Code Practice & Deterministic Static Evaluator

[editor-shannu]

📌 Overview

Adds a Code Practice step with a deterministic static evaluator to PyBe learning sessions. Learners now actively hand-code Python solutions from their reasoning rather than only reading AI-generated snippets.

🌟 Key Features & Changes

1. "Your Python attempt" Editor: Monospace code editor integrated directly into learning session forms.
2. "Check My Code" Instant Feedback Engine:
   • Pure Static Analysis: Inspects code via pattern rules without code execution (no eval or sandboxing needed).
   • 0–100 Score & Construct Coverage: Evaluates required concepts (loops, conditionals, functions, lists, dicts, etc.) and code craftsmanship.
   • Beginner Syntax Watch: Catches classic slips (single = in if statements, missing colons, Python-2 print, unbalanced brackets).
   • Nudge-based Feedback: Formats feedback as constructive questions rather than harsh compiler verdicts.
3. Persistent Code Review: Learner code and review metrics are saved with the session and displayed side-by-side with generated solutions.

🎓 Pedagogical Impact

Completes Kolb's Experiential Learning Cycle by fulfilling the 4th quadrant (Active Experimentation) — moving learners from reading generated code to building their own.