Add native place cascading selector and generated data

web/scripts/generate-native-place-data.mjs

@@ -0,0 +1,43 @@
+import { readFile, writeFile } from 'node:fs/promises'
+import { resolve } from 'node:path'
+
+const [inputFile, outputFile] = process.argv.slice(2)
+
+if (!inputFile || !outputFile) {
+  throw new Error('用法：node scripts/generate-native-place-data.mjs <ok_data_level4.csv> <输出文件>')
+}
+
+function parseCsvLine(line) {
+  const values = []
+  let value = ''
+  let quoted = false
+
+  for (let index = 0; index < line.length; index += 1) {
+    const character = line[index]
+    if (character === '"') {
+      if (quoted && line[index + 1] === '"') {
+        value += character
+        index += 1
+      } else {
+        quoted = !quoted
+      }
+    } else if (character === ',' && !quoted) {
+      values.push(value)
+      value = ''
+    } else {
+      value += character
+    }
+  }
+  values.push(value)
+  return values
+}
+
+const csv = await readFile(resolve(inputFile), 'utf8')
+const rows = csv.trim().split(/\r?\n/).slice(1).map((line) => {
+  const [id, pid, deep, , , , , name] = parseCsvLine(line)
+  return [Number(id), Number(pid), Number(deep), name]
+})
+
+const source = `// 由 AreaCity-JsSpider-StatsGov 的 ok_data_level4.csv 生成，数据版本 2025.251231.260403（2026-04-03）。\n// 上游项目采用 MIT License：https://github.com/xiangyuecn/AreaCity-JsSpider-StatsGov\nexport type NativePlaceRow = readonly [id: number, pid: number, deep: number, name: string]\n\nexport const nativePlaceRows: readonly NativePlaceRow[] = ${JSON.stringify(rows)} as const\n`
+
+await writeFile(resolve(outputFile), source, 'utf8')