Add German/English language toggle (i18n)

CLAUDE.md

@@ -0,0 +1,51 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Filament-Management is a local web application for tracking 3D printer filament/spool usage, built for Creality K2 Plus CFS (4x4 slot grid) and Klipper/Moonraker-based printers. It runs as a FastAPI backend with a vanilla JavaScript SPA frontend. The UI supports German and English via `static/i18n.js` (auto-detects browser language, persists choice in localStorage).
+
+## Development Commands
+
+```bash
+# Setup
+python3 -m venv venv
+source venv/bin/activate
+pip install -r requirements.txt
+
+# Run development server (with hot-reload)
+uvicorn main:app --reload --host 0.0.0.0 --port 8000
+
+# Health check
+curl http://localhost:8000/api/health
+```
+
+There are no automated tests, linting tools, or CI/CD pipelines configured.
+
+## Architecture
+
+**Backend:** Single-file FastAPI app (`main.py`, ~1500 lines) with Pydantic models in `models/schemas.py`. Data is persisted as JSON files in `data/` (state.json, config.json, profiles.json) — no database.
+
+**Frontend:** Vanilla JS SPA in `static/` (index.html, app.js, app.css, style.css). No build step, no framework — pure DOM manipulation.
+
+**Moonraker integration:** Optional async background polling loop that queries the printer's Moonraker API for print job status, filament usage, and CFS slot info. Includes Creality K2 Plus-specific object parsing (box.T1-T4, filament_rack).
+
+## Key Patterns
+
+- **Pydantic v1/v2 compatibility:** Helper functions `_model_dump()`, `_model_validate()`, `_req_dump()` abstract over version differences. Always use these instead of calling `.dict()` or `.model_dump()` directly.
+- **State migration:** `_migrate_state_dict()` handles legacy field names (e.g., `color` → `color_hex`, `vendor` → `manufacturer`) and older state.json formats.
+- **Two API tiers:** `/api/*` returns raw JSON; `/api/ui/*` wraps responses in `{"result": {...}}` for the frontend.
+- **Slot IDs:** Literal type `SlotId` = `"1A"` through `"4D"` (4 boxes × 4 colors, 16 total).
+- **Spool epochs:** Incrementing `spool_epoch` counter tracks spool changes per slot, enabling per-spool history filtering.
+- **History conventions:** `_hist_push()` prepends (newest-first); `_hist_upsert_by_src()` updates existing entries by source marker during live prints.
+- **Internal functions** are prefixed with `_` (e.g., `_http_get_json`, `_hist_push`).
+- **Filament calculation:** grams = density × π × (diameter/2)² × length, with material-specific density from profiles.json.
+
+## Spoolman Integration (Optional)
+
+Set `spoolman_url` in `data/config.json` to enable. This app acts as the only bridge between Spoolman and the printer (Moonraker's Spoolman plugin is not used). Spools are linked manually via the slot modal dropdown. On link, `remaining_weight` is imported from Spoolman. Consumption is synced back via `PUT /api/v1/spool/{id}/use` (fire-and-forget) when prints finalize or manual allocations are made. Roll changes auto-unlink the Spoolman spool. All Spoolman calls are best-effort and never block local tracking.
+
+## Production Deployment
+
+Installs to `/opt/filament-management/` as a systemd service. See `install.sh`, `update.sh`, `uninstall.sh`, and `filament-management.service.example`.

install.sh

@@ -3,7 +3,7 @@ set -euo pipefail
 
 APP_DIR="/opt/filament-management"
 SERVICE_NAME="filament-management"
-REPO_URL="https://github.com/jkef80/Filament-Management.git"
+REPO_URL="https://github.com/koen01/Filament-Management.git"
 
 if [[ ${EUID} -ne 0 ]]; then
   echo "Please run with sudo"
@@ -36,6 +36,7 @@ MOON_PORT=$(ask "Moonraker Port" "7125")
 POLL=$(ask "Poll interval (sec)" "5")
 DIAM=$(ask "Filament diameter (mm)" "1.75")
 AUTOSYNC=$(ask "CFS Autosync? (y/N)" "N")
+SPOOLMAN_URL=$(ask "Spoolman URL (optional, e.g. http://host:7912)" "")
 
 AUTOSYNC_BOOL=false
 if [[ "$AUTOSYNC" =~ ^[Yy]$ ]]; then AUTOSYNC_BOOL=true; fi
@@ -76,7 +77,8 @@ cat > "$APP_DIR/data/config.json" <<CFG
   "moonraker_url": "http://${MOON_HOST}:${MOON_PORT}",
   "poll_interval_sec": ${POLL},
   "filament_diameter_mm": ${DIAM},
-  "cfs_autosync": ${AUTOSYNC_BOOL}
+  "cfs_autosync": ${AUTOSYNC_BOOL},
+  "spoolman_url": "${SPOOLMAN_URL}"
 }
 CFG