jack/PPT @ 887a4c1cda2d380f89234cfd8e43487875f56a7d

jimmylee 530cd82f0d docs: clarify task hint session cache		преди 2 месеца
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2026-04-25-english-speaking-dialogue-prompt-design.md	d2b22fbc40 docs(speaking): add design spec and implementation plan for grade-aware system prompt	преди 2 месеца
2026-04-25-english-speaking-task-hint-modal-design.md	530cd82f0d docs: clarify task hint session cache	преди 2 месеца