fix(pdf): fix header overlap on new pages, force pagebreak per voltage table, and center grid titles

scripts/generate-pdf-datasheets-pdf-lib.ts

@@ -1199,7 +1199,8 @@ function drawKeyValueTable(args: {
   if (args.title) {
     page.drawText(args.title, {
       x: margin + padX,
-      y: boxTopY - (headerPadY + 12),
+      // Perfectly center the 10pt text vertically inside the 28pt (10+18) header band
+      y: boxTopY - 18,
       size: 10,
       font: fontBold,
       color: navy,
@@ -1283,7 +1284,7 @@ function drawKeyValueTable(args: {
     }
   }
 
-  return Math.max(contentMinY, boxBottomY - 18);
+  return Math.max(contentMinY, boxBottomY - 12);
 }
 
 // Backward compatibility wrapper for metagrid
@@ -4092,10 +4093,13 @@ async function generatePDF(product: ProductData, locale: 'en' | 'de'): Promise<B
       syncCtxForPage(page);
       drawPageBackground(page);
       drawFooter(ctx);
-      y = drawHeader(ctx, height); // pass height, we override dividerY internally inside drawHeader
-      // stampProductName(); // Assuming this function is defined elsewhere or will be added.
-      if (opts?.includeProductName) y = drawProductNameOnPage(page, y); // Update y after drawing product name
-      return ctx.headerDividerY - 24; // spacing below header line
+      let newY = drawHeader(ctx, height); // pass height, we override dividerY internally inside drawHeader
+      if (opts?.includeProductName) {
+        newY = drawProductNameOnPage(page, newY); // Update y after drawing product name
+      } else {
+        newY = ctx.headerDividerY - 24; // spacing below header line
+      }
+      return newY;
     };
 
     const hasSpace = (needed: number) => y - needed >= contentMinY;
@@ -4359,24 +4363,14 @@ async function generatePDF(product: ProductData, locale: 'en' | 'de'): Promise<B
       const firstColLabel = locale === 'de' ? 'Adern & Querschnitt' : 'Cores & cross-section';
 
       for (const t of tables) {
-        // Only apply top margin if we aren't at the very start of the page
-        if (hasRenderedContent && y - 10 >= contentMinY) y -= 10;
-
-        // Check if we need a new page for this voltage table
-        // Estimate: meta block (if shown) + table header + at least 3 data rows
-        const estimateMetaH = (itemsCount: number) => {
-          // Always render a voltage-group header (even for single-voltage products)
-          // so all datasheets look consistent.
-          const titleH = 14;
-          const rowH = 14;
-          const cols = 3;
-          const rows = Math.max(1, Math.ceil(Math.max(0, itemsCount) / cols));
-          return titleH + rows * rowH + 8;
-        };
-        const minTableH = 16 /*header*/ + 9 * 3 /*3 rows*/ + 10; /*pad*/
-        const minNeeded = estimateMetaH((t.metaItems || []).length) + minTableH;
-        if (y - minNeeded < contentMinY) {
+        // ALWAYS create a new page per Cross-Section Table as requested by the user.
+        // We set `includeProductName: true` so the product name is visible on these new pages.
+        if (hasRenderedContent) {
           y = newPage({ includeProductName: true, landscape: false });
+        } else {
+          // If we happen to be at the exact top of the first page (no tech data),
+          // we just apply a clean standard margin instead of a page break.
+          y -= 10;
         }
 
         // Top meta block: always render per voltage group.