restore: roll back to 7d854ff (stable pre-security state)

Full restore of the 7d854ff snapshot (2026-06-16 18:05, before the security
review). Forward commit, no history rewrite — f8a1310 and all later commits
remain recoverable in history.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app/Models/User.php

@@ -20,11 +20,10 @@ class User extends Authenticatable
      * @var list<string>
      */
     protected $fillable = [
-        'name',
-        'email',
-        'password', // Intentionally kept: required for registration factory and seeding.
-                    // Sensitive — never pass unvalidated user input directly.
-                    // email_verified_at and remember_token are intentionally excluded.
+        'name', 'title', 'first_name', 'last_name',
+        'email', 'password',
+        'status', 'valid_from', 'valid_until',
+        'company_id', 'phone', 'address', 'notes',
     ];
 
     /**
@@ -46,9 +45,16 @@ class User extends Authenticatable
     {
         return [
             'email_verified_at' => 'datetime',
-            'password' => 'hashed',
+            'password'          => 'hashed',
+            'valid_from'        => 'date',
+            'valid_until'       => 'date',
         ];
     }
+
+    public function company()
+    {
+        return $this->belongsTo(\App\Models\Company::class);
+    }
     // Many-to-many with projects
     public function projects()
     {