V5.14.7: Add fix_balance endpoint and balance safety check

V9.1.0: Prevent Client Crashes - AI Diet (40-char limit)

V9.0.5: Prevent SSE Disconnects - Non-Blocking SymPy Validator & Timeout Optimization

V9.0.4: CRITICAL PROMPT HOTFIX - Anti-Hallucination (Zero Assumptions Rule)

V9.0.3: CRITICAL Hotfixes - Anchor Validator NameError & SymPy LaTeX Multiplication Support

V9.0.2: CRITICAL Fix - Data Anchor Failure via Robust OCR Payload Flattener

V9.0.1: SymPy Pipeline Hardening (Aggressive Sanitizer, Hebrew & Arrow Stripping)

V9.0.0: Final Stabilization (Fixed NameError, Prompt Hardening, OCR Flattening)

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

Fix NameError in build_ast_metadata and improve logging

DEV: Full sync of stable code and Anti-Paradox Prompts (V5.13.16)

DEV: Apply Anti-Paradox Protocol and Logical Arrow ban (V5.13.16)

DEV: SymPy Stabilization, OCR Hotfix, and UI Prep (V5.13.16)

fix: SymPy squashed equations and enforce RULE 4 in orchestrator

chore: force rebuild on DEV HF Space (v1.1)

v5.13.15: SymPy Coordinate Fix + UI Rendering Improvements

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

V5.11.3 - EMERGENCY SECURITY FIX: Disable local credential files and purge secrets

V5.11.2 - Fix Firebase initialization in verify_token

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

chore: remove sensitive credentials and update gitignore

Token Burner Prevention: fallback to raw OCR and slicing failsafe

Fix NameError: List is not defined in orchestrator.py

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

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

feat(backend): V281.0 - Vision-First OCR, Visuals robustness (Pow fix), and Rigid Graph Identification

V280.0: Robust Math Validation Fixes & Model Lockdown (RCE Protection, Multiline Regex, Soft Fail)

QA Cycle 2.1: Data Slicing, Hotfix refinement, Firestore fix, and UI Safety updates

Force Rebuild: Updated restart trigger in main.py

Critical QA Fixes: Bug 1-4 (Data Isolation, Hotfix Sanity, History Save, Visuals Stability)

V5.10.4: History Tier Fix (admin_unlimited) & Vision Extractor Graph Descriptions

V5.10.3: History Debugging & Graph Anti-Hallucination Prompt Fix

V5.10.2: Fix kwargs collision in smart_solve - pop explicit keys before spread

FORCE RESTART - V5.10.1

Implement SymPy Algebraic Verification & Self-Correction - Resolved critical regression and auth

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

V5.9.10: Inactivity Push Notifications & CMS Implementation

fix: Robust Firebase initialization with environment variable support and lazy loading

fix: Split-Brain resolved - DEV config now points to buddy-math-dev project

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

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

fix: Robust server-side auth fallback for DEV environment

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

debug: Add detailed environment logging to config.py

fix: Auto-detect DEV environment using Hugging Face SPACE_ID

feat: Implementation of DEV auth bypass with strict guardrails