wangdl c7de97279b test: add P1-fallback + refresh tests for StudyHomeViewModel
- P1 fallback: continueService throws → falls to unfinished session
- refresh: updates stats without setting loadingState
- Fix: remove nonexistent materialId/readingTargetType from LearningSession mock

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-06-18 13:25:41 +08:00
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