Add automated fix workflow for AI nutritionist page

- Create .fixes/ directory structure for tracking repairs
- Add FIX-001 to FIX-009 repair tasks based on Cursor review
- Add automation scripts (start-fix.sh, complete-fix.sh)
- Update HEARTBEAT.md with repair checklist
- Create AUTOMATION_PLAN.md with workflow documentation

Fixes address:
- Remove fake initial data
- Add clear chat button
- Split oversized component
- Optimize multi-image upload
- Fix scroll behavior
- Remove dead code
- Extract hardcoded config

msh_single_uniapp/.fixes/backlog/FIX-004-merge-multi-images.md

@@ -0,0 +1,18 @@
+# FIX-004: 多图合并为一轮对话
+
+**状态**: 待开始  
+**创建时间**: 2026-02-28  
+**优先级**: 中  
+**负责人**: msh-agent  
+
+---
+
+## 问题描述
+
+当前多图时每张单独一轮 Coze 对话，AI 回复会一条条出现，且无法把"多图+一句说明"作为同一上下文。
+
+---
+
+## 修复方案
+
+若 Coze 支持，一次 `additionalMessages` 里带多条（文本+多图），减少轮次、统一上下文。