Revert "feat: Add fuzzy search support for applications"

[wjyrich]

This reverts commit 8e2bca7.

Summary by Sourcery

Revert fuzzy search support and simplify search filter logic to use direct substring matching across multiple name representations.

Enhancements:

• Simplify filterAcceptsRow to use direct substring checks on displayName, normalized name, transliterated text, and initial letters.
• Add jianpin matching via Dtk::Core::firstLetters.

Chores:

• Remove fuzzyMatch method and fuzzy threshold configuration.

[deepin-ci-robot]

deepin pr auto review

关键摘要:

• 删除了fuzzyMatch函数，改用contains方法进行模糊匹配，简化了代码逻辑。
• 新增了jianpin变量，用于存储简拼，但未提供Dtk::Core::firstLetters函数的实现细节，可能需要确认其正确性和性能影响。
• nameCopy变量用于处理name字符串，但直接使用name的副本可能会导致不必要的内存分配，建议使用QString的toLower()和replace()方法直接修改原字符串。

是否建议立即修改:

• 是，需要确认Dtk::Core::firstLetters函数的实现和性能，并考虑优化nameCopy的处理方式。

[sourcery-ai]

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

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[sourcery-ai]

suggestion (bug_risk): Using join(',') inserts commas between initials and may break substring matching

Use join("") instead of join(",") to concatenate initials without commas so contains() works as expected.

Suggested change

	const QString & jianpin = Dtk::Core::firstLetters(displayName).join(',');
	// concatenate initials without commas so contains() works correctly
	const QString jianpin = Dtk::Core::firstLetters(displayName).join(QString());

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: BLumia, wjyrich

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• debian/deepin/OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[sourcery-ai]

Reviewer's Guide

This PR reverts the previously added fuzzy search feature by removing the fuzzyMatch implementation and simplifying the row filtering logic to use basic substring checks and jianpin matching.

File-Level Changes

Change	Details	Files
Remove fuzzy search implementation	Deleted the fuzzyMatch method’s definition and logic Removed the m_fuzzyThreshold member variable declaration	src/models/searchfilterproxymodel.cpp src/models/searchfilterproxymodel.h
Simplify filterAcceptsRow to use basic contains and jianpin	Replaced searchPattern normalization and fuzzyMatch calls with nameCopy.toLower().replace Added jianpin extraction via Dtk::Core::firstLetters for matching Updated return condition to use .contains on displayName, nameCopy, transliterated, and jianpin	src/models/searchfilterproxymodel.cpp

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