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>

crates/zclaw-runtime/src/loop_runner.rs

@@ -1074,6 +1074,7 @@ pub enum LoopEvent {
     ToolEnd { name: String, output: serde_json::Value },
     /// Sub-agent task status update (started/running/completed/failed)
     SubtaskStatus {
+        task_id: String,
         description: String,
         status: String,
         detail: Option<String>,