feat(psa): add Update Ticket modal with note posting and status update

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/pages/TreeNavigationPage.tsx

@@ -25,6 +25,7 @@ import { Button } from '@/components/ui/Button'
 import { integrationsApi, sessionPsaApi } from '@/api/integrations'
 import { TicketPickerModal } from '@/components/session/TicketPickerModal'
 import { TicketLinkIndicator } from '@/components/session/TicketLinkIndicator'
+import { UpdateTicketModal } from '@/components/session/UpdateTicketModal'
 import type { PSATicketInfo } from '@/types/integrations'
 
 interface LocationState {
@@ -72,6 +73,7 @@ export function TreeNavigationPage() {
   // PSA ticket link state
   const [hasConnection, setHasConnection] = useState(false)
   const [showTicketPicker, setShowTicketPicker] = useState(false)
+  const [showUpdateModal, setShowUpdateModal] = useState(false)
   const [ticketInfo, setTicketInfo] = useState<PSATicketInfo | null>(null)
 
   const handleCopyCommand = (text: string) => {
@@ -697,6 +699,7 @@ export function TreeNavigationPage() {
               hasConnection={hasConnection}
               onLinkClick={() => setShowTicketPicker(true)}
               onUnlink={handleTicketUnlink}
+              onUpdateClick={session.psa_ticket_id ? () => setShowUpdateModal(true) : undefined}
               ticketInfo={ticketInfo}
             />
           )}
@@ -1305,6 +1308,13 @@ export function TreeNavigationPage() {
           onLinked={handleTicketLinked}
         />
       )}
+      {session && (
+        <UpdateTicketModal
+          open={showUpdateModal}
+          onClose={() => setShowUpdateModal(false)}
+          sessionId={session.id}
+        />
+      )}
       </div>
       </div>