feat(beaver): 完成Task Team功能v1实现，重构后端架构支持统一内核

新增内部Task系统，包括验证、反馈门控机制，实现自动质量验证
(通过率>=0.75)和用户反馈闭环(satisfied/revise/abandon)。

实现Agent Team v1协调器，支持sequence/parallel/dag执行策略，
sub-agent复用主AgentLoop，每个run使用独立memory snapshot。

建立Skill学习pipeline，包含draft/审核/发布/回滚完整生命周期，
通过Task验证通过且用户满意才生成学习候选。

重构目录结构，移除third_party依赖，建立统一engine内核，
所有agent共享运行时基础组件。

更新ContextBuilder清理provider消息字段，增强SkillContext版本管理，
集成TaskExecutionPlanner和TaskSkillResolver实现技能解析机制。

app-instance/frontend/components/chat-workbench/AgentTeamBlock.tsx

@@ -161,6 +161,36 @@ function runSummary(run: ProcessRun, feed: AgentFeedItem[], locale: 'zh-CN' | 'e
   return latestAssistant?.text || pickAppText(locale, '已完成子任务处理', 'Subtask processing completed');
 }
 
+function SkillChips({ metadata }: { metadata?: Record<string, unknown> }) {
+  const rawSelected = metadata?.selected_skill_names;
+  const rawEphemeral = metadata?.ephemeral_skill_names;
+  const selected = Array.isArray(rawSelected) ? rawSelected.map(String).filter(Boolean) : [];
+  const ephemeral = Array.isArray(rawEphemeral) ? rawEphemeral.map(String).filter(Boolean) : [];
+  const draftId = typeof metadata?.generated_skill_draft_id === 'string' ? metadata.generated_skill_draft_id : '';
+  if (selected.length === 0 && ephemeral.length === 0 && !draftId) {
+    return null;
+  }
+  return (
+    <div className="mt-1.5 flex flex-wrap gap-1.5">
+      {selected.map((name) => (
+        <Badge key={`skill:${name}`} variant="secondary" className="max-w-[128px] truncate text-[10px]">
+          skill:{name}
+        </Badge>
+      ))}
+      {ephemeral.map((name) => (
+        <Badge key={`ephemeral:${name}`} variant="outline" className="max-w-[128px] truncate text-[10px]">
+          ephemeral:{name}
+        </Badge>
+      ))}
+      {draftId && (
+        <Badge variant="outline" className="text-[10px]">
+          draft:{draftId.slice(0, 8)}
+        </Badge>
+      )}
+    </div>
+  );
+}
+
 function useRunCardPhases(runs: ProcessRun[]) {
   const [phases, setPhases] = React.useState<Record<string, RunCardPhase>>(() =>
     Object.fromEntries(
@@ -288,10 +318,11 @@ function LiveAgentCard({
         <div className="min-w-0">
           <div className="flex items-center gap-2 text-[11px] font-medium uppercase tracking-[0.18em] text-muted-foreground">
             <span className={cn('h-2 w-2 rounded-full', accent.dot)} />
-            <span>{pickAppText(locale, '子 Agent', 'Sub-agent')}</span>
+            <span>{pickAppText(locale, '子任务', 'Subtask')}</span>
           </div>
           <div className={cn('mt-1 truncate text-sm font-semibold', accent.title)}>{run.actor_name}</div>
           <div className="mt-1 line-clamp-2 text-xs text-muted-foreground">{run.title}</div>
+          <SkillChips metadata={run.metadata} />
         </div>
         <Badge variant="outline" className={cn('border', statusTone(run.status))}>
           {appStatusLabel(run.status, locale)}
@@ -302,7 +333,7 @@ function LiveAgentCard({
         <div className="max-h-[280px] space-y-2.5 overflow-y-auto pr-1">
           {feed.length === 0 && (
             <div className="rounded-2xl border border-dashed border-border/60 bg-background/60 px-4 py-5 text-center text-sm text-muted-foreground">
-              {pickAppText(locale, '等待子 agent 输出...', 'Waiting for sub-agent output...')}
+              {pickAppText(locale, '等待子任务输出...', 'Waiting for subtask output...')}
             </div>
           )}
           {feed.map((item) => (
@@ -445,13 +476,13 @@ export function AgentTeamBlock({
         <div>
           <div className="inline-flex items-center gap-2 text-xs font-medium uppercase tracking-[0.2em] text-muted-foreground">
             <Sparkles className="h-3.5 w-3.5" />
-            {pickAppText(locale, '智能体团队', 'Agent team')}
+            {pickAppText(locale, '任务子流程', 'Task subprocess')}
           </div>
           <div className="mt-1.5 text-base font-semibold text-foreground">{rootRun.title}</div>
           <p className="mt-1 text-sm text-muted-foreground">
             {liveCount > 0
-              ? pickAppText(locale, `主 agent 正在协调 ${liveCount} 个运行中的 sub-agent`, `Lead agent is coordinating ${liveCount} running sub-agents`)
-              : pickAppText(locale, '子 agent 已完成，结果已折叠为摘要卡片', 'Sub-agents are done. Results are folded into summary cards')}
+              ? pickAppText(locale, `主 Agent 正在协调 ${liveCount} 个运行中的子任务`, `Main Agent is coordinating ${liveCount} running subtasks`)
+              : pickAppText(locale, '子任务已完成，结果已折叠为摘要卡片', 'Subtasks are done. Results are folded into summary cards')}
           </p>
         </div>
         <div className="flex items-center gap-2">
@@ -462,7 +493,7 @@ export function AgentTeamBlock({
             </Button>
           )}
           <Badge variant="outline" className="border-border/70 bg-background/55 text-foreground/85">
-            {pickAppText(locale, `${memberRuns.length} 个 sub-agent`, `${memberRuns.length} sub-agents`)}
+            {pickAppText(locale, `${memberRuns.length} 个子任务`, `${memberRuns.length} subtasks`)}
           </Badge>
           <Badge variant="outline" className={cn('border', statusTone(rootRun.status))}>
             {appStatusLabel(rootRun.status, locale)}