Fix OpenCode sessions not showing up immediately in sessions list

- Fix session ID regex parsing to correctly capture the ID after 'Session started'
  instead of incorrectly capturing 'started' as the ID
- Add query invalidation when new session is created so the sessions list
  refreshes immediately instead of waiting for the 10-second polling interval

Author: gricha

web/src/components/Chat.tsx

@@ -538,9 +538,9 @@ export function Chat({ workspaceName, sessionId: initialSessionId, onSessionId,
 
         if (msg.type === 'system') {
           if (msg.content.startsWith('Session started')) {
-            const match = msg.content.match(/Session (\S+)/)
+            const match = msg.content.match(/Session started:?\s+(\S+)/)
             if (match) {
-              const newSessionId = match[1]
+              const newSessionId = match[1].replace(/\.+$/, '')
               setSessionId(newSessionId)
               onSessionIdRef.current?.(newSessionId)
             }

web/src/pages/WorkspaceDetail.tsx

@@ -227,9 +227,10 @@ export function WorkspaceDetail() {
   const handleSessionId = useCallback((sessionId: string) => {
     if (name && chatMode?.type === 'chat' && chatMode.agentType) {
       api.recordSessionAccess(name, sessionId, chatMode.agentType).catch(() => {})
+      queryClient.invalidateQueries({ queryKey: ['sessions', name] })
     }
     setChatMode((prev) => prev?.type === 'chat' ? { ...prev, sessionId } : prev)
-  }, [name, chatMode])
+  }, [name, chatMode, queryClient])
 
   const { data: hostInfo, isLoading: hostLoading } = useQuery({
     queryKey: ['hostInfo'],