refactor(web): migrate legacy tooltip to infotip

[lyzno1]

Summary

• migrate low-risk legacy overlay usages to dify-ui Tooltip, DropdownMenu, and Infotip/Popover primitives
• refactor checkbox-with-label layouts to avoid infotip hover layout shifts while preserving checkbox labeling semantics
• migrate LLM node field and structured-output help overlays with semantic Tooltip vs Infotip usage
• shrink the legacy overlay ESLint allowlist from 15 entries to 6

Review notes

• Info-icon triggers that exist only to reveal help content use Infotip/Popover semantics.
• Existing controls with their own primary action, such as badges or warning/status icons, keep Tooltip semantics.
• Theme selector uses Base UI DropdownMenu radio items with explicit closeOnClick.

[codecov]

Codecov Report

❌ Patch coverage is 92.64706% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.67%. Comparing base (81090ef) to head (a0dafc4).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...rkflow/nodes/llm/components/config-prompt-item.tsx	0.00%	2 Missing ⚠️
...mponents/app/configuration/config-vision/index.tsx	0.00%	1 Missing ⚠️
...eate/step-two/components/indexing-mode-section.tsx	92.30%	1 Missing ⚠️
...ts/workflow/nodes/_base/components/option-card.tsx	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #35774      +/-   ##
==========================================
- Coverage   85.67%   85.67%   -0.01%     
==========================================
  Files        4458     4458              
  Lines      209000   208999       -1     
  Branches    39044    39047       +3     
==========================================
- Hits       179059   179057       -2     
- Misses      26777    26780       +3     
+ Partials     3164     3162       -2     

Flag	Coverage Δ
dify-ui	93.01% <ø> (ø)
web	86.45% <92.64%> (-0.01%)	⬇️

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