fix(Select): add composition support

[ArgoZhang]

add composition support

Summary of the changes (Less than 80 chars)

简单描述你更改了什么, 不超过80个字符；如果有关联 Issue 请在下方填写相关编号

Description

fixes #4826

Regression?

• Yes
• No

[If yes, specify the version the behavior has regressed from]

[是否影响老版本]

Risk

• High
• Medium
• Low

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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

Add composition event support to the Select component to fix issue #4826 and improve search input handling with debounce functionality.

Bug Fixes:

• Fix the issue with the Select component by adding support for composition events, addressing the problem described in issue bug(Select): 选择器输入时，需增加防抖 #4826.

Enhancements:

• Enhance the Select component by integrating debounce functionality for search input handling.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR adds composition support to the Select component by implementing IME input handling and reorganizing the search functionality. The changes include debouncing search input, handling composition events, and restructuring the component's initialization and event handling.

Sequence diagram for Select component initialization

sequenceDiagram
    participant User
    participant SelectComponent
    participant JSInterop
    participant EventHandler

    User->>SelectComponent: Initialize Select
    SelectComponent->>JSInterop: Invoke init with options
    JSInterop->>EventHandler: Set up event listeners
    EventHandler->>SelectComponent: Handle input and composition events

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Updated class diagram for Select component

classDiagram
    class SelectComponent {
        +Task InvokeInitAsync()
        +Task ConfirmSelectedItem(int index)
        +Task TriggerOnSearch(string searchText)
        -Task SearchTextChanged(string val)
        -ValueTask<ItemsProviderResult<SelectedItem>> LoadItems(ItemsProviderRequest request)
    }

    note for SelectComponent "Added TriggerOnSearch method for handling search input from JS"
    note for SelectComponent "Modified InvokeInitAsync to pass options object with callbacks"

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File-Level Changes

Change	Details	Files
Implemented IME input handling for better international text input support	Added composition event handlers to track IME input state Added debouncing to search input handling Prevented search triggering during active composition	src/BootstrapBlazor/Components/Select/Select.razor.js
Restructured component initialization and event handling	Replaced single method parameter with options object for initialization Added new JSInvokable method for search handling Updated event cleanup in dispose method	src/BootstrapBlazor/Components/Select/Select.razor.js src/BootstrapBlazor/Components/Select/Select.razor.cs
Simplified search input template structure	Moved search input outside of conditional blocks Removed duplicate search input markup Removed direct binding in favor of JS-based event handling	src/BootstrapBlazor/Components/Select/Select.razor

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#4826	Add debounce handling for Chinese character input in the Select component	✅

Possibly linked issues

• bug(Select): 选择器输入时，需增加防抖 #4826: The PR addresses the Select component's issue by adding composition support, potentially fixing the selection problem.

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[sourcery-ai]

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

Overall Comments:

• Consider adding documentation explaining what composition support means and why it's needed for IME input in the PR description

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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