-inside: avoid;
+    page-break-inside: avoid;
+    margin-bottom: 20px;
+  }
+
+  .filter-row {
+    display: none;
+  }
+
+  .data-table tbody tr:hover {
+    background: transparent;
+  }
+}