refactor(ui): centralize bulk-action buttons in EMCN

[BillLeoutsakosvl346]

Resource, knowledge-document and table-cell selection bars supplied the same bulk-action appearance through application class strings. Add EMCN's BulkActionButton, built on the existing Button, and migrate all six authored button locations across the three implementations. EMCN now owns the 28px geometry, radius, zero padding and brand hover treatment; the application styling helper is removed.

The default surface='adaptive' preserves the resource/knowledge light and dark chip backgrounds. surface='uniform' preserves the table buttons' existing surface-5 background in both themes. The component requires an accessible label and forwards native button props and refs. Icons, labels, handlers, disabled conditions, tooltips, the Move menu trigger, native form behavior, selection/permission logic and animations are preserved.

Validation:

• Exact before/after class comparison at all six locations and normalized consumer AST comparison confirm unchanged styling and surrounding behavior code. DOM compatibility tests cover the default and both explicit surfaces; focused tests cover refs, events, focus, disabled actions, default/non-submitting form behavior and actual tooltip/menu-trigger composition. The surface checks run once each, with disabled behavior covered separately. No screenshot comparison was performed.
• 330 EMCN tests (including 9 focused component tests), 71 related app tests, EMCN/app type checks, repository lint, API validation and diff whitespace checks pass.
• The external category check now requires actual EMCN ownership: six application-owned locations become six central consumers, with zero remaining category findings, copied patterns, unresolved candidates or consumer appearance overrides. Its 13 regression tests and type checks pass. Existing limits remain explicit, including two oversized generated sources and unresolved class inputs elsewhere.
• The final committed PR-diff audit completes with zero violations and zero introduced findings in the three earlier simplification categories. It reports ten intentional central-definition changes for the new recipe: default surface, dimensions, padding, radius and existing background/hover colors. These migrate established styling into EMCN; the class-equivalence checks cover all six consumers.
• Generic audit counts change because six Button consumers now use BulkActionButton. The dedicated category check validates their central ownership, labels, surface choices and appearance overrides; the generic scanner still cannot fully resolve the new component's dynamic props/class forwarding. No global conformance claim is made.

The cumulative PR contains only three consumer updates, the EMCN component, its export and its component tests. All linter code, checker tests, configuration and audit artifacts remain outside the PR.

[cubic-dev-ai]

No issues found across 4 files

Confidence score: 5/5

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

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[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge because the centralized component preserves the existing action-button contracts and no actionable regressions remain.

Summary

This PR centralizes the shared selection-bar action-button presentation in EMCN without changing consumer behavior.

• Adds an accessible, ref-forwarding BulkActionButton with adaptive and uniform surface variants.
• Migrates resource, knowledge-document, and table-cell action bars to the shared component.
• Preserves existing handlers, disabled states, tooltips, menu-trigger composition, geometry, and theme-specific surfaces.
• Adds focused tests for styling equivalence, native button behavior, refs, events, accessibility, and trigger composition.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  R[Resource action bar] --> B[EMCN BulkActionButton]
  K[Knowledge action bar] --> B
  T[Table action bar] --> U[BulkActionButton<br/>surface=uniform]
  B --> A[Adaptive chip surface]
  U --> S[Uniform surface-5]
  A --> C[EMCN Button<br/>ghost / md]
  S --> C

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[BillLeoutsakosvl346]

@greptileai please review this PR at the latest commit, 86af6a9. The bulk-action button implementation now lives in EMCN.

[BillLeoutsakosvl346]

@cubic-dev-ai review this PR at the latest commit, 86af6a9. The bulk-action button implementation now lives in EMCN.

[cubic-dev-ai]

@cubic-dev-ai review this PR at the latest commit, 86af6a9. The bulk-action button implementation now lives in EMCN.

@BillLeoutsakosvl346 I have started the AI code review. It will take a few minutes to complete.

[cubic-dev-ai]

No issues found across 6 files

Confidence score: 5/5

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

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