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/ChatWorkbench.tsx

@@ -6,6 +6,7 @@ import type { ChatMessage, ProcessArtifact, ProcessEvent, ProcessRun } from '@/t
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
 import { MessageList } from '@/components/chat-workbench/MessageList';
 import { ArtifactSidebar } from '@/components/chat-workbench/ArtifactSidebar';
+import { ProcessLane } from '@/components/chat-workbench/ProcessLane';
 import { pickAppText } from '@/lib/i18n/core';
 import { useAppI18n } from '@/lib/i18n/provider';
 
@@ -20,6 +21,7 @@ export function ChatWorkbench({
   selectedRunId,
   onSelectRun,
   onCancelRun,
+  onFeedback,
 }: {
   messages: ChatMessage[];
   isThinking: boolean;
@@ -31,6 +33,7 @@ export function ChatWorkbench({
   selectedRunId: string | null;
   onSelectRun: (runId: string) => void;
   onCancelRun: (runId: string) => void;
+  onFeedback: (runId: string, feedbackType: 'satisfied' | 'revise' | 'abandon') => void;
 }) {
   const { locale } = useAppI18n();
   const [isDesktop, setIsDesktop] = React.useState(() =>
@@ -72,9 +75,14 @@ export function ChatWorkbench({
         selectedRunArtifacts.length > 0
       )
   );
-  const desktopColumns = hasResultsPanel
-    ? 'grid-cols-[minmax(0,1fr)_360px]'
-    : 'grid-cols-[minmax(0,1fr)]';
+  const hasProcessPanel = processRuns.length > 0;
+  const desktopColumns = hasProcessPanel && hasResultsPanel
+    ? 'grid-cols-[minmax(0,1fr)_340px_360px]'
+    : hasProcessPanel
+      ? 'grid-cols-[minmax(0,1fr)_340px]'
+      : hasResultsPanel
+        ? 'grid-cols-[minmax(0,1fr)_360px]'
+        : 'grid-cols-[minmax(0,1fr)]';
 
   const messageList = (
     <MessageList
@@ -88,6 +96,7 @@ export function ChatWorkbench({
       selectedRunId={selectedRun?.run_id || null}
       onSelectRun={onSelectRun}
       onCancelRun={onCancelRun}
+      onFeedback={onFeedback}
     />
   );
 
@@ -97,6 +106,17 @@ export function ChatWorkbench({
         <div className="min-h-0">
           {messageList}
         </div>
+        {hasProcessPanel && (
+          <div className="min-h-0">
+            <ProcessLane
+              runs={processRuns}
+              events={processEvents}
+              selectedRunId={selectedRun?.run_id || null}
+              onSelectRun={onSelectRun}
+              onCancelRun={onCancelRun}
+            />
+          </div>
+        )}
         {hasResultsPanel && (
           <div className="min-h-0">
             <ArtifactSidebar
@@ -112,26 +132,40 @@ export function ChatWorkbench({
 
   return (
     <div className="h-full">
-      {!hasResultsPanel ? (
+      {!hasResultsPanel && !hasProcessPanel ? (
         messageList
       ) : (
         <Tabs defaultValue="chat" className="h-full flex flex-col">
           <div className="px-4 pt-3 border-b border-border">
-            <TabsList className="grid w-full grid-cols-2">
+            <TabsList className={`grid w-full ${hasResultsPanel ? 'grid-cols-3' : 'grid-cols-2'}`}>
               <TabsTrigger value="chat">{pickAppText(locale, '聊天', 'Chat')}</TabsTrigger>
-              <TabsTrigger value="results">{pickAppText(locale, '结果', 'Results')}</TabsTrigger>
+              <TabsTrigger value="process">{pickAppText(locale, '过程', 'Process')}</TabsTrigger>
+              {hasResultsPanel && (
+                <TabsTrigger value="results">{pickAppText(locale, '结果', 'Results')}</TabsTrigger>
+              )}
             </TabsList>
           </div>
           <TabsContent value="chat" className="flex-1 min-h-0 mt-0">
             {messageList}
           </TabsContent>
-          <TabsContent value="results" className="flex-1 min-h-0 mt-0">
-            <ArtifactSidebar
-              selectedRun={selectedRun}
+          <TabsContent value="process" className="flex-1 min-h-0 mt-0">
+            <ProcessLane
+              runs={processRuns}
               events={processEvents}
-              artifacts={processArtifacts}
+              selectedRunId={selectedRun?.run_id || null}
+              onSelectRun={onSelectRun}
+              onCancelRun={onCancelRun}
             />
           </TabsContent>
+          {hasResultsPanel && (
+            <TabsContent value="results" className="flex-1 min-h-0 mt-0">
+              <ArtifactSidebar
+                selectedRun={selectedRun}
+                events={processEvents}
+                artifacts={processArtifacts}
+              />
+            </TabsContent>
+          )}
         </Tabs>
       )}
     </div>