Fix admin AI nav bug, add rescan feature

- Fix Blade parse error in admin AI settings (Blade was interpreting
  JSON braces in DEFAULT_PROMPT as template tags, breaking the navbar)
  — pass defaultPrompt from controller instead
- Add rescan: POST /nail-polishes/{id}/rescan creates a new import for
  an existing nail polish and updates its fields after AI analysis
- Add KI-Rescan button on collection cards (only if image exists)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Http/Controllers/Admin/AiSettingController.php

@@ -10,8 +10,9 @@ class AiSettingController extends Controller
 {
     public function show()
     {
-        $ai = AiSetting::get();
-        return view('admin.ai.show', compact('ai'));
+        $ai            = AiSetting::get();
+        $defaultPrompt = AiSetting::DEFAULT_PROMPT;
+        return view('admin.ai.show', compact('ai', 'defaultPrompt'));
     }
 
     public function update(Request $request)

app/Http/Controllers/NailPolishImportController.php

@@ -3,6 +3,7 @@
 namespace App\Http\Controllers;
 
 use App\Jobs\ProcessNailPolishImage;
+use App\Models\NailPolish;
 use App\Models\NailPolishImport;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Storage;
@@ -63,9 +64,25 @@ class NailPolishImportController extends Controller
 
     public function show(NailPolishImport $nailPolishImport)
     {
-        // Nur eigene Imports ansehen
         abort_if($nailPolishImport->user_id !== auth()->id(), 403);
 
         return view('nail-polish-imports.show', ['import' => $nailPolishImport->load('nailPolish.manufacturer')]);
     }
+
+    public function rescan(NailPolish $nailPolish)
+    {
+        abort_unless($nailPolish->image_path, 404);
+
+        $import = NailPolishImport::create([
+            'user_id'        => auth()->id(),
+            'image_path'     => $nailPolish->image_path,
+            'status'         => 'pending',
+            'nail_polish_id' => $nailPolish->id,
+        ]);
+
+        ProcessNailPolishImage::dispatch($import->id);
+
+        return redirect()->route('nail-polish-imports.show', $import)
+            ->with('success', 'KI-Analyse gestartet. Die Daten werden aktualisiert.');
+    }
 }

app/Jobs/ProcessNailPolishImage.php

@@ -61,22 +61,32 @@ class ProcessNailPolishImage implements ShouldQueue
                 );
             }
 
-            // Nagellack-Nummer eindeutig machen falls nötig
-            $number = $data['number'] ?? ('import-' . $this->importId);
-            if (NailPolish::where('number', $number)->exists()) {
-                $number .= '-' . $this->importId;
+            // Rescan: bestehenden Lack updaten
+            if ($import->nail_polish_id) {
+                $nailPolish = NailPolish::findOrFail($import->nail_polish_id);
+                $nailPolish->update([
+                    'name'            => $data['name'] ?? $nailPolish->name,
+                    'number'          => $data['number'] ?? $nailPolish->number,
+                    'manufacturer_id' => $manufacturer?->id ?? $nailPolish->manufacturer_id,
+                ]);
+            } else {
+                // Neuen Lack anlegen
+                $number = $data['number'] ?? ('import-' . $this->importId);
+                if (NailPolish::where('number', $number)->exists()) {
+                    $number .= '-' . $this->importId;
+                }
+
+                $nailPolish = NailPolish::create([
+                    'name'            => $data['name'] ?? 'Unbekannt',
+                    'number'          => $number,
+                    'manufacturer_id' => $manufacturer?->id,
+                    'image_path'      => $import->image_path,
+                ]);
+
+                // Zur Sammlung des Users hinzufügen
+                $import->user->nailPolishes()->syncWithoutDetaching([$nailPolish->id]);
             }
 
-            $nailPolish = NailPolish::create([
-                'name'            => $data['name'] ?? 'Unbekannt',
-                'number'          => $number,
-                'manufacturer_id' => $manufacturer?->id,
-                'image_path'      => $import->image_path,
-            ]);
-
-            // Zur Sammlung des Users hinzufügen
-            $import->user->nailPolishes()->syncWithoutDetaching([$nailPolish->id]);
-
             $import->update([
                 'status'         => 'done',
                 'result'         => $data,