feat(v5.7.4): Semantic Closure Gate, Delete unused files, PDF Fixes

hotfix: UI Cart Sync Amnesia Fix (re-price items on param mutation)

hotfix: Spec v5.7 Live QA Fixes (Auto-commit, terminology, and intent reset guardrails)

V5.7.2: Final Demo Polish - Unified Product State (active_products) & Intent Hardening Guardrails

V5.7.1: Unified Product State Authority - Fixed post-pricing amnesia & enabled multi-product support

V5.7: Stateful Advisor Engine, Mini-RAG JIT Knowledge, UI Override Fix & Regex Guardrail

V5.6.1: Deterministic Sanitizer & Imposition-Aware Pricing - Final Demo Polish

V5.4: Resolve False Zero Prices & Implement Partial Transparency - Hebrew PDF Support Hardened

Spec v5.3: Operation Beit Yitzhak Hardening (Domain Gate, Visual Trust, Semantic Aging)

Upgrade: Planner v4.2 (Smart Gateway) & Integrity Layer v1.0 Integration

feat: AI Governance Law v1.0 - Deterministic Vision & Structured Output

Phase 2 Sprint 2.2: Vision Isolation - Multimodal AI & Frontend Attachment Pipeline

Phase 2 Sprint 2.1: Budget Kill Switch (.0), Direct GCP Storage Protocol, and 10MB Image Gatekeeper