human: code style

docs(readme): update readme with full feature documentation

feat(status-bar): display viewport scale as integer percentage

add readme

refactor(model): exclude Width/Height from serialization as they are runtime-measured values

fix(canvas): enforce 48px margin on left/top by shifting when minX/Y < Margin

refactor(canvas): compute size from node bounding box with margin, drop fixed minimum

feat(port): replace hover scale with color change, right-align output ports

fix(node-editor): subscribe PropertyChanged by using ViewModel setter in AddNodeControl

fix(minimap): sync viewport rect with actual canvas size

fix(minimap): set reasonable default size (200x150)

feat: 实现 Fluent Design 三栏布局界面

human: format xaml

human: format xaml

fix: 修复小地图无法显示的问题