refactor(IntersectionObserver): add margin bottom stype

[ArgoZhang]

Link issues

fixes #6441

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

Verification

• Manual (required)
• Automated

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

Bug Fixes:

• Add margin-bottom to the IntersectionObserver LoadMore component to resolve spacing issue

[sourcery-ai]

Reviewer's Guide

Refactors the IntersectionObserver LoadMore component by correcting a CSS syntax error and introducing a bottom margin for proper spacing.

Class diagram for LoadMore component style changes

classDiagram
    class LoadMore {
        +padding: var(--bb-intersection-observer-loading-padding)
        +margin-bottom: 1px
    }

Loading

File-Level Changes

Change	Details	Files
Enhance LoadMore loading indicator styling	Add missing semicolon after padding declaration Introduce 1px bottom margin to loading state	src/BootstrapBlazor/Components/IntersectionObserver/LoadMore.razor.scss

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#6441	Add a margin-bottom style to the IntersectionObserver component.	✅

Possibly linked issues

• feat(IntersectionObserver): add margin bottom stype #6441: PR adds margin-bottom style, directly addressing the issue's request.

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[sourcery-ai]

Hey @ArgoZhang - I've reviewed your changes - here's some feedback:

• The SCSS change hardcodes margin-bottom: 1px; consider exposing this via a CSS variable for greater customization.
• The PR title has a typo (‘stype’ should be ‘style’); please correct it before merging.

Prompt for AI Agents

Please address the comments from this code review:
## Overall Comments
- The SCSS change hardcodes margin-bottom: 1px; consider exposing this via a CSS variable for greater customization.
- The PR title has a typo (‘stype’ should be ‘style’); please correct it before merging.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (c8bc51a) to head (f536168).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #6442   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          748       748           
  Lines        32259     32259           
  Branches      4560      4560           
=========================================
  Hits         32259     32259           

Flag	Coverage Δ
BB	100.00% <ø> (?)

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