test: Add comprehensive tests for QuestionEngine

[google-labs-jules]

Added a new test file src/components/game/tests/QuestionEngine.test.tsx to increase test coverage for the QuestionEngine component. Covered rendering, interaction, hints, scoring, and boss battle logic. QuestionEngine coverage increased to ~89%.

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PR created automatically by Jules for task 9196096167844248467 started by @albertoivo

[google-labs-jules]

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[albertoivo]

2026-01-25T03:23:26.4268641Z ##[error]src/components/game/tests/QuestionEngine.test.tsx(1,37): error TS6133: 'waitFor' is declared but its value is never read.
2026-01-25T03:23:26.4280316Z ##[error]src/components/game/tests/QuestionEngine.test.tsx(2,48): error TS1484: 'Mock' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.
2026-01-25T03:23:26.4289021Z ##[error]src/components/game/tests/QuestionEngine.test.tsx(9,10): error TS1484: 'QuestionDocument' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.
2026-01-25T03:23:26.7354631Z ##[error]Process completed with exit code 2.

[google-labs-jules]

2026-01-25T03:23:26.4268641Z ##[error]src/components/game/tests/QuestionEngine.test.tsx(1,37): error TS6133: 'waitFor' is declared but its value is never read.
2026-01-25T03:23:26.4280316Z ##[error]src/components/game/tests/QuestionEngine.test.tsx(2,48): error TS1484: 'Mock' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.
2026-01-25T03:23:26.4289021Z ##[error]src/components/game/tests/QuestionEngine.test.tsx(9,10): error TS1484: 'QuestionDocument' is a type and must be imported using a type-only import when 'verbatimModuleSyntax' is enabled.
2026-01-25T03:23:26.7354631Z ##[error]Process completed with exit code 2.

Fixed: Removed unused waitFor and updated imports to use type-only imports for Mock and QuestionDocument.

[github-actions]

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