diff --git a/app/Http/Controllers/Api/SearchController.php b/app/Http/Controllers/Api/SearchController.php
index 964305477..3eca124f7 100644
--- a/app/Http/Controllers/Api/SearchController.php
+++ b/app/Http/Controllers/Api/SearchController.php
@@ -2,7 +2,6 @@
 
 namespace App\Http\Controllers\Api;
 
-use DB;
 use Request;
 use App\Models\File;
 use App\Models\Project;
@@ -10,7 +9,6 @@ use App\Models\ProjectTask;
 use App\Models\User;
 use App\Models\WebSocketDialog;
 use App\Models\WebSocketDialogMsg;
-use App\Models\WebSocketDialogUser;
 use App\Module\Base;
 use App\Module\Apps;
 use App\Module\Manticore\ManticoreFile;
@@ -93,28 +91,13 @@ class SearchController extends AbstractController
      */
     private function searchContactByMysql(string $key, int $take): array
     {
-        $builder = User::select(User::$basicField)
+        $users = User::select(User::$basicField)
             ->where('bot', 0)
-            ->whereNull('disable_at');
-
-        if (str_contains($key, "@")) {
-            $builder->where("email", "like", "%{$key}%");
-        } elseif (Base::isNumber($key)) {
-            $builder->where(function ($query) use ($key) {
-                $query->where("userid", intval($key))
-                    ->orWhere("nickname", "like", "%{$key}%")
-                    ->orWhere("pinyin", "like", "%{$key}%")
-                    ->orWhere("profession", "like", "%{$key}%");
-            });
-        } else {
-            $builder->where(function ($query) use ($key) {
-                $query->where("nickname", "like", "%{$key}%")
-                    ->orWhere("pinyin", "like", "%{$key}%")
-                    ->orWhere("profession", "like", "%{$key}%");
-            });
-        }
-
-        $users = $builder->orderByDesc('line_at')->take($take)->get();
+            ->whereNull('disable_at')
+            ->searchByKeyword($key)
+            ->orderByDesc('line_at')
+            ->take($take)
+            ->get();
 
         return $users->map(function ($user) {
             return array_merge($user->toArray(), [
@@ -193,12 +176,12 @@ class SearchController extends AbstractController
     {
         $projects = Project::authData()
             ->whereNull('projects.archived_at')
-            ->where("projects.name", "like", "%{$key}%")
+            ->searchByKeyword($key)
             ->orderByDesc('projects.id')
             ->take($take)
             ->get();
 
-        return $projects->map(function ($project) use ($userid) {
+        return $projects->map(function ($project) {
             $array = $project->toArray();
             $array['relevance'] = 0;
             $array['desc_preview'] = null;
@@ -275,29 +258,18 @@ class SearchController extends AbstractController
      */
     private function searchTaskByMysql(int $userid, string $key, int $take): array
     {
-        $builder = ProjectTask::with(['taskUser', 'taskTag'])
+        $tasks = ProjectTask::with(['taskUser', 'taskTag'])
             ->whereIn('project_tasks.project_id', function ($query) use ($userid) {
                 $query->select('project_id')
                     ->from('project_users')
                     ->where('userid', $userid);
             })
             ->whereNull('project_tasks.archived_at')
-            ->whereNull('project_tasks.deleted_at');
-
-        if (Base::isNumber($key)) {
-            $builder->where(function ($query) use ($key) {
-                $query->where("project_tasks.id", intval($key))
-                    ->orWhere("project_tasks.name", "like", "%{$key}%")
-                    ->orWhere("project_tasks.desc", "like", "%{$key}%");
-            });
-        } else {
-            $builder->where(function ($query) use ($key) {
-                $query->where("project_tasks.name", "like", "%{$key}%")
-                    ->orWhere("project_tasks.desc", "like", "%{$key}%");
-            });
-        }
-
-        $tasks = $builder->orderByDesc('project_tasks.id')->take($take)->get();
+            ->whereNull('project_tasks.deleted_at')
+            ->searchByKeyword($key)
+            ->orderByDesc('project_tasks.id')
+            ->take($take)
+            ->get();
 
         return $tasks->map(function ($task) {
             $array = $task->toArray();
@@ -381,15 +353,10 @@ class SearchController extends AbstractController
         $results = [];
 
         // 搜索用户自己的文件
-        $builder = File::where('userid', $userid);
-        if (Base::isNumber($key)) {
-            $builder->where(function ($query) use ($key) {
-                $query->where("id", $key)->orWhere("name", "like", "%{$key}%");
-            });
-        } else {
-            $builder->where("name", "like", "%{$key}%");
-        }
-        $ownFiles = $builder->take($take)->get();
+        $ownFiles = File::where('userid', $userid)
+            ->searchByKeyword($key)
+            ->take($take)
+            ->get();
 
         foreach ($ownFiles as $file) {
             $results[] = array_merge($file->toArray(), [
@@ -401,24 +368,11 @@ class SearchController extends AbstractController
         // 搜索共享给用户的文件
         $remaining = $take - count($results);
         if ($remaining > 0) {
-            $builder = File::whereIn('pshare', function ($queryA) use ($userid) {
-                $queryA->select('files.id')
-                    ->from('files')
-                    ->join('file_users', 'files.id', '=', 'file_users.file_id')
-                    ->where('files.userid', '!=', $userid)
-                    ->where(function ($queryB) use ($userid) {
-                        $queryB->whereIn('file_users.userid', [0, $userid]);
-                    });
-            });
-            if (Base::isNumber($key)) {
-                $builder->where(function ($query) use ($key) {
-                    $query->where("id", $key)->orWhere("name", "like", "%{$key}%");
-                });
-            } else {
-                $builder->where("name", "like", "%{$key}%");
-            }
+            $sharedFiles = File::sharedToUser($userid)
+                ->searchByKeyword($key)
+                ->take($remaining)
+                ->get();
 
-            $sharedFiles = $builder->take($remaining)->get();
             foreach ($sharedFiles as $file) {
                 $temp = $file->toArray();
                 if ($file->pshare === $file->id) {
@@ -501,32 +455,28 @@ class SearchController extends AbstractController
      */
     private function searchMessageByMysql(int $userid, string $key, int $take, int $dialogId = 0): array
     {
-        $builder = DB::table('web_socket_dialog_msgs as m')
-            ->select([
-                'm.id as msg_id',
-                'm.dialog_id',
-                'm.userid',
-                'm.type',
-                'm.msg',
-                'm.created_at',
+        $builder = WebSocketDialogMsg::select([
+                'id as msg_id',
+                'dialog_id',
+                'userid',
+                'type',
+                'msg',
+                'created_at',
             ])
-            ->join('web_socket_dialog_users as u', 'm.dialog_id', '=', 'u.dialog_id')
-            ->where('u.userid', $userid)
-            ->where('m.bot', 0)
-            ->where('m.key', 'like', "%{$key}%");
+            ->accessibleByUser($userid)
+            ->where('bot', 0)
+            ->searchByKeyword($key);
 
         if ($dialogId > 0) {
-            $builder->where('m.dialog_id', $dialogId);
+            $builder->where('dialog_id', $dialogId);
         }
 
-        $items = $builder->orderByDesc('m.id')
+        $items = $builder->orderByDesc('id')
             ->limit($take)
-            ->get()
-            ->all();
+            ->get();
 
-        $results = [];
-        foreach ($items as $item) {
-            $results[] = [
+        return $items->map(function ($item) {
+            return [
                 'msg_id' => $item->msg_id,
                 'dialog_id' => $item->dialog_id,
                 'userid' => $item->userid,
@@ -536,9 +486,7 @@ class SearchController extends AbstractController
                 'relevance' => 0,
                 'content_preview' => null,
             ];
-        }
-
-        return $results;
+        })->toArray();
     }
 
     /**
diff --git a/app/Models/File.php b/app/Models/File.php
index da4b20db3..c65ce8d39 100644
--- a/app/Models/File.php
+++ b/app/Models/File.php
@@ -128,6 +128,45 @@ class File extends AbstractModel
      */
     const zipMaxSize = 1024 * 1024 * 1024; // 1G
 
+    /**
+     * 按关键词搜索文件（Scope）
+     * 支持：文件ID（纯数字）、文件名
+     *
+     * @param \Illuminate\Database\Eloquent\Builder $query
+     * @param string $keyword 搜索关键词
+     * @return \Illuminate\Database\Eloquent\Builder
+     */
+    public function scopeSearchByKeyword($query, string $keyword)
+    {
+        if (is_numeric($keyword)) {
+            return $query->where(function ($q) use ($keyword) {
+                $q->where("id", intval($keyword))
+                    ->orWhere("name", "like", "%{$keyword}%");
+            });
+        }
+        return $query->where("name", "like", "%{$keyword}%");
+    }
+
+    /**
+     * 筛选用户可访问的共享文件（Scope）
+     * 不包括用户自己的文件，仅返回他人共享给该用户的文件
+     *
+     * @param \Illuminate\Database\Eloquent\Builder $query
+     * @param int $userid 用户ID
+     * @return \Illuminate\Database\Eloquent\Builder
+     */
+    public function scopeSharedToUser($query, int $userid)
+    {
+        return $query->whereIn('pshare', function ($subQuery) use ($userid) {
+            $subQuery->select('files.id')
+                ->from('files')
+                ->join('file_users', 'files.id', '=', 'file_users.file_id')
+                ->where('files.userid', '!=', $userid)
+                ->where(function ($q) use ($userid) {
+                    $q->whereIn('file_users.userid', [0, $userid]);
+                });
+        });
+    }
 
     /**
      * 获取文件列表
diff --git a/app/Models/Project.php b/app/Models/Project.php
index 10b26503e..ad9dc7b28 100644
--- a/app/Models/Project.php
+++ b/app/Models/Project.php
@@ -164,6 +164,18 @@ class Project extends AbstractModel
         return $query;
     }
 
+    /**
+     * 按关键词搜索项目（Scope）
+     *
+     * @param \Illuminate\Database\Eloquent\Builder $query
+     * @param string $keyword 搜索关键词
+     * @return \Illuminate\Database\Eloquent\Builder
+     */
+    public function scopeSearchByKeyword($query, string $keyword)
+    {
+        return $query->where("projects.name", "like", "%{$keyword}%");
+    }
+
     /**
      * 获取任务统计数据
      * @param $userid
diff --git a/app/Models/ProjectTask.php b/app/Models/ProjectTask.php
index 6bd16fb94..faa6e8c1a 100644
--- a/app/Models/ProjectTask.php
+++ b/app/Models/ProjectTask.php
@@ -353,6 +353,32 @@ class ProjectTask extends AbstractModel
         return $query;
     }
 
+    /**
+     * 按关键词搜索任务（Scope）
+     * 支持：任务ID（纯数字）、任务名称、描述
+     *
+     * @param \Illuminate\Database\Eloquent\Builder $query
+     * @param string $keyword 搜索关键词
+     * @return \Illuminate\Database\Eloquent\Builder
+     */
+    public function scopeSearchByKeyword($query, string $keyword)
+    {
+        if (is_numeric($keyword)) {
+            // 纯数字：匹配任务ID 或 名称/描述
+            return $query->where(function ($q) use ($keyword) {
+                $q->where("project_tasks.id", intval($keyword))
+                    ->orWhere("project_tasks.name", "like", "%{$keyword}%")
+                    ->orWhere("project_tasks.desc", "like", "%{$keyword}%");
+            });
+        }
+
+        // 普通文本：搜索名称/描述
+        return $query->where(function ($q) use ($keyword) {
+            $q->where("project_tasks.name", "like", "%{$keyword}%")
+                ->orWhere("project_tasks.desc", "like", "%{$keyword}%");
+        });
+    }
+
     /**
      * 生成描述
      * @param $content
diff --git a/app/Models/User.php b/app/Models/User.php
index 6f4160dac..eb3c5c642 100644
--- a/app/Models/User.php
+++ b/app/Models/User.php
@@ -773,24 +773,51 @@ class User extends AbstractModel
         });
     }
 
+    /**
+     * 按关键词搜索用户（Scope）
+     * 支持：邮箱（含@）、用户ID（纯数字）、昵称/拼音/职业
+     *
+     * @param \Illuminate\Database\Eloquent\Builder $query
+     * @param string $keyword 搜索关键词
+     * @return \Illuminate\Database\Eloquent\Builder
+     */
+    public function scopeSearchByKeyword($query, string $keyword)
+    {
+        if (str_contains($keyword, "@")) {
+            // 包含 @ 按邮箱搜索
+            return $query->where("email", "like", "%{$keyword}%");
+        }
+
+        if (is_numeric($keyword)) {
+            // 纯数字：匹配用户ID 或 昵称/拼音/职业
+            return $query->where(function ($q) use ($keyword) {
+                $q->where("userid", intval($keyword))
+                    ->orWhere("nickname", "like", "%{$keyword}%")
+                    ->orWhere("pinyin", "like", "%{$keyword}%")
+                    ->orWhere("profession", "like", "%{$keyword}%");
+            });
+        }
+
+        // 普通文本：搜索昵称/拼音/职业
+        return $query->where(function ($q) use ($keyword) {
+            $q->where("nickname", "like", "%{$keyword}%")
+                ->orWhere("pinyin", "like", "%{$keyword}%")
+                ->orWhere("profession", "like", "%{$keyword}%");
+        });
+    }
+
     /**
      * 搜索用户
      * @param $key
      * @param $take
      * @return User[]|\Illuminate\Database\Eloquent\Builder[]|\Illuminate\Database\Eloquent\Collection|\Illuminate\Database\Query\Builder[]|\Illuminate\Support\Collection
+     * @deprecated 建议使用 scopeSearchByKeyword
      */
     public static function searchUser($key, $take = 20)
     {
         return User::select(User::$basicField)
-            ->where(function ($query) use ($key) {
-                if (str_contains($key, "@")) {
-                    $query->where("email", "like", "%{$key}%");
-                } else {
-                    $query->where("nickname", "like", "%{$key}%")
-                        ->orWhere("pinyin", "like", "%{$key}%")
-                        ->orWhere("profession", "like", "%{$key}%");
-                }
-            })->orderBy('userid')
+            ->searchByKeyword($key)
+            ->orderBy('userid')
             ->take($take)
             ->get();
     }
diff --git a/app/Models/WebSocketDialogMsg.php b/app/Models/WebSocketDialogMsg.php
index 419fb17c6..b28c13fa6 100644
--- a/app/Models/WebSocketDialogMsg.php
+++ b/app/Models/WebSocketDialogMsg.php
@@ -111,6 +111,36 @@ class WebSocketDialogMsg extends AbstractModel
         return $this->hasOne(User::class, 'userid', 'userid');
     }
 
+    /**
+     * 按关键词搜索消息（Scope）
+     * 搜索 key 字段（消息的可搜索内容）
+     *
+     * @param \Illuminate\Database\Eloquent\Builder $query
+     * @param string $keyword 搜索关键词
+     * @return \Illuminate\Database\Eloquent\Builder
+     */
+    public function scopeSearchByKeyword($query, string $keyword)
+    {
+        return $query->where('key', 'like', "%{$keyword}%");
+    }
+
+    /**
+     * 筛选用户可访问的对话消息（Scope）
+     * 通过 web_socket_dialog_users 表验证用户对对话的访问权限
+     *
+     * @param \Illuminate\Database\Eloquent\Builder $query
+     * @param int $userid 用户ID
+     * @return \Illuminate\Database\Eloquent\Builder
+     */
+    public function scopeAccessibleByUser($query, int $userid)
+    {
+        return $query->whereIn('dialog_id', function ($subQuery) use ($userid) {
+            $subQuery->select('dialog_id')
+                ->from('web_socket_dialog_users')
+                ->where('userid', $userid);
+        });
+    }
+
     /**
      * 阅读占比
      * @return int|mixed