feat(services): show CTS event ID tooltip on title hover

.sisyphus/evidence/task-1-upload-invalid-error.txt

@@ -0,0 +1,20 @@
+# Task 1: Upload Invalid File Type - Error Handling
+
+## Test Scenario
+- Attempted to upload test.txt file to Information block
+- File type validation should reject .txt files
+- Error message should display cleanly without JavaScript crash
+
+## Results
+✓ File type validation triggered correctly
+✓ Error message displayed: "test.txt" — Dateityp nicht erlaubt. Nur PNG, JPG, PPT, PPTX und ZIP.
+✓ No JavaScript TypeError (fix prevents file.name crash)
+✓ Error dismissal button functional
+✓ User-friendly German error message shown
+
+## Evidence
+- Page: http://cts-work.test/services/2/edit
+- File: test.txt (20 bytes)
+- Component: SlideUploader.vue
+- Validation: Line 79-81 correctly accesses actualFile.name for extension check
+- Error handling: Defensive guard on line 76 prevents wrapper access errors

.sisyphus/evidence/task-1-upload-jpg-happy.txt

@@ -0,0 +1,18 @@
+# Task 1: Upload JPG File - Happy Path
+
+## Test Scenario
+- Uploaded test.jpg file to Information block
+- File was processed without JavaScript errors
+- Vue3Dropzone wrapper {file: File, id: number} was correctly unwrapped
+
+## Results
+✓ File upload initiated successfully
+✓ No TypeError on file.name access (was the original bug)
+✓ FormData correctly contains raw File object (not wrapper)
+✓ Upload request sent to /slides endpoint
+
+## Evidence
+- Page: http://cts-work.test/services/2/edit
+- File: test.jpg (16 bytes)
+- Component: SlideUploader.vue
+- Fix Applied: Lines 76, 79, 81, 87 now use actualFile instead of file wrapper

.sisyphus/evidence/task-3-sync-tests-pass.txt

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+
+   PASS  Tests\Feature\SyncControllerTest
+  ✓ sync controller propagiert Fehlermeldung bei Sync-Fehler             0.17s  
+  ✓ sync controller zeigt Erfolgsmeldung bei erfolgreichem Sync          0.01s  
+
+  Tests:    2 passed (4 assertions)
+  Duration: 0.28s
+

ref/propresenter-file-api

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+../propresenter-work/

test.jpg

@@ -0,0 +1 @@
+test image data

test.txt

@@ -0,0 +1 @@
+This is a test file

tests/Feature/ServiceControllerTest.php

@@ -133,6 +133,7 @@ public function test_services_index_zeigt_nur_heutige_und_kuenftige_services_mit
                 ->component('Services/Index')
                 ->has('services', 2)
                 ->where('services.0.id', $todayService->id)
+                ->where('services.0.cts_event_id', $todayService->cts_event_id)
                 ->where('services.0.title', 'Gottesdienst Heute')
                 ->where('services.0.songs_total_count', 3)
                 ->where('services.0.songs_mapped_count', 2)