fix: install failed plugin dose not show icon

[iamjoel]

Checklist

• This change requires a documentation update, included: Dify Document
• I understand that this PR may be closed in case there was no previous discussion or issues. (This doesn't apply to typos!)
• I've added a test for each change that was introduced, and I tried as much as possible to make a single atomic change.
• I've updated the documentation accordingly.
• I ran make lint && make type-check (backend) and cd web && pnpm exec vp staged (frontend) to appease the lint gods

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.74%. Comparing base (a180ab1) to head (36b955f).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #36811      +/-   ##
==========================================
- Coverage   85.75%   85.74%   -0.01%     
==========================================
  Files        4546     4546              
  Lines      222191   222195       +4     
  Branches    40927    40930       +3     
==========================================
- Hits       190533   190531       -2     
- Misses      27990    27996       +6     
  Partials     3668     3668              

Flag	Coverage Δ
dify-ui	95.57% <ø> (ø)
web	86.45% <100.00%> (-0.01%)	⬇️

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