perf(ui/bottom-navigation): handle active boundary

[zhenyuWang]

No description provided.

[github-actions]

[codecov-commenter]

Codecov Report

Merging #411 (f571038) into dev (6cb05e0) will decrease coverage by 0.12%.
The diff coverage is 68.18%.

@@            Coverage Diff             @@
##              dev     #411      +/-   ##
==========================================
- Coverage   96.52%   96.40%   -0.13%     
==========================================
  Files         217      217              
  Lines        5128     5147      +19     
  Branches      976      980       +4     
==========================================
+ Hits         4950     4962      +12     
- Misses        174      179       +5     
- Partials        4        6       +2     

Impacted Files	Coverage Δ
...rlet-ui/src/bottom-navigation/BottomNavigation.vue	90.90% <66.66%> (-7.65%)	⬇️
packages/varlet-ui/src/tabs/Tabs.vue	84.81% <100.00%> (ø)

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