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/scripts/complete-fix.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+# 完成修复任务脚本
+
+FIX_ID=$1
+if [ -z "$FIX_ID" ]; then
+    echo "Usage: complete-fix.sh FIX-XXX"
+    exit 1
+fi
+
+# 检查任务是否在进行中
+if [ ! -d ".fixes/in-progress/$FIX_ID" ]; then
+    echo "❌ 任务 $FIX_ID 不在 in-progress 中"
+    exit 1
+fi
+
+# 更新状态
+sed -i '' 's/状态.*$/状态: 已完成/' ".fixes/in-progress/$FIX_ID/README.md"
+sed -i '' "s/完成时间.*$/完成时间: $(date +%Y-%m-%d)/" ".fixes/in-progress/$FIX_ID/README.md"
+
+# 移动到 completed
+mv ".fixes/in-progress/$FIX_ID" ".fixes/completed/"
+
+# 更新进度日志
+echo "$(date +%Y-%m-%d) - $FIX_ID completed" >> .fixes/PROGRESS.md
+
+# 删除备份文件（确认已完成）
+if [ -f "pages/tool/ai-nutritionist.vue.backup" ]; then
+    rm "pages/tool/ai-nutritionist.vue.backup"
+    echo "🗑️  已清理备份文件"
+fi
+
+echo "✅ 任务 $FIX_ID 已完成"
+echo "📁 已移动到 .fixes/completed/$FIX_ID/"

msh_single_uniapp/.fixes/scripts/start-fix.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+# 开始修复任务脚本
+
+FIX_ID=$1
+if [ -z "$FIX_ID" ]; then
+    echo "Usage: start-fix.sh FIX-XXX"
+    exit 1
+fi
+
+# 检查任务是否存在
+if [ ! -f ".fixes/backlog/$FIX_ID.md" ]; then
+    echo "❌ 任务 $FIX_ID 不存在于 backlog"
+    exit 1
+fi
+
+# 创建任务工作目录
+mkdir -p ".fixes/in-progress/$FIX_ID"
+
+# 复制任务文件
+cp ".fixes/backlog/$FIX_ID.md" ".fixes/in-progress/$FIX_ID/README.md"
+
+# 更新状态
+sed -i '' 's/状态.*$/状态: 进行中/' ".fixes/in-progress/$FIX_ID/README.md"
+
+# 备份原文件
+if [ -f "pages/tool/ai-nutritionist.vue" ]; then
+    cp pages/tool/ai-nutritionist.vue "pages/tool/ai-nutritionist.vue.backup"
+    echo "✅ 已备份原文件"
+fi
+
+echo "✅ 任务 $FIX_ID 已启动"
+echo "📁 工作目录: .fixes/in-progress/$FIX_ID/"
+echo ""
+echo "下一步:"
+echo "1. 阅读 .fixes/in-progress/$FIX_ID/README.md"
+echo "2. 创建测试用例"
+echo "3. 实施修改"