refactor(mocks): type handler responses against API types

[Amund211]

Summary

Every JSON-returning MSW handler now assigns its payload to a typed const response: API... = ... before HttpResponse.json(response), so the mocks fail to compile if they drift from the expected flashlight API response shapes.

• account endpoints — added exported APIUsernameResponse (/v1/account/uuid/:uuid) and APIUUIDResponse (/v1/account/username/:username) discriminated unions covering both the success and 404 payloads.
• wrapped endpoint — exported the existing APIWrappedData interface and used it to type makeWrappedResponse(...)'s output.
• history / sessions endpoints — already typed their arrays (APIPlayerDataPIT[] / APISession[]); renamed the locals to response for a uniform pattern.
• The mineatar handler returns an arrayBuffer, not JSON, so it is unchanged.

This is behavior-preserving: the returned objects are identical, only the type annotations are new.

Testing

• pnpm tsc ✅
• pnpm lint:check (oxlint + oxfmt) ✅
• pnpm test:unit — 797 passed ✅
• pnpm test:ui — 201 passed ✅ (browser tests exercise these MSW handlers)

🤖 Generated with Claude Code

[Copilot]

Pull request overview

This pull request refactors MSW mock handlers to type-check their JSON payloads against the corresponding Flashlight API response types, ensuring mocks fail compilation if they drift from the expected API shapes.

Changes:

• Exported and introduced API response types (APIUsernameResponse, APIUUIDResponse, APIWrappedData) for use by mocks.
• Updated MSW handlers to assign typed const response = ... values before returning HttpResponse.json(response).
• Standardized local variable naming in handlers (e.g., history/sessions → response) for consistency.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/queries/wrapped.ts	Exports APIWrappedData so MSW mocks can type-check wrapped endpoint responses.
src/queries/uuid.ts	Adds exported APIUUIDResponse union type for /v1/account/username/:username responses.
src/queries/username.ts	Adds exported APIUsernameResponse union type for /v1/account/uuid/:uuid responses.
src/mocks/handlers.ts	Types JSON payloads returned by MSW handlers against the exported API response types.

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