feat(psa): ticket queue dashboard with board selector and session auto-start

- Add PSABoard type + list_boards() to CW provider (cached 1h)
- Extend search_tickets with assigned_to_me, unassigned, board_ids, page, page_size
- New GET /integrations/psa/boards endpoint
- New TicketQueue dashboard component: My Tickets / Unassigned tabs,
  multi-select board filter, Load more pagination, Start Session per ticket
- Add TicketQueue to QuickStartPage after active sessions
- FlowPilotSessionPage auto-starts with ticket context when navigated
  from TicketQueue (psaTicketId + psaTicket in location.state)

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

frontend/src/api/integrations.ts

@@ -1,6 +1,6 @@
 import { apiClient } from './client'
 import type { PsaConnectionResponse, PsaConnectionCreate, PsaConnectionUpdate, PsaConnectionTestResponse } from '@/types'
-import type { TicketLinkResponse, PSATicketSearchResult, PSATicketInfo, PSATicketStatusItem, PsaPreviewResponse, PsaPostResponse, PsaPostLogEntry, PsaMemberResponse, PsaMemberMappingResponse, AutoMatchResult, FlowpilotSettings } from '@/types/integrations'
+import type { PSABoard, TicketLinkResponse, PSATicketSearchResult, PSATicketInfo, PSATicketStatusItem, PsaPreviewResponse, PsaPostResponse, PsaPostLogEntry, PsaMemberResponse, PsaMemberMappingResponse, AutoMatchResult, FlowpilotSettings } from '@/types/integrations'
 
 export const integrationsApi = {
   getConnection: () =>
@@ -13,8 +13,18 @@ export const integrationsApi = {
     apiClient.delete(`/integrations/psa/connections/${id}`),
   testConnection: (id: string) =>
     apiClient.post<PsaConnectionTestResponse>(`/integrations/psa/connections/${id}/test`).then(r => r.data),
+  listBoards: () =>
+    apiClient.get<PSABoard[]>('/integrations/psa/boards').then(r => r.data),
   searchTickets: (params: { query?: string; board_id?: number; include_closed?: boolean }) =>
     apiClient.get<PSATicketSearchResult[]>('/integrations/psa/tickets/search', { params }).then(r => r.data),
+  searchTicketsQueue: (params: {
+    assigned_to_me?: boolean
+    unassigned?: boolean
+    board_ids?: string
+    page?: number
+    page_size?: number
+  }) =>
+    apiClient.get<PSATicketSearchResult[]>('/integrations/psa/tickets/search', { params }).then(r => r.data),
   getTicket: (id: string) =>
     apiClient.get<PSATicketInfo>(`/integrations/psa/tickets/${id}`).then(r => r.data),
   getTicketStatuses: (ticketId: string) =>