feat(auth): add user referral system with invite codes

Generate unique referral codes for users
Allow new users to register with a referral code
Display referral stats and invite link in user profile

DESIGN.md

@@ -121,6 +121,29 @@
   - 更新显示名后，API 仍只返回当前用户必要字段，不返回 session、token/hash、内部审计或调试数据。
   - 显示名用于编辑署名、讨论和 Life 内容作者展示。
 
+## Referral
+
+- Referral 是账号功能，用于让已注册用户邀请新用户加入 Pokopia Wiki。
+- 每个用户都有一个稳定的 Referral Code：
+  - 由系统生成。
+  - 全局唯一。
+  - 只包含大写英文字母和数字。
+  - 现有用户在首次读取 Referral 信息或重新注册未验证账号时自动补齐。
+- 登录用户可在 `/profile` 查看自己的 Referral Code、邀请链接和有效邀请数量。
+- 邀请链接使用前端注册页路径：`/register?ref=CODE`。
+- 注册页支持：
+  - 从 `ref` query 自动填入 Referral Code。
+  - 用户手动输入 Referral Code。
+  - Referral Code 可为空。
+- 注册提交时后端校验 Referral Code：
+  - 无效 Referral Code 拒绝注册并返回本地化错误。
+  - 用户不能使用自己的 Referral Code；如邮箱已存在且该账号已有 Referral Code，注册时不能将自己设为邀请人。
+  - 已存在未验证账号重新注册时，不覆盖已有邀请关系。
+- Referral 只有在被邀请用户完成邮箱验证后才计入有效邀请数量。
+- Referral 不改变现有邮箱验证要求；用户仍必须验证邮箱后才能登录和编辑。
+- 当前版本不提供积分奖励、排行榜、邀请邮件发送、邀请制注册限制、后台统计或公开邀请人资料页。
+- Referral API 对外只返回当前用户自己的 Referral 摘要，不返回被邀请用户邮箱、token/hash、内部审计字段或被邀请用户明细。
+
 ## Community 编辑与审计
 
 - 已验证用户可以通过前台或管理入口编辑 Wiki 内容。
@@ -600,6 +623,7 @@ API 暴露边界：
 - `POST /api/auth/reset-password`
 - `GET /api/auth/me`
 - `PATCH /api/auth/me`：更新当前用户显示名；需要登录；只接收并返回当前用户必要字段。
+- `GET /api/auth/referral`：读取当前用户 Referral 摘要；需要登录；返回 `referral`，其中只包含 `code`、`url`、`verifiedReferralCount`。
 - `POST /api/auth/logout`
 
 已验证用户编辑 API：

backend/db/schema.sql

@@ -78,13 +78,28 @@ CREATE TABLE IF NOT EXISTS users (
   email text NOT NULL UNIQUE,
   display_name text NOT NULL,
   password_hash text NOT NULL,
+  referral_code text,
+  referred_by_user_id integer REFERENCES users(id) ON DELETE SET NULL,
   email_verified_at timestamptz,
   created_at timestamptz NOT NULL DEFAULT now(),
   updated_at timestamptz NOT NULL DEFAULT now(),
   CHECK (email = lower(email)),
-  CHECK (length(display_name) BETWEEN 1 AND 40)
+  CHECK (length(display_name) BETWEEN 1 AND 40),
+  CHECK (referral_code IS NULL OR referral_code ~ '^[A-Z0-9]{8,16}$')
 );
 
+ALTER TABLE users ADD COLUMN IF NOT EXISTS referral_code text;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS referred_by_user_id integer REFERENCES users(id) ON DELETE SET NULL;
+ALTER TABLE users DROP CONSTRAINT IF EXISTS users_referral_code_check;
+ALTER TABLE users ADD CONSTRAINT users_referral_code_check CHECK (referral_code IS NULL OR referral_code ~ '^[A-Z0-9]{8,16}$');
+
+CREATE UNIQUE INDEX IF NOT EXISTS users_referral_code_idx
+  ON users(referral_code)
+  WHERE referral_code IS NOT NULL;
+
+CREATE INDEX IF NOT EXISTS users_referred_by_user_id_idx
+  ON users(referred_by_user_id);
+
 CREATE TABLE IF NOT EXISTS system_wording_keys (
   key text PRIMARY KEY,
   module text NOT NULL,

backend/src/auth.ts

@@ -11,6 +11,9 @@ const passwordResetTokenHours = 1;
 const rememberedSessionDays = 30;
 const sessionOnlySessionDays = 1;
 const defaultLocale = 'en';
+const referralCodeLength = 8;
+const referralAlphabet = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789';
+const referralCodePattern = /^[A-Z0-9]{8,16}$/;
 
 type DbClient = PoolClient;
 
@@ -27,6 +30,15 @@ type LoginUserRow = UserRow & {
   password_hash: string;
 };
 
+type RegistrationUserRow = UserRow & {
+  referral_code: string | null;
+  referred_by_user_id: number | null;
+};
+
+type ReferralCodeRow = QueryResultRow & {
+  referral_code: string | null;
+};
+
 type AuthMessageKey =
   | 'emailRequired'
   | 'invalidEmail'
@@ -42,6 +54,7 @@ type AuthMessageKey =
   | 'invalidCredentials'
   | 'verifyEmailFirst'
   | 'invalidResetToken'
+  | 'invalidReferralCode'
   | 'emailSubject'
   | 'emailHtml'
   | 'emailText'
@@ -58,6 +71,12 @@ export type AuthUser = {
   emailVerified: boolean;
 };
 
+export type ReferralSummary = {
+  code: string;
+  url: string;
+  verifiedReferralCount: number;
+};
+
 function statusError(message: string, statusCode: number): StatusError {
   const error = new Error(message) as StatusError;
   error.statusCode = statusCode;
@@ -80,6 +99,7 @@ function authMessage(locale: string, key: AuthMessageKey, params: Record<string,
     invalidCredentials: 'server.auth.invalidCredentials',
     verifyEmailFirst: 'server.auth.verifyEmailFirst',
     invalidResetToken: 'server.auth.invalidResetToken',
+    invalidReferralCode: 'server.auth.invalidReferralCode',
     emailSubject: 'email.auth.verificationSubject',
     emailHtml: 'email.auth.verificationHtml',
     emailText: 'email.auth.verificationText',
@@ -137,6 +157,27 @@ async function cleanToken(
   return value.trim();
 }
 
+async function cleanReferralCode(value: unknown, locale: string): Promise<string | null> {
+  if (value === undefined || value === null) {
+    return null;
+  }
+
+  if (typeof value !== 'string') {
+    throw statusError(await authMessage(locale, 'invalidReferralCode'), 400);
+  }
+
+  const referralCode = value.trim().toUpperCase();
+  if (!referralCode) {
+    return null;
+  }
+
+  if (!referralCodePattern.test(referralCode)) {
+    throw statusError(await authMessage(locale, 'invalidReferralCode'), 400);
+  }
+
+  return referralCode;
+}
+
 function toPublicUser(user: UserRow): AuthUser {
   return {
     id: user.id,
@@ -196,6 +237,80 @@ function hashToken(token: string): string {
   return createHash('sha256').update(token).digest('hex');
 }
 
+function createReferralCode(): string {
+  const bytes = randomBytes(referralCodeLength);
+  return [...bytes].map((byte) => referralAlphabet[byte % referralAlphabet.length]).join('');
+}
+
+function isUniqueViolation(error: unknown): boolean {
+  return typeof error === 'object' && error !== null && 'code' in error && (error as { code?: unknown }).code === '23505';
+}
+
+async function ensureReferralCode(client: DbClient, userId: number): Promise<string> {
+  const existing = await clientQueryOne<ReferralCodeRow>(client, 'SELECT referral_code FROM users WHERE id = $1', [userId]);
+  if (existing?.referral_code) {
+    return existing.referral_code;
+  }
+
+  for (let attempt = 0; attempt < 10; attempt += 1) {
+    const referralCode = createReferralCode();
+    try {
+      const updated = await clientQueryOne<ReferralCodeRow>(
+        client,
+        `
+          UPDATE users
+          SET referral_code = $1, updated_at = now()
+          WHERE id = $2
+            AND referral_code IS NULL
+          RETURNING referral_code
+        `,
+        [referralCode, userId]
+      );
+
+      if (updated?.referral_code) {
+        return updated.referral_code;
+      }
+
+      const current = await clientQueryOne<ReferralCodeRow>(client, 'SELECT referral_code FROM users WHERE id = $1', [
+        userId
+      ]);
+      if (current?.referral_code) {
+        return current.referral_code;
+      }
+    } catch (error) {
+      if (!isUniqueViolation(error)) {
+        throw error;
+      }
+    }
+  }
+
+  throw new Error('Failed to assign referral code');
+}
+
+async function referralUserId(
+  client: DbClient,
+  referralCode: string,
+  currentUserId: number | null,
+  locale: string
+): Promise<number> {
+  const row = await clientQueryOne<QueryResultRow & { id: number }>(client, 'SELECT id FROM users WHERE referral_code = $1', [
+    referralCode
+  ]);
+
+  if (!row || (currentUserId !== null && row.id === currentUserId)) {
+    throw statusError(await authMessage(locale, 'invalidReferralCode'), 400);
+  }
+
+  return row.id;
+}
+
+function buildReferralUrl(code: string): string {
+  const origin = process.env.APP_ORIGIN ?? process.env.FRONTEND_ORIGIN ?? 'http://localhost:3000';
+  const url = new URL('/register', origin);
+  url.searchParams.set('ref', code);
+  return url.toString();
+}
+
 function getEmailConfig() {
   const apiKey = process.env.RESEND_API_KEY;
   const from = process.env.EMAIL_FROM;
@@ -280,14 +395,15 @@ export async function registerUser(payload: Record<string, unknown>, locale = de
   const email = await cleanEmail(payload.email, locale);
   const displayName = await cleanDisplayName(payload.displayName, locale);
   const password = await cleanPassword(payload.password, locale);
+  const referralCode = await cleanReferralCode(payload.referralCode, locale);
   const passwordHash = await hashPassword(password);
   const verificationToken = createPlainToken();
   const verificationTokenHash = hashToken(verificationToken);
 
   await withTransaction(async (client) => {
-    const existingUser = await clientQueryOne<UserRow>(
+    const existingUser = await clientQueryOne<RegistrationUserRow>(
       client,
-      'SELECT id, email, display_name, email_verified_at FROM users WHERE email = $1',
+      'SELECT id, email, display_name, referral_code, referred_by_user_id, email_verified_at FROM users WHERE email = $1',
       [email]
     );
 
@@ -295,23 +411,24 @@ export async function registerUser(payload: Record<string, unknown>, locale = de
       throw statusError(await authMessage(locale, 'emailAlreadyRegistered'), 409);
     }
 
+    const referrerUserId = referralCode ? await referralUserId(client, referralCode, existingUser?.id ?? null, locale) : null;
     const user = existingUser
-      ? await clientQueryOne<UserRow>(
+      ? await clientQueryOne<RegistrationUserRow>(
           client,
           `
             UPDATE users
             SET display_name = $1, password_hash = $2, updated_at = now()
             WHERE id = $3
-            RETURNING id, email, display_name, email_verified_at
+            RETURNING id, email, display_name, referral_code, referred_by_user_id, email_verified_at
           `,
           [displayName, passwordHash, existingUser.id]
         )
-      : await clientQueryOne<UserRow>(
+      : await clientQueryOne<RegistrationUserRow>(
           client,
           `
             INSERT INTO users (email, display_name, password_hash)
             VALUES ($1, $2, $3)
-            RETURNING id, email, display_name, email_verified_at
+            RETURNING id, email, display_name, referral_code, referred_by_user_id, email_verified_at
           `,
           [email, displayName, passwordHash]
         );
@@ -320,6 +437,14 @@ export async function registerUser(payload: Record<string, unknown>, locale = de
       throw new Error('Failed to save user');
     }
 
+    await ensureReferralCode(client, user.id);
+    if (referrerUserId && user.referred_by_user_id === null) {
+      await client.query('UPDATE users SET referred_by_user_id = $1, updated_at = now() WHERE id = $2', [
+        referrerUserId,
+        user.id
+      ]);
+    }
+
     await client.query('DELETE FROM email_verification_tokens WHERE user_id = $1 AND used_at IS NULL', [user.id]);
     await client.query(
       `
@@ -530,6 +655,23 @@ export async function updateCurrentUser(
   return toPublicUser(user);
 }
 
+export async function getReferralSummary(userId: number): Promise<ReferralSummary> {
+  return withTransaction(async (client) => {
+    const code = await ensureReferralCode(client, userId);
+    const countRow = await clientQueryOne<QueryResultRow & { count: string }>(
+      client,
+      'SELECT COUNT(*)::text AS count FROM users WHERE referred_by_user_id = $1 AND email_verified_at IS NOT NULL',
+      [userId]
+    );
+
+    return {
+      code,
+      url: buildReferralUrl(code),
+      verifiedReferralCount: Number(countRow?.count ?? 0)
+    };
+  });
+}
+
 export async function logoutSession(token: string): Promise<void> {
   if (token.length < 32) {
     return;

backend/src/server.ts

@@ -5,6 +5,7 @@ import Fastify from 'fastify';
 import type { FastifyReply, FastifyRequest } from 'fastify';
 import { mkdir } from 'node:fs/promises';
 import {
+  getReferralSummary,
   getUserBySessionToken,
   loginUser,
   logoutSession,
@@ -239,6 +240,17 @@ app.patch('/api/auth/me', async (request, reply) => {
   return { user: await updateCurrentUser(user.id, payload, requestLocale(request)) };
 });
 
+app.get('/api/auth/referral', async (request, reply) => {
+  const token = getBearerToken(request.headers.authorization);
+  const user = token ? await getUserBySessionToken(token) : null;
+
+  if (!user) {
+    return reply.code(401).send({ message: await serverMessage(requestLocale(request), 'loginRequired') });
+  }
+
+  return { referral: await getReferralSummary(user.id) };
+});
+
 app.post('/api/auth/logout', async (request, reply) => {
   const token = getBearerToken(request.headers.authorization);
   if (token) {

frontend/src/icons.ts

@@ -10,6 +10,7 @@ export const iconChecklist: AppIcon = 'mdi:checkbox-marked-outline';
 export const iconChevronDown: AppIcon = 'mdi:chevron-down';
 export const iconClose: AppIcon = 'mdi:close';
 export const iconComment: AppIcon = 'mdi:comment-outline';
+export const iconCopy: AppIcon = 'mdi:content-copy';
 export const iconDelete: AppIcon = 'mdi:trash-can-outline';
 export const iconDish: AppIcon = 'mdi:silverware-fork-knife';
 export const iconDragHandle: AppIcon = 'mdi:drag';
@@ -32,6 +33,7 @@ export const iconNoRecipe: AppIcon = 'mdi:file-document-remove-outline';
 export const iconPokemon: AppIcon = 'mdi:pokeball';
 export const iconProfile: AppIcon = 'mdi:account-circle-outline';
 export const iconRecipe: AppIcon = 'mdi:book-open-page-variant-outline';
+export const iconReferral: AppIcon = 'mdi:account-multiple-plus-outline';
 export const iconRegister: AppIcon = 'mdi:account-plus-outline';
 export const iconReply: AppIcon = 'mdi:reply-outline';
 export const iconReactionFun: AppIcon = 'mdi:party-popper';

frontend/src/services/api.ts

@@ -316,6 +316,12 @@ export interface AuthUser {
   emailVerified: boolean;
 }
 
+export interface ReferralSummary {
+  code: string;
+  url: string;
+  verifiedReferralCount: number;
+}
+
 export interface UserProfilePayload {
   displayName: string;
 }
@@ -328,6 +334,7 @@ export interface LoginPayload {
 
 export interface RegisterPayload extends LoginPayload {
   displayName: string;
+  referralCode?: string;
 }
 
 export interface AuthResponse {
@@ -637,6 +644,7 @@ export const api = {
     sendJson<{ message: string }>('/api/auth/reset-password', 'POST', payload),
   me: () => getJson<{ user: AuthUser }>('/api/auth/me'),
   updateMe: (payload: UserProfilePayload) => sendJson<{ user: AuthUser }>('/api/auth/me', 'PATCH', payload),
+  referral: () => getJson<{ referral: ReferralSummary }>('/api/auth/referral'),
   logout: () => postEmpty('/api/auth/logout'),
   options: () => getJson<Options>('/api/options'),
   dailyChecklist: () => getJson<DailyChecklistItem[]>('/api/daily-checklist'),

frontend/src/styles/main.css

@@ -4220,6 +4220,12 @@ button:disabled,
   background: color-mix(in srgb, var(--danger) 10%, var(--surface));
 }
 
+.auth-field-note {
+  color: var(--muted);
+  font-size: 13px;
+  font-weight: 750;
+}
+
 .profile-page {
   display: grid;
   gap: 18px;
@@ -4247,6 +4253,10 @@ button:disabled,
   align-content: start;
 }
 
+.profile-card--referral {
+  grid-column: 2;
+}
+
 .profile-identity {
   display: grid;
   grid-template-columns: auto minmax(0, 1fr);
@@ -4317,6 +4327,55 @@ button:disabled,
   cursor: default;
 }
 
+.profile-referral {
+  display: grid;
+  gap: 14px;
+}
+
+.profile-referral__metric {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 14px;
+  min-height: 58px;
+  padding: 12px 14px;
+  border: 1px solid var(--line);
+  border-radius: var(--radius-card);
+  background: var(--surface-soft);
+}
+
+.profile-referral__metric span {
+  color: var(--muted);
+  font-weight: 850;
+}
+
+.profile-referral__metric strong {
+  color: var(--pokemon-blue-deep);
+  font-family: var(--font-display);
+  font-size: 34px;
+  font-weight: 950;
+  line-height: 1;
+  font-variant-numeric: tabular-nums;
+}
+
+.profile-code-input {
+  color: var(--ink-soft);
+  font-family: var(--font-mono);
+  font-weight: 900;
+}
+
+.profile-referral-link-row {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto;
+  gap: 8px;
+  align-items: center;
+}
+
+.profile-referral-link-row .ui-button {
+  min-height: 44px;
+  white-space: nowrap;
+}
+
 .admin-layout {
   display: grid;
   grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
@@ -4647,6 +4706,10 @@ button:disabled,
     grid-template-columns: 1fr;
   }
 
+  .profile-card--referral {
+    grid-column: auto;
+  }
+
   .system-wording-sidebar {
     display: flex;
     overflow-x: auto;
@@ -4761,6 +4824,14 @@ button:disabled,
     grid-template-columns: 1fr;
   }
 
+  .profile-referral-link-row {
+    grid-template-columns: 1fr;
+  }
+
+  .profile-referral-link-row .ui-button {
+    width: 100%;
+  }
+
   .life-toolbar__actions,
   .life-toolbar .ui-button {
     width: 100%;

frontend/src/views/RegisterView.vue

@@ -2,14 +2,17 @@
 import { Icon } from '@iconify/vue';
 import { ref } from 'vue';
 import { useI18n } from 'vue-i18n';
+import { useRoute } from 'vue-router';
 import PageHeader from '../components/PageHeader.vue';
 import StatusMessage from '../components/StatusMessage.vue';
 import { iconMail } from '../icons';
 import { api } from '../services/api';
 
+const route = useRoute();
 const email = ref('');
 const displayName = ref('');
 const password = ref('');
+const referralCode = ref(typeof route.query.ref === 'string' ? route.query.ref.trim().toUpperCase() : '');
 const busy = ref(false);
 const message = ref('');
 const errorMessage = ref('');
@@ -24,7 +27,8 @@ async function submitRegister() {
     const response = await api.register({
       email: email.value,
       displayName: displayName.value,
-      password: password.value
+      password: password.value,
+      referralCode: referralCode.value
     });
     message.value = response.message;
   } catch (error) {
@@ -65,6 +69,19 @@ async function submitRegister() {
           />
         </div>
 
+        <div class="field">
+          <label for="register-referral-code">{{ t('auth.referralCode') }}</label>
+          <input
+            id="register-referral-code"
+            v-model="referralCode"
+            autocomplete="off"
+            inputmode="text"
+            maxlength="16"
+            :placeholder="t('auth.referralCodePlaceholder')"
+          />
+          <small class="auth-field-note">{{ t('auth.referralCodeHint') }}</small>
+        </div>
+
         <StatusMessage v-if="message" variant="success">{{ message }}</StatusMessage>
         <StatusMessage v-if="errorMessage" variant="danger">{{ errorMessage }}</StatusMessage>
 

frontend/src/views/UserProfileView.vue

@@ -6,16 +6,19 @@ import PageHeader from '../components/PageHeader.vue';
 import Skeleton from '../components/Skeleton.vue';
 import StatusBadge from '../components/StatusBadge.vue';
 import StatusMessage from '../components/StatusMessage.vue';
-import { iconProfile, iconSave } from '../icons';
+import { iconCopy, iconProfile, iconReferral, iconSave } from '../icons';
-import { api, notifyAuthChange, type AuthUser } from '../services/api';
+import { api, notifyAuthChange, type AuthUser, type ReferralSummary } from '../services/api';
 
 const { t } = useI18n();
 const user = ref<AuthUser | null>(null);
+const referral = ref<ReferralSummary | null>(null);
 const displayName = ref('');
 const loading = ref(true);
 const busy = ref(false);
 const message = ref('');
 const errorMessage = ref('');
+const referralMessage = ref('');
+const referralErrorMessage = ref('');
 
 const trimmedDisplayName = computed(() => displayName.value.trim());
 const hasChanges = computed(() => {
@@ -32,11 +35,21 @@ async function loadProfile() {
   loading.value = true;
   message.value = '';
   errorMessage.value = '';
+  referralMessage.value = '';
+  referralErrorMessage.value = '';
+  referral.value = null;
 
   try {
     const response = await api.me();
     user.value = response.user;
     displayName.value = response.user.displayName;
+
+    try {
+      const referralResponse = await api.referral();
+      referral.value = referralResponse.referral;
+    } catch {
+      referralErrorMessage.value = t('pages.profile.referralLoadFailed');
+    }
   } catch (error) {
     errorMessage.value = error instanceof Error && error.message ? error.message : t('errors.loadFailed');
   } finally {
@@ -67,6 +80,40 @@ async function saveProfile() {
   }
 }
 
+function writeClipboard(value: string): Promise<void> {
+  if (navigator.clipboard?.writeText) {
+    return navigator.clipboard.writeText(value);
+  }
+
+  const textarea = document.createElement('textarea');
+  textarea.value = value;
+  textarea.setAttribute('readonly', '');
+  textarea.style.position = 'fixed';
+  textarea.style.opacity = '0';
+  document.body.append(textarea);
+  textarea.select();
+  const copied = document.execCommand('copy');
+  textarea.remove();
+
+  return copied ? Promise.resolve() : Promise.reject(new Error('Clipboard unavailable'));
+}
+
+async function copyReferralLink() {
+  if (!referral.value) {
+    return;
+  }
+
+  referralMessage.value = '';
+  referralErrorMessage.value = '';
+
+  try {
+    await writeClipboard(referral.value.url);
+    referralMessage.value = t('pages.profile.referralCopied');
+  } catch {
+    referralErrorMessage.value = t('pages.profile.referralCopyFailed');
+  }
+}
+
 onMounted(() => {
   void loadProfile();
 });
@@ -102,6 +149,14 @@ onMounted(() => {
           <Skeleton variant="box" width="120px" height="42px" />
         </div>
       </section>
+      <section class="profile-card profile-card--referral" aria-hidden="true">
+        <Skeleton width="180px" height="28px" />
+        <div class="auth-form">
+          <Skeleton variant="box" height="58px" />
+          <Skeleton variant="box" height="44px" />
+          <Skeleton variant="box" width="120px" height="42px" />
+        </div>
+      </section>
     </div>
 
     <div v-else-if="user" class="profile-layout">
@@ -153,6 +208,42 @@ onMounted(() => {
           </button>
         </form>
       </section>
+
+      <section class="profile-card profile-card--referral" :aria-label="t('pages.profile.referralTitle')">
+        <div class="profile-card__header">
+          <Icon :icon="iconReferral" class="profile-card__icon" aria-hidden="true" />
+          <h2>{{ t('pages.profile.referralTitle') }}</h2>
+        </div>
+
+        <div v-if="referral" class="profile-referral">
+          <div class="profile-referral__metric">
+            <span>{{ t('pages.profile.verifiedReferralCount') }}</span>
+            <strong>{{ referral.verifiedReferralCount }}</strong>
+          </div>
+
+          <div class="field">
+            <label for="profile-referral-code">{{ t('pages.profile.referralCode') }}</label>
+            <input id="profile-referral-code" class="profile-readonly-input profile-code-input" :value="referral.code" readonly />
+          </div>
+
+          <div class="field">
+            <label for="profile-referral-url">{{ t('pages.profile.referralUrl') }}</label>
+            <div class="profile-referral-link-row">
+              <input id="profile-referral-url" class="profile-readonly-input" :value="referral.url" readonly />
+              <button class="ui-button ui-button--blue" type="button" @click="copyReferralLink">
+                <Icon :icon="iconCopy" class="ui-icon" aria-hidden="true" />
+                {{ t('pages.profile.copyReferralLink') }}
+              </button>
+            </div>
+            <small class="profile-field-note">{{ t('pages.profile.referralHint') }}</small>
+          </div>
+
+          <StatusMessage v-if="referralMessage" variant="success">{{ referralMessage }}</StatusMessage>
+          <StatusMessage v-if="referralErrorMessage" variant="danger">{{ referralErrorMessage }}</StatusMessage>
+        </div>
+
+        <StatusMessage v-else-if="referralErrorMessage" variant="danger" :duration="0">{{ referralErrorMessage }}</StatusMessage>
+      </section>
     </div>
 
     <StatusMessage v-else-if="errorMessage" variant="danger" :duration="0">{{ errorMessage }}</StatusMessage>

system-wordings.ts

@@ -70,6 +70,9 @@ export const systemWordingMessages = {
       newPassword: 'New password',
       confirmPassword: 'Confirm password',
       displayName: 'Display name',
+      referralCode: 'Referral code',
+      referralCodePlaceholder: 'Optional code',
+      referralCodeHint: 'Use an invite code from another trainer.',
       loginTitle: 'Log in',
       loginSubtitle: 'Use a verified email to enter Pokopia Wiki.',
       loggingIn: 'Logging in',
@@ -121,7 +124,16 @@ export const systemWordingMessages = {
         emailVerified: 'Email verified',
         emailUnverified: 'Email unverified',
         saved: 'Profile saved',
-        saveFailed: 'Profile save failed'
+        saveFailed: 'Profile save failed',
+        referralTitle: 'Referral',
+        referralCode: 'Referral code',
+        referralUrl: 'Invite link',
+        referralHint: 'Share this link with new editors. Invites count after email verification.',
+        verifiedReferralCount: 'Verified invites',
+        copyReferralLink: 'Copy link',
+        referralCopied: 'Referral link copied',
+        referralCopyFailed: 'Referral link copy failed',
+        referralLoadFailed: 'Referral details failed to load'
       },
       pokemon: {
         title: 'Pokemon',
@@ -578,7 +590,8 @@ export const systemWordingMessages = {
       passwordResetComplete: 'Password updated. You can log in with the new password.',
       invalidCredentials: 'Email or password is incorrect',
       verifyEmailFirst: 'Please complete email verification first',
-      invalidResetToken: 'The password reset link is invalid or expired'
+      invalidResetToken: 'The password reset link is invalid or expired',
+      invalidReferralCode: 'Referral code is invalid'
     },
     validation: {
       nameRequired: 'Name is required',
@@ -723,6 +736,9 @@ export const systemWordingMessages = {
       newPassword: '新密码',
       confirmPassword: '确认密码',
       displayName: '显示名',
+      referralCode: '邀请码',
+      referralCodePlaceholder: '可选邀请码',
+      referralCodeHint: '可填写其他训练师分享的邀请码。',
       loginTitle: '登录',
       loginSubtitle: '使用已验证邮箱进入 Pokopia Wiki',
       loggingIn: '登录中',
@@ -774,7 +790,16 @@ export const systemWordingMessages = {
         emailVerified: '邮箱已验证',
         emailUnverified: '邮箱未验证',
         saved: '个人资料已保存',
-        saveFailed: '个人资料保存失败'
+        saveFailed: '个人资料保存失败',
+        referralTitle: '邀请',
+        referralCode: '邀请码',
+        referralUrl: '邀请链接',
+        referralHint: '分享给新编辑者，对方完成邮箱验证后会计入有效邀请。',
+        verifiedReferralCount: '有效邀请',
+        copyReferralLink: '复制链接',
+        referralCopied: '邀请链接已复制',
+        referralCopyFailed: '邀请链接复制失败',
+        referralLoadFailed: '邀请信息加载失败'
       },
       pokemon: {
         title: 'Pokemon',
@@ -1231,7 +1256,8 @@ export const systemWordingMessages = {
         passwordResetComplete: '密码已更新，请使用新密码登录。',
         invalidCredentials: '邮箱或密码不正确',
         verifyEmailFirst: '请先完成邮箱验证',
-        invalidResetToken: '密码重置链接无效或已过期'
+        invalidResetToken: '密码重置链接无效或已过期',
+        invalidReferralCode: '邀请码无效'
       },
       validation: {
         nameRequired: '请输入名称',