refactor : merge Inventory_frontend submodule into frontend/ directory

Merges the full git history of Inventory_frontend into the monorepo
under frontend/. Removes the submodule in favor of a unified repo.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/app/components/DocumentThumbnail.vue

@@ -0,0 +1,105 @@
+<template>
+  <div
+    v-if="document"
+    class="flex items-center justify-center overflow-hidden rounded-md border border-base-200 bg-base-200/70"
+    :class="thumbnailClass"
+  >
+    <img
+      v-if="canRenderImage"
+      :src="previewSrc"
+      class="h-full w-full object-cover"
+      :alt="altText"
+      loading="lazy"
+      decoding="async"
+    >
+    <component
+      v-else
+      :is="icon.component"
+      class="h-6 w-6"
+      :class="icon.colorClass"
+      aria-hidden="true"
+    />
+  </div>
+  <div
+    v-else
+    class="flex h-16 w-16 items-center justify-center rounded-md border border-dashed border-base-200 bg-base-200/40 text-xs text-base-content/40"
+    aria-hidden="true"
+  >
+    —
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed } from 'vue';
+import { getFileIcon } from '~/utils/fileIcons';
+import { isImageDocument, isPdfDocument } from '~/utils/documentPreview';
+
+type GenericDocument = {
+  id?: string | number;
+  name?: string | null;
+  filename?: string | null;
+  mimeType?: string | null;
+  path?: string | null;
+  fileUrl?: string | null;
+  downloadUrl?: string | null;
+  size?: number | null;
+};
+
+const props = defineProps<{
+  document: GenericDocument | null | undefined;
+  alt?: string;
+}>();
+
+const normalizedDocument = computed(() => props.document ?? null);
+
+const canRenderImage = computed(() => {
+  const doc = normalizedDocument.value;
+  return !!(doc && isImageDocument(doc) && (doc.fileUrl || doc.path));
+});
+
+const canRenderPdf = computed(() => {
+  // Rendering many PDF iframes in a list is very heavy for the browser.
+  // We intentionally disable inline PDF previews and fall back to an icon.
+  return false;
+});
+
+const appendPdfViewerParams = (src: string) => {
+  if (!src || src.startsWith('data:')) {
+    return src;
+  }
+  if (src.includes('#')) {
+    return `${src}&toolbar=0&navpanes=0`;
+  }
+  return `${src}#toolbar=0&navpanes=0`;
+};
+
+const previewSrc = computed(() => {
+  const doc = normalizedDocument.value;
+  const url = doc?.fileUrl || doc?.path;
+  if (!doc || !url) {
+    return '';
+  }
+  if (isPdfDocument(doc)) {
+    return appendPdfViewerParams(url);
+  }
+  return url;
+});
+
+const thumbnailClass = computed(() => (canRenderImage.value || canRenderPdf.value ? 'h-20 w-16' : 'h-16 w-16'));
+
+const icon = computed(() => {
+  const doc = normalizedDocument.value;
+  return getFileIcon({
+    name: doc?.filename || doc?.name || '',
+    mime: doc?.mimeType || undefined,
+  });
+});
+
+const altText = computed(() => {
+  if (props.alt) {
+    return props.alt;
+  }
+  const doc = normalizedDocument.value;
+  return doc?.name ? `Aperçu de ${doc.name}` : 'Aperçu du document';
+});
+</script>