fix: 新增学习账号密码最少六字节 (#2)

admin/src/session.mjs

@@ -1,7 +1,7 @@
 export function normalizeUsername(value) { return value.trim().toLowerCase() }
-export function validPassword(value) {
+export function validPassword(value, minimum = 10) {
   const bytes = new TextEncoder().encode(value).length
-  return bytes >= 10 && bytes <= 72
+  return bytes >= minimum && bytes <= 72
 }
 export function validUsername(value) { return /^[a-z][a-z0-9_.-]{2,31}$/.test(normalizeUsername(value)) }
 export function createSession({ fetch, storage, changed = () => {} }) {
@@ -94,7 +94,7 @@ export function createSession({ fetch, storage, changed = () => {} }) {
     async createAccount(username, password) {
       authorized()
       if (!validUsername(username)) throw new Error('账号须为 3–32 位，以字母开头，仅含字母、数字、点、下划线或短横线')
-      if (!validPassword(password)) throw new Error('密码须为 10–72 字节')
+      if (!validPassword(password, 6)) throw new Error('密码须为 6–72 字节')
       return request('/accounts', 'POST', { username: normalizeUsername(username), password })
     },
     async updateAccount(id, patch) {