feat(knowledge-flywheel): add Phase 3 Knowledge Flywheel — AI analysis, review queue, analytics

Phase 3 implementation:
- AI session analysis service that generates flow proposals from resolved sessions
- APScheduler job for batch processing pending analyses (max_instances=1)
- Knowledge gap detection (weak options, high escalation signals)
- Flow proposals CRUD with team admin review workflow (approve/edit/dismiss/reject)
- FlowPilot analytics dashboard with confidence tiers, PSA metrics, knowledge gaps
- In-session script generator component
- Review queue page with filtering and proposal detail panel

Bug fixes from review (12 total):
- Fix "Edit & Publish" navigating to non-existent /editor/new route
- Hide Approve button for enhancement proposals (require Edit & Publish)
- Add max_instances=1 to scheduler to prevent TOCTOU race
- Fix eventual_success case() double-counting failed retries
- Add tree_structure validation before creating tree from proposal
- Simplify script generator rendering condition
- Add severity style fallback, toFixed on rates, Link instead of <a href>
- Add toast.warning on dismiss failure, fix dedup for domain-less sessions
- Cast Decimal to int in knowledge gap evidence dicts

Also updates CLAUDE.md with lessons 67-71 and Phase 3 project structure.

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

frontend/src/components/flowpilot/FlowPilotStepCard.tsx

@@ -4,11 +4,13 @@ import { cn } from '@/lib/utils'
 import type { AISessionStepResponse, StepResponseRequest } from '@/types/ai-session'
 import { MarkdownContent } from '@/components/ui/MarkdownContent'
 import { FlowPilotOptions } from './FlowPilotOptions'
+import { InSessionScriptGenerator } from './InSessionScriptGenerator'
 
 interface FlowPilotStepCardProps {
   step: AISessionStepResponse
   isCurrentStep: boolean
   isProcessing: boolean
+  sessionId?: string
   onRespond: (response: StepResponseRequest) => void
 }
 
@@ -22,7 +24,7 @@ const STEP_TYPE_ICONS = {
   note: MessageSquare,
 } as const
 
-export function FlowPilotStepCard({ step, isCurrentStep, isProcessing, onRespond }: FlowPilotStepCardProps) {
+export function FlowPilotStepCard({ step, isCurrentStep, isProcessing, sessionId, onRespond }: FlowPilotStepCardProps) {
   const [freeText, setFreeText] = useState('')
   const [showFreeText, setShowFreeText] = useState(false)
   const [isCollapsed, setIsCollapsed] = useState(!isCurrentStep)
@@ -163,8 +165,19 @@ export function FlowPilotStepCard({ step, isCurrentStep, isProcessing, onRespond
             />
           )}
 
+          {/* In-session script generator */}
+          {!isResolutionSuggestion && (content.action_type as string) === 'script_generation' && sessionId && (
+            <InSessionScriptGenerator
+              templateId={(content.template_id as string) || ''}
+              preFilledParams={(content.pre_filled_params as Record<string, string>) || {}}
+              instructions={(content.instructions as string) || stepText}
+              sessionId={sessionId}
+              onRespond={onRespond}
+            />
+          )}
+
           {/* Action step buttons */}
-          {!isResolutionSuggestion && step.step_type === 'action' && (
+          {!isResolutionSuggestion && step.step_type === 'action' && (content.action_type as string) !== 'script_generation' && (
             <div className="flex gap-2">
               <button
                 onClick={() => handleActionComplete(true)}