doc(LoginTemplate): use ValidateForm in login form

[ArgoZhang]

Link issues

fixes #6450

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

Use ValidateForm for form validation and submission in all login templates to improve consistency and address issue #6450

Enhancements:

• Wrap login inputs in ValidateForm and bind OnValidSubmit handlers in all sample templates
• Convert login buttons to submit types and implement corresponding OnSubmit/OnEmailSubmit/OnPasswordSubmit callbacks
• Introduce a unified LoginModel in Template5 to manage email and password fields and replace individual variables

[sourcery-ai]

Reviewer's Guide

This PR refactors the login samples to adopt the ValidateForm component uniformly, replacing ad-hoc input validation and click handlers with form-level validation callbacks and model binding.

Class diagram for updated login form model usage

classDiagram
    class LoginModel {
        string? Email
        string? Password
    }
    class Template1
    class Template2
    class Template3
    class Template4
    class Template5
    Template1 --> LoginModel : uses
    Template2 --> LoginModel : uses
    Template3 --> LoginModel : uses
    Template4 --> LoginModel : uses
    Template5 --> LoginModel : uses
    class ValidateForm {
        +Model
        +OnValidSubmit(EditContext)
    }
    Template1 --> ValidateForm : uses
    Template2 --> ValidateForm : uses
    Template3 --> ValidateForm : uses
    Template4 --> ValidateForm : uses
    Template5 --> ValidateForm : uses

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File-Level Changes

Change	Details	Files
Refactor Template5 to use form validation with a shared model	Wrap email and password steps in ValidateForm with OnValidSubmit handlers Introduce LoginModel for Email/Password and remove separate string fields Convert OnEmailSubmit/OnPasswordSubmit to Task handlers that accept EditContext Update Buttons to Submit type and bind inputs to LoginModel	Template5.razor
Standardize ValidateForm usage in Templates 1–4	Add OnValidSubmit="OnSubmit" to all ValidateForm instances Change primary Buttons to ButtonType.Submit Implement OnSubmit(EditContext) methods calling StateHasChanged Minor input tweaks (IsAutoFocus, placeholder adjustments)	Template1.razor Template2.razor Template3.razor Template4.razor

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#6450	Update the LoginTemplate (login form) to use the ValidateForm component.	✅

Possibly linked issues

• doc(LoginTemplate): use ValidateForm in login form #6450: PR updates login templates to incorporate ValidateForm components, directly addressing the issue's requirements.

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[sourcery-ai]

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

• Template5’s final “进入” button no longer has an event handler—add an OnClick or wrap it in a ValidateForm with OnValidSubmit to invoke your submit logic.
• Since you’re using ValidateForm, decorate LoginModel properties with DataAnnotations (e.g. [Required], [EmailAddress]) and remove SkipValidate so you can rely on built-in validation instead of manual flags.
• The OnSubmit handlers in Templates1–4 all just call StateHasChanged; consider extracting this repetitive logic into a shared base component or helper method to DRY up the code.

Prompt for AI Agents

Please address the comments from this code review:
## Overall Comments
- Template5’s final “进入” button no longer has an event handler—add an OnClick or wrap it in a ValidateForm with OnValidSubmit to invoke your submit logic.
- Since you’re using ValidateForm, decorate LoginModel properties with DataAnnotations (e.g. [Required], [EmailAddress]) and remove SkipValidate so you can rely on built-in validation instead of manual flags.
- The OnSubmit handlers in Templates1–4 all just call StateHasChanged; consider extracting this repetitive logic into a shared base component or helper method to DRY up the code.

---

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (a324fe4) to head (7e436a4).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #6451   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          749       749           
  Lines        32359     32359           
  Branches      4571      4571           
=========================================
  Hits         32359     32359           

Flag	Coverage Δ
BB	100.00% <ø> (?)

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