fix(coding-agent): fix grep/find/ls HTML export rendering (#3491)

Rename BUILTIN_TOOLS to TEMPLATE_RENDERED_TOOLS to match what the set
actually represents: tools rendered directly by the HTML template instead of
pre-rendered through the TUI→ANSI→HTML pipeline.

Move grep and find off the template-rendered exclusion path so they use their
existing TUI renderCall/renderResult output in HTML export.

Add a dedicated HTML renderer for ls and keep it in the template-rendered set.
Unlike grep and find, rendering ls through the terminal-oriented Text component
introduced spacing artifacts in exported HTML due to full-width line padding,
so ls is rendered natively in the export template instead.

packages/coding-agent/src/core/export-html/index.ts

@@ -173,8 +173,8 @@ function generateHtml(sessionData: SessionData, themeName?: string): string {
 		.replace("{{HIGHLIGHT_JS}}", hljsJs);
 }
 
-/** Built-in tool names that have custom rendering in template.js */
+/** Tools rendered directly by the HTML template (not pre-rendered via TUI→ANSI→HTML pipeline) */
-const BUILTIN_TOOLS = new Set(["bash", "read", "write", "edit", "ls", "find", "grep"]);
+const TEMPLATE_RENDERED_TOOLS = new Set(["bash", "read", "write", "edit", "ls"]);
 
 /**
  * Pre-render custom tools to HTML using their TUI renderers.
@@ -192,7 +192,7 @@ function preRenderCustomTools(
 		// Find tool calls in assistant messages
 		if (msg.role === "assistant" && Array.isArray(msg.content)) {
 			for (const block of msg.content) {
-				if (block.type === "toolCall" && !BUILTIN_TOOLS.has(block.name)) {
+				if (block.type === "toolCall" && !TEMPLATE_RENDERED_TOOLS.has(block.name)) {
 					const callHtml = toolRenderer.renderCall(block.id, block.name, block.arguments);
 					if (callHtml) {
 						renderedTools[block.id] = { callHtml };
@@ -204,9 +204,9 @@ function preRenderCustomTools(
 		// Find tool results
 		if (msg.role === "toolResult" && msg.toolCallId) {
 			const toolName = msg.toolName || "";
-			// Only render if we have a pre-rendered call OR it's not a built-in tool
+			// Only render if we have a pre-rendered call OR it's not template-rendered
 			const existing = renderedTools[msg.toolCallId];
-			if (existing || !BUILTIN_TOOLS.has(toolName)) {
+			if (existing || !TEMPLATE_RENDERED_TOOLS.has(toolName)) {
 				const rendered = toolRenderer.renderResult(
 					msg.toolCallId,
 					toolName,

packages/coding-agent/src/core/export-html/template.js

@@ -76,8 +76,8 @@
 
         // Create nodes
         for (const entry of entries) {
-          nodeMap.set(entry.id, { 
+          nodeMap.set(entry.id, {
-            entry, 
+            entry,
             children: [],
             label: labelMap.get(entry.id)
           });
@@ -200,7 +200,7 @@
         const stack = [];
 
         // Add roots (prioritize branch containing active leaf)
-        const orderedRoots = [...roots].sort((a, b) => 
+        const orderedRoots = [...roots].sort((a, b) =>
           Number(containsActive.get(b)) - Number(containsActive.get(a))
         );
         for (let i = orderedRoots.length - 1; i >= 0; i--) {
@@ -217,7 +217,7 @@
           const multipleChildren = children.length > 1;
 
           // Order children (active branch first)
-          const orderedChildren = [...children].sort((a, b) => 
+          const orderedChildren = [...children].sort((a, b) =>
             Number(containsActive.get(b)) - Number(containsActive.get(a))
           );
 
@@ -880,8 +880,8 @@
         const renderResultImages = () => {
           const images = getResultImages();
           if (images.length === 0) return '';
-          return '<div class="tool-images">' + 
+          return '<div class="tool-images">' +
-            images.map(img => `<img src="data:${img.mimeType};base64,${img.data}" class="tool-image" />`).join('') + 
+            images.map(img => `<img src="data:${img.mimeType};base64,${img.data}" class="tool-image" />`).join('') +
             '</div>';
         };
 
@@ -964,6 +964,22 @@
             }
             break;
           }
+          case 'ls': {
+            const dirPath = str(args.path);
+            const limit = args.limit;
+
+            let pathHtml = dirPath === null ? invalidArg : escapeHtml(shortenPath(dirPath || '.'));
+            if (limit !== undefined) {
+              pathHtml += ` <span class="line-count">(limit ${escapeHtml(String(limit))})</span>`;
+            }
+
+            html += `<div class="tool-header"><span class="tool-name">ls</span> <span class="tool-path">${pathHtml}</span></div>`;
+            if (result) {
+              const output = getResultText().trim();
+              if (output) html += formatExpandableOutput(output, 20);
+            }
+            break;
+          }
           default: {
             // Check for pre-rendered custom tool HTML
             const rendered = renderedTools?.[call.id];
@@ -974,7 +990,7 @@
               } else {
                 html += `<div class="tool-header"><span class="tool-name">${escapeHtml(name)}</span></div>`;
               }
-              
+
               if (rendered.resultHtmlCollapsed && rendered.resultHtmlExpanded && rendered.resultHtmlCollapsed !== rendered.resultHtmlExpanded) {
                 // Both collapsed and expanded differ - render expandable section
                 html += `<div class="tool-output expandable ansi-rendered" onclick="if(window.getSelection().toString())return;this.classList.toggle('expanded')">
@@ -1040,21 +1056,21 @@
         // Check for injected base URL (used when loaded in iframe via srcdoc)
         const baseUrlMeta = document.querySelector('meta[name="pi-share-base-url"]');
         const baseUrl = baseUrlMeta ? baseUrlMeta.content : window.location.href.split('?')[0];
-        
+
         const url = new URL(window.location.href);
         // Find the gist ID (first query param without value, e.g., ?abc123)
         const gistId = Array.from(url.searchParams.keys()).find(k => !url.searchParams.get(k));
-        
+
         // Build the share URL
         const params = new URLSearchParams();
         params.set('leafId', currentLeafId);
         params.set('targetId', entryId);
-        
+
         // If we have an injected base URL (iframe context), use it directly
         if (baseUrlMeta) {
           return `${baseUrl}&${params.toString()}`;
         }
-        
+
         // Otherwise build from current location (direct file access)
         url.search = gistId ? `?${gistId}&${params.toString()}` : `?${params.toString()}`;
         return url.toString();
@@ -1074,7 +1090,7 @@
         } catch (err) {
           // Clipboard API failed, try fallback
         }
-        
+
         // Fallback for HTTP or when Clipboard API is unavailable
         if (!success) {
           try {
@@ -1090,7 +1106,7 @@
             console.error('Failed to copy:', err);
           }
         }
-        
+
         if (success && button) {
           const originalHtml = button.innerHTML;
           button.innerHTML = '✓';
@@ -1138,7 +1154,7 @@
               }
             }
 
-            const text = typeof content === 'string' ? content : 
+            const text = typeof content === 'string' ? content :
               content.filter(c => c.type === 'text').map(c => c.text).join('\n');
             if (text.trim()) {
               html += `<div class="markdown-content">${safeMarkedParse(text)}</div>`;