feat: multi-tenant SaaS implementation - admin interface, tenant isolation, and UI updates

app/Models/User.php

@@ -10,7 +10,7 @@ use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Foundation\Auth\User as Authenticatable;
 use Illuminate\Notifications\Notifiable;
 
-#[Fillable(['name', 'email', 'password', 'role'])]
+#[Fillable(['name', 'email', 'password', 'role', 'tenant_id'])]
 #[Hidden(['password', 'remember_token'])]
 class User extends Authenticatable
 {
@@ -19,7 +19,12 @@ class User extends Authenticatable
 
     public function isAdmin(): bool
     {
-        return $this->role === 'admin';
+        return in_array($this->role, ['admin', 'super_admin']);
+    }
+
+    public function isSuperAdmin(): bool
+    {
+        return $this->role === 'super_admin';
     }
 
     public function isCandidate(): bool
@@ -32,6 +37,11 @@ class User extends Authenticatable
         return $this->hasOne(Candidate::class);
     }
 
+    public function tenant()
+    {
+        return $this->belongsTo(Tenant::class);
+    }
+
     /**
      * Get the attributes that should be cast.
      *