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/types/flow-proposal.ts

@@ -0,0 +1,38 @@
+// ── Flow Proposals (Knowledge Flywheel / Review Queue) ──
+
+export interface FlowProposalSummary {
+  id: string
+  proposal_type: 'new_flow' | 'enhancement' | 'branch_addition' | 'auto_reinforced'
+  title: string
+  description: string | null
+  problem_domain: string | null
+  confidence_score: number
+  supporting_session_count: number
+  status: 'pending' | 'approved' | 'modified' | 'rejected' | 'dismissed' | 'auto_reinforced'
+  target_flow_id: string | null
+  source_session_id: string
+  created_at: string
+}
+
+export interface FlowProposalDetail extends FlowProposalSummary {
+  proposed_flow_data: Record<string, unknown>
+  proposed_diff: Record<string, unknown> | null
+  supporting_session_ids: string[]
+  reviewer_notes: string | null
+  reviewed_by: string | null
+  reviewed_at: string | null
+}
+
+export interface ReviewProposalRequest {
+  action: 'approve' | 'reject' | 'modify' | 'dismiss'
+  reviewer_notes?: string | null
+  modified_flow_data?: Record<string, unknown> | null
+}
+
+export interface FlowProposalStats {
+  pending_count: number
+  approved_this_week: number
+  rejected_this_week: number
+  auto_reinforced_this_week: number
+  top_domains: Array<{ domain: string; count: number }>
+}

frontend/src/types/flowpilot-analytics.ts

@@ -0,0 +1,79 @@
+export interface MTTRDataPoint {
+  date: string
+  mttr_minutes: number
+  session_count: number
+}
+
+export interface DomainBreakdown {
+  domain: string
+  total: number
+  resolved: number
+  escalated: number
+  resolution_rate: number
+}
+
+export interface ConfidenceBreakdown {
+  guided_sessions: number
+  guided_resolution_rate: number
+  exploring_sessions: number
+  exploring_resolution_rate: number
+  discovery_sessions: number
+  discovery_resolution_rate: number
+}
+
+export interface DomainCoverage {
+  domain: string
+  flow_count: number
+  session_count: number
+  guided_rate: number
+}
+
+export interface KnowledgeCoverage {
+  total_flows: number
+  ai_generated_flows: number
+  total_proposals_pending: number
+  proposals_approved_this_period: number
+  proposals_rejected_this_period: number
+  coverage_by_domain: DomainCoverage[]
+}
+
+export interface PsaMetrics {
+  ticket_link_rate: number
+  auto_push_success_rate: number
+  auto_push_retry_success_rate: number
+  total_time_entries_logged: number
+  total_hours_logged: number
+}
+
+export interface FlowPilotDashboard {
+  period: string
+  total_sessions: number
+  resolved_sessions: number
+  escalated_sessions: number
+  abandoned_sessions: number
+  resolution_rate: number
+  avg_steps_to_resolution: number
+  avg_session_duration_minutes: number
+  avg_rating: number | null
+  mttr_minutes: number | null
+  mttr_trend: MTTRDataPoint[]
+  sessions_by_domain: DomainBreakdown[]
+  confidence_breakdown: ConfidenceBreakdown
+  knowledge_coverage: KnowledgeCoverage
+  psa_metrics: PsaMetrics | null
+}
+
+export interface KnowledgeGap {
+  gap_type: string
+  domain: string | null
+  severity: 'high' | 'medium' | 'low'
+  title: string
+  description: string
+  evidence: Record<string, unknown>
+  suggested_action: string
+}
+
+export interface KnowledgeGapReport {
+  generated_at: string
+  gaps: KnowledgeGap[]
+}

frontend/src/types/index.ts

@@ -13,6 +13,8 @@ export * from './analytics'
 export * from './copilot'
 export type { AssistantChat, AssistantChatMessage, ChatListItem, ChatMessageResponse, RetentionSettings } from './assistant-chat'
 export * from './ai-session'
+export * from './flow-proposal'
+export * from './flowpilot-analytics'
 
 // API response wrapper types
 export interface PaginatedResponse<T> {

frontend/src/types/scripts.ts

@@ -73,7 +73,8 @@ export interface ScriptTemplateDetail extends ScriptTemplateListItem {
 export interface ScriptGenerateRequest {
   template_id: string
   parameters: Record<string, unknown>
-  session_id?: string // Phase 3: passed when generating inside a session
+  session_id?: string // Legacy tree-based session
+  ai_session_id?: string // FlowPilot AI session
 }
 
 export interface ScriptGenerateResponse {