[C.4.4] Write unit tests for english-to-asl.ts

[hello-caleb]

Description

Test the English → ASL grammar conversion without needing ASL knowledge.

Acceptance Criteria

• Test article removal ("the", "a", "an")
• Test time-word reordering
• Test question marker addition
• Test negation handling
• Test unknown word → fingerspelling fallback

Why This Works Without Knowing ASL

We test that our RULES are applied correctly, not that the output is correct ASL.

Dependencies

C.3.1

Output

src/lib/__tests__/english-to-asl.test.ts

Estimate

4 hours