feat: full-text search across all doc modules

docs_v1.0/doc_wasm/index.html

@@ -142,6 +142,42 @@ async function loadDoc(name) {
   }
 }
 
+function escapeHtml(s) {
+  return s.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
+}
+
+async function fulltextSearch(q) {
+  el.innerHTML = '<p>Searching...</p>';
+  var results = [];
+  for (var i = 0; i < MODULES.length; i++) {
+    var m = MODULES[i];
+    try {
+      var resp = await fetch('/doc-wasm/modules/' + m[0] + '.md');
+      if (!resp.ok) continue;
+      var md = await resp.text();
+      var lines = md.split('\n');
+      for (var li = 0; li < lines.length; li++) {
+        if (lines[li].toLowerCase().indexOf(q) >= 0) {
+          results.push({ module: m[0], title: m[1] + ' / ' + m[2], line: li + 1, text: lines[li].trim() });
+          if (results.length > 50) break;
+        }
+      }
+    } catch(e) {}
+  }
+  if (results.length === 0) {
+    el.innerHTML = '<p>No results for <strong>' + escapeHtml(q) + '</strong></p>';
+    return;
+  }
+  var html = '<h2>Search: ' + escapeHtml(q) + '</h2><p>' + results.length + ' result(s)</p>';
+  for (var r of results) {
+    html += '<p style="margin:4px 0"><a href="#" onclick="loadDoc(\'' + r.module + '\');return false" style="font-weight:600">'
+         + r.module + ' ' + escapeHtml(r.title) + '</a> <span style="color:#888;font-size:12px">line ' + r.line + '</span><br>'
+         + '<code style="background:#f5f5f5;padding:2px 6px;border-radius:3px;font-size:12px;display:inline-block;max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap">'
+         + escapeHtml(r.text) + '</code></p>';
+  }
+  el.innerHTML = html;
+}
+
 async function loginUser(user, pass) {
   var resp = await fetch('/api/v1/auth/login', {
     method:'POST', headers:{'Content-Type':'application/json'},
@@ -187,14 +223,18 @@ async function initApp() {
       a.onclick = function(e) { e.preventDefault(); loadDoc(m[0]); };
       listEl.appendChild(a);
     });
-    // Search filter
+    // Search — full text across all modules
+    var searchTimer = null;
     var searchEl = document.getElementById('search');
     if (searchEl) {
       searchEl.oninput = function() {
-        var q = this.value.toLowerCase();
+        var q = this.value.toLowerCase().trim();
         document.querySelectorAll('#module-list a').forEach(function(a) {
           a.style.display = a.textContent.toLowerCase().indexOf(q) >= 0 ? '' : 'none';
         });
+        if (searchTimer) clearTimeout(searchTimer);
+        if (q.length < 2) { loadDoc(location.hash.slice(1) || '01_auth'); return; }
+        searchTimer = setTimeout(function() { fulltextSearch(q); }, 300);
       };
     }
     // Watch for logout disappearing