diff --git a/backend/pb_migrations/1776487854_updated_users.js b/backend/pb_migrations/1776487854_updated_users.js
new file mode 100644
index 0000000..d8f7c32
--- /dev/null
+++ b/backend/pb_migrations/1776487854_updated_users.js
@@ -0,0 +1,36 @@
+/// <reference path="../pb_data/types.d.ts" />
+migrate((db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("_pb_users_auth_")
+
+  collection.options = {
+    "allowEmailAuth": true,
+    "allowOAuth2Auth": true,
+    "allowUsernameAuth": true,
+    "exceptEmailDomains": null,
+    "manageRule": null,
+    "minPasswordLength": 6,
+    "onlyEmailDomains": null,
+    "onlyVerified": false,
+    "requireEmail": false
+  }
+
+  return dao.saveCollection(collection)
+}, (db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("_pb_users_auth_")
+
+  collection.options = {
+    "allowEmailAuth": true,
+    "allowOAuth2Auth": true,
+    "allowUsernameAuth": true,
+    "exceptEmailDomains": null,
+    "manageRule": null,
+    "minPasswordLength": 8,
+    "onlyEmailDomains": null,
+    "onlyVerified": false,
+    "requireEmail": false
+  }
+
+  return dao.saveCollection(collection)
+})
diff --git a/backend/pb_migrations/1776490303_updated_users.js b/backend/pb_migrations/1776490303_updated_users.js
new file mode 100644
index 0000000..ff37c5c
--- /dev/null
+++ b/backend/pb_migrations/1776490303_updated_users.js
@@ -0,0 +1,18 @@
+/// <reference path="../pb_data/types.d.ts" />
+migrate((db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("_pb_users_auth_")
+
+  collection.listRule = ""
+  collection.viewRule = ""
+
+  return dao.saveCollection(collection)
+}, (db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("_pb_users_auth_")
+
+  collection.listRule = "@request.auth.id != \"\""
+  collection.viewRule = "@request.auth.id != \"\""
+
+  return dao.saveCollection(collection)
+})
diff --git a/backend/pb_migrations/1776490365_updated_users.js b/backend/pb_migrations/1776490365_updated_users.js
new file mode 100644
index 0000000..ff37c5c
--- /dev/null
+++ b/backend/pb_migrations/1776490365_updated_users.js
@@ -0,0 +1,18 @@
+/// <reference path="../pb_data/types.d.ts" />
+migrate((db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("_pb_users_auth_")
+
+  collection.listRule = ""
+  collection.viewRule = ""
+
+  return dao.saveCollection(collection)
+}, (db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("_pb_users_auth_")
+
+  collection.listRule = "@request.auth.id != \"\""
+  collection.viewRule = "@request.auth.id != \"\""
+
+  return dao.saveCollection(collection)
+})
diff --git a/backend/pb_migrations/1776500005_created_notifications.js b/backend/pb_migrations/1776500005_created_notifications.js
index 9bbe3fd..7d8bf6c 100644
--- a/backend/pb_migrations/1776500005_created_notifications.js
+++ b/backend/pb_migrations/1776500005_created_notifications.js
@@ -106,7 +106,7 @@ migrate((db) => {
     "indexes": [],
     "listRule": "user = @request.auth.id",
     "viewRule": "user = @request.auth.id",
-    "createRule": "@request.auth.id != \"\" && user = @request.auth.id",
+    "createRule": "@request.auth.id != \"\"",
     "updateRule": "user = @request.auth.id",
     "deleteRule": "user = @request.auth.id",
     "options": {}
diff --git a/backend/pb_migrations/1776508472_updated_notifications.js b/backend/pb_migrations/1776508472_updated_notifications.js
new file mode 100644
index 0000000..ddbd55b
--- /dev/null
+++ b/backend/pb_migrations/1776508472_updated_notifications.js
@@ -0,0 +1,16 @@
+/// <reference path="../pb_data/types.d.ts" />
+migrate((db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("s63vtbeeqlv1xzu")
+
+  collection.createRule = "@request.auth.id != \"\""
+
+  return dao.saveCollection(collection)
+}, (db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("s63vtbeeqlv1xzu")
+
+  collection.createRule = "@request.auth.id != \"\" && user = @request.auth.id"
+
+  return dao.saveCollection(collection)
+})
diff --git a/frontend/src/api/invitations.ts b/frontend/src/api/invitations.ts
index 48429bd..e500069 100644
--- a/frontend/src/api/invitations.ts
+++ b/frontend/src/api/invitations.ts
@@ -111,6 +111,27 @@ export async function respondInvitation(
 
   // 更新邀请状态
   await pb.collection('invitations').update(invitationId, updateData)
+
+  // 通知邀请发起人
+  try {
+    const invitation = await pb.collection('invitations').getOne(invitationId, {
+      expand: 'teamSession',
+      $autoCancel: false,
+    }) as any
+    const { createNotification } = await import('./notifications')
+    await createNotification({
+      user: invitation.from,
+      type: response === 'rejected' ? 'team_invite' : 'team_invite',
+      title: response === 'rejected' ? '邀请被拒绝' : '邀请已接受',
+      content: response === 'rejected'
+        ? (rejectReason || '对方拒绝了组队邀请')
+        : '对方已接受组队邀请',
+      relatedId: invitation.teamSession,
+      relatedType: 'team',
+    })
+  } catch {
+    // 通知失败不影响主流程
+  }
 }
 
 // 订阅邀请变更
diff --git a/frontend/src/api/polls.ts b/frontend/src/api/polls.ts
index 31630c2..19b0594 100644
--- a/frontend/src/api/polls.ts
+++ b/frontend/src/api/polls.ts
@@ -1,5 +1,6 @@
 import { pb } from './pocketbase'
 import { awardPoints, deductPoints } from './points'
+import { createNotification } from './notifications'
 import type { Poll, PollOption, PollVote } from '@/types'
 
 export async function createPoll(data: {
@@ -33,6 +34,27 @@ export async function createPoll(data: {
     })
   }
 
+  // 给同群组其他成员发送通知
+  try {
+    const group = await pb.collection('groups').getOne(data.group)
+    const typeLabel = data.type === 'rollcall' ? '接龙报名' : '投票'
+    const otherMembers = (group.members || []).filter((id: string) => id !== user.id)
+    await Promise.all(
+      otherMembers.map((memberId: string) =>
+        createNotification({
+          user: memberId,
+          type: 'poll_new',
+          title: `新${typeLabel}`,
+          content: `${data.title}`,
+          relatedId: poll.id,
+          relatedType: 'poll',
+        })
+      )
+    )
+  } catch {
+    // 通知发送失败不影响主流程
+  }
+
   return poll as unknown as Poll
 }
 
diff --git a/frontend/src/components/common/NotificationPanel.vue b/frontend/src/components/common/NotificationPanel.vue
index 59dde6a..3b65cd3 100644
--- a/frontend/src/components/common/NotificationPanel.vue
+++ b/frontend/src/components/common/NotificationPanel.vue
@@ -1,13 +1,17 @@
 <script setup lang="ts">
 import { onMounted } from 'vue'
+import { useRouter } from 'vue-router'
 import { useNotificationStore } from '@/stores/notification'
 import InvitationCard from '@/components/team/InvitationCard.vue'
 import JoinRequestCard from '@/components/group/JoinRequestCard.vue'
+import { pb } from '@/api/pocketbase'
 
 const store = useNotificationStore()
+const router = useRouter()
 
 onMounted(() => {
   store.loadPendingInvitations()
+  store.loadAppNotifications()
 })
 
 function onInvitationResponded(id: string, _accepted: boolean) {
@@ -17,6 +21,27 @@ function onInvitationResponded(id: string, _accepted: boolean) {
 function onJoinRequestResponded(id: string) {
   store.removeJoinRequest(id)
 }
+
+async function handleNotificationClick(n: { id: string; read: boolean; relatedType?: string; relatedId?: string }) {
+  if (!n.read) store.markRead(n.id)
+
+  if (n.relatedType === 'poll' && n.relatedId) {
+    try {
+      const poll = await pb.collection('polls').getOne(n.relatedId, { $autoCancel: false })
+      store.showPanel = false
+      router.push({ name: 'GroupView', params: { id: poll.group }, query: { tab: 'polls' } })
+    } catch { /* ignore */ }
+  } else if (n.relatedType === 'team' && n.relatedId) {
+    try {
+      const session = await pb.collection('team_sessions').getOne(n.relatedId, { $autoCancel: false })
+      store.showPanel = false
+      router.push({ name: 'GroupView', params: { id: session.sourceGroup } })
+    } catch { /* ignore */ }
+  } else if (n.relatedType === 'group' && n.relatedId) {
+    store.showPanel = false
+    router.push({ name: 'GroupView', params: { id: n.relatedId } })
+  }
+}
 </script>
 
 <template>
@@ -56,6 +81,29 @@ function onJoinRequestResponded(id: string) {
             />
           </div>
         </div>
+
+        <!-- 站内通知 -->
+        <div v-if="store.appNotifications.length > 0" class="section">
+          <div class="section-header">
+            <h4 class="section-title">消息通知</h4>
+            <button v-if="store.appUnreadCount > 0" class="mark-all-btn" @click="store.markAllRead">
+              全部已读
+            </button>
+          </div>
+          <div class="list">
+            <div
+              v-for="n in store.appNotifications"
+              :key="n.id"
+              class="app-notification"
+              :class="{ unread: !n.read }"
+              @click="handleNotificationClick(n)"
+            >
+              <div class="notif-title">{{ n.title }}</div>
+              <div v-if="n.content" class="notif-content">{{ n.content }}</div>
+              <div class="notif-time">{{ new Date(n.created).toLocaleString('zh-CN') }}</div>
+            </div>
+          </div>
+        </div>
       </template>
     </div>
   </el-drawer>
@@ -76,11 +124,30 @@ function onJoinRequestResponded(id: string) {
   margin-bottom: 20px;
 }
 
+.section-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 10px;
+}
+
 .section-title {
   font-size: 13px;
   font-weight: 600;
   color: var(--gg-text-secondary);
-  margin: 0 0 10px;
+  margin: 0;
+}
+
+.mark-all-btn {
+  border: none;
+  background: none;
+  color: var(--gg-primary);
+  font-size: 12px;
+  cursor: pointer;
+}
+
+.mark-all-btn:hover {
+  opacity: 0.8;
 }
 
 .list {
@@ -88,4 +155,39 @@ function onJoinRequestResponded(id: string) {
   flex-direction: column;
   gap: 10px;
 }
+
+.app-notification {
+  padding: 12px 14px;
+  border-radius: var(--gg-radius-sm);
+  border: 1px solid var(--gg-border);
+  cursor: pointer;
+  transition: background 0.2s;
+}
+
+.app-notification:hover {
+  background: var(--gg-bg-hover);
+}
+
+.app-notification.unread {
+  border-left: 3px solid var(--gg-primary);
+  background: rgba(5, 150, 105, 0.04);
+}
+
+.notif-title {
+  font-size: 14px;
+  font-weight: 500;
+  color: var(--gg-text);
+}
+
+.notif-content {
+  font-size: 13px;
+  color: var(--gg-text-secondary);
+  margin-top: 4px;
+}
+
+.notif-time {
+  font-size: 11px;
+  color: var(--gg-text-muted);
+  margin-top: 6px;
+}
 </style>
diff --git a/frontend/src/components/poll/CreatePollDialog.vue b/frontend/src/components/poll/CreatePollDialog.vue
index 18adbc8..f4b3ac5 100644
--- a/frontend/src/components/poll/CreatePollDialog.vue
+++ b/frontend/src/components/poll/CreatePollDialog.vue
@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { ref, computed } from 'vue'
 import { ElMessage } from 'element-plus'
+import { Plus } from '@element-plus/icons-vue'
 import { createPoll } from '@/api/polls'
 import { useGroupStore } from '@/stores/group'
 
@@ -166,14 +167,13 @@ function handleOpen() {
               删除
             </el-button>
           </div>
-          <el-button
+          <button
             v-if="canAddOption"
-            type="primary"
-            text
+            class="add-option-btn"
             @click="addOption"
           >
-            + 添加选项
-          </el-button>
+            <el-icon><Plus /></el-icon> 添加选项
+          </button>
         </div>
       </div>
 
@@ -208,9 +208,9 @@ function handleOpen() {
 
     <template #footer>
       <el-button @click="visible = false">取消</el-button>
-      <el-button type="primary" :loading="loading" @click="handleSubmit">
-        创建
-      </el-button>
+      <button class="submit-btn" :disabled="loading" @click="handleSubmit">
+        {{ loading ? '创建中...' : '创建' }}
+      </button>
     </template>
   </el-dialog>
 </template>
@@ -281,4 +281,44 @@ function handleOpen() {
 .option-item .el-input {
   flex: 1;
 }
+
+.add-option-btn {
+  display: flex;
+  align-items: center;
+  gap: 5px;
+  padding: 7px 16px;
+  border: none;
+  border-radius: var(--gg-radius-sm);
+  background: var(--gg-gradient-green);
+  color: #fff;
+  font-size: 13px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: opacity 0.2s;
+}
+
+.add-option-btn:hover {
+  opacity: 0.85;
+}
+
+.submit-btn {
+  padding: 8px 20px;
+  border: none;
+  border-radius: var(--gg-radius-sm);
+  background: var(--gg-gradient-green);
+  color: #fff;
+  font-size: 14px;
+  font-weight: 500;
+  cursor: pointer;
+  transition: opacity 0.2s;
+}
+
+.submit-btn:hover {
+  opacity: 0.85;
+}
+
+.submit-btn:disabled {
+  opacity: 0.6;
+  cursor: not-allowed;
+}
 </style>
diff --git a/frontend/src/views/Changelog.vue b/frontend/src/views/Changelog.vue
index aaff87f..e7bb064 100644
--- a/frontend/src/views/Changelog.vue
+++ b/frontend/src/views/Changelog.vue
@@ -10,6 +10,24 @@ interface LogEntry {
 }
 
 const logs = ref<LogEntry[]>([
+  {
+    version: 'v0.1.1',
+    date: '2026-04-18',
+    title: '二期功能优化',
+    items: [
+      { type: 'feat', text: '投票编辑：发起人可修改标题、选项、截止时间，已投票选项不可删除' },
+      { type: 'feat', text: '通知面板展示站内消息通知，支持投票/组队/群组通知跳转' },
+      { type: 'feat', text: '创建投票后自动通知同群组成员' },
+      { type: 'feat', text: '邀请被拒绝/接受后通知邀请发起人' },
+      { type: 'feat', text: '通知点击跳转到对应群组并切换到相关 Tab' },
+      { type: 'fix', text: '修复通知 createRule 权限限制导致无法给他人发送通知' },
+      { type: 'fix', text: '修复截止时间时区偏差，统一 ISO 格式存储' },
+      { type: 'fix', text: '修复投票列表 auto-cancel 竞态和选项 order=0 校验失败' },
+      { type: 'fix', text: '修复 nginx 静态缓存误拦截 API 文件请求和上传大小限制' },
+      { type: 'fix', text: '修复回忆 Tab 图片不展示和视频无法播放问题' },
+      { type: 'fix', text: '修复切换 Tab 数据不加载的时序问题' },
+    ]
+  },
   {
     version: 'v0.1.0',
     date: '2026-04-18',
diff --git a/frontend/src/views/GroupView.vue b/frontend/src/views/GroupView.vue
index c01d000..d3cdb0e 100644
--- a/frontend/src/views/GroupView.vue
+++ b/frontend/src/views/GroupView.vue
@@ -20,7 +20,7 @@ const route = useRoute()
 const groupStore = useGroupStore()
 const teamStore = useTeamStore()
 
-const activeTab = ref('activity')
+const activeTab = ref(route.query.tab === 'polls' ? 'polls' : route.query.tab === 'memories' ? 'memories' : route.query.tab === 'stats' ? 'stats' : 'activity')
 const viewingPollId = ref<string | null>(null)
 
 const unsubFns: (() => Promise<void>)[] = []