feat: render CSVs as table (#5569)

Co-authored-by: Henrique Dias <mail@hacdias.com>

frontend/src/components/files/CsvViewer.vue

@@ -0,0 +1,202 @@
+<template>
+  <div class="csv-viewer">
+    <div v-if="displayError" class="csv-error">
+      <i class="material-icons">error</i>
+      <p>{{ displayError }}</p>
+    </div>
+    <div v-else-if="data.headers.length === 0" class="csv-empty">
+      <i class="material-icons">description</i>
+      <p>{{ $t("files.lonely") }}</p>
+    </div>
+    <div
+      v-else
+      class="csv-table-container"
+      @wheel.stop
+      @touchmove.stop
+    >
+      <table class="csv-table">
+        <thead>
+          <tr>
+            <th v-for="(header, index) in data.headers" :key="index">
+              {{ header || `Column ${index + 1}` }}
+            </th>
+          </tr>
+        </thead>
+        <tbody>
+          <tr v-for="(row, rowIndex) in data.rows" :key="rowIndex">
+            <td v-for="(cell, cellIndex) in row" :key="cellIndex">
+              {{ cell }}
+            </td>
+          </tr>
+        </tbody>
+      </table>
+      <div v-if="data.rows.length > 100" class="csv-info">
+        <i class="material-icons">info</i>
+        <span>Showing {{ data.rows.length }} rows</span>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { parseCSV, type CsvData } from "@/utils/csv";
+import { computed } from "vue";
+
+interface Props {
+  content: string;
+  error?: string;
+}
+
+const props = withDefaults(defineProps<Props>(), {
+  error: "",
+});
+
+const data = computed<CsvData>(() => {
+  try {
+    return parseCSV(props.content);
+  } catch (e) {
+    console.error("Failed to parse CSV:", e);
+    return { headers: [], rows: [] };
+  }
+});
+
+const displayError = computed(() => {
+  // External error takes priority (e.g., file too large)
+  if (props.error) {
+    return props.error;
+  }
+  // Check for parse errors
+  if (props.content && props.content.trim().length > 0 && data.value.headers.length === 0) {
+    return "Failed to parse CSV file";
+  }
+  return null;
+});
+</script>
+
+<style scoped>
+.csv-viewer {
+  width: 100%;
+  height: 100%;
+  display: flex;
+  flex-direction: column;
+  background-color: var(--surfacePrimary);
+  color: var(--textSecondary);
+  padding: 1rem;
+  padding-top: 4em;
+  box-sizing: border-box;
+}
+
+.csv-error,
+.csv-empty {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  height: 100%;
+  gap: 1rem;
+  color: var(--textPrimary);
+}
+
+.csv-error i,
+.csv-empty i {
+  font-size: 4rem;
+  opacity: 0.5;
+}
+
+.csv-error p,
+.csv-empty p {
+  font-size: 1.1rem;
+  margin: 0;
+}
+
+.csv-table-container {
+  flex: 1;
+  overflow: auto;
+  background-color: var(--surfacePrimary);
+  border-radius: 4px;
+  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
+}
+
+/* Scrollbar styling for better visibility */
+.csv-table-container::-webkit-scrollbar {
+  width: 12px;
+  height: 12px;
+}
+
+.csv-table-container::-webkit-scrollbar-track {
+  background: var(--background);
+  border-radius: 4px;
+}
+
+.csv-table-container::-webkit-scrollbar-thumb {
+  background: var(--borderSecondary);
+  border-radius: 4px;
+}
+
+.csv-table-container::-webkit-scrollbar-thumb:hover {
+  background: var(--textPrimary);
+}
+
+.csv-table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 0.875rem;
+  background-color: var(--surfacePrimary);
+}
+
+.csv-table thead {
+  position: sticky;
+  top: 0;
+  z-index: 10;
+  background-color: var(--surfaceSecondary);
+}
+
+.csv-table th {
+  padding: 0.875rem 1rem;
+  text-align: left;
+  font-weight: 600;
+  border-bottom: 2px solid var(--borderSecondary);
+  background-color: var(--surfaceSecondary);
+  white-space: nowrap;
+  color: var(--textSecondary);
+  font-size: 0.875rem;
+}
+
+.csv-table td {
+  padding: 0.75rem 1rem;
+  text-align: left;
+  border-bottom: 1px solid var(--borderPrimary);
+  white-space: nowrap;
+  max-width: 400px;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  color: var(--textSecondary);
+}
+
+.csv-table tbody tr:nth-child(even) {
+  background-color: var(--background);
+}
+
+.csv-table tbody tr:hover {
+  background-color: var(--hover);
+  transition: background-color 0.15s ease;
+}
+
+.csv-info {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.75rem 1rem;
+  margin-top: 0.5rem;
+  background-color: var(--surfaceSecondary);
+  border-radius: 4px;
+  border-left: 3px solid var(--blue);
+  color: var(--textSecondary);
+  font-size: 0.875rem;
+}
+
+.csv-info i {
+  font-size: 1.2rem;
+  color: var(--blue);
+}
+</style>