Refactor/clean up game application service

[xenobiasoft]

Description

Cleans up CosmosDb configuration and refactored game controller code.

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

• Simplified CosmosClient configuration
• Refactored game controllers to remove IGameService dependency and changed endpoints to send commands and queries.
• Added explicit endpoints for game actions

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)

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[Copilot]

Pull request overview

Refactors the Sudoku game API/controller layer to use MediatR commands/queries directly (removing the IGameApplicationService abstraction), introduces explicit game status/action endpoints, and adjusts clients/tests/configuration around Cosmos DB and App Configuration.

Changes:

• Replace IGameApplicationService usage with direct IMediator.Send(...) in API controllers; remove the application service layer.
• Introduce explicit game status/action endpoints (pause/resume/abandon/complete, actions controller), updating React/Blazor clients and tests.
• Simplify Cosmos DB/App Configuration setup (incl. optional App Configuration enablement and container auto-create options).

Reviewed changes

Copilot reviewed 44 out of 44 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
src/frontend/Sudoku.React/src/pages/GamePage.tsx	Switches status updates to pauseGame/resumeGame calls.
src/frontend/Sudoku.React/src/pages/GamePage.test.tsx	Updates mocks/assertions for pause/resume status calls.
src/frontend/Sudoku.React/src/pages/GamePage.integration.test.tsx	Updates integration mocks for pause/resume status calls.
src/frontend/Sudoku.React/src/hooks/useGameService.ts	Replaces generic status update with pauseGame/resumeGame helpers.
src/frontend/Sudoku.React/src/api/apiClient.ts	Adds pauseGame/resumeGame endpoints (POST).
src/frontend/Sudoku.React/src/api/apiClient.test.ts	Adds/updates tests for pause/resume API calls.
src/frontend/Sudoku.Blazor/appsettings.json	Moves appconfig endpoint settings into base config.
src/frontend/Sudoku.Blazor/appsettings.Development.json	Removes dev-specific appconfig block.
src/frontend/Sudoku.Blazor/Services/HttpClients/IGameApiClient.cs	Replaces SaveGameStatusAsync with explicit status action methods.
src/frontend/Sudoku.Blazor/Services/HttpClients/GameApiClient.cs	Implements explicit status actions via POST; create-game now follows Location to fetch full game.
src/frontend/Sudoku.Blazor/Services/GameStateManager.cs	Maps local GameStatus values to explicit status action calls.
src/frontend/Sudoku.Blazor/Program.cs	Only requires Key Vault outside Development.
src/backend/Tests/Mocks/MockGameApiClientExtensions.cs	Updates verification to match explicit status action methods.
src/backend/Tests/Application/Services/GameApplicationServiceTests.cs	Removes tests for deleted GameApplicationService.
src/backend/Tests/Application/Handlers/CreateGameCommandHandlerTests.cs	Updates handler abstraction and asserts returned game id.
src/backend/Tests/API/PossibleValuesControllerTests.cs	Switches controller tests to Mediator commands/queries.
src/backend/Tests/API/GamesControllerTests.cs	Updates tests for Mediator usage and create-game response semantics.
src/backend/Tests/API/GameStatusControllerTests.cs	Expands tests for explicit status endpoints using Mediator.
src/backend/Tests/API/GameActionsControllerTests.cs	Updates tests to send MediatR commands.
src/backend/Tests/API/DependencyInjectionTests.cs	Updates DI expectations (Mediator instead of app service) and required services list.
src/backend/Tests/API/BaseGameControllerTests.cs	Base controller tests now mock IMediator.
src/backend/Sudoku.ServiceDefaults/AzureAppConfigurationExtensions.cs	Adds AzureAppConfiguration:Enabled flag to skip App Configuration bootstrap.
src/backend/Sudoku.Infrastructure/Services/CosmosDbService.cs	Adds optional auto-create for DB/container (with partition key path).
src/backend/Sudoku.Infrastructure/Repositories/CosmosDbUserProfileRepository.cs	Adds optional auto-create for profiles container.
src/backend/Sudoku.Infrastructure/Configuration/InfrastructureServiceCollectionExtensions.cs	Removes inline CosmosClient construction; relies on external registration.
src/backend/Sudoku.Infrastructure/Configuration/CosmosDbOptions.cs	Adds AutoCreateContainers and ContainerPartitionKeyPath options (defaults preserved).
src/backend/Sudoku.Application/Services/GameApplicationService.cs	Deletes application service layer.
src/backend/Sudoku.Application/Interfaces/IGameApplicationService.cs	Deletes application service interface.
src/backend/Sudoku.Application/Handlers/CreateGameCommandHandler.cs	Create-game now returns a Result<string> game id.
src/backend/Sudoku.Application/Configuration/ApplicationServiceCollectionExtensions.cs	Stops registering removed application service; keeps MediatR registration.
src/backend/Sudoku.Application/Commands/CreateGameCommand.cs	Updates command to ICommand<string>.
src/backend/Sudoku.AppHost/appsettings.json	Sets CosmosDb connection string in base config.
src/backend/Sudoku.AppHost/appsettings.Development.json	Removes duplicated connection string section.
src/backend/Sudoku.AppHost/Program.cs	Removes Key Vault reference wiring; keeps Cosmos emulator reference.
src/backend/Sudoku.Api/appsettings.json	Removes explicit CosmosDb DB/container name block (defaults apply).
src/backend/Sudoku.Api/appsettings.Development.json	Adjusts CosmosDb dev settings and enables auto-create.
src/backend/Sudoku.Api/Program.cs	Adds user secrets; gates Key Vault to non-Development; registers Cosmos client when enabled.
src/backend/Sudoku.Api/Controllers/PossibleValuesController.cs	Uses Mediator commands instead of app service.
src/backend/Sudoku.Api/Controllers/GamesController.cs	Uses Mediator; create-game now returns 201 with Location only.
src/backend/Sudoku.Api/Controllers/GameStatusController.cs	Replaces PATCH status with explicit POST endpoints (pause/resume/abandon/complete/validate).
src/backend/Sudoku.Api/Controllers/GameActionsController.cs	Uses Mediator for move/reset/undo commands.
src/backend/Sudoku.Api/Controllers/BaseGameController.cs	Base controller now depends on IMediator; HandleUnitResult uses Result.
scripts/set-app-config.sh	Updates App Config keys for CosmosDb auto-create/SSL validation options.
Tests/E2E/fixtures/api-mocks.ts	Updates E2E route mocking for status POST endpoints and validate response.

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