fix(button): [button]set svg size when button is only icon

[shenjunjian]

PR

PR Checklist

Please check if your PR fulfills the following requirements:

• [ ] The commit message follows our Commit Message Guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

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

• New Features

  • Introduced dynamic icon sizing for buttons based on their size, ensuring consistent design when only icons are displayed.
  • Added specific CSS custom properties for icon font sizes across various button sizes (default, large, medium, small, mini).

• Bug Fixes

  • Enhanced button styling capabilities for improved visual consistency.

[coderabbitai[bot]]

Walkthrough

The changes in this pull request enhance the button component's styling capabilities by introducing new variables for icon sizes in the index.less and vars.less files. Specifically, a new variable @iconSize is added to the button's size mixin, allowing dynamic sizing of icons based on button size. Additionally, several CSS custom properties are defined for different button sizes, ensuring consistent icon dimensions across various button types. The overall structure of the existing styles remains unchanged.

Changes

File Path	Change Summary
packages/theme/src/button/index.less	Added variable @iconSize to .size-mixin(@size) for dynamic icon sizing in .is-only-icon state.
packages/theme/src/button/vars.less	Introduced new CSS custom properties for button icon sizes: --tv-Button-size-icon-font-size, --tv-Button-size-icon-font-size-large, --tv-Button-size-icon-font-size-medium, --tv-Button-size-icon-font-size-small, and --tv-Button-size-icon-font-size-mini.

Possibly related PRs

• #2148: Modifies the button component's index.less and vars.less, directly related to button styling and icon sizing.
• #2235: Introduces new CSS variables for the ghost button state, modifying vars.less and index.less, relevant to overall button styling enhancements.
• #2347: Addresses button alignment issues and introduces new styles in index.less, potentially relevant to icon alignment and sizing changes.

Suggested labels

bug

Suggested reviewers

• zzcr

Poem

In the garden where buttons bloom,
Icons dance, dispelling gloom.
Sizes shift with a gentle sway,
A perfect fit for every play.
With colors bright and styles anew,
Our buttons shine, just for you! 🌼✨

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