chore: Adjust agent chat code elements

[ichik]

Description

Fixes #39836

Before	After

Automation

/ok-to-test tags="@tag.Sanity"

🔍 Cypress test results

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🟢 🟢 🟢 All cypress tests have passed! 🎉 🎉 🎉
Workflow run: https://github.com/appsmithorg/appsmith/actions/runs/14445809985
Commit: 713a98e
Cypress dashboard.
Tags: @tag.Sanity
Spec:

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Mon, 14 Apr 2025 13:21:07 UTC

Communication

Should the DevRel and Marketing teams inform users about this change?

• Yes
• No

Summary by CodeRabbit

• Style
  • Enhanced dark mode visuals for a more consistent and refined appearance.
  • Upgraded code block styling with improved typography, spacing, and clearer syntax highlighting.
  • Adjusted the appearance of the code-copy button with a neutral color scheme.
  • Optimized the responsive design for the sidebar to deliver a smoother mobile experience.
  • Updated styling for list items and code components, including margin adjustments and font size specifications.

[coderabbitai]

Walkthrough

This pull request modifies theming and styling across several design-system components. In the dark mode theme file, the elevation color calculations are simplified by using fixed lightness adjustments. The code block component now applies the "body" typography class with an additional custom styling class, and the clipboard button gains a neutral color property. CSS adjustments update various code element styles including margins, font-size, text color, outline, and border-radius. Additionally, the sidebar breakpoint constant is lowered from 768 to 720 to adjust responsive behavior.

Changes

Files	Change Summary
design-system/theming/.../DarkModeTheme.ts	Simplified elevation color calculations: removed conditional checks and applied fixed lightness adjustments (bdElevation1: -0.39, bdElevation2: +0.07, bdElevation3: +0.05).
design-system/widgets/.../CodeBlock.tsx, design-system/widgets/.../mdComponents/Code.tsx	Updated code block components: changed typography class from "caption" to "body" and added "wds-codeblock" class for CodeBlock; introduced a new color="neutral" property for the copy button in Code.
design-system/widgets/.../styles.module.css	Refined code element styling: updated outline colors, set margins for .wds-codeblock, applied font-size of 0.85em, changed text color from var(--color-fg-negative) to var(--color-fg-accent), and adjusted border-radius.
design-system/widgets/.../Sidebar/src/constants.ts	Updated the MOBILE_BREAKPOINT constant in the sidebar configuration from 768 to 720.

Sequence Diagram(s)

(No sequence diagram generated as the changes do not alter control flow or introduce new interactive features.)

Assessment against linked issues

Objective	Addressed	Explanation
Inline code styling (size, color, corner radius) [#39836: items 1-3]	✅
Block code theming and layout (text size, scrolling, viewport space, indentation) [#39836: items 4-7]	❓	Text size is improved via typography change, but layout issues (scrolling, space, indentation) are not clearly addressed.

Suggested labels

Enhancement, Bug

Suggested reviewers

• hetunandu
• jsartisan

Poem

In lines of code, a fresh design is spun,
Where dark mode hues and fonts now run.
Elevated colors with fixed measures gleam,
And code blocks shine with a brand new theme.
With tweaks that spark a subtle art,
CodeRabbit cheers—a masterpiece at heart!

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📜 Recent review details

Configuration used: .coderabbit.yaml
Review profile: CHILL
Plan: Pro (Legacy)

📥 Commits

Reviewing files that changed from the base of the PR and between d93e974 and 713a98e.

📒 Files selected for processing (1)

• app/client/packages/design-system/widgets/src/components/Markdown/src/styles.module.css (1 hunks)

🚧 Files skipped from review as they are similar to previous changes (1)

• app/client/packages/design-system/widgets/src/components/Markdown/src/styles.module.css

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[ichik]

This