refactor(web): portal to follow elem migration

[CodingOnStar]

Summary

replace portal-to-follow-elem to dify-ui

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

❌ Patch coverage is 85.93750% with 36 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.81%. Comparing base (c6a5de3) to head (3840394).

Files with missing lines	Patch %	Lines
...ig-modal/visual-editor/edit-card/type-selector.tsx	0.00%	8 Missing ⚠️
...odes/_base/components/variable/var-type-picker.tsx	0.00%	4 Missing ⚠️
...app/components/base/chat/chat/answer/operation.tsx	90.32%	3 Missing ⚠️
web/app/components/base/tooltip/index.tsx	93.87%	3 Missing ⚠️
...panel/subscription-list/edit/apikey-edit-modal.tsx	89.28%	3 Missing ⚠️
...-panel/subscription-list/edit/oauth-edit-modal.tsx	57.14%	3 Missing ⚠️
...lugins/plugin-detail-panel/tool-selector/index.tsx	50.00%	3 Missing ⚠️
...in-detail-panel/subscription-list/create/index.tsx	71.42%	2 Missing ⚠️
...se/chat/chat-with-history/sidebar/rename-modal.tsx	66.66%	1 Missing ⚠️
...l-provider-page/model-auth/credential-selector.tsx	90.00%	1 Missing ⚠️
... and 5 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #35892      +/-   ##
==========================================
- Coverage   85.83%   85.81%   -0.02%     
==========================================
  Files        4462     4456       -6     
  Lines      209154   208973     -181     
  Branches    39116    39088      -28     
==========================================
- Hits       179519   179328     -191     
- Misses      26460    26470      +10     
  Partials     3175     3175              

Flag	Coverage Δ
dify-ui	93.93% <ø> (ø)
web	86.73% <85.93%> (-0.04%)	⬇️

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