fix(webhooks): add missing columns; add pre-save URL test endpoint

* The model+validation referenced tracked_clients and templates columns
  but they were never in the unifi_webhook_configs migration. Any save
  attempt that included those keys 500'd with "Unknown column".
  Added an additive migration (idempotent) that adds both as nullable
  json columns.
* New POST /settings/webhooks/test-url endpoint takes a url+secret in
  the body and fires the standard test payload. Lets operators validate
  their endpoint before saving the row — useful when first wiring up
  Google Chat, Slack, etc.

v1.5.4.

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

composer.json

@@ -1,7 +1,7 @@
 {
     "name": "dashboard/unifi",
     "description": "UniFi network management, WiFi stats, and captive portal authentication for the Dashboard platform",
-    "version": "1.5.3",
+    "version": "1.5.4",
     "type": "library",
     "license": "MIT",
     "autoload": {

database/migrations/2026_05_24_000002_add_templates_and_tracked_clients_to_unifi_webhook_configs.php

@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('unifi_webhook_configs', function (Blueprint $table) {
+            if (! Schema::hasColumn('unifi_webhook_configs', 'tracked_clients')) {
+                $table->json('tracked_clients')->nullable()->after('device_filter');
+            }
+            if (! Schema::hasColumn('unifi_webhook_configs', 'templates')) {
+                $table->json('templates')->nullable()->after('tracked_clients');
+            }
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::table('unifi_webhook_configs', function (Blueprint $table) {
+            if (Schema::hasColumn('unifi_webhook_configs', 'templates')) {
+                $table->dropColumn('templates');
+            }
+            if (Schema::hasColumn('unifi_webhook_configs', 'tracked_clients')) {
+                $table->dropColumn('tracked_clients');
+            }
+        });
+    }
+};

src/Http/Controllers/WebhookController.php

@@ -67,6 +67,25 @@ class WebhookController extends Controller
     }
 
     public function test(WebhookConfig $webhook)
+    {
+        return $this->fireTest($webhook->url, $webhook->secret);
+    }
+
+    /**
+     * Test an arbitrary URL+secret before the webhook is saved. Lets the
+     * operator validate their endpoint from the form without first
+     * committing a row.
+     */
+    public function testUrl(Request $request)
+    {
+        $data = $request->validate([
+            'url'    => 'required|url|max:500',
+            'secret' => 'nullable|string|max:255',
+        ]);
+        return $this->fireTest($data['url'], $data['secret'] ?? null);
+    }
+
+    private function fireTest(string $url, ?string $secret)
     {
         $payload = [
             'event'     => 'test',
@@ -75,13 +94,17 @@ class WebhookController extends Controller
         ];
 
         $headers = ['Content-Type' => 'application/json'];
-        if ($webhook->secret) {
-            $headers['X-Webhook-Signature'] = hash_hmac('sha256', json_encode($payload), $webhook->secret);
+        if ($secret) {
+            $headers['X-Webhook-Signature'] = hash_hmac('sha256', json_encode($payload), $secret);
         }
 
         try {
-            $response = \Illuminate\Support\Facades\Http::withHeaders($headers)->timeout(10)->post($webhook->url, $payload);
-            return response()->json(['ok' => true, 'status' => $response->status()]);
+            $response = \Illuminate\Support\Facades\Http::withHeaders($headers)->timeout(10)->post($url, $payload);
+            return response()->json([
+                'ok'     => $response->successful(),
+                'status' => $response->status(),
+                'body'   => mb_substr((string) $response->body(), 0, 500),
+            ]);
         } catch (\Throwable $e) {
             return response()->json(['ok' => false, 'error' => $e->getMessage()], 422);
         }

src/routes/unifi.php

@@ -89,6 +89,7 @@ Route::middleware(['web', 'auth', 'app.access:unifi'])
             Route::put('/settings/webhooks/{webhook}',          [WebhookController::class, 'update']) ->name('webhooks.update');
             Route::delete('/settings/webhooks/{webhook}',       [WebhookController::class, 'destroy'])->name('webhooks.destroy');
             Route::post('/settings/webhooks/{webhook}/test',    [WebhookController::class, 'test'])   ->name('webhooks.test');
+            Route::post('/settings/webhooks/test-url',          [WebhookController::class, 'testUrl'])->name('webhooks.test-url');
         });
     });