refactor: remove duplicate exportConversation module, consolidate into exportChat

src/components/Chat.tsx

@@ -9,7 +9,7 @@ import { useT } from '../hooks/useLocale';
 import { getLocale, type TranslationKey } from '../lib/i18n';
 import { useToolCollapse } from '../hooks/useToolCollapse';
 import { useBookmarks } from '../hooks/useBookmarks';
-import { exportAsMarkdown, downloadFile } from '../lib/exportConversation';
+import { messagesToMarkdown, downloadFile } from '../lib/exportChat';
 
 interface Props {
   messages: ChatMessage[];
@@ -215,7 +215,7 @@ export function Chat({ messages, isGenerating, isLoadingHistory, status, session
 
   const handleExport = useCallback(() => {
     const label = sessionKey?.replace(/^agent:[^:]+:/, '') || 'conversation';
-    const md = exportAsMarkdown(messages, label);
+    const md = messagesToMarkdown(messages, label);
     const safeLabel = label.replace(/[^a-zA-Z0-9_-]/g, '_').slice(0, 40);
     downloadFile(md, `${safeLabel}-${new Date().toISOString().slice(0, 10)}.md`);
   }, [messages, sessionKey]);

src/lib/__tests__/exportConversation.test.ts

@@ -1,87 +0,0 @@
-import { describe, it, expect } from 'vitest';
-import { exportAsMarkdown } from '../exportConversation';
-import type { ChatMessage } from '../../types';
-
-function makeMsg(
-  role: 'user' | 'assistant',
-  content: string,
-  blocks: ChatMessage['blocks'] = [],
-): ChatMessage {
-  return { id: `msg-${Math.random()}`, role, content, timestamp: 1700000000000, blocks };
-}
-
-describe('exportAsMarkdown', () => {
-  it('exports a basic user + assistant exchange', () => {
-    const msgs = [
-      makeMsg('user', 'Hello'),
-      makeMsg('assistant', 'Hi there!'),
-    ];
-    const md = exportAsMarkdown(msgs);
-    expect(md).toContain('# Conversation');
-    expect(md).toContain('### 👤 User');
-    expect(md).toContain('Hello');
-    expect(md).toContain('### 🤖 Assistant');
-    expect(md).toContain('Hi there!');
-  });
-
-  it('uses custom session label as title', () => {
-    const md = exportAsMarkdown([], 'My Session');
-    expect(md).toContain('# My Session');
-  });
-
-  it('renders text blocks', () => {
-    const msgs = [
-      makeMsg('assistant', '', [{ type: 'text', text: 'Block content' }]),
-    ];
-    const md = exportAsMarkdown(msgs);
-    expect(md).toContain('Block content');
-  });
-
-  it('renders thinking blocks in details tags', () => {
-    const msgs = [
-      makeMsg('assistant', '', [{ type: 'thinking', text: 'Deep thought' }]),
-    ];
-    const md = exportAsMarkdown(msgs);
-    expect(md).toContain('<details>');
-    expect(md).toContain('💭 Thinking');
-    expect(md).toContain('Deep thought');
-    expect(md).toContain('</details>');
-  });
-
-  it('renders tool_use blocks with JSON', () => {
-    const msgs = [
-      makeMsg('assistant', '', [{ type: 'tool_use', name: 'exec', input: { command: 'ls' }, id: 't1' }]),
-    ];
-    const md = exportAsMarkdown(msgs);
-    expect(md).toContain('**🔧 Tool: `exec`**');
-    expect(md).toContain('"command": "ls"');
-  });
-
-  it('renders tool_result blocks truncated', () => {
-    const longContent = 'x'.repeat(3000);
-    const msgs = [
-      makeMsg('assistant', '', [{ type: 'tool_result', content: longContent, toolUseId: 't1' }]),
-    ];
-    const md = exportAsMarkdown(msgs);
-    expect(md).toContain('**📋 Result:**');
-    expect(md).toContain('...(truncated)');
-    // Should have at most 2000 chars of content + truncation
-    const resultLine = md.split('\n').find(l => l.startsWith('xxx'));
-    expect(resultLine!.length).toBeLessThanOrEqual(2000);
-  });
-
-  it('renders compaction separator', () => {
-    const msgs: ChatMessage[] = [
-      { id: 'sep', role: 'assistant', content: '', timestamp: 0, blocks: [], isCompactionSeparator: true },
-    ];
-    const md = exportAsMarkdown(msgs);
-    expect(md).toContain('---');
-    expect(md).toContain('*Context compacted*');
-  });
-
-  it('falls back to content when no blocks', () => {
-    const msgs = [makeMsg('user', 'Plain text')];
-    const md = exportAsMarkdown(msgs);
-    expect(md).toContain('Plain text');
-  });
-});

src/lib/exportConversation.ts

@@ -1,79 +0,0 @@
-import type { ChatMessage } from '../types';
-
-/**
- * Export conversation messages as a Markdown string.
- */
-export function exportAsMarkdown(messages: ChatMessage[], sessionLabel?: string): string {
-  const lines: string[] = [];
-  const title = sessionLabel || 'Conversation';
-  lines.push(`# ${title}`);
-  lines.push(`> Exported from PinchChat on ${new Date().toLocaleString()}`);
-  lines.push('');
-
-  for (const msg of messages) {
-    if (msg.isCompactionSeparator) {
-      lines.push('---');
-      lines.push('*Context compacted*');
-      lines.push('---');
-      lines.push('');
-      continue;
-    }
-
-    const ts = msg.timestamp ? new Date(msg.timestamp).toLocaleString() : '';
-    const roleLabel = msg.role === 'user' ? '👤 User' : msg.role === 'assistant' ? '🤖 Assistant' : '⚙️ System';
-    const header = ts ? `### ${roleLabel} — ${ts}` : `### ${roleLabel}`;
-    lines.push(header);
-    lines.push('');
-
-    // Render blocks
-    for (const block of msg.blocks) {
-      if (block.type === 'text') {
-        lines.push(block.text);
-        lines.push('');
-      } else if (block.type === 'thinking') {
-        lines.push('<details>');
-        lines.push('<summary>💭 Thinking</summary>');
-        lines.push('');
-        lines.push(block.text);
-        lines.push('</details>');
-        lines.push('');
-      } else if (block.type === 'tool_use') {
-        const input = typeof block.input === 'string' ? block.input : JSON.stringify(block.input, null, 2);
-        lines.push(`**🔧 Tool: \`${block.name}\`**`);
-        lines.push('```json');
-        lines.push(input);
-        lines.push('```');
-        lines.push('');
-      } else if (block.type === 'tool_result') {
-        lines.push('**📋 Result:**');
-        lines.push('```');
-        lines.push(block.content.slice(0, 2000) + (block.content.length > 2000 ? '\n...(truncated)' : ''));
-        lines.push('```');
-        lines.push('');
-      }
-    }
-
-    // Fallback to content if no blocks
-    if (msg.blocks.length === 0 && msg.content) {
-      lines.push(msg.content);
-      lines.push('');
-    }
-  }
-
-  return lines.join('\n');
-}
-
-/**
- * Download text as a file.
- */
-export function downloadFile(content: string, filename: string, mimeType = 'text/markdown') {
-  const blob = new Blob([content], { type: mimeType });
-  const url = URL.createObjectURL(blob);
-  const a = document.createElement('a');
-  a.href = url;
-  a.download = filename;
-  document.body.appendChild(a);
-  a.click();
-  document.body.removeChild(a);
-  URL.revokeObjectURL(url);
-}