feat: add multi-company Feishu integration and data migration

- Add companies table enhancements (abbr, tenant_key, feishu_enabled)
- Add users table enhancements (feishu fields, sn, report_to, etc.)
- Create company_feishu_apps table for multi-app per company
- Create user_sn_pool table for user number management
- Update FeishuService to support multiple Feishu apps per company
- Add data migration script (002_merge_old_data.sql)
- Add import script (scripts/import_old_data.php)
- Update User and Company models with new scopes and relationships
- Add CompanyFeishuApp model
- Add Git workflow documentation (GIT_WORKFLOW.md)

This supports:
- Multi-company architecture with Feishu integration
- Multiple Feishu apps per company (X-Server, Ticket, CRM)
- User number assignment system
- Data migration from old project

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/app/Model/User.php

@@ -6,26 +6,42 @@ use support\Model;
 
 class User extends Model
 {
-    protected $table = 'user';
+    protected $table = 'users';
 
     protected $fillable = [
         'company_id',
-        'feishu_user_id',
-        'feishu_union_id',
+        'sn',
+        'report_to',
         'name',
+        'avatar',
+        'sex',
         'email',
         'phone',
-        'avatar',
+        'password',
         'status',
+        'user_type',
+        'union_id',
+        'feishu_user_id',
+        'feishu_open_id',
+        'tenant_key',
+        'position',
+        'sign_img',
     ];
 
     protected $casts = [
         'company_id' => 'integer',
+        'report_to' => 'integer',
+        'sex' => 'integer',
         'status' => 'integer',
+        'user_type' => 'integer',
         'created_at' => 'datetime',
         'updated_at' => 'datetime',
     ];
 
+    protected $hidden = [
+        'password',
+    ];
+
     /**
      * 关联公司
      */
@@ -34,6 +50,22 @@ class User extends Model
         return $this->belongsTo(Company::class, 'company_id');
     }
 
+    /**
+     * 上级用户
+     */
+    public function parent()
+    {
+        return $this->belongsTo(User::class, 'report_to');
+    }
+
+    /**
+     * 下级用户
+     */
+    public function children()
+    {
+        return $this->hasMany(User::class, 'report_to');
+    }
+
     /**
      * 获取启用的用户
      */
@@ -42,19 +74,61 @@ class User extends Model
         return $query->where('status', 1);
     }
 
+    /**
+     * 根据公司ID查找
+     */
+    public function scopeByCompany($query, int $companyId)
+    {
+        return $query->where('company_id', $companyId);
+    }
+
     /**
      * 根据飞书用户ID查找
      */
-    public function scopeByFeishuUserId($query, string $feishuUserId)
+    public function scopeByFeishuUserId($query, ?string $feishuUserId)
     {
+        if ($feishuUserId === null) {
+            return $query;
+        }
         return $query->where('feishu_user_id', $feishuUserId);
     }
 
     /**
      * 根据飞书 UnionID 查找
      */
-    public function scopeByFeishuUnionId($query, string $feishuUnionId)
+    public function scopeByFeishuUnionId($query, ?string $feishuUnionId)
     {
-        return $query->where('feishu_union_id', $feishuUnionId);
+        if ($feishuUnionId === null) {
+            return $query;
+        }
+        return $query->where('union_id', $feishuUnionId);
+    }
+
+    /**
+     * 根据OpenID查找
+     */
+    public function scopeByFeishuOpenId($query, ?string $openId)
+    {
+        if ($openId === null) {
+            return $query;
+        }
+        return $query->where('feishu_open_id', $openId);
+    }
+
+    /**
+     * 搜索用户
+     */
+    public function scopeSearch($query, ?string $keyword)
+    {
+        if (!$keyword) {
+            return $query;
+        }
+
+        return $query->where(function ($q) use ($keyword) {
+            $q->where('name', 'like', "%{$keyword}%")
+                ->orWhere('email', 'like', "%{$keyword}%")
+                ->orWhere('phone', 'like', "%{$keyword}%")
+                ->orWhere('sn', 'like', "%{$keyword}%");
+        });
     }
 }