feat: Vorschau-Modal für Dokument-Dateien mit Unterstützung für mehrere Formate

- Prop `format` zu DocFullView hinzugefügt, um den Dateityp zu spezifizieren
- Dynamische Blob-Generierung mit korrektem MIME-Typ implementiert
- Unterstützt Inline-Vorschau für Formate wie PDF, HTML, Bilder, etc.
- Fallback zum Download-Link für nicht unterstützte Dateitypen
- Ungenutzte Statusfelder wurden entfernt und der modale Inhalt vereinfacht

src/client/dd-hub-react/src/sections/document/doc-item.tsx

@@ -164,7 +164,7 @@ export function DocItem({
 
     return (
         <>
-            <DocFullView data={doc.data} open={openViewDoc} handleClose={() => setOpenViewDoc(false)} />
+            <DocFullView data={doc.data} open={openViewDoc} handleClose={() => setOpenViewDoc(false)} format={doc.extension} />
             <Card sx={sx} {...other} onClick={() => setOpenViewDoc(true)}>
                 <Box
                     sx={(theme) => ({

src/client/dd-hub-react/src/sections/document/view/doc-full-view.tsx

@@ -1,13 +1,33 @@
-import { useState } from 'react';
+import { useEffect, useState } from 'react';
 
 import Box from '@mui/material/Box';
 import Modal from '@mui/material/Modal';
-import { TextField } from '@mui/material';
 
-import { Type } from 'src/api/attribute-service';
+import { FileFormat } from 'src/api/document-service';
+
+const getMimeType = (format: FileFormat): string => {
+    switch (format) {
+        case 'pdf': return 'application/pdf';
+        case 'docx': return 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
+        case 'xlsx': return 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
+        case 'csv': return 'text/csv';
+        case 'pptx': return 'application/vnd.openxmlformats-officedocument.presentationml.presentation';
+        case 'txt': return 'text/plain';
+        case 'json': return 'application/json';
+        case 'xml': return 'application/xml';
+        case 'html': return 'text/html';
+        case 'jpg': return 'image/jpeg';
+        case 'png': return 'image/png';
+        case 'svg': return 'image/svg+xml';
+        case 'zip': return 'application/zip';
+        case 'md': return 'text/markdown';
+        default: return 'application/octet-stream';
+    }
+};
 
 type DocFullViewProps = {
     data: Uint8Array;
+    format?: FileFormat;
     open: boolean;
     handleClose: () => void;
 }
@@ -17,29 +37,70 @@ const style = {
     top: '50%',
     left: '50%',
     transform: 'translate(-50%, -50%)',
-    width: 400,
-    bgcolor: 'background.paper',
-    border: '2px solid #000',
-    boxShadow: 24,
-    p: 4,
+    width: '90%',
+    height: '90%',
+    bgcolor: 'transparent',
 };
 
-export default function DocFullView({ data, open, handleClose }: DocFullViewProps) {
-    const [name, setName] = useState<string | undefined>('');
-    const [label, setLabel] = useState<string | undefined>('');
-    const [selectedType, setSelectedType] = useState<Type | null>(null);
+export default function DocFullView({ data, format, open, handleClose }: DocFullViewProps) {
+    const [objectUrl, setObjectUrl] = useState<string | null>(null);
+
+    useEffect(() => {
+        if (!data || !format)
+            return undefined;
+
+        const mimeType = getMimeType(format);
+        const blob = new Blob([data], { type: mimeType });
+        const url = URL.createObjectURL(blob);
+        setObjectUrl(url);
+
+        return () => {
+            URL.revokeObjectURL(url);
+        };
+    }, [data, format]);
+
+    const renderContent = () => {
+        if (!objectUrl || !format) return null;
+
+        if (['pdf', 'html', 'txt', 'json', 'xml', 'md'].includes(format)) {
+            return (
+                <iframe
+                    src={objectUrl}
+                    style={{ width: '100%', height: '100%', border: 'none' }}
+                    title={`Viewer for ${format}`}
+                />
+            );
+        }
+
+        if (['jpg', 'png', 'svg'].includes(format)) {
+            return (
+                <img
+                    src={objectUrl}
+                    alt="Document Preview"
+                    style={{ maxWidth: '100%', maxHeight: '100%' }}
+                />
+            );
+        }
+
+        // Download link for unsupported preview formats
+        return (
+            <Box textAlign="center">
+                <p>This file type cannot be displayed. You can download it below:</p>
+                <a href={objectUrl} download={`document.${format}`}>Download file</a>
+            </Box>
+        );
+    };
 
     return (
         <Modal
             open={open}
+            onClose={handleClose}
             aria-labelledby="modal-modal-title"
             aria-describedby="modal-modal-description"
-            onClose={handleClose}
         >
             <Box sx={style}>
-                <TextField label="Label" variant="filled" value={name} onChange={e => setName(e.target.value)} />
-                <TextField label="Name" variant="filled" value={label} onChange={e => setLabel(e.target.value)} />
+                {renderContent()}
             </Box>
         </Modal>
     );
-}
+}