Smarty の Warning を抑制する

[nanasess]

refs #1045

• muteUndefinedOrNullWarnings() で Smarty の Warning を抑制する
• Warning の発生状況を確認するため、 data/logs 以下のログを常に保存するよう修正

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 51.70%. Comparing base (c2b3853) to head (dc7a677).
Report is 8 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1058   +/-   ##
=======================================
  Coverage   51.70%   51.70%           
=======================================
  Files          80       80           
  Lines       10222    10223    +1     
=======================================
+ Hits         5285     5286    +1     
  Misses       4937     4937           

Flag	Coverage Δ
tests	51.70% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.