fix: back to text format with flushHeaders+heartbeat

server.js

@@ -44,29 +44,13 @@ app.post('/api/chat', (req, res) => {
     // heartbeat to keep connection alive during long generation
     const heartbeat = setInterval(() => res.write(': ping\n\n'), 15000);
 
-    const proc = spawn(CLAUDE_BIN, ['-p', text, '--model', modelId, '--output-format', 'stream-json', '--verbose'], {
+    const proc = spawn(CLAUDE_BIN, ['-p', text, '--model', modelId, '--output-format', 'text'], {
         env,
         stdio: ['ignore', 'pipe', 'pipe'],
     });
 
-    let buf = '';
     proc.stdout.on('data', (chunk) => {
-        buf += chunk.toString();
-        const lines = buf.split('\n');
-        buf = lines.pop();
-        for (const line of lines) {
-            if (!line.trim()) continue;
-            try {
-                const obj = JSON.parse(line);
-                if (obj.type === 'assistant' && obj.message?.content) {
-                    for (const block of obj.message.content) {
-                        if (block.type === 'text') res.write(`data: ${JSON.stringify({ text: block.text })}\n\n`);
-                    }
-                } else if (obj.type === 'result' && obj.is_error) {
-                    res.write(`data: ${JSON.stringify({ error: obj.result || 'error' })}\n\n`);
-                }
-            } catch (e) {}
-        }
+        res.write(`data: ${JSON.stringify({ text: chunk.toString() })}\n\n`);
     });
 
     let stderrBuf = '';