SelectTree有ShowSearch参数，漏掉OnSearchAsync参数补齐

[Tony-ST0754]

SelectTree有ShowSearch参数，漏掉OnSearchAsync参数

Link issues

fixes #7843

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

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 asynchronous search callback support to SelectTree when search is enabled.

New Features:

• Expose an OnSearchAsync callback parameter on SelectTree to handle asynchronous search operations when ShowSearch is enabled.

Enhancements:

• Wire the SelectTree OnSearchAsync parameter through to the internal TreeView component to enable custom search behavior.

[bb-auto]

Thanks for your PR, @Tony-ST0754. Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds an async search callback parameter to SelectTree and wires it through to the underlying TreeView when search is enabled.

Sequence diagram for SelectTree search with OnSearchAsync

sequenceDiagram
    actor User
    participant SelectTree_TValue_ as SelectTree~TValue~
    participant TreeView_TValue_ as TreeView~TValue~
    participant OnSearchAsyncHandler as OnSearchAsync_handler

    User->>SelectTree_TValue_: type_search_text(query)
    SelectTree_TValue_->>TreeView_TValue_: render_with(ShowSearch=true, OnSearchAsync)
    User->>TreeView_TValue_: input_search_text(query)
    TreeView_TValue_->>OnSearchAsyncHandler: OnSearchAsync(query)
    OnSearchAsyncHandler-->>TreeView_TValue_: List<TreeViewItem<TValue>> results
    TreeView_TValue_->>User: display_filtered_tree(results)

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Class diagram for updated SelectTree OnSearchAsync parameter

classDiagram
    class SelectTree~TValue~ {
        +bool ShowSearch
        +Func~string?, Task~List~TreeViewItem~TValue~~?~~~ OnSearchAsync
    }

    class TreeView~TValue~ {
        +IEnumerable~TreeViewItem~TValue~~ Items
        +bool ShowIcon
        +bool ShowSearch
        +bool ShowResetSearchButton
        +bool CanExpandWhenDisabled
        +string CustomKeyAttribute
        +Func~string?, Task~List~TreeViewItem~TValue~~?~~~ OnSearchAsync
        +Task OnTreeItemClick(TValue value)
        +Task OnExpandNodeAsync(TreeViewItem~TValue~ node)
    }

    class TreeViewItem~TValue~ {
        +TValue Value
        +string Text
        +bool IsExpanded
        +bool IsDisabled
    }

    SelectTree~TValue~ --> TreeView~TValue~ : passes_OnSearchAsync
    TreeView~TValue~ --> TreeViewItem~TValue~ : uses

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File-Level Changes

Change	Details	Files
Expose async search callback on SelectTree and forward it to TreeView when ShowSearch is enabled.	Add OnSearchAsync component parameter with XML documentation to SelectTree backing class. Wire OnSearchAsync through from SelectTree to the nested TreeView component in the .razor markup so searches are handled by the provided callback. Add missing using directive for System.Timers, potentially required by related functionality.	src/BootstrapBlazor/Components/Select/SelectTree.razor.cs src/BootstrapBlazor/Components/Select/SelectTree.razor

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#7843	Expose an OnSearchAsync parameter on the SelectTree component so that consumers can provide a search callback.	✅
#7843	Connect the SelectTree.OnSearchAsync parameter to the underlying TreeView so that when ShowSearch is true, the search functionality can be fully executed via the callback.	✅

Possibly linked issues

• feat(SelectTree): SelectTree有ShowSearch参数，漏掉OnSearchAsync参数 #7843: PR implements the issue request by adding and wiring OnSearchAsync to SelectTree when ShowSearch is enabled.

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[sourcery-ai]

Hey - I've left some high level feedback:

• The newly added using System.Timers; in SelectTree.razor.cs is not used anywhere in this file and should be removed to avoid unnecessary dependencies.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- The newly added `using System.Timers;` in `SelectTree.razor.cs` is not used anywhere in this file and should be removed to avoid unnecessary dependencies.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (bcf0717) to head (12b94ee).

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #7844   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          764       764           
  Lines        34165     34166    +1     
  Branches      4704      4704           
=========================================
+ Hits         34165     34166    +1     

Flag	Coverage Δ
BB	100.00% <100.00%> (?)

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