add possibility to disable delete and upload of books

frontend/src/views/UploadView.vue

@@ -1,10 +1,10 @@
 <template>
   <div class="upload-view">
     <h1 class="page-title">Book Library</h1>
-    <p class="page-subtitle">Upload medical textbooks (PDF) to build the knowledge base.</p>
+    <p v-if="uploadEnabled" class="page-subtitle">Upload medical textbooks (PDF) to build the knowledge base.</p>
 
     <!-- Upload Section -->
-    <div class="upload-section card">
+    <div v-if="uploadEnabled" class="upload-section card">
       <h2 class="section-title">Upload a Book</h2>
 
       <div
@@ -87,6 +87,7 @@
           :key="book.id"
           :book="book"
           :deleting="deletingId === book.id"
+          :delete-enabled="deleteEnabled"
           @delete="handleDelete"
         />
       </div>
@@ -99,6 +100,9 @@ import { ref, onMounted, onUnmounted, inject } from 'vue'
 import { useBookStore } from '@/stores/bookStore'
 import BookCard from '@/components/BookCard.vue'
 
+const uploadEnabled = import.meta.env.VITE_UPLOAD_ENABLED !== 'false'
+const deleteEnabled = import.meta.env.VITE_DELETE_ENABLED !== 'false'
+
 const bookStore = useBookStore()
 const showToast = inject<(msg: string, type?: 'error' | 'success') => void>('showToast')