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/SessionDocView.tsx

@@ -1,15 +1,111 @@
-import { FileText, Clock, CheckCircle2, ArrowUpRight, Star } from 'lucide-react'
+import { useState } from 'react'
+import { FileText, Clock, CheckCircle2, ArrowUpRight, Star, AlertTriangle, Loader2, RefreshCw, Info } from 'lucide-react'
+import { aiSessionsApi } from '@/api'
+import { toast } from '@/lib/toast'
 import type { SessionDocumentation } from '@/types/ai-session'
 
 interface SessionDocViewProps {
   documentation: SessionDocumentation
   onRate?: (rating: number) => void
   currentRating?: number | null
+  psaPushStatus?: string | null
+  psaPushError?: string | null
+  memberMappingWarning?: string | null
+  sessionId?: string
+  ticketId?: string | null
 }
 
-export function SessionDocView({ documentation, onRate, currentRating }: SessionDocViewProps) {
+export function SessionDocView({
+  documentation,
+  onRate,
+  currentRating,
+  psaPushStatus,
+  psaPushError,
+  memberMappingWarning,
+  sessionId,
+  ticketId,
+}: SessionDocViewProps) {
+  const [retrying, setRetrying] = useState(false)
+  const [currentPushStatus, setCurrentPushStatus] = useState(psaPushStatus)
+  const [currentPushError, setCurrentPushError] = useState(psaPushError)
+
+  const handleRetry = async () => {
+    if (!sessionId) return
+    setRetrying(true)
+    try {
+      const result = await aiSessionsApi.retryPsaPush(sessionId)
+      setCurrentPushStatus(result.psa_push_status)
+      setCurrentPushError(result.psa_push_error)
+      if (result.psa_push_status === 'sent') {
+        toast.success('Documentation pushed to ticket successfully')
+      }
+    } catch {
+      toast.error('Retry failed')
+    } finally {
+      setRetrying(false)
+    }
+  }
+
   return (
     <div className="space-y-5">
+      {/* PSA Push Status */}
+      {currentPushStatus && currentPushStatus !== 'no_psa' && (
+        <div
+          className={`rounded-xl border px-4 py-3 flex items-center gap-3 ${
+            currentPushStatus === 'sent'
+              ? 'border-emerald-400/20 bg-emerald-400/5'
+              : currentPushStatus === 'pending_retry'
+                ? 'border-amber-400/20 bg-amber-400/5'
+                : 'border-rose-500/20 bg-rose-500/5'
+          }`}
+        >
+          {currentPushStatus === 'sent' && (
+            <>
+              <CheckCircle2 size={16} className="text-emerald-400 shrink-0" />
+              <span className="text-sm text-emerald-400">
+                Documentation pushed to ticket {ticketId ? `#${ticketId}` : ''}
+              </span>
+            </>
+          )}
+          {currentPushStatus === 'pending_retry' && (
+            <>
+              <Loader2 size={16} className="text-amber-400 shrink-0 animate-spin" />
+              <span className="text-sm text-amber-400">
+                Documentation queued for push — will sync shortly
+              </span>
+            </>
+          )}
+          {currentPushStatus === 'failed' && (
+            <>
+              <AlertTriangle size={16} className="text-rose-500 shrink-0" />
+              <div className="flex-1">
+                <span className="text-sm text-rose-500">
+                  Failed to push to ticket{currentPushError ? ` — ${currentPushError}` : ''}
+                </span>
+              </div>
+              <button
+                onClick={handleRetry}
+                disabled={retrying}
+                className="flex items-center gap-1.5 rounded-lg bg-rose-500/10 px-3 py-1.5 text-xs font-medium text-rose-500 hover:bg-rose-500/20 transition-colors disabled:opacity-50"
+              >
+                {retrying ? <Loader2 size={12} className="animate-spin" /> : <RefreshCw size={12} />}
+                Retry
+              </button>
+            </>
+          )}
+        </div>
+      )}
+
+      {/* Member mapping warning */}
+      {memberMappingWarning && (
+        <div className="rounded-xl border border-blue-400/20 bg-blue-400/5 px-4 py-3 flex items-start gap-3">
+          <Info size={16} className="text-blue-400 shrink-0 mt-0.5" />
+          <span className="text-sm text-blue-400">
+            Time entry was not created — {memberMappingWarning} Session timing is included in the ticket note.
+          </span>
+        </div>
+      )}
+
       {/* Header */}
       <div className="glass-card-static p-5">
         <div className="flex items-start gap-3">