fix: subagent unique ID matching + AgentState serialization + pre-existing TS errors

- S-3: Thread task_id (UUID) through all 6 layers (LoopEvent → StreamChatEvent → kernel-types → gateway-client → streamStore) so subtasks are matched by ID, not description string
- AgentState: Add #[serde(rename_all = "lowercase")] to fix PascalCase serialization ("Running" → "running"), update frontend matcher
- S-1: Remove unused onClose prop from ArtifactPanel + ChatArea call site
- Fix hooks/index.ts: remove orphaned useAutomationEvents re-exports (module deleted)
- Fix types/index.ts: remove orphaned automation type/value re-exports (module deleted)
- Fix ChatArea.tsx: framer-motion 12 + React 19 type compat — use createElement + explicit any return type to avoid unknown-in-JSX-child error

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

desktop/src/components/ChatArea.tsx

@@ -1,4 +1,4 @@
-import { useState, useEffect, useRef, useCallback, useMemo, type MutableRefObject, type RefObject, type CSSProperties } from 'react';
+import { useState, useEffect, useRef, useCallback, useMemo, type MutableRefObject, type RefObject, type CSSProperties, createElement } from 'react';
 import { motion, AnimatePresence } from 'framer-motion';
 import { List, type ListImperativeAPI } from 'react-window';
 import { useChatStore, type Message } from '../store/chatStore';
@@ -262,7 +262,6 @@ export function ChatArea() {
       artifacts={artifacts}
       selectedId={selectedArtifactId}
       onSelect={selectArtifact}
-      onClose={() => setArtifactPanelOpen(false)}
     />
   );
 
@@ -609,18 +608,21 @@ function MessageBubble({ message, setInput }: { message: Message; setInput: (tex
   const isUser = message.role === 'user';
   const isThinking = message.streaming && !message.content;
 
-  // Extract typed arrays for JSX rendering (avoids TS2322 from && chain producing unknown)
+  // Extract typed arrays for JSX rendering
   const toolCallSteps: ToolCallStep[] | undefined = message.toolSteps;
   const subtaskList: Subtask[] | undefined = message.subtasks;
 
-  const renderToolSteps = (): React.ReactNode => {
+  // framer-motion 12 + React 19 type compat: motion.span/div return types resolve to `unknown`.
+  // Use createElement to bypass JSX child-context type inference.
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const renderToolChain = (): any => {
     if (isUser || !toolCallSteps || toolCallSteps.length === 0) return null;
-    return <ToolCallChain steps={toolCallSteps} isStreaming={!!message.streaming} />;
+    return createElement(ToolCallChain, { steps: toolCallSteps, isStreaming: !!message.streaming });
   };
-
-  const renderSubtasks = (): React.ReactNode => {
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const renderSubtasks = (): any => {
     if (isUser || !subtaskList || subtaskList.length === 0) return null;
-    return <TaskProgress tasks={subtaskList} className="mb-3" />;
+    return createElement(TaskProgress, { tasks: subtaskList, className: 'mb-3' });
   };
 
   // Download message as Markdown file
@@ -669,7 +671,7 @@ function MessageBubble({ message, setInput }: { message: Message; setInput: (tex
               />
             )}
             {/* Tool call steps chain (DeerFlow-inspired) */}
-            {renderToolSteps()}
+            {renderToolChain()}
             {/* Subtask tracking (DeerFlow-inspired) */}
             {renderSubtasks()}
             {/* Message content with streaming support */}

desktop/src/components/ai/ArtifactPanel.tsx

@@ -28,7 +28,6 @@ interface ArtifactPanelProps {
   artifacts: ArtifactFile[];
   selectedId?: string | null;
   onSelect: (id: string) => void;
-  onClose?: () => void;
   className?: string;
 }
 
@@ -74,7 +73,6 @@ export function ArtifactPanel({
   artifacts,
   selectedId,
   onSelect,
-  onClose: _onClose,
   className = '',
 }: ArtifactPanelProps) {
   const [viewMode, setViewMode] = useState<'preview' | 'code'>('preview');