feat: box-drawing table to GFM pipe table conversion

src/Web/wwwroot/js/docs.js

@@ -333,22 +333,66 @@ function docsExportPdf() {
 
 /* ── 마크다운 렌더 파이프라인 ──────────────────────────────── */
 
-/// box-drawing 문자(┌─┬┐│├─┼┤└─┴┘) 라인을 fenced code block으로 감싸 고정폭 렌더링 보장
+/// box-drawing 문자(┌─┬┐│├─┼┤└─┴┘) 라인을 감지하여 표는 GFM pipe table(|---|)로,
+/// 일반 box line은 ``` fence로 감싸 고정폭 렌더링 보장
 function docsWrapBoxDrawing(text) {
   const BOX_RE = /^[ \t]*[┌┐└┘├┤┬┴┼│─━]/;
   const lines = text.split('\n');
   const out = [];
   let inBlock = false;
+  let buf = [];
   for (const line of lines) {
     const isBox = BOX_RE.test(line);
-    if (isBox && !inBlock) { out.push('```'); inBlock = true; }
-    else if (!isBox && inBlock) { out.push('```'); inBlock = false; }
-    out.push(line);
+    if (isBox && !inBlock) { inBlock = true; buf = [line]; }
+    else if (isBox && inBlock) { buf.push(line); }
+    else {
+      if (inBlock) { out.push(docsBoxBlockToGfm(buf)); inBlock = false; buf = []; }
+      out.push(line);
+    }
   }
-  if (inBlock) out.push('```');
+  if (inBlock) out.push(docsBoxBlockToGfm(buf));
   return out.join('\n');
 }
 
+/// box-drawing block이 표(┬┴┼ + │)면 GFM pipe table로, 아니면 ``` fence로
+function docsBoxBlockToGfm(buf) {
+  var joined = buf.join('');
+  if (!/[┬┴┼]/.test(joined) || !/│/.test(joined))
+    return '```\n' + buf.join('\n') + '\n```';
+
+  // ┬/┴/┼ 포함 라인에서 컬럼 경계 위치 추출
+  var pat = null;
+  for (var i = 0; i < buf.length; i++) { if (/[┬┴┼]/.test(buf[i])) { pat = buf[i]; break; } }
+  if (!pat) return '```\n' + buf.join('\n') + '\n```';
+
+  var seps = [];
+  for (var i = 0; i < pat.length; i++) {
+    if ('┬┴┼┌└├┐┘┤'.indexOf(pat[i]) >= 0) seps.push(i);
+  }
+  if (seps.length < 2) return '```\n' + buf.join('\n') + '\n```';
+
+  var numCols = seps.length - 1;
+  var dataRows = [];
+  for (var i = 0; i < buf.length; i++) {
+    if (/^[ \t]*│/.test(buf[i])) dataRows.push(buf[i]);
+  }
+  if (dataRows.length === 0) return '```\n' + buf.join('\n') + '\n```';
+
+  var result = [];
+  // header
+  var hdr = [];
+  for (var c = 0; c < numCols; c++) hdr.push(dataRows[0].substring(seps[c] + 1, seps[c + 1]).trim());
+  result.push('| ' + hdr.join(' | ') + ' |');
+  result.push('|' + ' --- |'.repeat(numCols));
+  // data
+  for (var r = 1; r < dataRows.length; r++) {
+    var row = [];
+    for (var c = 0; c < numCols; c++) row.push(dataRows[r].substring(seps[c] + 1, seps[c + 1]).trim());
+    result.push('| ' + row.join(' | ') + ' |');
+  }
+  return result.join('\n');
+}
+
 function docsRenderMarkdownInto(el, text) {
   text = docsWrapBoxDrawing(text);
   const rawHtml = marked.parse(text, { gfm: true, breaks: false });