功能：好友面板昵称后显示在线离线状态

后端：
- ChatStateService 新增 getAllOnlineUsernames()，跨房间聚合在线用户名
- FriendController::index() 为每位好友/待回加用户附加 is_online 字段
- 在线好友自动排在列表前面

前端：
- 昵称后显示 🟢 在线 / ⚫ 离线 徽标
- .fp-status-online 绿底绿字，.fp-status-offline 灰底灰字

app/Http/Controllers/FriendController.php

@@ -191,42 +191,49 @@ class FriendController extends Controller
         $myAddedNames = $myRows->keys();
         $addedMeNames = $addedMeRows->keys();
 
+        // ── 查询全局在线用户（所有房间合并）──
+        $onlineUsernames = collect($this->chatState->getAllOnlineUsernames());
+
         // 我添加的好友详情
         $friends = User::whereIn('username', $myAddedNames)
             ->get(['username', 'usersf', 'user_level', 'sex'])
-            ->map(function ($u) use ($myRows, $addedMeNames) {
+            ->map(function ($u) use ($myRows, $addedMeNames, $onlineUsernames) {
                 $row = $myRows->get($u->username);
 
                 return [
-                    'username' => $u->username,
+                    'username'   => $u->username,
-                    'headface' => $u->headface,
+                    'headface'   => $u->headface,
                     'user_level' => $u->user_level,
-                    'sex' => $u->sex,
+                    'sex'        => $u->sex,
-                    'mutual' => $addedMeNames->contains($u->username), // 是否互相添加
+                    'mutual'     => $addedMeNames->contains($u->username), // 是否互相添加
-                    'sub_time' => $row?->sub_time?->format('Y-m-d H:i') ?? '',
+                    'sub_time'   => $row?->sub_time?->format('Y-m-d H:i') ?? '',
+                    'is_online'  => $onlineUsernames->contains($u->username),
                 ];
             })
+            ->sortByDesc('is_online') // 在线好友排在前面
             ->values();
 
         // 对方加了我但我还未加的（pending）
         $pendingNames = $addedMeNames->diff($myAddedNames);
         $pending = User::whereIn('username', $pendingNames)
             ->get(['username', 'usersf', 'user_level', 'sex'])
-            ->map(function ($u) use ($addedMeRows) {
+            ->map(function ($u) use ($addedMeRows, $onlineUsernames) {
                 $row = $addedMeRows->get($u->username);
 
                 return [
-                    'username' => $u->username,
+                    'username'   => $u->username,
-                    'headface' => $u->headface,
+                    'headface'   => $u->headface,
                     'user_level' => $u->user_level,
-                    'sex' => $u->sex,
+                    'sex'        => $u->sex,
-                    'added_at' => $row?->sub_time?->format('Y-m-d H:i') ?? '',
+                    'added_at'   => $row?->sub_time?->format('Y-m-d H:i') ?? '',
+                    'is_online'  => $onlineUsernames->contains($u->username),
                 ];
             })
+            ->sortByDesc('is_online')
             ->values();
 
         return response()->json([
-            'status' => 'success',
+            'status'  => 'success',
             'friends' => $friends,
             'pending' => $pending,
         ]);

app/Services/ChatStateService.php

@@ -119,6 +119,28 @@ class ChatStateService
         return array_unique($roomIds);
     }
 
+    /**
+     * 获取全局所有在线用户名（跨所有房间，去重）。
+     *
+     * 遍历所有活跃房间，合并用户名后去重，
+     * 用于好友面板在线状态标记。
+     *
+     * @return array<string>
+     */
+    public function getAllOnlineUsernames(): array
+    {
+        $usernames = [];
+        foreach ($this->getAllActiveRoomIds() as $roomId) {
+            $key   = "room:{$roomId}:users";
+            $users = Redis::hkeys($key); // 只取 key（用户名），不取 value
+            foreach ($users as $username) {
+                $usernames[] = $username;
+            }
+        }
+
+        return array_unique($usernames);
+    }
+
     /**
      * 将一条新发言推入 Redis 列表，并限制最大保留数量，防止内存泄漏。
      *

resources/views/chat/partials/friend-panel.blade.php

@@ -221,6 +221,28 @@
         font-size: 12px;
         padding: 16px 0;
     }
+
+    /* 在线状态小圆点 */
+    .fp-status {
+        display: inline-flex;
+        align-items: center;
+        gap: 3px;
+        font-size: 10px;
+        font-weight: bold;
+        padding: 1px 6px;
+        border-radius: 10px;
+        flex-shrink: 0;
+    }
+
+    .fp-status-online {
+        background: #dcfce7;
+        color: #15803d;
+    }
+
+    .fp-status-offline {
+        background: #f1f5f9;
+        color: #94a3b8;
+    }
 </style>
 
 {{-- ════ HTML ════ --}}
@@ -400,6 +422,11 @@
             name.className = 'fp-name';
             name.textContent = f.username;
 
+            // 在线状态标记（映名后）
+            const status = document.createElement('span');
+            status.className = 'fp-status ' + (f.is_online ? 'fp-status-online' : 'fp-status-offline');
+            status.textContent = f.is_online ? '🟢 在线' : '⚫ 离线';
+
             const badge = document.createElement('span');
             badge.className = 'fp-badge ' + (f.mutual ? 'fp-badge-mutual' : 'fp-badge-onesided');
             badge.textContent = f.mutual ? '💚 互相好友' : '👤 单向关注';
@@ -413,7 +440,7 @@
             btn.textContent = '删除';
             btn.onclick = () => friendAction('remove', f.username, btn);
 
-            row.append(avatar, name, badge, date, btn);
+            row.append(avatar, name, status, badge, date, btn);
             return row;
         }
 
@@ -436,6 +463,11 @@
             name.className = 'fp-name';
             name.textContent = p.username;
 
+            // 在线状态标记
+            const status = document.createElement('span');
+            status.className = 'fp-status ' + (p.is_online ? 'fp-status-online' : 'fp-status-offline');
+            status.textContent = p.is_online ? '🟢 在线' : '⚫ 离线';
+
             const date = document.createElement('span');
             date.className = 'fp-date';
             date.textContent = p.added_at ? '他于 ' + p.added_at + ' 添加了我' : '';
@@ -445,7 +477,7 @@
             btn.textContent = '➕ 回加';
             btn.onclick = () => friendAction('add', p.username, btn);
 
-            row.append(avatar, name, date, btn);
+            row.append(avatar, name, status, date, btn);
             return row;
         }