feat(report): PDF SVG chart components (trend line + horizontal bar)

src/components/Report/reportCharts.tsx

@@ -0,0 +1,94 @@
+import React from 'react';
+import { Svg, Line, Polyline, Rect, Text as SvgText, G } from '@react-pdf/renderer';
+
+interface TrendChartProps {
+  labels: string[];
+  current: number[];
+  previous: number[] | null;
+  color: string;
+  width?: number;
+  height?: number;
+}
+
+export function PdfTrendChart({ labels, current, previous, color, width = 460, height = 140 }: TrendChartProps) {
+  const allValues = [...current, ...(previous ?? [])].filter(v => v > 0);
+  const max = allValues.length > 0 ? Math.max(...allValues) : 1;
+  const padL = 8, padR = 8, padT = 8, padB = 8;
+  const w = width - padL - padR;
+  const h = height - padT - padB;
+
+  const sx = (i: number) => padL + (labels.length > 1 ? (i / (labels.length - 1)) * w : w / 2);
+  const sy = (v: number) => padT + h - (v / max) * h;
+
+  const toPoints = (data: number[]) =>
+    data.map((v, i) => `${sx(i).toFixed(1)},${sy(v).toFixed(1)}`).join(' ');
+
+  const gridLines = [0.25, 0.5, 0.75, 1.0];
+
+  return (
+    <Svg width={width} height={height}>
+      {gridLines.map(f => (
+        <Line key={f}
+          x1={padL} y1={sy(max * f).toFixed(1)}
+          x2={width - padR} y2={sy(max * f).toFixed(1)}
+          stroke="#e2e8f0" strokeWidth={0.5} />
+      ))}
+      {previous && previous.some(v => v > 0) && (
+        <Polyline points={toPoints(previous)}
+          stroke="#94a3b8" strokeWidth={1.5} strokeDasharray="4 3" fill="none" />
+      )}
+      {current.some(v => v > 0) && (
+        <Polyline points={toPoints(current)}
+          stroke={color} strokeWidth={2.5} fill="none" />
+      )}
+      {labels
+        .filter((_, i) => labels.length <= 8 || i % Math.ceil(labels.length / 8) === 0)
+        .map((label) => {
+          const origIdx = labels.indexOf(label);
+          return (
+            <SvgText key={label}
+              x={sx(origIdx).toFixed(1)} y={height - 1}
+              fill="#94a3b8"
+              textAnchor="middle"
+              style={{ fontSize: 7 }}>
+              {label}
+            </SvgText>
+          );
+        })}
+    </Svg>
+  );
+}
+
+interface HBarChartProps {
+  items: Array<{ name: string; value: number }>;
+  color: string;
+  width?: number;
+}
+
+export function PdfHBarChart({ items, color, width = 460 }: HBarChartProps) {
+  const barH = 16;
+  const gap = 10;
+  const labelW = 150;
+  const valueW = 70;
+  const barAreaW = width - labelW - valueW - 8;
+  const max = Math.max(...items.map(i => i.value), 1);
+  const totalH = items.length * (barH + gap);
+
+  return (
+    <Svg width={width} height={totalH}>
+      {items.map((item, i) => {
+        const y = i * (barH + gap);
+        const bw = Math.max((item.value / max) * barAreaW, 2);
+        const shortName = item.name.length > 22 ? item.name.slice(0, 22) + '…' : item.name;
+        const valueStr = item.value.toLocaleString('en-SA', { maximumFractionDigits: 0 });
+        return (
+          <G key={item.name}>
+            <SvgText x={0} y={y + barH - 4} fill="#334155" style={{ fontSize: 8 }}>{shortName}</SvgText>
+            <Rect x={labelW} y={y} width={bw} height={barH} fill={color} rx={3} />
+            <SvgText x={labelW + bw + 4} y={y + barH - 4} fill="#64748b" style={{ fontSize: 8 }}>{valueStr}</SvgText>
+          </G>
+        );
+      })}
+    </Svg>
+  );
+}