Fix: Quota logic for admins and updated firestore rules

V5.14.7: Add fix_balance endpoint and balance safety check

Emergency Fix: Resolve NameError in Anchor Validation and Sync pedagogical prompts (V5.13.16)

v5.13.15: SymPy Coordinate Fix + UI Rendering Improvements

V5.13.14: OCR Reliability Layer (Upscaling/Binarization) and temperature=0.0 enforcement

V5.11.2 - Fix Firebase initialization in verify_token

Admin Dashboard fixes: consolidated stats, optimized counting, and removed DEV ADMIN bypass

Token Burner Prevention: fallback to raw OCR and slicing failsafe

V285.5: Multi-image ordering implementation and pedagogical grading logic

V5.10.1: Added 'המצאה', 'טעות שלי', 'מתנצל' to Blacklist & Verified 4 Layers

Force Rebuild: Updated restart trigger in main.py

FORCE RESTART - V5.10.1

Fix History Save Regression & Ask Teacher Auth - Emergency Fix

Fix Digital Binder history saving - Parameter propagation & logging

Implement Digital Binder (History) - Conditional saving for premium users

fix: Auto-provision dev-bypass-user with Admin roles on startup

fix: Backend crashes (AttributeError) and Quota bypass for DEV

fix: Bug 1 & 2 - Synchronize stats and add full user deletion endpoint

feat: add /admin/stats endpoint for dashboard usage tracking

fix: Robust token parsing and additional logging for DEV bypass

feat: Implementation of DEV auth bypass with strict guardrails

Security Hardening: Firebase Auth + Quota V2 Enforcement

feat: token pipeline and device fingerprinting

feat: Payment Page integration and Rebranding to המורה למתמטיקה

feat: Parent Report Engine (HTML to PDF) and SendGrid Delivery

feat: AI Assessment Analytics Infrastructure

feat: multi-image support for V2 endpoint

V5.8.5: Enhanced 5-unit math (3D Vectors, Solid Geom, Optimization) + Placeholder Fixes + HF Space compatibility

Fix: Clean production deployment with sse-starlette