v0.3.8

v0.3.8 — Discord Bug Batch

Fix Gemini model names: gemini-3.1-pro-preview, gemini-3-flash-preview, gemini-3.1-flash-lite-preview (removed gemini-3-deep-think)
Fix Grok model names: grok-4-0709, grok-4-1-fast-reasoning, grok-4-1-fast-non-reasoning, grok-4-fast-reasoning, grok-4-fast-non-reasoning
Fix Gemini empty response returning silent failure instead of error
Fix /model command now shows provider name after switch
Fix model routing updating provider when routed to a different provider's model
Fix hand reactivation failing with "Agent already exists"
Fix fresh install first chat failing (auto-spawns default assistant)