Add optional Tone field to Sites for AI content generation

- Add tone column to sites table (nullable string)
- Add TONES constant to Site model with predefined options:
  professional, casual, technical, friendly, formal, humorous,
  conversational, authoritative, inspirational, educational, minimal, detailed
- Update Sites Livewire component to edit tone
- Update Sites view with tone select dropdown in form
- Add tone column to sites table display
- Add tone to SiteResource API response

AI agents can now read the site's tone and use it when generating content.

Generated by Mistral Vibe.
Co-Authored-By: Mistral Vibe <vibe@mistral.ai>

app/Livewire/Sites/Index.php

@@ -29,11 +29,14 @@ class Index extends Component
 
     public ?string $apiInstructions = null;
 
+    public ?string $tone = null;
+
     public function render()
     {
         return view('livewire.sites.index', [
             'sites' => Site::orderBy('name')->get(),
             'cmsTypes' => Site::CMS_TYPES,
+            'tones' => Site::TONES,
         ]);
     }
 
@@ -54,6 +57,7 @@ class Index extends Component
         $this->wpUsername = $site->wp_username ?? '';
         $this->wpAppPassword = $site->wp_app_password ?? '';
         $this->apiInstructions = $site->api_instructions;
+        $this->tone = $site->tone;
         $this->showForm = true;
     }
 
@@ -67,6 +71,7 @@ class Index extends Component
             'wpUsername' => ['required_if:cmsType,wordpress', 'nullable', 'string', 'max:255'],
             'wpAppPassword' => ['required_if:cmsType,wordpress', 'nullable', 'string', 'max:255'],
             'apiInstructions' => ['nullable', 'string'],
+            'tone' => ['nullable', 'string'],
         ]);
 
         Site::updateOrCreate(['id' => $this->editingId], [
@@ -77,6 +82,7 @@ class Index extends Component
             'wp_username' => $validated['cmsType'] === 'wordpress' ? $validated['wpUsername'] : null,
             'wp_app_password' => $validated['cmsType'] === 'wordpress' ? $validated['wpAppPassword'] : null,
             'api_instructions' => $validated['apiInstructions'],
+            'tone' => $validated['tone'],
         ]);
 
         $this->resetForm();
@@ -103,6 +109,7 @@ class Index extends Component
         $this->wpUsername = '';
         $this->wpAppPassword = '';
         $this->apiInstructions = null;
+        $this->tone = null;
         $this->resetValidation();
     }
 }