refactor(web): migrate rich tooltip overlays

[lyzno1]

Summary

• migrate rich legacy tooltip overlays to semantic Popover/Dialog primitives
• keep short icon labels on the new dify-ui Tooltip primitive
• split the Jinja infotip trigger from its switch so toggling does not open the popup

Testing

• pnpm -C web type-check
• pnpm -C web test app/components/datasets/external-api/external-api-modal/tests/index.spec.tsx
• git diff --check

[codecov]

Codecov Report

❌ Patch coverage is 69.09091% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.68%. Comparing base (6fafeec) to head (1a14f1d).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
.../workflow/nodes/_base/components/prompt/editor.tsx	0.00%	7 Missing ⚠️
...p/configuration/config/agent/agent-tools/index.tsx	50.00%	3 Missing ⚠️
web/app/components/app/overview/app-card.tsx	80.00%	3 Missing ⚠️
...datasets/external-api/external-api-modal/index.tsx	83.33%	3 Missing ⚠️
web/app/components/tools/mcp/mcp-service-card.tsx	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #35675      +/-   ##
==========================================
- Coverage   85.68%   85.68%   -0.01%     
==========================================
  Files        4459     4459              
  Lines      209019   209034      +15     
  Branches    39079    39093      +14     
==========================================
+ Hits       179102   179112      +10     
- Misses      26751    26756       +5     
  Partials     3166     3166              

Flag	Coverage Δ
dify-ui	93.01% <ø> (ø)
web	86.48% <69.09%> (-0.01%)	⬇️

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