fix(Fluent): restore btn-xs sizing overridden by theme .btn rule

[h2ls]

Link issues

fixes #1105

Summary By Copilot

Fluent 主题的 .btn 规则（--bs-btn-font-size / --bs-btn-line-height / --bs-btn-padding-y）与组件库 .btn-xs 同为单类选择器、优先级相同，但主题后加载，导致 TableCellButton（默认 btn-xs）的尺寸变量被覆盖成正常按钮大小。本 PR 在主题 .btn 规则之后补充 .btn-xs, .btn-group-xs > .btn 规则，恢复组件库默认值（$bs-btn-xs-* 与 Bootstrap 默认 line-height 1.5），同步更新 fluent.css 与 fluent.min.css。

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

仅新增一条 .btn-xs 变量恢复规则，不影响其他按钮尺寸。

Verification

• Manual (required)
• Automated

已在应用层 site.css 以相同规则验证：xs 按钮恢复小尺寸。

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Restore Fluent theme sizing variables for extra-small buttons overridden by the theme’s general button styles.

Bug Fixes:

• Restore extra-small button sizing in the Fluent theme so components such as TableCellButton retain their intended dimensions.

Chores:

• Update the Fluent theme assets to include the corrected extra-small button styles.

[bb-auto]

Thanks for your PR, @h2ls. Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds a Fluent theme rule to explicitly restore extra-small button (.btn-xs) sizing variables that were being overridden by the theme’s general .btn rule, ensuring TableCellButton and other xs buttons keep their intended compact size.

Flow diagram for Fluent extra-small button sizing override

flowchart TD
    A[TableCellButton uses btn-xs] --> B[Fluent theme loads general .btn rule]
    B --> C[Equal selector specificity causes xs sizing to be overridden]
    C --> D[Later .btn-xs and .btn-group-xs > .btn rule restores xs variables]
    D --> E[Compact extra-small button size]

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File-Level Changes

Change	Details	Files
Restore extra-small button (.btn-xs) sizing in the Fluent theme so it is not overridden by the generic .btn rule.	Add a post-.btn rule for .btn-xs and .btn-group-xs > .btn to reapply BootstrapBlazor xs padding, font size, and line-height variables Document in comments why the rule is needed, referencing TableCellButton, variable sources, and specificity/load-order behavior Synchronize the change into the minified fluent.min.css asset	src/components/BootstrapBlazor.Theme.Fluent/wwwroot/fluent.css src/components/BootstrapBlazor.Theme.Fluent/wwwroot/fluent.min.css

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#1105	Ensure Fluent theme styles do not override the BootstrapBlazor .btn-xs and .btn-group-xs > .btn sizing variables, so TableCellButton renders at the intended extra-small size.	✅
#1105	Apply the fix consistently to both the readable and minified Fluent theme CSS assets.	✅

Possibly linked issues

• fix(Fluent): 主题 .btn 规则覆盖组件库 .btn-xs 尺寸变量导致 TableCellButton 变大 #1105: PR新增.btn-xs恢复规则，修复TableCellButton在Fluent主题下尺寸变大的问题。

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[Copilot]

Pull request overview

Restores extra-small button sizing in the Fluent theme for components such as TableCellButton.

Changes:

• Adds .btn-xs and .btn-group-xs > .btn sizing overrides.
• Synchronizes formatted and minified Fluent stylesheets.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
src/components/BootstrapBlazor.Theme.Fluent/wwwroot/fluent.min.css	Adds the minified extra-small button override.
src/components/BootstrapBlazor.Theme.Fluent/wwwroot/fluent.css	Adds readable extra-small button variables.

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