feat(trees): expand from 1 to 87 algorithms with 5 new tracker variants - #34
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Add 86 new tree algorithms across 6 technique subcategories: - traversal (12 new): inorder/preorder/postorder iterative, level-order, reverse-level-order, zigzag, vertical-order, boundary, diagonal, morris - bst-operations (21 new): search, insert, delete, validation, kth-smallest, LCA, from-sorted-array, iterator, floor-ceil, range-sum, to-greater-tree, recover-swapped — each with recursive and iterative variants - properties (21 new): max/min depth, diameter, balanced, symmetric, count-complete, path-sum, max-path-sum, left-leaves, root-to-leaf paths, tilt, cousins, root-to-leaf numbers — with iterative variants - construction (6 new): build from preorder+inorder, postorder+inorder, serialize-deserialize, level-order — with iterative variants - manipulation (16 new): invert, flatten, right-side-view, same-tree, merge, subtree-of, LCA (general), delete-leaves, distribute-coins, flip-equivalent - advanced (10 new): AVL rotation, red-black insert, segment tree range sum/min, binary indexed tree, tree-to-DLL, pruning, n-ary traversal, huffman coding, expression tree evaluation Infrastructure: extend TreeNodeState (4→8), TreeVisualState (9 new fields), TreeNode (childrenIds for n-ary), 26 new StepTypes, TreeVisualizer updates for n-ary edges, dual-tree rendering, and operation labels. CI: increase vitest shards 10→12, E2E shards 14→16 for 453 total algorithms.
- Fix total algorithm count to 452 across README, catalog, testing - Fix CI shard counts: vitest 8→12, E2E 12→16 in testing.md - Fix algorithms-catalog.md category counts for searching (18), linked-lists (8), stacks-queues (28) - Add TreeNodeState entry to glossary with all 8 states - Add tree-specific debugging section to debugging.md - Fix VisualState kind count 12→17, add 5 missing string kinds - Add TreeNodeState→CSS token mapping to design-system.md - Update architecture.md: trees annotation, input editors table, input editor file count 6→10 - Fix tracker subclass count 14→34 in glossary - Fix session hooks count in claude-system.md and architecture.md
…te ID Storybook resolves both matrices/diagonal-traversal and trees/diagonal-traversal to the same story ID. Rename the tree variant to TreeDiagonalTraversalPipeline with a unique title to prevent the collision.
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Summary
Algorithm Breakdown
Test plan
npm run lint— 0 errorsnpm run format— cleannpm run typecheck— 0 errorsnpm test— 910 files, 8020 tests passed