feat(organisation): add contact fields to model and API

Add contact_name, contact_email, phone, website columns. Wire the new
fields through the Organisation model, update request validation,
response resource, and the TypeScript Organisation interface. Needed by
the upcoming dashboard + form-builder binding registry.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

api/app/Http/Requests/Api/V1/UpdateOrganisationRequest.php

@@ -23,6 +23,10 @@ final class UpdateOrganisationRequest extends FormRequest
                 'sometimes', 'string', 'max:255', 'regex:/^[a-z0-9-]+$/',
                 Rule::unique('organisations', 'slug')->ignore($this->route('organisation')),
             ],
+            'contact_name' => ['sometimes', 'nullable', 'string', 'max:255'],
+            'contact_email' => ['sometimes', 'nullable', 'email', 'max:255'],
+            'phone' => ['sometimes', 'nullable', 'string', 'max:255'],
+            'website' => ['sometimes', 'nullable', 'url', 'max:255'],
             'settings' => ['sometimes', 'array'],
             'email_logo_url' => ['nullable', 'url', 'max:500'],
             'email_primary_color' => ['nullable', 'string', 'regex:/^#[0-9A-Fa-f]{6}$/'],

api/app/Http/Resources/Api/V1/OrganisationResource.php

@@ -15,6 +15,10 @@ final class OrganisationResource extends JsonResource
             'id' => $this->id,
             'name' => $this->name,
             'slug' => $this->slug,
+            'contact_name' => $this->contact_name,
+            'contact_email' => $this->contact_email,
+            'phone' => $this->phone,
+            'website' => $this->website,
             'billing_status' => $this->billing_status,
             'settings' => $this->settings,
             'email_logo_url' => $this->email_logo_url,

api/app/Models/Organisation.php

@@ -21,6 +21,10 @@ final class Organisation extends Model
     protected $fillable = [
         'name',
         'slug',
+        'contact_name',
+        'contact_email',
+        'phone',
+        'website',
         'billing_status',
         'settings',
         'email_logo_url',