fix(search): preserve whitespace for English locale search filtering

[GongHeng2017]

Previously all whitespace was removed from search text regardless of locale, breaking multi-word searches in English. Extract the filtering logic into a shared helper and only strip whitespace for non-English locales.

Log: 修复英文环境下搜索多词内容时空格被过滤导致搜索失败的问题
PMS: BUG-373531
Influence: 英文环境下多词搜索结果正常返回，非英文环境行为不变

Summary by Sourcery

Preserve whitespace in English search input while maintaining locale-specific filtering for other languages.

Bug Fixes:

• Preserve spaces in English locale search queries so multi-word searches return the expected results while retaining existing non-English behavior.

Enhancements:

• Centralize search text filtering and apply consistent locale-aware processing across keyword searches, live search, and title-bar completion.

[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: GongHeng2017, lzwind

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Details

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• debian/deepin/OWNERS

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[GongHeng2017]

/forcemerge

[sourcery-ai]

Reviewer's Guide

Search text filtering is now shared across all search entry points and preserves whitespace for English locales, allowing multi-word searches while retaining the previous whitespace-stripping behavior elsewhere.

Sequence diagram for locale-aware search filtering

sequenceDiagram
    participant User
    participant WebWindow
    participant SearchManager

    User->>WebWindow: onSearchContentByKeyword(keyword)
    WebWindow->>WebWindow: filterSearchText(keyword)
    alt English locale
        WebWindow->>SearchManager: searchContent(searchKey with spaces)
    else Non-English locale
        WebWindow->>SearchManager: searchContent(searchKey without whitespace)
    end

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File-Level Changes

Change	Details	Files
Centralize search-input normalization and make whitespace handling locale-dependent.	Added a shared helper that removes line breaks for all locales and other whitespace only for non-English locales. Detected English system locales using QLocale. Replaced duplicated filtering logic in keyword search, delayed search updates, and title-bar completion handling.	src/view/web_window.cpp

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[deepin-bot]

This pr force merged! (status: unstable)