Beginner edition: foundations, diagrams, interactivity, answer keys

- Set 00 · Foundations (Big-O from zero, recursion mechanics, hash
  internals, Python idioms, reading constraints)
- Guides: 12-step pattern decision tree + interview communication script
- Review dashboard (due re-solves, progress stats) as the first section
- Study-order fix: Baseline (arrays & hashing) now precedes Set 01;
  Set 01 groups renamed from "Part N" to set-scoped labels
- 10 theme-aware inline SVG diagrams (predicate strip, state machine,
  recursion tree vs DAG, heap mapping, BFS layers, DSU compression,
  stack skyline, LRU wiring, container geometry, interval timeline)
- 6 new step-through trace players (reversal, Floyd, Dutch flag,
  Dijkstra, deque window max, LRU) + 12 predict-then-reveal checks
- Hint + answer sketches for all 82 interrogation questions
- Flashcards: persistent miss tracking (Leitner-style resurfacing) and
  a multiple-choice quiz mode with scoring
- Nav filter box; compact masthead; beginner glosses (Markov,
  equivalence relation, tuple assignment)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: DeepCodeWork