refactor(web): migrate workflow node actions menu

[lyzno1]

Summary

• move workflow node actions out of the legacy panel-operator implementation into node-actions-menu
• split dropdown and context menu content so each overlay uses its own primitive
• update node context menu positioning to use client coordinates with Base UI context menu anchoring

Tests

• pnpm test app/components/workflow/node-actions-menu/tests/index.spec.tsx app/components/workflow/node-actions-menu/tests/details.spec.tsx app/components/workflow/tests/node-contextmenu.spec.tsx app/components/workflow/tests/workflow-edge-events.spec.tsx app/components/workflow/nodes/_base/components/tests/node-control.spec.tsx app/components/workflow/nodes/_base/components/workflow-panel/tests/index.spec.tsx app/components/workflow/store/tests/workflow-store.spec.ts app/components/workflow/hooks/tests/use-panel-interactions.spec.ts app/components/workflow/hooks/tests/use-selection-interactions.spec.ts app/components/workflow/hooks/tests/use-nodes-interactions.spec.ts

[codecov]

Codecov Report

❌ Patch coverage is 77.77778% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.66%. Comparing base (81090ef) to head (c694aae).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...orkflow/node-actions-menu/context-menu-content.tsx	0.00%	25 Missing ⚠️
...w/node-actions-menu/use-node-actions-menu-model.ts	97.36%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #35785      +/-   ##
==========================================
- Coverage   85.67%   85.66%   -0.01%     
==========================================
  Files        4458     4461       +3     
  Lines      209000   209037      +37     
  Branches    39044    39067      +23     
==========================================
+ Hits       179059   179073      +14     
- Misses      26777    26800      +23     
  Partials     3164     3164              

Flag	Coverage Δ
dify-ui	93.01% <ø> (ø)
web	86.43% <77.77%> (-0.03%)	⬇️

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