docs(ContextMenu): add TreeView sample code

[kimdiego2098]

add TreeView sample code

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 #5123

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 conditional rendering to the context menu based on the selected item.

New Features:

• Added a new "CopySub" context menu item.

Documentation:

• Updated the context menu documentation.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request adds documentation for the right-click context menu component. It also modifies the context menu logic to conditionally render menu items based on the selected tree node.

Sequence diagram for context menu interaction flow

sequenceDiagram
    actor User
    participant TreeView
    participant ContextMenu
    participant CallbackLogger

    User->>TreeView: Right clicks on tree node
    TreeView->>ContextMenu: Triggers OnBeforeShowCallback
    ContextMenu->>CallbackLogger: Logs selected node text
    Note over ContextMenu: Stores selected model
    alt SelectModel.Id == '1020'
        ContextMenu-->>User: Show Copy and Paste options
    else
        ContextMenu-->>User: Show CopySub option
    end

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Class diagram for ContextMenu component structure

classDiagram
    class ContextMenuZone {
    }
    class ContextMenu {
        +OnBeforeShowCallback: Task
    }
    class ContextMenuItem {
        +Icon: string
        +Text: string
        +OnClick: Task
    }
    class TreeFoo {
        +Id: string
        +Text: string
    }
    ContextMenuZone --> ContextMenu
    ContextMenu --> ContextMenuItem
    note for ContextMenu "Modified to conditionally render
menuitems based on TreeFoo selection"

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File-Level Changes

Change	Details	Files
Added conditional rendering of context menu items	Context menu items "Copy" and "Paste" are now only shown when the selected tree node has ID "1020" A new context menu item "CopySub" is shown for other tree nodes	src/BootstrapBlazor.Server/Components/Samples/ContextMenus.razor
Added OnBeforeShowCallback logic	Added a SelectModel property to store the currently selected tree node The OnBeforeShowCallback method now updates the SelectModel property based on the selected tree node	src/BootstrapBlazor.Server/Components/Samples/ContextMenus.razor.cs
Added new copy handler	Added an OnCopySub method to handle clicks on the new "CopySub" context menu item	src/BootstrapBlazor.Server/Components/Samples/ContextMenus.razor.cs
Updated localization files	Updated the localization files to include the new "CopySub" text	src/BootstrapBlazor.Server/Locales/en-US.json src/BootstrapBlazor.Server/Locales/zh-CN.json

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[bb-auto]

Thanks for your PR, @kimdiego2098. Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[sourcery-ai]

Hey @kimdiego2098 - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider making the menu item visibility logic more flexible instead of hardcoding ID '1020'. This could be done through configuration or by checking node properties/types.

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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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (d17ea0d) to head (134c695).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #5118   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          634       634           
  Lines        28174     28174           
  Branches      4041      4041           
=========================================
  Hits         28174     28174           

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