fix(Search): truncate long after text with ellipsis

[Vitalymt]

Problem

When the after prop in the Search component contains a long string (e.g. 'длинная отмена'), the text overflows the search field boundary instead of being truncated. This is specific to iOS platform where the after slot is rendered.

The .afterTextClip class uses text-overflow: clip which silently clips text without any visual indicator, and the .after container lacks overflow: hidden allowing the Button content to escape its bounds.

Steps to reproduce:

1. Set platform to iOS
2. Render <Search after="длинная отмена" />
3. Focus the search input
4. The text overflows outside the search field

Fix

• CSS: Change text-overflow: clip to text-overflow: ellipsis in .afterTextClip — consistent with every other truncation pattern in VKUI (RichCell, MiniInfoCell, FormItem, Header, Button, etc.)
• CSS: Add overflow: hidden to .after container to properly constrain the Button content within flex bounds
• E2E test: Add test case with long after text ('длинная отмена') to verify truncation behavior on iOS

Fixes #9795

[github-actions]

📊 Найдены изменения в собранных файлах: Отчет

Commit fdc5746

[github-actions]

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📦 Package ✅

yarn add @vkontakte/vkui@https://development.s3.prodcloud.vk.team/pull/9862/fdc57466d8d44a661304c7f8e492d803704be065/pkg/@vkontakte/vkui/_pkg.tgz

Commit fdc5746

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.22%. Comparing base (ba6f343) to head (fdc5746).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #9862   +/-   ##
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  Coverage   95.22%   95.22%           
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  Files         462      462           
  Lines       12512    12512           
  Branches     4478     4478           
=======================================
  Hits        11914    11914           
  Misses        598      598           

Flag	Coverage Δ
unittests	95.22% <ø> (ø)

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