feat(Drawer): auto focus when drawer shown

[ArgoZhang]

auto focus when drawer shown

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 #5208

Regression?

• Yes
• No

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

[是否影响老版本]

Risk

• High
• Medium
• Low

[Justify the selection above]

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

Bug Fixes:

• Fix: Drawer does not focus when opened.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request implements auto focus when the drawer is shown. It also refactors the drawer open/close logic to be more concise.

Sequence diagram for drawer show/hide behavior

sequenceDiagram
    participant U as User
    participant D as Drawer
    participant A as Animation Frame

    U->>D: Open drawer
    D->>D: Add overflow-hidden to body
    D->>A: Request animation frame
    A-->>D: Animation frame callback
    D->>D: Add show class
    D->>D: Set focus

    U->>D: Close drawer
    D->>D: Remove show class
    D->>A: Request animation frame
    A-->>D: Animation frame callback
    D->>D: Remove overflow-hidden from body

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State diagram for drawer component

stateDiagram-v2
    [*] --> Closed
    Closed --> Opening: User opens drawer
    Opening --> Open: Animation complete
    Open --> Closing: User closes drawer
    Closing --> Closed: Animation complete

    state Open {
        [*] --> Focused: Auto focus
    }

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File-Level Changes

Change	Details	Files
Added auto focus to the drawer when it is shown.	Added el.focus() to the show function to focus on the drawer when it is opened.	src/BootstrapBlazor/Components/Drawer/Drawer.razor.js
Refactored the drawer open/close logic.	Removed the conditional check for el.classList.contains('show') when closing the drawer. Simplified the logic for hiding the drawer.	src/BootstrapBlazor/Components/Drawer/Drawer.razor.js

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#5208	Support auto focus when IsKeyboard is set to true	✅

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[sourcery-ai]

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

Overall Comments:

• Please complete the PR template in English and check the appropriate boxes for verification, risk assessment, and other checks. This helps maintainers better understand and review the changes.
• Consider documenting the accessibility implications of auto-focusing the drawer when shown, and whether this behavior should be configurable.

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 (692d46c) to head (0ec37e7).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #5211   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          634       634           
  Lines        28194     28198    +4     
  Branches      4057      4058    +1     
=========================================
+ Hits         28194     28198    +4     

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