diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 2a3d7a5..7cbbae2 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -51,5 +51,24 @@ export default {
 </script>
 
 <style>
-/*每个页面公共css */
+/* 每个页面公共 css */
+
+/*
+ * 基础全屏容器：防止 uni-app H5 在大窗口下祖先容器尺寸小于视口
+ * 导致 position: fixed 元素（如会议房间 .room）"偏左上"。
+ * 同时让普通页面在桌面宽屏下仍能把内容区（.page / uni-page-body）
+ * 拉伸到视口高度，避免下方出现大片浏览器默认底色。
+ */
+/* #ifdef H5 */
+html, body, #app {
+  width: 100%;
+  height: 100%;
+  margin: 0;
+  padding: 0;
+}
+uni-app, uni-app > uni-page, uni-page-wrapper, uni-page-body {
+  width: 100%;
+  min-height: 100%;
+}
+/* #endif */
 </style>
diff --git a/frontend/src/api/meeting.js b/frontend/src/api/meeting.js
index e2a0637..5c377fb 100644
--- a/frontend/src/api/meeting.js
+++ b/frontend/src/api/meeting.js
@@ -25,8 +25,8 @@ const unwrap = (promise) => promise.then((resp) => (resp && 'data' in resp ? (re
  * @param {Object} payload - { title, password?, max_members? }
  * @returns {Promise<{ room: MeetingRoomDTO }>}
  */
-const createRoom = (payload) => {
-  return unwrap(post('/api/v1/meeting/rooms', payload))
+const createRoom = (payload, options = {}) => {
+  return unwrap(post('/api/v1/meeting/rooms', payload, options))
 }
 
 /**
@@ -44,17 +44,18 @@ const getRoom = (roomCode) => {
  * @param {Object} [payload] - { password? }
  * @returns {Promise<{ room, participant, router_id }>}
  */
-const joinRoom = (roomCode, payload = {}) => {
-  return unwrap(post(`/api/v1/meeting/rooms/${roomCode}/join`, payload))
+const joinRoom = (roomCode, payload = {}, options = {}) => {
+  return unwrap(post(`/api/v1/meeting/rooms/${roomCode}/join`, payload, options))
 }
 
 /**
  * 离开会议
  * @param {string} roomCode
+ * @param {Object} [options] - 请求层选项，如 { silent: true } 抑制失败 toast
  * @returns {Promise<{ duration }>}
  */
-const leaveRoom = (roomCode) => {
-  return unwrap(post(`/api/v1/meeting/rooms/${roomCode}/leave`))
+const leaveRoom = (roomCode, options = {}) => {
+  return unwrap(post(`/api/v1/meeting/rooms/${roomCode}/leave`, undefined, options))
 }
 
 /**
diff --git a/frontend/src/pages/meeting/room.vue b/frontend/src/pages/meeting/room.vue
index ebd7e61..b93e42f 100644
--- a/frontend/src/pages/meeting/room.vue
+++ b/frontend/src/pages/meeting/room.vue
@@ -530,12 +530,20 @@ onUnload(() => {
 
 <style scoped>
 .room {
+  /* 使用 fixed + 100vw/100vh 双重保险：
+     某些祖先（uni-page-wrapper）带 transform 时 fixed 会相对该祖先而非视口；
+     显式 100vw/100vh 可保证始终铺满整个浏览器窗口。 */
   position: fixed;
   inset: 0;
+  width: 100vw;
+  height: 100vh;
+  min-width: 100vw;
+  min-height: 100vh;
   display: flex;
   flex-direction: column;
   background: #0F172A;
   color: #F3F4F6;
+  z-index: 10;
 }
 
 .top-bar {
diff --git a/frontend/src/store/meeting.js b/frontend/src/store/meeting.js
index 9a13b21..8399baf 100644
--- a/frontend/src/store/meeting.js
+++ b/frontend/src/store/meeting.js
@@ -534,7 +534,8 @@ export const useMeetingStore = defineStore('meeting', () => {
     }
     localState.value = MEETING_LOCAL_STATE_JOINING
     try {
-      const resp = await meetingApi.createRoom(payload)
+      // 首次调用时抑制失败 toast：失败后若是 stale 残留会自动清理 + 重试，对用户无感
+      const resp = await meetingApi.createRoom(payload, _retried ? {} : { silent: true })
       currentRoom.value = resp.room
       routerID.value = resp.router_id || ''
       // 创建者 host participant 尚未通过 REST 返回，用本地 userStore 占位
@@ -573,7 +574,8 @@ export const useMeetingStore = defineStore('meeting', () => {
     }
     localState.value = MEETING_LOCAL_STATE_JOINING
     try {
-      const resp = await meetingApi.joinRoom(roomCode, { password })
+      // 首次调用时抑制失败 toast：失败后若是 stale 残留会自动清理 + 重试，对用户无感
+      const resp = await meetingApi.joinRoom(roomCode, { password }, _retried ? {} : { silent: true })
       currentRoom.value = resp.room
       currentParticipant.value = resp.participant
       routerID.value = resp.router_id || ''
@@ -769,7 +771,9 @@ export const useMeetingStore = defineStore('meeting', () => {
     const cleanedCodes = []
     for (const room of list) {
       try {
-        await meetingApi.leaveRoom(room.room_code)
+        // silent: true —— 清理流程中 leave 失败（如 "你不在此会议中"）
+        // 属于幂等预期错误，不应弹 toast 打扰用户
+        await meetingApi.leaveRoom(room.room_code, { silent: true })
         cleanedCodes.push(room.room_code)
       } catch (err) {
         _log('warn', '[Meeting] 清理遗留会议失败（忽略继续）', room.room_code, err)
diff --git a/frontend/src/utils/request.js b/frontend/src/utils/request.js
index 8c6dad6..6e032a2 100644
--- a/frontend/src/utils/request.js
+++ b/frontend/src/utils/request.js
@@ -31,9 +31,14 @@ const TIMEOUT = 15000
  * @param {Object} [options.params] - URL Query 参数
  * @param {Object} [options.header] - 自定义请求头
  * @param {boolean} [options.needAuth=true] - 是否需要自动附加 Token
+ * @param {boolean} [options.silent=false] - 是否抑制失败 toast（用于内部重试 / 清理等静默流程）
  * @returns {Promise<Object>} 响应中的 data 字段（已解包）
  */
 const request = (options) => {
+  const silent = options.silent === true
+  const toastIfNotSilent = (toast) => {
+    if (!silent) uni.showToast(toast)
+  }
   return new Promise((resolve, reject) => {
     // 构建请求头
     const header = {
@@ -66,7 +71,7 @@ const request = (options) => {
             resolve(data)
           } else {
             // code 非 0 表示业务逻辑错误
-            uni.showToast({
+            toastIfNotSilent({
               title: data.message || '请求失败',
               icon: 'none',
               duration: 2000
@@ -76,7 +81,7 @@ const request = (options) => {
         } else if (statusCode === 401) {
           const isAuthEndpoint = /\/auth\/(login|register)$/.test(options.url)
           const message = data?.message || '登录已过期，请重新登录'
-          uni.showToast({ title: message, icon: 'none', duration: 2000 })
+          toastIfNotSilent({ title: message, icon: 'none', duration: 2000 })
           if (!isAuthEndpoint) {
             removeToken()
             setTimeout(() => {
@@ -85,7 +90,7 @@ const request = (options) => {
           }
           reject({ code: 401, message })
         } else if (statusCode === 403) {
-          uni.showToast({
+          toastIfNotSilent({
             title: data.message || '没有访问权限',
             icon: 'none',
             duration: 2000
@@ -93,7 +98,7 @@ const request = (options) => {
           reject(data)
         } else {
           // 其他 HTTP 错误（400/404/500 等）
-          uni.showToast({
+          toastIfNotSilent({
             title: data.message || `请求错误 (${statusCode})`,
             icon: 'none',
             duration: 2000
@@ -103,7 +108,7 @@ const request = (options) => {
       },
       fail: (err) => {
         // 网络错误或请求超时
-        uni.showToast({
+        toastIfNotSilent({
           title: '网络异常，请检查网络连接',
           icon: 'none',
           duration: 2000