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* feat(component): similarity-scale slider controller Single-slider similarity demo for Module 2. Fixed △ABC, scaled △A'B'C' computed each frame as `centroid_target + k · (vertex − centroid_ABC)` for k ∈ [0.5, 2]. The slider's input event is the only event listener — no Pointer Events here (we're not dragging vertices in this MVP). AbortController teardown on astro:before-swap as before. The renderTicks helper is duplicated from congruence-sss.ts for now — when Module 4 lands we'll factor it out into a shared module. Premature abstraction would force a circular import structure for one helper. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * feat(module-2): tam giác đồng dạng (lớp 8) with scale slider Page at /lop-8/tam-giac-dong-dang/. △ABC fixed on the left at scalene scale-72.8 / 83.2 / 93.4 sides. △A'B'C' is the runtime scaled image, controlled by a single range input k ∈ [0.5, 2] step 0.05. Live readout table shows all six side lengths and all three ratios. The killer moment: drag the slider, watch all 3 ratios stay numerically equal to each other (= 1/k). That equality IS the definition of similarity, made visible. Tick marks per Decision D3: 1/2/3 ticks color-paired (#D7263D / #1B998B / #F46036). Triangle 1 ticks rendered once on mount; triangle 2 ticks redrawn on every slider input. Hub: lớp 8 card flips to live status. All 3 grade cards now active — the autoplan 3-module hero set is complete. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> * chore: VERSION 0.0.4.0 + CHANGELOG + TODOS update v0.0.4.0 = scaffold + Module 3 (góc nội tiếp) + Module 1 (tam giác bằng nhau) + Module 2 (tam giác đồng dạng). All three MVP modules from autoplan now live. Move 2 P1 items to Completed (scale slider, ratio readout) and reduce Module 2 remaining items to P2 (free-drag mode) + P3 (numeric angle readouts). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com> --------- Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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0.0.4.0
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