feat(collapse): [collapse] add dark theme

[wuyiping0628]

PR

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• The commit message follows our Commit Message Guidelines
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PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

Summary by CodeRabbit

• Style
  • Updated the dark mode link color to a fresher, more vibrant shade for improved visual appeal.

[coderabbitai]

Walkthrough

This pull request updates the link color in the dark theme by modifying a CSS variable in the dark theme stylesheet. The variable --tv-color-text-link is now set to reference var(--tv-base-color-brand-8) (color #5291FF) instead of the previous var(--tv-base-color-brand-6) (color #326DE3). The adjustment refines the visual representation of link elements without altering the overall file structure.

Changes

File	Summary
packages/.../dark-theme.less	Updated the --tv-color-text-link value from var(--tv-base-color-brand-6) to var(--tv-base-color-brand-8), changing link color styling.

Possibly related PRs

• fix: fix tabs background color style in dark mode #2960: Modifies background colors in dark mode using similar CSS variable techniques for link styling.
• feat(site): the official website adds the function of dynamically switching between light and dark themes #2911: Involves dark theme selector adjustments in components, aligning with the CSS variable update.
• fix(site): official website adapts to the dark mode. #2956: Updates various dark mode styles through CSS variable modifications, directly related to this change.

Suggested Reviewers

• zzcr
• shenjunjian

Poem

I hopped through the dark with code so bright,
Tweaking colors in the theme through night.
From brand six to eight, a gentle change I sing,
With every updated link, new vibrance I bring.
Hopping on stylish trails with a joyful cheer,
A rabbit's ode to code that makes the theme clear!

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[coderabbitai]

Actionable comments posted: 0

🧹 Nitpick comments (1)

packages/theme/src/base/dark-theme.less (1)

305-306: Verify Link Color Consistency in Dark Theme

The change at line 305 updates the variable --tv-color-text-link to use var(--tv-base-color-brand-8) (resulting in the color #5291FF) for the dark theme's default link color. Please confirm that this new color complies with the design guidelines for the dark theme.

Additionally, note that the hover state (line 306) still uses var(--tv-base-color-brand-6) (i.e., #326DE3). Verify whether this inconsistency is intentional or if the hover state should also be updated to harmonize with the new link color.

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📥 Commits

Reviewing files that changed from the base of the PR and between 48b8bcc and 3c38505.

📒 Files selected for processing (1)

• packages/theme/src/base/dark-theme.less (1 hunks)

⏰ Context from checks skipped due to timeout of 90000ms (1)

• GitHub Check: PR E2E Test (pnpm test:e2e3)