feat: Add markdown table rendering support (#1955)

Co-authored-by: heartyguy <heartyguy@users.noreply.github.com>
Co-authored-by: Allen Hutchison <adh@google.com>

packages/cli/src/ui/utils/TableRenderer.tsx

@@ -0,0 +1,114 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import React from 'react';
+import { Text, Box } from 'ink';
+import { Colors } from '../colors.js';
+
+interface TableRendererProps {
+  headers: string[];
+  rows: string[][];
+  terminalWidth: number;
+}
+
+/**
+ * Custom table renderer for markdown tables
+ * We implement our own instead of using ink-table due to module compatibility issues
+ */
+export const TableRenderer: React.FC<TableRendererProps> = ({
+  headers,
+  rows,
+  terminalWidth,
+}) => {
+  // Calculate column widths
+  const columnWidths = headers.map((header, index) => {
+    const headerWidth = header.length;
+    const maxRowWidth = Math.max(
+      ...rows.map((row) => (row[index] || '').length),
+    );
+    return Math.max(headerWidth, maxRowWidth) + 2; // Add padding
+  });
+
+  // Ensure table fits within terminal width
+  const totalWidth = columnWidths.reduce((sum, width) => sum + width + 1, 1);
+  const scaleFactor =
+    totalWidth > terminalWidth ? terminalWidth / totalWidth : 1;
+  const adjustedWidths = columnWidths.map((width) =>
+    Math.floor(width * scaleFactor),
+  );
+
+  const renderCell = (content: string, width: number, isHeader = false) => {
+    // The actual space for content inside the padding
+    const contentWidth = Math.max(0, width - 2);
+
+    let cellContent = content;
+    if (content.length > contentWidth) {
+      if (contentWidth <= 3) {
+        // Not enough space for '...'
+        cellContent = content.substring(0, contentWidth);
+      } else {
+        cellContent = content.substring(0, contentWidth - 3) + '...';
+      }
+    }
+
+    // Pad the content to fill the cell
+    const padded = cellContent.padEnd(contentWidth, ' ');
+
+    if (isHeader) {
+      return (
+        <Text bold color={Colors.AccentCyan}>
+          {padded}
+        </Text>
+      );
+    }
+    return <Text>{padded}</Text>;
+  };
+
+  const renderRow = (cells: string[], isHeader = false) => (
+    <Box flexDirection="row">
+      <Text>│ </Text>
+      {cells.map((cell, index) => (
+        <React.Fragment key={index}>
+          {renderCell(cell, adjustedWidths[index] || 0, isHeader)}
+          <Text> │ </Text>
+        </React.Fragment>
+      ))}
+    </Box>
+  );
+
+  const renderSeparator = () => {
+    const separator = adjustedWidths
+      .map((width) => '─'.repeat(Math.max(0, (width || 0) - 2)))
+      .join('─┼─');
+    return <Text>├─{separator}─┤</Text>;
+  };
+
+  const renderTopBorder = () => {
+    const border = adjustedWidths
+      .map((width) => '─'.repeat(Math.max(0, (width || 0) - 2)))
+      .join('─┬─');
+    return <Text>┌─{border}─┐</Text>;
+  };
+
+  const renderBottomBorder = () => {
+    const border = adjustedWidths
+      .map((width) => '─'.repeat(Math.max(0, (width || 0) - 2)))
+      .join('─┴─');
+    return <Text>└─{border}─┘</Text>;
+  };
+
+  return (
+    <Box flexDirection="column" marginY={1}>
+      {renderTopBorder()}
+      {renderRow(headers, true)}
+      {renderSeparator()}
+      {rows.map((row, index) => (
+        <React.Fragment key={index}>{renderRow(row)}</React.Fragment>
+      ))}
+      {renderBottomBorder()}
+    </Box>
+  );
+};