fix(Camera): add last device id support switch device

[kkxkx]

Link issues

fixes #8263
fixes #8264

Is there an existing issue for this?

I have searched the existing issues
Describe the bug
Camera Devices Added lastUsedDeviceId property to camera object for tracking the last used video device.
Camera组件添加最终使用的设备ID属性，解决因UI刷新导致的视频流画面闪烁问题。

Expected Behavior
Camera Devices Added lastUsedDeviceId property to camera object for tracking the last used video device.
Camera组件添加最终使用的设备ID属性，解决因UI刷新导致的视频流画面闪烁问题。

Interactive render mode
Interactive Server (Interactive server-side rendering (interactive SSR) using Blazor Server)

Steps To Reproduce
none

Exceptions (if any)
No response

.NET Version
NET10.0

Anything else?
No response

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Adds tracking of the last used video device in the camera component and skips unnecessary device reinitialization when the same device is selected.

Sequence diagram for camera update flow with lastUsedDeviceId tracking

sequenceDiagram
    actor User
    participant CameraComponent as CameraElement
    participant CameraJs as CameraModule
    participant MediaDevices

    User->>CameraComponent: change data-device-id
    CameraComponent->>CameraJs: update(id)
    CameraJs->>CameraJs: [read data-device-id]
    CameraJs->>CameraJs: [camera.lastUsedDeviceId === deviceId]
    alt same deviceId
        CameraJs->>CameraJs: return
    else different deviceId
        CameraJs->>CameraJs: stopDevice(camera)
        CameraJs->>CameraJs: openDevice(camera)
        CameraJs->>MediaDevices: navigator.mediaDevices.getUserMedia(option)
        MediaDevices-->>CameraJs: stream
        CameraJs->>CameraJs: play(camera, option)
        CameraJs->>CameraJs: camera.lastUsedDeviceId = option.video.deviceId
    end

Loading

File-Level Changes

Change	Details	Files
Track and store the last used video device ID on the camera object.	Initialize a lastUsedDeviceId property on the camera object when it is created. Set lastUsedDeviceId when a new video stream is opened, handling both exact and non-exact deviceId formats.	src/BootstrapBlazor/Components/Camera/Camera.razor.js
Avoid reopening the camera when the selected device matches the last used device.	Read the currently selected deviceId from the camera element attribute on update. Early-return from update when the selected deviceId equals lastUsedDeviceId to prevent redundant stop/open operations.	src/BootstrapBlazor/Components/Camera/Camera.razor.js

Possibly linked issues

• #unknown: PR stores exact deviceId and prevents unnecessary switching, directly addressing the camera exact device-id bug.

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[sourcery-ai]

Hey - I've left some high level feedback:

• In play, accessing option.video.deviceId.exact assumes option.video and option.video.deviceId are always present and either a constraint object or string; consider guarding or normalizing this value to avoid runtime errors when play is called without an explicit device.
• The type of lastUsedDeviceId may differ from the data-device-id attribute (e.g., constraint object vs. string), so it would be safer to normalize both before comparing in update to ensure the equality check behaves as intended.
• The early return if (camera.lastUsedDeviceId === deviceId) return; in update can block switching when camera.video.deviceId has changed; consider basing the decision solely on camera.video.deviceId or ensuring lastUsedDeviceId is always kept in sync with the active track.

Prompt for AI Agents

Please address the comments from this code review:

## Overall Comments
- In `play`, accessing `option.video.deviceId.exact` assumes `option.video` and `option.video.deviceId` are always present and either a constraint object or string; consider guarding or normalizing this value to avoid runtime errors when `play` is called without an explicit device.
- The type of `lastUsedDeviceId` may differ from the `data-device-id` attribute (e.g., constraint object vs. string), so it would be safer to normalize both before comparing in `update` to ensure the equality check behaves as intended.
- The early return `if (camera.lastUsedDeviceId === deviceId) return;` in `update` can block switching when `camera.video.deviceId` has changed; consider basing the decision solely on `camera.video.deviceId` or ensuring `lastUsedDeviceId` is always kept in sync with the active track.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (b30c523) to head (b3e1636).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #8262   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          769       769           
  Lines        34436     34436           
=========================================
  Hits         34436     34436           

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BB	100.00% <ø> (?)

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