improvement(emcn): refine shared menu and picker styling

[waleedlatif1]

Summary

• Refine dropdowns, picker lists, and popovers with shared menu styles while preserving comfortable 28px rows and existing chip geometry and color tokens.
• Align search fields, separators, elevation, and selection checks across chip pickers, date/time popovers, breadcrumb menus, and table-view menus.
• Remove consumer chrome overrides and update component guidance to document the shared tokens.

Type of Change

• Improvement

Testing

• Cleanup: effects, state, memo, callback, React Query, URL-state, EMCN design, and comment passes.
• bun run --cwd packages/emcn test and root bun run test.
• bun run lint, bun run type-check, bun run check:audits, bun run docs-manifest:check, and the block-registry check against origin/staging.
• Regenerated documentation manifests, agent documentation, and skill mirrors; verified workflows with actionlint 1.7.12.
• Checked the component preview in light/dark mode, including search, keyboard selection, grouped options, and multi-select.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing (new tests pass the test-audit authoring gate)
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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Project	Deployment	Actions	Updated
docs	Ready	Preview	Oct 9, 2026 5:10am UTC

[waleedlatif1]

@greptile

[waleedlatif1]

@cubic-dev-ai review this PR

[cubic-dev-ai]

@cubic-dev-ai review this PR

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[cubic-dev-ai]

No issues found across 14 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Turn on auto-fix | Re-trigger cubic}

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge; no actionable issues were found.

Summary

This PR brings menus, picker lists, and popovers onto shared MENU_STYLES tokens.

• Aligns surfaces, search fields, headings, separators, and selection checks.
• Removes local styling overrides from breadcrumb and table-view menus.
• Adds private imports for shared tokens and updates component guidance.
• No actionable issues were found in the reviewed changes.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  C["Chip tokens"] --> M["MENU_STYLES"]
  M --> D["DropdownMenu"]
  M --> P["Popover"]
  M --> B["Combobox"]
  M --> S["Chip pickers"]
  P --> V["Breadcrumb and view menus"]
  P --> T["TimePicker"]

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_{Reviews (1) · Last reviewed commit: "improvement(emcn): refine shared menu an..." · Reviewed by Greptile}