feat: 添加账号支持选择学习平台

账号新增 platform 字段，登录/刷新课程/发现课程按平台分发；同时把 JS 脚本收进 script/（目录规范调整）。

web/src/App.tsx

@@ -75,6 +75,7 @@ function accountPayload(account: Account) {
   return {
     id: account.id,
     username: account.username,
+    platform: account.platform || 'guanyixue',
     note: account.note || '',
     user: account.user || '',
     cookies: account.cookies || [],
@@ -93,6 +94,9 @@ export default function App() {
   const [accounts, setAccounts] = useState<Account[]>([])
   const accountsRef = useRef(accounts)
   const [platforms, setPlatforms] = useState<Record<string, string>>({ guanyixue: '莞易学' })
+  const [platformList, setPlatformList] = useState<PlatformInfo[]>([
+    { id: 'guanyixue', label: '莞易学' },
+  ])
   const [offline, setOffline] = useState(false)
   const [toast, setToast] = useState<ToastState | null>(null)
   const [pending, setPending] = useState<Record<string, string>>({})
@@ -193,9 +197,12 @@ export default function App() {
   useEffect(() => {
     api<{ platforms: PlatformInfo[] }>('/api/platforms')
       .then((response) => {
+        const list = response.platforms || []
+        if (!list.length) return
+        setPlatformList(list)
         const map: Record<string, string> = {}
-        for (const platform of response.platforms || []) map[platform.id] = platform.label
-        if (Object.keys(map).length) setPlatforms(map)
+        for (const platform of list) map[platform.id] = platform.label
+        setPlatforms(map)
       })
       .catch(() => {})
   }, [])
@@ -366,7 +373,10 @@ export default function App() {
       try {
         let response = await api<CoursesResponse>('/api/courses', {
           method: 'POST',
-          body: JSON.stringify({ cookies: account.cookies }),
+          body: JSON.stringify({
+            cookies: account.cookies,
+            platform: account.platform || 'guanyixue',
+          }),
         })
         if (!response.ok && response.code === 'session_expired') {
           notify({ message: '会话已失效，正在自动重新登录…' })
@@ -578,6 +588,7 @@ export default function App() {
       method: 'POST',
       body: JSON.stringify({
         username: data.username,
+        platform: data.platform,
         password: data.password,
         note: data.note,
         cookies: [],
@@ -621,7 +632,8 @@ export default function App() {
   }
 
   function platformLabel(account: Account) {
-    const id = (account.courses || []).find((course) => course.platform)?.platform
+    const id =
+      account.platform || (account.courses || []).find((course) => course.platform)?.platform
     return (id && platforms[id]) || '莞易学'
   }
 
@@ -749,6 +761,7 @@ export default function App() {
 
       <AddAccountDialog
         open={dialog?.type === 'add'}
+        platforms={platformList}
         onClose={() => setDialog(null)}
         onSubmit={addAccount}
       />

web/src/components/AddAccountDialog.tsx

@@ -1,5 +1,7 @@
 import { useEffect, useState } from 'react'
+import { ChevronDown, GraduationCap } from 'lucide-react'
 
+import type { PlatformInfo } from '../types'
 import { Modal } from './ui/Modal'
 import { Button } from './ui/Button'
 import { inputCls } from '../lib/utils'
@@ -8,20 +10,24 @@ export interface NewAccount {
   username: string
   password: string
   note: string
+  platform: string
 }
 
 export function AddAccountDialog({
   open,
+  platforms,
   onClose,
   onSubmit,
 }: {
   open: boolean
+  platforms: PlatformInfo[]
   onClose: () => void
   onSubmit: (account: NewAccount) => Promise<void>
 }) {
   const [username, setUsername] = useState('')
   const [password, setPassword] = useState('')
   const [note, setNote] = useState('')
+  const [platform, setPlatform] = useState(platforms[0]?.id || 'guanyixue')
   const [saving, setSaving] = useState(false)
   const [error, setError] = useState('')
 
@@ -30,9 +36,10 @@ export function AddAccountDialog({
     setUsername('')
     setPassword('')
     setNote('')
+    setPlatform(platforms[0]?.id || 'guanyixue')
     setError('')
     setSaving(false)
-  }, [open])
+  }, [open, platforms])
 
   async function submit() {
     if (!username.trim() || !password) {
@@ -42,7 +49,7 @@ export function AddAccountDialog({
     setSaving(true)
     setError('')
     try {
-      await onSubmit({ username: username.trim(), password, note: note.trim() })
+      await onSubmit({ username: username.trim(), password, note: note.trim(), platform })
       onClose()
     } catch (err) {
       setError(err instanceof Error ? err.message : String(err))
@@ -69,6 +76,27 @@ export function AddAccountDialog({
       }
     >
       <div className="space-y-4">
+        <div>
+          <label className="mb-1.5 block text-[12px] font-medium text-slate-600">学习平台</label>
+          <div className="relative">
+            <GraduationCap className="pointer-events-none absolute left-2.5 top-1/2 size-3.5 -translate-y-1/2 text-slate-400" />
+            <select
+              className={`${inputCls} appearance-none pl-8 pr-8`}
+              value={platform}
+              onChange={(event) => setPlatform(event.target.value)}
+            >
+              {platforms.map((item) => (
+                <option key={item.id} value={item.id}>
+                  {item.label}
+                </option>
+              ))}
+            </select>
+            <ChevronDown className="pointer-events-none absolute right-2.5 top-1/2 size-3.5 -translate-y-1/2 text-slate-400" />
+          </div>
+          <p className="mt-1.5 text-[11px] leading-relaxed text-slate-400">
+            选「莞易学」后，后台会自动识别旧版 / 新版课程页并按对应实现学习；后续新增的平台会出现在这里。
+          </p>
+        </div>
         <div>
           <label className="mb-1.5 block text-[12px] font-medium text-slate-600">登录账号</label>
           <input

web/src/components/QuizDialog.tsx

@@ -47,6 +47,7 @@ export function QuizDialog({
     try {
       const body: Record<string, unknown> = {
         cookies: account.cookies,
+        platform: account.platform || 'guanyixue',
         plan_id: course.plan_id,
         project_id: course.project_id,
         name: course.name || '',

web/src/types.ts

@@ -37,6 +37,7 @@ export interface RunState {
 export interface Account {
   id: string
   username: string
+  platform?: string
   note?: string
   user?: string
   cookies: Cookie[]