Replace the disconnected grid fallback with a topology-aware renderer
that places BJTs/MOSFETs at center and draws connected wire paths using
SchemDraw push/pop for branching at junction points.
Layout pipeline: trace component chains from each device terminal,
classify paths by direction (supply/ground/input/output), draw with
proper Vdd/Ground terminators and junction dots at branch points.
Fallback cascade: loop → connected → grid. Supply sources shown as Vdd
rail symbols; signal sources drawn inline as SourceV in input paths.
Parse netlists into component graphs and render circuit diagrams via
SchemDraw. Two layout strategies: loop layout for simple 2-terminal
circuits (RC, RL, voltage divider) and labeled grid for complex
circuits with active devices (BJT amplifiers, MOSFET).
Backend: netlist parser, schematic engine, POST API endpoint.
Frontend: SchematicViewer with zoom/download, stacked cell layout
showing schematic + SPICE editor + waveform simultaneously.
Pre-create /app/notebooks/{user,examples} with correct ownership
before switching to the spicebook user. Without this, the app crashes
with PermissionError when it tries to create these directories at
runtime.
Switch from query-param routing (/notebook/?id=X) to Astro dynamic
routes (/notebook/rc-lowpass-filter). Add @astrojs/node adapter with
output: 'server' for on-demand route handling.
Fix formatEng/formatAxisValue crash on null values passed by uPlot
axis tick formatters. Add CORS origin for port 4322.
