feat(web-admin): add RMB uppercase converter for OA money field

Pure function with node:test coverage for zero, jiao/fen, and range limits.

Co-authored-by: Cursor <cursoragent@cursor.com>

web-admin/src/utils/rmb-upper.ts

@@ -0,0 +1,85 @@
+export function toRmbUpper(value: number | null | undefined): string {
+  if (value == null || !Number.isFinite(value) || value < 0) {
+    return ''
+  }
+
+  if (value > 999999999999.99) {
+    return '金额过大'
+  }
+
+  const fen = Math.round(value * 100)
+  if (fen === 0) {
+    return '零元整'
+  }
+
+  const digits = ['零', '壹', '贰', '叁', '肆', '伍', '陆', '柒', '捌', '玖']
+  const units = ['', '拾', '佰', '仟']
+
+  function sectionToChinese(n: number): string {
+    if (n === 0) return ''
+    let result = ''
+    let zeroPending = false
+    for (let i = 0; i < 4; i++) {
+      const digit = Math.floor(n / 10 ** (3 - i)) % 10
+      if (digit === 0) {
+        if (result !== '') {
+          zeroPending = true
+        }
+      } else {
+        if (zeroPending) {
+          result += '零'
+          zeroPending = false
+        }
+        result += digits[digit] + units[3 - i]
+      }
+    }
+    return result
+  }
+
+  const yuan = Math.floor(fen / 100)
+  const jiao = Math.floor((fen % 100) / 10)
+  const fenDigit = fen % 10
+
+  let result = ''
+
+  if (yuan > 0) {
+    const yi = Math.floor(yuan / 100000000)
+    const wan = Math.floor((yuan % 100000000) / 10000)
+    const rest = yuan % 10000
+
+    if (yi > 0) {
+      result += sectionToChinese(yi) + '亿'
+    }
+    if (wan > 0) {
+      if (yi > 0 && wan < 1000) {
+        result += '零'
+      }
+      result += sectionToChinese(wan) + '万'
+    } else if (yi > 0 && rest > 0) {
+      result += '零'
+    }
+    if (rest > 0) {
+      if ((yi > 0 || wan > 0) && rest < 1000) {
+        result += '零'
+      }
+      result += sectionToChinese(rest)
+    }
+    result += '元'
+  }
+
+  if (jiao > 0) {
+    result += digits[jiao] + '角'
+  } else if (fenDigit > 0 && yuan > 0) {
+    result += '零'
+  }
+
+  if (fenDigit > 0) {
+    result += digits[fenDigit] + '分'
+  }
+
+  if (jiao === 0 && fenDigit === 0) {
+    result += '整'
+  }
+
+  return result
+}