first commit

app/scripts/gen-swiss.cjs

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+const fs = require('fs')
+const path = require('path')
+const infile = path.join(__dirname, '..', '..', 'CH.txt')
+const out = fs.readFileSync(infile, 'utf8')
+const lines = out.split(/\r?\n/)
+const map = new Map()
+for (const line of lines) {
+  if (!line || line.trim() === '') continue
+  const parts = line.split('\t')
+  const zip = parts[1]
+  const name = parts[2]
+  const canton = parts[4] || ''
+  if (!zip) continue
+  if (!map.has(zip)) {
+    map.set(zip, { zip, city: name, canton })
+  }
+}
+const arr = Array.from(map.values())
+function escapeStr(s){ return String(s).replace(/\\/g,'\\\\').replace(/'/g, "\\'") }
+let ts = 'export const SWISS_CITIES = [\n'
+for (const e of arr) {
+  ts += `  { zip: '${escapeStr(e.zip)}', city: '${escapeStr(e.city)}', canton: '${escapeStr(e.canton)}' },\n`
+}
+ts += ']\n'
+console.log(ts)