fix(pdf): skip section gap on new page, reserve space for CAPA label

- Fix 1: drawSection now checks if ensureSpace triggered a page break by
  comparing state.y before/after. Only subtract SECTION_GAP if we're not
  at the top of a fresh page, avoiding wasting 20px after page breaks.

- Fix 2: CAPA loop now reserves LINE_HEIGHT * 4 instead of just LINE_HEIGHT
  to keep the label and at least a few fields together on the same page.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HEYxFQiCyxJvnBCoZeYzB9

lib/pdf/incident-report.ts

@@ -98,8 +98,12 @@ function wrapText(text: string, maxWidth: number, font: EmbeddedFont, size: numb
 }
 
 function drawSection(state: State, title: string): void {
+  const yBefore = state.y
   ensureSpace(state, SECTION_GAP + LINE_HEIGHT + 6)
+  // Only add gap if we didn't just start a new page
+  if (state.y === yBefore) {
     state.y -= SECTION_GAP
+  }
   currentPage(state).drawRectangle({
     x: MARGIN, y: state.y - 4,
     width: PAGE_WIDTH - MARGIN * 2, height: LINE_HEIGHT + 4,
@@ -213,7 +217,7 @@ export async function buildIncidentReportPdf(data: IncidentReportData): Promise<
     drawSection(state, `CAPA Actions (${data.capas.length})`)
     for (let i = 0; i < data.capas.length; i++) {
       const c = data.capas[i]
-      ensureSpace(state, LINE_HEIGHT)
+      ensureSpace(state, LINE_HEIGHT * 4)
       currentPage(state).drawText(`#${i + 1}`, {
         x: MARGIN, y: state.y,
         size: BODY_FONT_SIZE, font: boldFont, color: rgb(0, 0, 0),