improvement(files): match CSV/XLSX preview tables to the markdown table chrome

[waleedlatif1]

Summary

• Tables in the file viewer looked different depending on the file — CSV/XLSX previews had their own chrome (rounded outer frame, --surface-2 header, 13px body / 12px header, --text-secondary cells) while markdown files rendered tables through the rich markdown editor (full cell borders on --divider, --surface-4 header, 14px text)
• Extracted the markdown table chrome into a shared document-table.css and styled both surfaces from it; removed the custom DataTable styling
• The editor stylesheet keeps only its own concerns (table-layout: fixed for column resizing, prose block margin, cell paragraph reset); DataTable keeps only its edit affordances
• Added a jsdom test that loads the real shipped CSS and asserts the two surfaces resolve to the same cell padding/typography and are bordered/filled by one rule, so they can't drift again

Type of Change

• Bug fix

Testing

vitest file-viewer suite (575 tests) + typecheck green. New parity test verified to fail when the shared rule drops the prose selector, and when the editor stylesheet re-declares cell chrome.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• 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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1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
docs	Skipped		Jul 31, 2026 7:22pm

[cursor]

PR Summary

Low Risk
Presentation-only CSS consolidation in the file viewer with parity tests; no auth, data, or API changes.

Overview
CSV/XLSX previews and markdown tables in the file viewer now share one table look instead of divergent styling (preview-specific frame, smaller text, different header/cell colors).

Shared chrome lives in new document-table.css, imported by DataTable and the rich markdown editor. Duplicate table rules were removed from rich-markdown-editor.css; the editor keeps only table-specific behavior (table-layout: fixed, margins, cell paragraph reset). DataTable drops most Tailwind table styling and only adds edit hover/ring classes.

Regression guard: document-table.test.ts loads the real CSS and checks computed padding/typography parity plus a single shared rule for borders and header fill.

^{Reviewed by Cursor Bugbot for commit 3089ea8. Configure here.}

[greptile-apps]

Greptile Summary

Consolidates CSV, XLSX, and markdown table presentation into shared styling.

• Adds a common document-table.css stylesheet for cell borders, spacing, typography, wrapping, and header fill.
• Removes duplicated table chrome from the data-table component and markdown-editor stylesheet while retaining surface-specific behavior.
• Adds CSS parity tests covering both rendering surfaces.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/data-table.tsx	Replaces preview-specific table utility classes with shared document-table styling while retaining edit affordances.
apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/document-table.css	Defines the shared table chrome used by CSV, XLSX, and rich-markdown surfaces.
apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/document-table.test.ts	Verifies that both table surfaces resolve to the same typography, spacing, wrapping, borders, and header fill.
apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/rich-markdown-editor/rich-markdown-editor.css	Removes duplicated table chrome while retaining editor-specific layout and prose rules.
apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/rich-markdown-editor/rich-markdown-editor.tsx	Loads the shared table stylesheet before editor-specific styling.
apps/sim/app/workspace/[workspaceId]/files/components/file-viewer/rich-markdown-editor/rich-markdown-field.tsx	Loads the shared table stylesheet for standalone rich-markdown fields.

_{Reviews (2): Last reviewed commit: "fix(files): wrap unbreakable cell values..." | Re-trigger Greptile}

[waleedlatif1]

@greptile

[waleedlatif1]

@cursor review

[cursor]

✅ Bugbot reviewed your changes and found no new issues!

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^{Reviewed by Cursor Bugbot for commit 3089ea8. Configure here.}