feat(ai-session): add Phase 2 PSA integration, escalation handoff, and session management

Phase 2 of the FlowPilot-First Pivot connecting AI sessions to ConnectWise PSA:

Slice 1 — PSA Ticket Intake:
- FlowPilotEngine accepts psa_ticket intake with graceful CW API fallback
- Ticket picker on intake screen (refactored TicketPickerModal for dual-mode)
- Ticket context card in session sidebar

Slice 2 — Auto Documentation Push:
- PSA documentation service with resolution/escalation note formatting
- Time entry creation via new ConnectWise provider method
- Automatic retry scheduler (APScheduler, 5min interval, 3 retries)
- PSA push status indicators in frontend with manual retry button
- Member mapping warning when CW member not mapped

Slice 3 — Session Pause/Resume & Escalation Handoff:
- Pause/resume endpoints for same-engineer session bookmarking
- Escalation flow: requesting_escalation status, self-escalation blocked
- Enhanced escalation package with LLM-generated hypotheses/suggestions
- Pickup endpoint with continue/fresh resume modes and briefing step
- Escalation queue (sidebar nav + dedicated page)
- SessionBriefing component with continue/fresh choice UI
- EscalateModal with PSA-aware button text

Slice 4 — Mid-Session Ticket Linking:
- Link ticket retroactively with context injection into system prompt
- Link Ticket button in session sidebar

Slice 5 — FlowPilot PSA Settings:
- Settings tab on IntegrationsPage with 7 configurable options
- Stored as flowpilot_settings JSONB on PsaConnection

Database: 2 migrations (flowpilot_settings, psa_post_log changes, status constraint)

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

frontend/src/components/flowpilot/SessionTicketCard.tsx

@@ -0,0 +1,106 @@
+import { ExternalLink, Cpu, Building2 } from 'lucide-react'
+
+interface TicketData {
+  ticket?: {
+    id?: number | string
+    summary?: string
+    status?: string
+    priority?: string
+    board?: string
+  }
+  company?: {
+    name?: string
+  }
+  configurations?: Array<{
+    device_identifier?: string
+    type?: string
+    ip_address?: string
+  }>
+}
+
+interface SessionTicketCardProps {
+  ticketId: string
+  ticketData: TicketData | null
+  siteUrl?: string
+}
+
+export function SessionTicketCard({ ticketId, ticketData, siteUrl }: SessionTicketCardProps) {
+  const ticket = ticketData?.ticket
+  const company = ticketData?.company
+  const configs = ticketData?.configurations
+
+  const ticketUrl = siteUrl
+    ? `${siteUrl}/v4_6_release/services/system_io/Service/fv_sr100_request.rails?service_recid=${ticketId}`
+    : null
+
+  return (
+    <div className="rounded-xl border border-primary/20 bg-primary/5 p-3 space-y-2">
+      <div className="flex items-start justify-between">
+        <h4 className="font-label text-[0.625rem] uppercase tracking-wider text-[#5a6170]">
+          Linked Ticket
+        </h4>
+        {ticketUrl && (
+          <a
+            href={ticketUrl}
+            target="_blank"
+            rel="noopener noreferrer"
+            className="text-muted-foreground hover:text-primary transition-colors"
+            title="Open in ConnectWise"
+          >
+            <ExternalLink size={12} />
+          </a>
+        )}
+      </div>
+
+      <p className="text-sm font-semibold text-foreground">
+        <span className="text-primary">#{ticketId}</span>
+        {ticket?.summary && (
+          <span> — {ticket.summary}</span>
+        )}
+      </p>
+
+      <div className="flex flex-wrap items-center gap-x-2 gap-y-1 text-xs text-muted-foreground">
+        {company?.name && (
+          <span className="flex items-center gap-1">
+            <Building2 size={10} />
+            {company.name}
+          </span>
+        )}
+        {ticket?.priority && (
+          <>
+            <span className="text-[#5a6170]">&bull;</span>
+            <span>{ticket.priority}</span>
+          </>
+        )}
+        {ticket?.status && (
+          <>
+            <span className="text-[#5a6170]">&bull;</span>
+            <span>{ticket.status}</span>
+          </>
+        )}
+      </div>
+
+      {configs && configs.length > 0 && (
+        <div className="border-t border-border/50 pt-2 mt-2">
+          <p className="font-label text-[0.5625rem] uppercase tracking-wider text-[#5a6170] mb-1">
+            Devices
+          </p>
+          <div className="space-y-0.5">
+            {configs.slice(0, 3).map((cfg, i) => (
+              <div key={i} className="flex items-center gap-1.5 text-xs text-muted-foreground">
+                <Cpu size={10} />
+                <span>{cfg.device_identifier}</span>
+                {cfg.type && <span className="text-[#5a6170]">({cfg.type})</span>}
+              </div>
+            ))}
+            {configs.length > 3 && (
+              <p className="text-[0.625rem] text-[#5a6170]">
+                +{configs.length - 3} more
+              </p>
+            )}
+          </div>
+        </div>
+      )}
+    </div>
+  )
+}