chore: Client-App-Dateien unter wwwroot aktualisiert

- Client-App-Dateien im Verzeichnis `wwwroot` aktualisiert, um die neuesten Änderungen und Verbesserungen widerzuspiegeln.

EnvelopeGenerator.GeneratorAPI/wwwroot/assets/img/login_logo.svg

@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="3em" height="2.5em" viewBox="0 0 24 24" style="stroke: #a9a8ad;">
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+<path fill-rule="evenodd" clip-rule="evenodd" d="M1.25098 11.999C1.25098 11.5848 1.58676 11.249 2.00098 11.249L13.9735 11.249L12.0129 9.56845C11.6984 9.29889 11.662 8.82541 11.9315 8.51092C12.2011 8.19642 12.6746 8.16 12.9891 8.42957L16.4891 11.4296C16.6553 11.5721 16.751 11.7801 16.751 11.999C16.751 12.218 16.6553 12.426 16.4891 12.5685L12.9891 15.5685C12.6746 15.838 12.2011 15.8016 11.9315 15.4871C11.662 15.1726 11.6984 14.6991 12.0129 14.4296L13.9735 12.749L2.00098 12.749C1.58676 12.749 1.25098 12.4132 1.25098 11.999Z" fill="#1C274C"/>
+</svg>