优化: token分项显示(in/cache/out/reasoning)+ 详情面板 + base前置

token分项(各计费不同,不显 total):df-ai 解析 provider cache/reasoning(openai_compat prompt_cache_hit/miss/reasoning_tokens + anthropic cache_read/creation)+ TokenUsage 加字段(全构造点)+ AiMessage/AiCompleted/DB V39(ai_messages 加 cache_hit/miss/reasoning 列)+ message_repo 映射(持久化)+ 前端 MessageList 显 in·cache·out·reason(in=cache_miss 全价,reasoning 有才显)+ 点击 token 弹详情面板(完整 usage+缓存命中率+model)+ df-miniapp 同步

base前置(提升 prompt cache 命中率):chat.rs aug 拼 base 后(4处)+ knowledge_inject 知识拼 base 后(固定 base 前缀,cache 命中)

附修:replace_conversation 原 13 列 INSERT 丢消息级 token → 改 18 列

src/stores/ai.ts

@@ -108,7 +108,7 @@ const _stateBase: {
   archivedCollapsed: boolean
   foldedGroups: Record<string, boolean>
   searchQuery: string
-  lastTokenUsage: { prompt: number; completion: number; total: number } | null
+  lastTokenUsage: { prompt: number; completion: number; total: number; cache_hit?: number; cache_miss?: number; reasoning?: number } | null
   convTokenTotal: { prompt: number; completion: number; total: number } | null
 } = {
   messages: [],