fix(web): name chat settings triggers

[lyzno1]

Summary

• give both ViewFormDropdown triggers the existing localized View chat settings name
• hide each glyph from the accessibility tree
• query both chat surfaces by role and accessible name
• verify the Base UI popover transition through aria-expanded
• keep the ActionButton content model valid with an inline span

Review boundary

This is one duplicated user-facing contract across chat-with-history and embedded-chatbot. Form fields, validation, submission, popover ownership, handlers, classes, and layout are unchanged. The unused test id removed from the touched trigger is not replaced.

Verification

• two owner suites: 4/4 passed
• standalone a11y lint on both production files: 0 diagnostics
• full static check: 0 errors
• diff check: passed

Visual regression review

Only ARIA attributes and an inline div-to-span content-model correction change in production. Geometry, icons, alignment, placement, hover, and open states remain unchanged.

Dependency and rollback

Independent root layer and sole owner of these two trigger names.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.43%. Comparing base (7522ae1) to head (56bfe8b).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #40341      +/-   ##
==========================================
- Coverage   86.47%   86.43%   -0.04%     
==========================================
  Files        5264     5107     -157     
  Lines      294867   290742    -4125     
  Branches    59029    57924    -1105     
==========================================
- Hits       254976   251293    -3683     
+ Misses      34950    34508     -442     
  Partials     4941     4941              

Flag	Coverage Δ
cli	?
dify-ui	93.49% <ø> (ø)
web	86.11% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.