fix(web): name prompt generator action

[lyzno1]

Summary

• give the workflow prompt generator action a localized accessible name
• hide the generator glyph from the accessibility tree
• add a behavior test that finds the real ActionButton by name and opens the generator dialog

Ownership and scope

PromptGeneratorBtn owns the action and the transition that opens GetAutomaticResModal. The test keeps the ActionButton and state transition real while mocking the modal and workflow store as external boundaries. Prompt generation requests, modal contents, editor values, and shared primitives are unchanged.

Visual regression review

This is an ARIA-only production change. The rendered ActionButton, classes, dimensions, glyph, color, and click path are unchanged.

Please verify:

• 16px generator glyph shape, primary color, and alignment
• ActionButton box geometry
• hover, active, and focus-visible states
• no shift in the surrounding prompt editor controls

Validation

• regression proof: the new semantic test failed against the unnamed baseline
• focused Vitest: 1/1 passed after the fix
• standalone accessibility lint: 0 findings
• focused format/lint/type check: 0 errors, 1 existing icon warning
• full pnpm check: 0 errors, 2059 existing warnings
• git diff --check: passed

Rollback

Revert this PR alone to remove the accessible name and its behavior test. Prompt generation behavior and modal implementation are unaffected.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.43%. Comparing base (7522ae1) to head (e764625).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #40328      +/-   ##
==========================================
- Coverage   86.47%   86.43%   -0.04%     
==========================================
  Files        5264     5107     -157     
  Lines      294867   290742    -4125     
  Branches    59029    57924    -1105     
==========================================
- Hits       254976   251304    -3672     
+ Misses      34950    34497     -453     
  Partials     4941     4941              

Flag	Coverage Δ
cli	?
dify-ui	93.49% <ø> (ø)
web	86.12% <100.00%> (+0.01%)	⬆️

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