fix: improve AI response JSON parsing robustness

vite.config.ts

@@ -118,7 +118,9 @@ function apiSavePlugin() {
               let resolvedSessionId = sessionId
               let aiText = ''
 
-              for (const line of stdout.trim().split('\n')) {
+              for (const rawLine of stdout.split(/\r?\n/)) {
+                const line = rawLine.trim()
+                if (!line) continue
                 try {
                   const event = JSON.parse(line)
                   if (!resolvedSessionId && event.sessionID) resolvedSessionId = event.sessionID
@@ -129,16 +131,16 @@ function apiSavePlugin() {
               }
 
               if (mode === 'json') {
-                const jsonMatch = aiText.match(/```json\n?([\s\S]*?)\n?```/)
+                const codeBlock = aiText.match(/```(?:json)?\s*\n?([\s\S]*?)\n?\s*```/)
-                const jsonStr = jsonMatch ? jsonMatch[1] : aiText
+                let jsonStr = codeBlock ? codeBlock[1] : aiText
                 try {
                   JSON.parse(jsonStr)
+                } catch {
+                  const bareMatch = aiText.match(/(\{[\s\S]*\}|\[[\s\S]*\])/)
+                  jsonStr = bareMatch ? bareMatch[0] : aiText
+                }
                 res.writeHead(200, { 'Content-Type': 'application/json' })
                 res.end(JSON.stringify({ result: jsonStr, sessionId: resolvedSessionId || '' }))
-                } catch {
-                  res.writeHead(500)
-                  res.end(JSON.stringify({ error: 'invalid JSON returned', raw: stdout }))
-                }
               } else {
                 res.writeHead(200, { 'Content-Type': 'application/json' })
                 res.end(JSON.stringify({ result: aiText || 'done', sessionId: resolvedSessionId || '' }))