Fix: korrekte Credit-Verrechnung + Duplikat-Schutz

- Credits nur bei status='success': Konflikt/Fehler/Failed → 0 Credits
- Multi-Action: Credits proportional zu erfolgreichen Aktionen
- AgentActionService: Duplikat-Check vor Event/Task/Notiz-Anlage
- Multi-Action-Status: 'success'/'partial'/'failed' statt immer 'success'
- Gilt für Web (Livewire/Agent/Index) und API (AgentChatController)

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

src/app/Http/Controllers/Api/AgentChatController.php

@@ -137,9 +137,13 @@ class AgentChatController extends Controller
                 foreach ($parsed['_multi'] as $action) {
                     $results[] = $actionService->handle($user, $action);
                 }
+                $successCount = collect($results)->where('status', 'success')->count();
+                $totalCount   = max(1, count($results));
                 $actionResult = [
-                    'status' => collect($results)->every(fn ($r) => $r['status'] === 'success') ? 'success' : 'partial',
+                    'status'        => $successCount === count($results) ? 'success' : ($successCount > 0 ? 'partial' : 'failed'),
                     'results'       => $results,
+                    'success_count' => $successCount,
+                    'total_count'   => $totalCount,
                 ];
             } elseif (isset($parsed['type']) && $parsed['type'] !== 'chat') {
                 $actionService = new AgentActionService();
@@ -180,9 +184,16 @@ class AgentChatController extends Controller
         $shouldLog = true;
 
         if ($isAction) {
-            $credits = (($actionResult['status'] ?? '') === 'error')
+            $status = $actionResult['status'] ?? 'error';
-                ? 0
+            if ($status !== 'success' && $status !== 'partial') {
-                : $this->calculateCredits($usage, $aiConfig, $type);
+                $credits = 0;
+            } elseif (isset($actionResult['success_count'], $actionResult['total_count'])) {
+                // Multi-Action: proportional zu erfolgreichen Aktionen
+                $full    = $this->calculateCredits($usage, $aiConfig, $type);
+                $credits = (int) ceil($full * $actionResult['success_count'] / $actionResult['total_count']);
+            } else {
+                $credits = $this->calculateCredits($usage, $aiConfig, $type);
+            }
         } elseif ($historyCount === 0) {
             $credits = 5;
         } else {

src/app/Livewire/Agent/Index.php

@@ -129,10 +129,15 @@ class Index extends Component
                 }
 
                 $duration = round((microtime(true) - $startTime) * 1000);
-                $credits = $this->calculateCredits(['type' => 'multi'], $duration, $usage);
+                $successCount = collect($results)->where('status', 'success')->count();
+                $totalCount   = max(1, count($results));
+                $fullCredits  = $this->calculateCredits(['type' => 'multi'], $duration, $usage);
+                $credits      = $successCount > 0
+                    ? (int) ceil($fullCredits * $successCount / $totalCount)
+                    : 0;
 
                 $combinedResult = [
-                    'status' => 'success',
+                    'status'  => $successCount === count($results) ? 'success' : ($successCount > 0 ? 'partial' : 'failed'),
                     'message' => implode(' | ', $messages) ?: 'Erledigt!',
                     'meta'    => ['actions' => count($actions)],
                 ];
@@ -209,7 +214,9 @@ class Index extends Component
                     $this->dispatch('agent:sent');
 
                 } else {
-                    $credits = $this->calculateCredits($parsed, $duration, $usage);
+                    $credits = ($result['status'] === 'success')
+                        ? $this->calculateCredits($parsed, $duration, $usage)
+                        : 0;
                     $this->logConversationAction($userMessage, $parsed, $result, $model, $duration, $credits);
 
                     if ($result['status'] === 'success' && ($parsed['type'] ?? '') === 'event') {

src/app/Services/AgentActionService.php

@@ -48,9 +48,14 @@ class AgentActionService
         }
 
         if (!empty($data['start']) && !empty($data['end'])) {
+            $title    = $data['title'] ?? 'Termin';
+            $dateStr  = Carbon::parse($data['start'])->toDateString();
+            if (Event::where('user_id', $user->id)->where('title', $title)->whereDate('starts_at', $dateStr)->exists()) {
+                return ['status' => 'failed', 'message' => "Termin \"{$title}\" existiert an diesem Tag bereits.", 'meta' => []];
+            }
 
             return $planner->plan($user, array_merge($data, [
-                'title' => $data['title'] ?? 'Termin',
+                'title' => $title,
                 'start' => $data['start'],
                 'end' => $data['end'],
                 'duration_minutes' => Carbon::parse($data['start'])
@@ -67,9 +72,14 @@ class AgentActionService
         */
 
         if (!empty($data['datetime'])) {
+            $title   = $data['title'] ?? 'Termin';
+            $dateStr = Carbon::parse($data['datetime'])->toDateString();
+            if (Event::where('user_id', $user->id)->where('title', $title)->whereDate('starts_at', $dateStr)->exists()) {
+                return ['status' => 'failed', 'message' => "Termin \"{$title}\" existiert an diesem Tag bereits.", 'meta' => []];
+            }
 
             return $planner->plan($user, array_merge($data, [
-                'title' => $data['title'] ?? 'Termin',
+                'title' => $title,
                 'start' => $data['datetime'],
                 'duration_minutes' => $data['duration_minutes'] ?? null,
                 'ai_duration' => $data['ai_duration'] ?? null,
@@ -92,6 +102,11 @@ class AgentActionService
 
     protected static function handleNote(User $user, array $data): array
     {
+        $content = $data['content'] ?? $data['text'] ?? '';
+        if ($content && Note::where('user_id', $user->id)->where('content', $content)->whereDate('created_at', today())->exists()) {
+            return ['status' => 'failed', 'message' => 'Diese Notiz wurde heute bereits angelegt.', 'meta' => []];
+        }
+
         $note = Note::create([
             'user_id' => $user->id,
             'title'   => $data['title'] ?? null,
@@ -127,6 +142,10 @@ class AgentActionService
     {
         $title = $data['title'] ?? $data['description'] ?? 'Aufgabe';
 
+        if (Task::where('user_id', $user->id)->where('title', $title)->whereDate('created_at', today())->exists()) {
+            return ['status' => 'failed', 'message' => "Aufgabe \"{$title}\" wurde heute bereits angelegt.", 'meta' => []];
+        }
+
         // due_at: AI schickt due_at, due_date oder datetime
         $dueAt = null;
         if (!empty($data['due_at'])) {