chore: gitignore 新增自动生成文件过滤

- 新增: automation/backups/ research/ automation/images/
- 新增: search_cache.json trends.json sustainability_cases.json
- untrack: 上述文件从 git 追踪中移除

.gitignore

@@ -46,6 +46,7 @@ sessions/
 .cache/
 
 # Project specific
+automation/backups/
 automation/data/drafts/*
 !automation/data/drafts/.gitkeep
 automation/data/releases/*
@@ -57,8 +58,12 @@ content/published/*
 automation/data/outlines/
 automation/data/research/
 automation/data/sustainability_raw/
-automation/images/generated/
+automation/data/search_cache.json
+automation/data/trends.json
+automation/data/sustainability_cases.json
+automation/images/
 data/*.db
 *.db
 automation/data/mcp_*.json
 automation/data/*_session.txt
+research/