feat(ai-session): add FlowPilot AI-powered troubleshooting sessions

Implements Phase 1 of the FlowPilot-First pivot — the core AI session
experience where engineers describe a problem and FlowPilot guides them
through structured diagnosis with selectable options, free-text escape
hatches, and auto-generated documentation on resolution.

Backend: AISession + AISessionStep models, FlowPilot Engine (LLM
orchestration with structured JSON output), Flow Matching Engine v1
(semantic + keyword + recency scoring), 8 API endpoints with auth,
rate limiting, and AI quota enforcement.

Frontend: Intake screen, conversational session view with sidebar,
step cards with options/actions/resolution suggestions, resolve/escalate
modals, documentation view with rating, session history integration,
and /pilot route with sidebar navigation.

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

frontend/src/components/flowpilot/FlowPilotOptions.tsx

@@ -0,0 +1,58 @@
+import { useState } from 'react'
+import { Check } from 'lucide-react'
+import { cn } from '@/lib/utils'
+import type { StepOptionSchema } from '@/types/ai-session'
+
+interface FlowPilotOptionsProps {
+  options: StepOptionSchema[]
+  onSelect: (value: string) => void
+  disabled?: boolean
+}
+
+export function FlowPilotOptions({ options, onSelect, disabled }: FlowPilotOptionsProps) {
+  const [selected, setSelected] = useState<string | null>(null)
+
+  const handleSelect = (value: string) => {
+    if (disabled) return
+    setSelected(value)
+    onSelect(value)
+  }
+
+  return (
+    <div className="grid grid-cols-1 gap-2 sm:grid-cols-2">
+      {options.map((option) => {
+        const isSelected = selected === option.value
+        return (
+          <button
+            key={option.value}
+            onClick={() => handleSelect(option.value)}
+            disabled={disabled}
+            className={cn(
+              'group relative rounded-xl border p-4 text-left transition-all',
+              'hover:border-[rgba(6,182,212,0.3)] hover:shadow-[0_0_20px_rgba(6,182,212,0.08)]',
+              'focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/40',
+              isSelected
+                ? 'border-primary/40 bg-primary/10'
+                : 'border-border bg-card/50',
+              disabled && 'pointer-events-none opacity-60'
+            )}
+          >
+            <div className="flex items-start justify-between gap-3">
+              <div className="flex-1">
+                <p className="text-sm font-medium text-foreground">{option.label}</p>
+                {option.followup_hint && (
+                  <p className="mt-1 text-xs text-muted-foreground">{option.followup_hint}</p>
+                )}
+              </div>
+              {isSelected && (
+                <span className="flex h-5 w-5 shrink-0 items-center justify-center rounded-full bg-primary/20 text-primary">
+                  <Check size={12} />
+                </span>
+              )}
+            </div>
+          </button>
+        )
+      })}
+    </div>
+  )
+}