Add docs site deployment instructions and update progress log

CLAUDE.md

@@ -307,6 +307,45 @@ The repo includes an extensive documentation collection (`Docs/`):
 - **BMW Communication Codes/** — 12 files with I-Bus message codes for E39/E46
 - **HackTheIBus/** — 21 PDFs covering individual module protocols (IKE, LCM, MFL, EWS, DSP, etc.)
 
+## Docs Site
+
+Starlight (Astro) documentation at **https://k-line.warehack.ing**. Source in `site/`.
+
+### Local Development
+
+```bash
+cd site
+npm run dev          # Astro dev server on port 4329
+```
+
+Local reverse proxy: `k-line.l.warehack.ing` (via local Caddy).
+
+### Remote Deployment
+
+```bash
+ssh -A warehack-ing@k-line.warehack.ing "cd ~/i-k-bus-board/site && git pull && make rebuild"
+```
+
+`make rebuild` stops the container, rebuilds the Docker image (Astro build → Caddy Alpine), and starts fresh. `make up` reuses the existing image (faster but won't pick up code changes).
+
+### Site Structure
+
+- **Stack:** Astro + Starlight → static HTML → Caddy (via `caddy-docker-proxy` labels)
+- **Config:** `site/.env` has `COMPOSE_PROJECT_NAME=k-line-docs` and `DOMAIN=k-line.warehack.ing`
+- **Public assets:** `site/public/spice/` contains SPICE netlists (.cir), waveform SVGs, and schematic PNG — served at `/spice/`
+- **Custom CSS:** `site/src/styles/custom.css` — waveform dark mode filter, schematic image styling
+
+### Makefile Targets
+
+| Target | Description |
+|--------|-------------|
+| `make up` | Start production (reuses existing image) |
+| `make rebuild` | Force rebuild and restart (picks up code changes) |
+| `make dev` | Start dev mode with hot reload |
+| `make down` | Stop containers |
+| `make logs` | Tail container logs |
+| `make clean` | Remove containers and images |
+
 ## Firmware
 
 PlatformIO project in `firmware/` — builds for ESP32, ESP32-C3, ESP32-S3, and OBD-II scanner.
@@ -411,6 +450,7 @@ pio device monitor         # serial monitor at 115200
 8. **Multi-protocol refactor (K-Line)** — split monolithic IbusEsp32 into KLineTransport (hardware) + IbusHandler (BMW FSM). Library renamed from IbusEsp32 to KLine. IbusEsp32 preserved as backward-compatible facade. Zero changes to existing BMW sniffer sketch.
 9. **OBD-II K-line support** — KLineObd2 handler with ISO 9141 5-baud slow init, ISO 14230 fast init (TiniPulse), request/response with half-duplex echo clearing. Obd2Pids.h with ~20 common PID decode helpers (SAE J1979). Scanner example sketch polls RPM, speed, coolant temp, throttle, voltage.
 10. **OBD-II code review + hardening** — Apollo code review identified 4 critical and 7 important issues. All fixed: proper UART pin detach (`pinMatrixOutDetach`), timeout underflow guards, checksum validation, echo verification, RX buffer flush after init, structural ISO 14230 frame parsing, negative response handling, TesterPresent keepalive, and session re-initialization.
+11. **Docs site with SPICE waveforms** — Starlight site deployed to `k-line.warehack.ing`. Circuit design page has inline schematic, tabbed waveform SVGs (RX/TX paths, 2000-point plots from mcltspice), and all 8 netlists as downloadable `.cir` files. Dark mode CSS filter for white-background SVGs.
 
 ## What's Next