Add Post Templates feature

- Create templates table with name, body, type, title, target, placeholders
- Add Template model with applyToPost method for placeholder replacement
- Add Livewire Templates/Index component for CRUD operations
- Add templates index view with form and table
- Add /templates route
- Update Posts/Index to support template selection when creating posts
- Templates can be applied to pre-fill post form fields

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

app/Livewire/Posts/Index.php

@@ -6,6 +6,7 @@ use App\Jobs\PublishPostJob;
 use App\Models\Post;
 use App\Models\Site;
 use App\Models\SocialAccount;
+use App\Models\Template;
 use App\Support\Publishing\PublisherManager;
 use Livewire\Attributes\Layout;
 use Livewire\Component;
@@ -17,6 +18,8 @@ class Index extends Component
 
     public ?int $editingId = null;
 
+    public ?int $templateId = null;
+
     public string $siteId = '';
 
     public string $socialAccountId = '';
@@ -47,6 +50,7 @@ class Index extends Component
             'accounts' => SocialAccount::orderBy('username')->get(),
             'types' => Post::TYPES,
             'statuses' => Post::STATUSES,
+            'templates' => Template::orderBy('name')->get(),
             'hasPublishing' => $posts->contains('status', 'publishing'),
         ]);
     }
@@ -74,6 +78,37 @@ class Index extends Component
         $this->showForm = true;
     }
 
+    public function createFromTemplate(int $templateId): void
+    {
+        $template = Template::findOrFail($templateId);
+        
+        $this->resetForm();
+        $this->templateId = $template->id;
+        
+        // Pre-fill form from template
+        if ($template->type) {
+            $this->type = $template->type;
+        }
+        if ($template->title) {
+            $this->title = $template->title;
+        }
+        if ($template->body) {
+            $this->body = $template->body;
+        }
+        if ($template->target) {
+            $this->target = $template->target;
+        }
+        
+        $this->showForm = true;
+    }
+
+    public function applyTemplate(): void
+    {
+        if ($this->templateId) {
+            $this->createFromTemplate($this->templateId);
+        }
+    }
+
     public function edit(int $id): void
     {
         $post = Post::findOrFail($id);
@@ -128,6 +163,7 @@ class Index extends Component
     public function resetForm(): void
     {
         $this->editingId = null;
+        $this->templateId = null;
         $this->siteId = '';
         $this->socialAccountId = '';
         $this->type = '';