SWA deployment fixes

[xenobiasoft]

Description

Fixes some deployment issues with the SWA. Bumps up the SWA tier.

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Code refactoring
• Performance improvement
• Other (please describe):

Changes Made

• Adds a staticwebapp.config.json file
• Fixes SWA app name
• Bumps up SWA tier from Free to Standard

Testing

• I have tested these changes locally
• All existing tests pass
• I have added new tests (if applicable)

Screenshots (if applicable)

Checklist

• My code follows the project's coding standards
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings
• I have updated the documentation (if necessary)

[Copilot]

Pull request overview

This PR aims to resolve Azure Static Web Apps (SWA) deployment/runtime issues by adding SWA routing configuration, correcting deployment naming, and moving the SWA resource to the Standard tier.

Changes:

• Added staticwebapp.config.json to support SPA navigation fallback behavior in the React frontend.
• Updated the GitHub Actions workflow to correct the target Web App name and pass VITE_API_BASE_URL during the React build.
• Changed the SWA Bicep module SKU from Free to Standard and included the module in the solution.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
src/frontend/Sudoku.React/public/staticwebapp.config.json	Introduces SWA navigation fallback + MIME type config for the React SPA.
infra/modules/staticwebapp.bicep	Updates SWA SKU to Standard tier.
Sudoku.sln	Adds the SWA Bicep module into the solution’s infra modules list.
.github/workflows/main.yml	Fixes Web App name casing, injects VITE_API_BASE_URL for frontend build, and tightens deploy job conditions.

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