fix: quote env values with spaces for safe shell sourcing

.env.example

@@ -65,7 +65,7 @@ ERYAO_STORAGE__RETENTION_DAYS=30
 # Feedback Report
 ############
 ERYAO_FEEDBACK_REPORT__EMAIL=support@example.com
-ERYAO_FEEDBACK_REPORT__CRON=0 10 * * *
+ERYAO_FEEDBACK_REPORT__CRON='0 10 * * *'
 ERYAO_FEEDBACK_REPORT__ENABLED=false
 
 ############
@@ -77,7 +77,7 @@ ERYAO_EMAIL__USERNAME=robot@xunmee.com
 ERYAO_EMAIL__PASSWORD=
 ERYAO_EMAIL__USE_SSL=true
 ERYAO_EMAIL__FROM_ADDRESS=robot@xunmee.com
-ERYAO_EMAIL__FROM_NAME=Eryao 反馈系统
+ERYAO_EMAIL__FROM_NAME='Eryao 反馈系统'
 
 ############
 # LLM API KEY
@@ -94,7 +94,7 @@ ERYAO_POINTS_POLICY__REGISTER_BONUS_HMAC_KEY=replace-with-strong-random-key
 ############
 # CORS 配置
 ############
-ERYAO_CORS__ALLOW_ORIGINS=["http://localhost", "http://localhost:3000"]
+ERYAO_CORS__ALLOW_ORIGINS='["http://localhost", "http://localhost:3000"]'
 
 ############
 # Test相关