refactor(web): keep copy id events on the button

[lyzno1]

Summary

• Move click propagation ownership from the non-interactive layout wrapper to the existing, named copy button.
• Exercise the public button role and accessible name in the propagation test instead of querying a CSS wrapper.
• Prune the four exact jsx-a11y suppressions that are no longer needed across production code and its test.

Behavior contract

• Activating the copy button still copies the tool ID and updates the existing copied feedback.
• A copy-button activation does not trigger an ancestor click action.
• The outer wrapper owns layout and mouse-leave feedback only.
• The wrapper's 2 px bottom padding is no longer treated as an interaction surface.

Visual regression review

No element tag, class, style, node order, text, or icon changed. This PR only moves an event handler and updates its test, so default, hover, and copied-state geometry remain unchanged.

Validation

• Red: the focused accessibility lint reported click-events-have-key-events and no-static-element-interactions on the wrapper before the refactor.
• pnpm exec vp check app/components/workflow/nodes/tool/components/copy-id.tsx app/components/workflow/nodes/tool/components/__tests__/copy-id.spec.tsx
• node scripts/lint-a11y.mjs app/components/workflow/nodes/tool/components/copy-id.tsx
• pnpm exec vp test run app/components/workflow/nodes/tool/components/__tests__/copy-id.spec.tsx (2/2)
• pnpm check (0 errors; 2059 existing warnings)

From Codex

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.41%. Comparing base (e036075) to head (6a0aa04).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #40247      +/-   ##
==========================================
- Coverage   86.41%   86.41%   -0.01%     
==========================================
  Files        5107     5107              
  Lines      290731   290730       -1     
  Branches    57917    57917              
==========================================
- Hits       251245   251244       -1     
  Misses      34545    34545              
  Partials     4941     4941              

Flag	Coverage Δ
dify-ui	93.49% <ø> (ø)

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