feat: add Integration Credentials CRUD and Deploy UI

Integration Credentials:
- Add IntegrationCredential model with encrypted payload
- Add full CRUD: ManageIntegrationCredentialsAction, 4 Tasks, Controller, Requests
- Add migration for integration_credentials table
- Add Vue pages: Index, Create, Edit
- AI tasks now read API keys from DB instead of .env
- Add sidebar menu item

Deploy UI:
- Add DeployTask with full deploy lifecycle management
- Extend DeployController with index, log, history endpoints
- Add Deploy/Index.vue with live polling and deploy log viewer
- Add sidebar menu item and QuickAction for Sveden

UI:
- Add 'key' icon to SidebarNavItem
- Change deploy button color to amber in Main.vue

app/Containers/Dashboard/Actions/IntegrationCredentials/ManageIntegrationCredentialsAction.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Containers\Dashboard\Actions\IntegrationCredentials;
+
+use App\Containers\Dashboard\Models\IntegrationCredential;
+use App\Containers\Dashboard\Tasks\IntegrationCredentials\DeleteIntegrationCredentialTask;
+use App\Containers\Dashboard\Tasks\IntegrationCredentials\GetIntegrationCredentialTask;
+use App\Containers\Dashboard\Tasks\IntegrationCredentials\ListIntegrationCredentialsTask;
+use App\Containers\Dashboard\Tasks\IntegrationCredentials\SaveIntegrationCredentialTask;
+use Illuminate\Database\Eloquent\Collection;
+
+class ManageIntegrationCredentialsAction
+{
+    public function __construct(
+        private readonly ListIntegrationCredentialsTask $listTask,
+        private readonly SaveIntegrationCredentialTask $saveTask,
+        private readonly DeleteIntegrationCredentialTask $deleteTask,
+    ) {}
+
+    public function list(): Collection
+    {
+        return $this->listTask->run();
+    }
+
+    public function create(array $data): IntegrationCredential
+    {
+        return $this->saveTask->run(
+            $data['provider'],
+            $data['payload'],
+            $data['is_active'] ?? true,
+        );
+    }
+
+    public function update(IntegrationCredential $credential, array $data): IntegrationCredential
+    {
+        return $this->saveTask->run(
+            $data['provider'],
+            $data['payload'],
+            $data['is_active'] ?? true,
+        );
+    }
+
+    public function delete(IntegrationCredential $credential): bool
+    {
+        return $this->deleteTask->run($credential);
+    }
+}