修复: DeepSeek 400 全量扫描 + 队列 per-conv 隔离

- openai_compat: 扫描所有 assistant 消息剥离 orphan tool_calls（原仅查末条）
- queue 加 conversationId 字段，按会话精准 drain
- regenerate/editMessage 只清本会话排队消息
- newConversation 保留旧会话排队消息
- AiError 只清出错会话的队列项

src-tauri/src/commands/ai/augmentation/resolvers.rs

@@ -304,12 +304,15 @@ impl MentionResolver for SkillResolver {
             }
         };
         // 取剥 frontmatter 正文(注入用);None = 缓存未命中或文件读失败
-        let body = read_skill_content_stripped(&name).ok_or_else(|| ResolveError::NotFound {
-            kind: "skill".to_string(),
-            ref_id: name.clone(),
-        })?;
+        let body = read_skill_content_stripped(name.clone())
+            .await
+            .ok_or_else(|| ResolveError::NotFound {
+                kind: "skill".to_string(),
+                ref_id: name.clone(),
+            })?;
         // source 从缓存取 SkillInfo.source;失败(缓存不一致)默认 "skill"
         let source = crate::commands::ai::skills::skills_cached()
+            .await
             .into_iter()
             .find(|s| s.name == name)
             .map(|s| s.source)