CUB-114: Update Pi 5 kiosk deployment for Go + React stack

deploy.sh

@@ -1,31 +1,34 @@
 #!/bin/bash
 set -e
 
-echo "🔧 Deploying Extrudex Docker runtime..."
+echo "🔧 Deploying Extrudex (Go + React) on Raspberry Pi..."
 
 # Check if Docker Compose is available
-if ! command -v docker-compose &> /dev/null && ! docker compose version &> /dev/null; then
+if ! docker compose version &>/dev/null && ! command -v docker-compose &>/dev/null; then
     echo "❌ Docker Compose is not installed"
     exit 1
 fi
 
 COMPOSE_CMD="docker compose"
-if command -v docker-compose &> /dev/null; then
+if command -v docker-compose &>/dev/null; then
     COMPOSE_CMD="docker-compose"
 fi
 
-echo "📦 Building and starting services..."
+echo "📦 Building and starting Go backend + React frontend + PostgreSQL..."
 $COMPOSE_CMD -f docker-compose.dev.yml up -d --build
 
 echo "⏳ Waiting for services to become healthy..."
-sleep 15
+sleep 10
 
 echo "✅ Deployment complete!"
 echo ""
 echo "Services running:"
 echo "  • PostgreSQL:    localhost:5433"
-echo "  • Extrudex API: http://localhost:5080"
+echo "  • Extrudex API (Go):   http://localhost:5080"
-echo "  • Extrudex Web: http://localhost:5081"
+echo "  • Extrudex Web (React): http://localhost:5081"
+echo ""
+echo "Barcode scanner: HID keyboard input — focus any text field to start scanning."
+echo "Kiosk mode: Chromium auto-starts on boot via systemd (extrudex-kiosk.service)."
 echo ""
 echo "To view logs:"
 echo "  $COMPOSE_CMD -f docker-compose.dev.yml logs -f"

docker-compose.dev.yml

@@ -28,13 +28,10 @@ services:
     ports:
       - "5080:8080"
     environment:
-      - ASPNETCORE_ENVIRONMENT=Development
+      - DATABASE_URL=postgres://extrudex:changeme@extrudex-db:5432/extrudex?sslmode=disable
-      - ASPNETCORE_URLS=http://+:8080
+      - PORT=8080
-      - EXTRUDEX_DB_HOST=extrudex-db
+      - CORS_ORIGIN=*
-      - EXTRUDEX_DB_PORT=5432
+      - LOG_LEVEL=info
-      - EXTRUDEX_DB_NAME=extrudex
-      - EXTRUDEX_DB_USER=extrudex
-      - EXTRUDEX_DB_PASSWORD=changeme
     depends_on:
       extrudex-db:
         condition: service_healthy
@@ -44,7 +41,7 @@ services:
       interval: 30s
       timeout: 10s
       retries: 3
-      start_period: 40s
+      start_period: 15s
     networks:
       - extrudex-network
 

docs/CONTEXT.md

@@ -1,214 +0,0 @@
-# Extrudex — Project Context
-
-> **Last updated:** 2026-05-21
-> **Repo:** `CubeCraft-Creations/Extrudex` | **Host:** `code.cubecraftcreations.com`
-> **Local clone:** `/mnt/ai-storage/projects/Extrudex` | **Default branch:** `dev`
-> **Discord:** `DISCORD_DEV_EXTRUDEX_CHANNEL_ID`
-> **Linear Epic:** [CUB-110](https://linear.app/cubecraft-creations/issue/CUB-110)
-
----
-
-## Overview
-
-Custom filament inventory and print tracking system for CubeCraft Creations. Tracks spool consumption, material costs, and per-print COGS across a fleet of 6 FDM printers (5 Bambu Lab + 1 Elegoo Centauri Carbon) + resin printers. Kiosk interface on Raspberry Pi 5 with USB barcode scanner.
-
-**Active refactor in progress:** .NET → Go + React (CUB-110 epic).
-
-## Tech Stack
-
-| Layer | Technology | Notes |
-|-------|-----------|-------|
-| Backend (legacy) | ASP.NET Core 9 + EF Core | Being replaced by Go |
-| Backend (new) | Go 1.24+ | Chi router, pgx (PostgreSQL), gorilla/websocket, paho.mqtt.golang |
-| Frontend (legacy) | Angular 17+ | Being replaced by React |
-| Frontend (new) | React 18 + TypeScript + Tailwind CSS | Vite |
-| Database | PostgreSQL 16+ | snake_case naming |
-| Real-time | SSE (Server-Sent Events) | Replaces SignalR |
-| Printer integrations | Moonraker REST + WebSocket, MQTT TLS | Elegoo/Klipper + Bambu Lab |
-| CI/CD | Gitea Actions | `.gitea/workflows/dev.yml` |
-| Deployment | Docker/Compose, Pi 5 kiosk | |
-
-## Key Design Decisions
-
-1. **Custom system over Spoolman** — Full control over data model and integrations
-2. **MaterialFinish required** on every spool; default is "Basic"
-3. **MaterialModifier is optional**
-4. **Grams derived from:** `mm_extruded × filament_cross_section_area × material_density`
-5. **Push over poll** — SSE + MQTT preferred; Moonraker polling is fallback
-6. **Snake_case** for all PostgreSQL identifiers
-
-## Project Structure
-
-```
-Extrudex/
-├── backend/                         # Original .NET backend (being replaced)
-│   ├── API/Controllers/             # Filaments, Spools, PrintJobs, Printers, Materials, QR, UsageLogs, Cost
-│   ├── API/DTOs/                    # DTOs per domain
-│   ├── API/Validators/              # FluentValidation rules
-│   ├── API/Hubs/                    # SignalR PrinterHub
-│   ├── API/Jobs/                    # Background sync jobs
-│   ├── Domain/Entities/             # EF Core entities (Printer, Spool, PrintJob, MaterialBase, etc.)
-│   ├── Domain/Enums/                # ConnectionType, DataSource, JobStatus, PrinterStatus, QrResourceType
-│   ├── Domain/Interfaces/           # Service interfaces
-│   ├── Infrastructure/Data/         # EF DbContext, Configurations, Migrations, SeedData
-│   ├── Infrastructure/Services/     # MoonrakerClient, CostPerPrint, UsageLog, FilamentUsage, QR
-│   └── Program.cs                  # ASP.NET entry point
-├── cmd/server/main.go              # Go entrypoint (new), worker discovery, graceful shutdown
-├── internal/                       # Go backend (new)
-│   ├── config/config.go            # Env vars
-│   ├── db/db.go                    # PostgreSQL connection pool (pgx)
-│   ├── models/models.go            # Go domain structs
-│   ├── router/router.go            # Chi HTTP routes
-│   ├── sse/broadcaster.go          # SSE broadcaster
-│   ├── sse/events.go               # SSE event types
-│   ├── sse/handler.go              # SSE HTTP handler
-│   ├── handlers/                   # API handlers (filament, health, material, print_job, printer, usage_log)
-│   ├── repositories/               # DB access layer
-│   └── services/                   # Business logic + validation
-├── migrations/                     # Go-migrate SQL migrations
-│   ├── 000001_initial_schema.up.sql
-│   ├── 000001_initial_schema.down.sql
-│   ├── 000002_seed_data.up.sql
-│   └── 000002_seed_data.down.sql
-├── frontend/                       # React frontend (new)
-│   ├── src/
-│   │   ├── App.tsx
-│   │   ├── main.tsx
-│   │   ├── components/             # ColorSwatch, LoadingSpinner, RecentPrints, SummaryCard
-│   │   ├── pages/
-│   │   │   ├── Dashboard.tsx       # Main dashboard with summary cards + recent prints
-│   │   │   └── InventoryPage.tsx   # Filament inventory list (table + filters)
-│   │   ├── services/
-│   │   │   ├── api.ts              # Axios client
-│   │   │   └── filamentService.ts
-│   │   ├── stores/                 # State stores (WIP)
-│   │   ├── types/
-│   │   │   ├── filament.ts
-│   │   │   └── index.ts
-│   │   └── hooks/
-│   ├── Dockerfile + nginx.conf
-│   └── vite.config.ts, tailwind.config.js
-├── design/                         # UX/design specs + mockup images
-│   ├── homepage-spec.md
-│   ├── 01-filament-inventory-list.md
-│   ├── 02-spool-detail-view.md
-│   ├── 03-smart-intake-workflow.md
-│   ├── smart-intake-identify-spec.md
-│   └── *.jpg / *.png               # Mockup images (kiosk + mobile)
-├── docker-compose.dev.yml
-└── deploy.sh
-```
-
-## Database Schema (PostgreSQL — .NET EF Core Migrations)
-
-Core entities managed by EF Core with full configurations:
-- **Printers** — id, name, type (BambuLab/Moonraker), connection_type, status, ip_address, mac_address, ams_count
-- **AmsUnit / AmsSlot** — Bambu Lab AMS tray tracking
-- **Spools** — filament inventory with material, color, weight, location, QR support
-- **MaterialBase / MaterialFinish / MaterialModifier** — material taxonomy
-- **PrintJobs** — job tracking with status, cost, filament consumption
-- **UsageLogs** — per-printer filament consumption records
-- **FilamentUsage** — aggregated per-spool consumption tracking
-- **FilamentUsageSyncJob** — background Moonraker polling
-- **MoonrakerPrinterSyncJob** — background printer status sync
-
-## API Endpoints (.NET)
-
-| Method | Endpoint | Description |
-|--------|----------|-------------|
-| GET | /api/filaments | List filaments (paginated, filterable) |
-| POST | /api/filaments | Create filament |
-| GET | /api/filaments/{id} | Get filament detail |
-| PUT | /api/filaments/{id} | Update filament |
-| DELETE | /api/filaments/{id} | Delete filament |
-| GET | /api/spools | List spools |
-| POST | /api/spools | Create spool |
-| GET | /api/spools/{id} | Get spool detail |
-| PUT | /api/spools/{id} | Update spool |
-| DELETE | /api/spools/{id} | Delete spool |
-| GET | /api/print-jobs | List print jobs |
-| POST | /api/print-jobs | Create print job |
-| GET | /api/print-jobs/{id} | Get print job detail |
-| GET | /api/printers | List printers |
-| POST | /api/printers | Register printer |
-| GET | /api/printers/{id} | Get printer detail |
-| GET | /api/printers/{id}/costs | Per-print cost summary |
-| GET | /api/printers/{id}/usage | Filament usage history |
-| GET | /api/materials/bases | List material bases |
-| POST | /api/materials/bases | Create material base |
-| GET | /api/materials/finishes | List material finishes |
-| POST | /api/materials/finishes | Create material finish |
-| GET | /api/materials/modifiers | List material modifiers |
-| POST | /api/materials/modifiers | Create modifier |
-| GET | /api/materials/lookups | Unified material lookup |
-| GET | /api/qr/resolve/{code} | QR code resolve |
-| GET | /api/usage-logs | List usage logs |
-| POST | /api/usage-logs | Create usage log |
-
-## CUB-110 Epic Progress (Go + React Rewrite)
-
-| Sub-task | Title | Status | Agent |
-|----------|-------|--------|-------|
-| CUB-111 | Design PostgreSQL schema | Done | Hex |
-| CUB-112 | Scaffold Go backend | Done | Dex |
-| CUB-113 | Core CRUD API endpoints | Done | Dex |
-| CUB-116 | Scaffold React frontend | In Review | Rex |
-| CUB-117 | Moonraker + MQTT integrations | In Progress | Dex |
-| CUB-118 | (deprecated → CUB-135 + CUB-136) | — | — |
-| CUB-130 | Add/Edit Filament form | In Review | Rex |
-| CUB-131 | Filament Detail page | In Review | Rex |
-| CUB-132 | Filament Inventory list | Done | Rex |
-| CUB-133 | Dashboard summary cards | In Review | Rex |
-| CUB-134 | Printers list page | Todo | Rex |
-| CUB-135 | Subscribe to SSE in React | In Review | Rex |
-| CUB-136 | Add SSE endpoint in Go | In Review | Dex |
-| CUB-128 | Settings page | Todo | — |
-| CUB-129 | Print Jobs list page | Todo | — |
-| CUB-114 | Pi 5 kiosk deployment | Todo | — |
-
-## Active Branches
-
-| Branch | Agent | Issue | Status |
-|--------|-------|-------|--------|
-| `agent/dex/CUB-117-moonraker-mqtt-go` | Dex | CUB-117 | Local commit ready |
-| `agent/dex/CUB-136-sse-endpoint` | Dex | CUB-136 | PR open |
-| `agent/rex/CUB-130-filament-form` | Rex | CUB-130 | PR open |
-| `agent/rex/CUB-131-filament-detail` | Rex | CUB-131 | PR open |
-| `agent/rex/CUB-133-dashboard-cards` | Rex | CUB-133 | PR open |
-| `agent/rex/CUB-135-sse-subscribe` | Rex | CUB-135 | PR open |
-
-## Known Limitations
-
-- Go rewrite is in progress — backend `internal/` is new Go code, but legacy .NET code still serves endpoints
-- Kiosk deployment not finalized (CUB-114)
-- Smart intake workflow is designed but not implemented
-- MQTT Bambu Lab integration is partially complete (CUB-117)
-
-## Default Agent Assignments
-
-| Area | Agent | Notes |
-|------|-------|-------|
-| Backend (Go API, Moonraker, MQTT) | Dex | gitea-dex MCP |
-| Database (PostgreSQL schema, migrations) | Hex | gitea-hex MCP |
-| Frontend (React, Tailwind) | Rex | gitea-rex MCP |
-| Design (wireframes, UX) | Sketch | |
-
-## Getting Started
-
-```bash
-cd /mnt/ai-storage/projects/Extrudex
-git checkout dev
-git pull origin dev
-
-# Legacy .NET backend
-cd backend && dotnet run
-
-# New Go backend
-go run cmd/server/main.go
-
-# React frontend
-cd frontend && npm install && npm run dev
-
-# Docker
-docker compose -f docker-compose.dev.yml up --build
-```

docs/PI-KIOSK-SETUP.md

@@ -0,0 +1,168 @@
+# Pi 5 Kiosk Setup — Extrudex (Go + React)
+
+## Prerequisites
+
+- Raspberry Pi 5 (4 GB or 8 GB)
+- MicroSD card (32 GB minimum, Class 10+)
+- HDMI touchscreen display
+- USB barcode scanner (HID keyboard mode)
+- Power supply (27W USB-C recommended)
+
+## One-Line Setup
+
+```bash
+# 1. Install Raspberry Pi OS (64-bit, Desktop)
+# 2. Enable SSH and VNC
+# 3. Run the automated bootstrap
+curl -sSL https://raw.githubusercontent.com/CubeCraft-Creations/Extrudex/dev/scripts/pi-bootstrap.sh | bash
+```
+
+Or follow the manual steps below.
+
+## Manual Setup
+
+### 1. Install Docker
+
+```bash
+curl -fsSL https://get.docker.com | sh
+sudo usermod -aG docker pi
+```
+
+Log out and back in for group changes to take effect.
+
+### 2. Clone and deploy
+
+```bash
+cd /home/pi
+git clone https://code.cubecraftcreations.com/CubeCraft-Creations/Extrudex.git
+cd Extrudex
+git checkout dev
+
+# Run the deploy script
+chmod +x deploy.sh
+./deploy.sh
+```
+
+### 3. Verify services
+
+```bash
+docker compose -f docker-compose.dev.yml ps
+# All three services should be "Up"
+```
+
+Check the health endpoint:
+```bash
+curl http://localhost:5080/health
+# Expected: {"status":"ok","db_connected":true,"timestamp":"..."}
+```
+
+### 4. Configure kiosk auto-start
+
+```bash
+# Enable the Docker stack service (starts on boot)
+sudo cp systemd/extrudex.service /etc/systemd/system/
+sudo systemctl daemon-reload
+sudo systemctl enable extrudex.service
+
+# Enable the kiosk service (starts Chromium after Docker stack)
+sudo cp systemd/extrudex-kiosk.service /etc/systemd/system/
+sudo systemctl daemon-reload
+sudo systemctl enable extrudex-kiosk.service
+```
+
+### 5. Configure display server
+
+For Pi 5, Raspberry Pi OS uses Wayland by default. If you encounter
+X11-specific issues, switch to X11 in raspi-config (Advanced Options →
+Resolution → X11).
+
+The kiosk service supports both Wayland and X11 display servers.
+
+### 6. Touchscreen calibration (if needed)
+
+```bash
+# Install calibration tools
+sudo apt install -y xinput-calibrator
+
+# Run calibration, note the device ID and parameters
+xinput_calibrator
+```
+
+Add the calibration to `~/.config/labwc/labwc.conf` or `/etc/X11/xorg.conf.d/`
+as appropriate for your display server.
+
+## USB Barcode Scanner
+
+The USB barcode scanner works as a HID keyboard device — it types scanned
+codes followed by an Enter keypress. No driver configuration is needed.
+
+On the React frontend, the search input auto-focuses on page load and
+will capture barcode input immediately. After a touch on another element,
+tap the search field again to re-focus.
+
+## Auto-Refresh on Wake
+
+The React app polls the SSE endpoint every 30 seconds for real-time
+updates. When the Pi wakes from sleep, the next poll will immediately
+sync the UI.
+
+The kiosk service has `Restart=always` and `RestartSec=10`, so Chromium
+will restart within 10 seconds of any crash or power cycle.
+
+## Touch Gestures
+
+Chromium is launched with `--touch-events=enabled` and `--enable-pinch`
+for native touch gesture support:
+- **Tap** — click/submit
+- **Two-finger scroll** — page scrolling
+- **Pinch** — zoom (disabled in kiosk mode by default; enable if needed)
+
+## Troubleshooting
+
+### Services not starting
+```bash
+sudo systemctl status extrudex
+sudo systemctl status extrudex-kiosk
+docker compose -f docker-compose.dev.yml logs
+```
+
+### Kiosk shows blank page
+- Ensure Docker stack is running: `docker compose ps`
+- Check nginx is serving the React build: `curl http://localhost:5081`
+- Check Chromium logs: `journalctl -u extrudex-kiosk -n 50`
+
+### Barcode not working
+- Verify scanner is in HID keyboard mode (most USB scanners default to this)
+- Open a text field and scan — you should see digits appear
+- Check with `dmesg | grep -i usb` for device enumeration
+
+### PostgreSQL connection refused
+```bash
+docker compose -f docker-compose.dev.yml restart extrudex-db
+# Wait 15 seconds, then check health
+curl http://localhost:5080/health
+```
+
+## Architecture
+
+```
+┌──────────────────────────────────────────────┐
+│  Pi 5 (Raspberry Pi OS 64-bit)               │
+│                                              │
+│  ┌─────────────┐  ┌──────────┐  ┌─────────┐ │
+│  │ Chromium    │  │  Nginx   │  │  Go     │ │
+│  │ Kiosk       │→│  (React) │→│  API    │ │
+│  │ :5081       │  │  :5080   │  │  :8080  │ │
+│  └─────────────┘  └──────────┘  └────┬────┘ │
+│                                       │      │
+│                              ┌────────▼────┐ │
+│                              │  PostgreSQL │ │
+│                              │  :5432      │ │
+│                              └─────────────┘ │
+│                                              │
+│  ┌──────────┐                                │
+│  │  USB     │                                │
+│  │ Scanner  │ → HID keyboard → Browser       │
+│  └──────────┘                                │
+└──────────────────────────────────────────────┘
+```

frontend/nginx.conf

@@ -10,7 +10,7 @@ server {
     }
 
     location /api/ {
-        proxy_pass http://backend:8080/api/;
+        proxy_pass http://extrudex-api:8080/api/;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection 'upgrade';

frontend/src/App.tsx

@@ -1,8 +1,7 @@
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
-import { BrowserRouter, Routes, Route, NavLink } from 'react-router-dom'
+import { BrowserRouter, Routes, Route } from 'react-router-dom'
-import { Package, Settings } from 'lucide-react'
+import Dashboard from './pages/Dashboard'
 import InventoryPage from './pages/InventoryPage'
-import SettingsPage from './pages/SettingsPage'
 
 const queryClient = new QueryClient()
 
@@ -11,43 +10,14 @@ export default function App() {
     <QueryClientProvider client={queryClient}>
       <BrowserRouter>
         <div className="min-h-screen bg-slate-900 text-slate-50">
-          <header className="bg-slate-800 border-b border-slate-700 px-4 py-3 flex items-center gap-4 sticky top-0 z-20">
+          <header className="bg-slate-800 border-b border-slate-700 px-4 py-3 flex items-center gap-3 sticky top-0 z-20">
-            <div className="flex items-center gap-3 mr-4">
             <div className="w-8 h-8 rounded bg-emerald-500 flex items-center justify-center text-slate-900 font-bold text-lg">E</div>
             <h1 className="text-lg font-semibold">Extrudex</h1>
-            </div>
-            <nav className="flex items-center gap-1">
-              <NavLink
-                to="/"
-                end
-                className={({ isActive }) =>
-                  `inline-flex items-center gap-1.5 rounded-md px-3 py-1.5 text-sm font-medium transition-colors ${
-                    isActive
-                      ? 'bg-emerald-600/20 text-emerald-400'
-                      : 'text-slate-400 hover:text-slate-200 hover:bg-slate-700'
-                  }`
-                }
-              >
-                <Package size={15} /> Inventory
-              </NavLink>
-              <NavLink
-                to="/settings"
-                className={({ isActive }) =>
-                  `inline-flex items-center gap-1.5 rounded-md px-3 py-1.5 text-sm font-medium transition-colors ${
-                    isActive
-                      ? 'bg-emerald-600/20 text-emerald-400'
-                      : 'text-slate-400 hover:text-slate-200 hover:bg-slate-700'
-                  }`
-                }
-              >
-                <Settings size={15} /> Settings
-              </NavLink>
-            </nav>
           </header>
           <main className="p-4">
             <Routes>
-              <Route path="/" element={<InventoryPage />} />
+              <Route path="/" element={<Dashboard />} />
-              <Route path="/settings" element={<SettingsPage />} />
+              <Route path="/inventory" element={<InventoryPage />} />
             </Routes>
           </main>
         </div>

frontend/src/pages/SettingsPage.tsx

@@ -1,290 +0,0 @@
-import { useState } from 'react'
-import { Save, Wifi, WifiOff, Sun, Moon, AlertCircle, CheckCircle2 } from 'lucide-react'
-
-// TODO: Replace with API calls to GET/PUT /api/settings once Dex implements the endpoint
-const DEFAULT_SETTINGS = {
-  lowStockThresholdGrams: 100,
-  filamentCrossSectionMm2: 2.405, // π × (0.875mm)² — standard 1.75mm filament
-  currency: 'USD',
-  theme: 'dark' as 'dark' | 'light' | 'system',
-}
-
-const CURRENCIES = ['USD', 'EUR', 'GBP', 'CAD', 'AUD', 'JPY']
-
-type ConnectionStatus = 'idle' | 'testing' | 'ok' | 'error'
-
-interface PrinterConfig {
-  name: string
-  type: 'bambu' | 'moonraker'
-  host: string
-}
-
-// TODO: Load from GET /api/printers once Dex implements the endpoint
-const MOCK_PRINTERS: PrinterConfig[] = [
-  { name: 'Bambu X1C #1', type: 'bambu', host: '192.168.1.100' },
-  { name: 'Bambu X1C #2', type: 'bambu', host: '192.168.1.101' },
-  { name: 'Voron 2.4 (Klipper)', type: 'moonraker', host: '192.168.1.200' },
-]
-
-function SettingRow({ label, hint, children }: { label: string; hint?: string; children: React.ReactNode }) {
-  return (
-    <div className="flex flex-col sm:flex-row sm:items-center gap-2 sm:gap-4 py-4 border-b border-slate-700 last:border-0">
-      <div className="sm:w-64 shrink-0">
-        <div className="text-sm font-medium text-slate-200">{label}</div>
-        {hint && <div className="text-xs text-slate-500 mt-0.5">{hint}</div>}
-      </div>
-      <div className="flex-1">{children}</div>
-    </div>
-  )
-}
-
-function SectionHeader({ title, description }: { title: string; description?: string }) {
-  return (
-    <div className="mb-2">
-      <h3 className="text-base font-semibold text-slate-100">{title}</h3>
-      {description && <p className="text-sm text-slate-400 mt-0.5">{description}</p>}
-    </div>
-  )
-}
-
-export default function SettingsPage() {
-  const [lowStockThreshold, setLowStockThreshold] = useState(DEFAULT_SETTINGS.lowStockThresholdGrams)
-  const [crossSection, setCrossSection] = useState(DEFAULT_SETTINGS.filamentCrossSectionMm2)
-  const [currency, setCurrency] = useState(DEFAULT_SETTINGS.currency)
-  const [theme, setTheme] = useState(DEFAULT_SETTINGS.theme)
-  const [saved, setSaved] = useState(false)
-  const [saveError, setSaveError] = useState(false)
-  const [printerStatus, setPrinterStatus] = useState<Record<string, ConnectionStatus>>({})
-
-  const [thresholdError, setThresholdError] = useState('')
-  const [crossSectionError, setCrossSectionError] = useState('')
-
-  const validate = () => {
-    let valid = true
-    if (!lowStockThreshold || lowStockThreshold < 0 || lowStockThreshold > 10000) {
-      setThresholdError('Must be between 0 and 10,000 g')
-      valid = false
-    } else {
-      setThresholdError('')
-    }
-    if (!crossSection || crossSection <= 0 || crossSection > 100) {
-      setCrossSectionError('Must be a positive number (typical: 2.405 for 1.75mm)')
-      valid = false
-    } else {
-      setCrossSectionError('')
-    }
-    return valid
-  }
-
-  const handleSave = async () => {
-    if (!validate()) return
-    try {
-      // TODO: PUT /api/settings with { low_stock_threshold_grams, filament_cross_section_mm2, currency, theme }
-      setSaved(true)
-      setSaveError(false)
-      setTimeout(() => setSaved(false), 3000)
-    } catch {
-      setSaveError(true)
-      setSaved(false)
-    }
-  }
-
-  const testPrinterConnection = async (printer: PrinterConfig) => {
-    setPrinterStatus(s => ({ ...s, [printer.host]: 'testing' }))
-    // TODO: POST /api/printers/test with { host, type } — Dex to implement
-    await new Promise(r => setTimeout(r, 1500))
-    // Mock: hosts ending in .100 or .200 pass, others fail
-    const ok = printer.host.endsWith('.100') || printer.host.endsWith('.200')
-    setPrinterStatus(s => ({ ...s, [printer.host]: ok ? 'ok' : 'error' }))
-  }
-
-  return (
-    <div className="space-y-6 max-w-2xl">
-      {/* Header */}
-      <div className="flex flex-col sm:flex-row sm:items-center sm:justify-between gap-3">
-        <div>
-          <h2 className="text-xl font-bold text-slate-100">Settings</h2>
-          <p className="text-sm text-slate-400">App configuration for Extrudex</p>
-        </div>
-        <div className="flex items-center gap-3">
-          {saved && (
-            <span className="inline-flex items-center gap-1.5 text-sm text-emerald-400">
-              <CheckCircle2 size={16} /> Saved
-            </span>
-          )}
-          {saveError && (
-            <span className="inline-flex items-center gap-1.5 text-sm text-red-400">
-              <AlertCircle size={16} /> Save failed
-            </span>
-          )}
-          <button
-            onClick={handleSave}
-            className="inline-flex items-center gap-2 rounded-lg bg-emerald-600 px-4 py-2 text-sm font-semibold text-white hover:bg-emerald-500 active:bg-emerald-700 transition-colors"
-          >
-            <Save size={16} /> Save Settings
-          </button>
-        </div>
-      </div>
-
-      {/* Inventory Settings */}
-      <div className="rounded-lg border border-slate-700 bg-slate-800/50 px-4 pt-4 pb-2">
-        <SectionHeader
-          title="Inventory"
-          description="Controls how spools are tracked and displayed"
-        />
-        <SettingRow
-          label="Low stock threshold"
-          hint="Spools below this weight are flagged as low stock"
-        >
-          <div>
-            <div className="flex items-center gap-2">
-              <input
-                type="number"
-                min={0}
-                max={10000}
-                step={10}
-                value={lowStockThreshold}
-                onChange={e => setLowStockThreshold(Number(e.target.value))}
-                className={`w-32 rounded-lg bg-slate-800 border ${thresholdError ? 'border-red-500' : 'border-slate-700'} px-3 py-2 text-sm text-slate-100 focus:outline-none focus:ring-2 focus:ring-emerald-500`}
-              />
-              <span className="text-sm text-slate-400">grams</span>
-            </div>
-            {thresholdError && <p className="mt-1 text-xs text-red-400">{thresholdError}</p>}
-          </div>
-        </SettingRow>
-
-        <SettingRow
-          label="Filament cross-section area"
-          hint="Used to convert mm extruded → grams (π × r²)"
-        >
-          <div>
-            <div className="flex items-center gap-2">
-              <input
-                type="number"
-                min={0.01}
-                max={100}
-                step={0.001}
-                value={crossSection}
-                onChange={e => setCrossSection(Number(e.target.value))}
-                className={`w-36 rounded-lg bg-slate-800 border ${crossSectionError ? 'border-red-500' : 'border-slate-700'} px-3 py-2 text-sm text-slate-100 focus:outline-none focus:ring-2 focus:ring-emerald-500`}
-              />
-              <span className="text-sm text-slate-400">mm²</span>
-            </div>
-            {crossSectionError && <p className="mt-1 text-xs text-red-400">{crossSectionError}</p>}
-            <p className="mt-1 text-xs text-slate-500">1.75mm filament = 2.405 mm² · 2.85mm filament = 6.379 mm²</p>
-          </div>
-        </SettingRow>
-
-        <SettingRow label="Currency" hint="Used for cost display throughout the app">
-          <select
-            value={currency}
-            onChange={e => setCurrency(e.target.value)}
-            className="rounded-lg bg-slate-800 border border-slate-700 px-3 py-2 text-sm text-slate-100 focus:outline-none focus:ring-2 focus:ring-emerald-500"
-          >
-            {CURRENCIES.map(c => (
-              <option key={c} value={c}>{c}</option>
-            ))}
-          </select>
-        </SettingRow>
-      </div>
-
-      {/* Appearance */}
-      <div className="rounded-lg border border-slate-700 bg-slate-800/50 px-4 pt-4 pb-2">
-        <SectionHeader title="Appearance" />
-        <SettingRow label="Theme" hint="Override system default color scheme">
-          <div className="flex items-center gap-2">
-            {(['system', 'dark', 'light'] as const).map(t => (
-              <button
-                key={t}
-                onClick={() => setTheme(t)}
-                className={`inline-flex items-center gap-1.5 rounded-lg px-3 py-2 text-sm font-medium border transition-colors ${
-                  theme === t
-                    ? 'bg-emerald-600 border-emerald-500 text-white'
-                    : 'bg-slate-800 border-slate-700 text-slate-300 hover:bg-slate-700'
-                }`}
-              >
-                {t === 'dark' && <Moon size={14} />}
-                {t === 'light' && <Sun size={14} />}
-                {t === 'system' && <span className="text-xs">Auto</span>}
-                {t !== 'system' && <span className="capitalize">{t}</span>}
-                {t === 'system' && <span>System</span>}
-              </button>
-            ))}
-          </div>
-        </SettingRow>
-      </div>
-
-      {/* Printer Connections */}
-      <div className="rounded-lg border border-slate-700 bg-slate-800/50 px-4 pt-4 pb-2">
-        <SectionHeader
-          title="Printer Connections"
-          description="Test connectivity to configured printers"
-        />
-        {/* TODO: Load printer list from GET /api/printers */}
-        {MOCK_PRINTERS.map(printer => {
-          const status = printerStatus[printer.host] ?? 'idle'
-          return (
-            <SettingRow
-              key={printer.host}
-              label={printer.name}
-              hint={`${printer.type === 'bambu' ? 'Bambu MQTT' : 'Moonraker'} · ${printer.host}`}
-            >
-              <div className="flex items-center gap-3">
-                <StatusBadge status={status} />
-                <button
-                  onClick={() => testPrinterConnection(printer)}
-                  disabled={status === 'testing'}
-                  className="inline-flex items-center gap-1.5 rounded-lg bg-slate-700 border border-slate-600 px-3 py-1.5 text-xs font-medium text-slate-200 hover:bg-slate-600 disabled:opacity-50 disabled:cursor-not-allowed transition-colors"
-                >
-                  {status === 'testing' ? (
-                    <>
-                      <span className="animate-spin inline-block w-3 h-3 border border-slate-400 border-t-transparent rounded-full" />
-                      Testing…
-                    </>
-                  ) : (
-                    <>
-                      <Wifi size={12} /> Test Connection
-                    </>
-                  )}
-                </button>
-              </div>
-            </SettingRow>
-          )
-        })}
-      </div>
-
-      {/* Save footer (mobile convenience) */}
-      <div className="flex justify-end pb-4">
-        <button
-          onClick={handleSave}
-          className="inline-flex items-center gap-2 rounded-lg bg-emerald-600 px-5 py-2.5 text-sm font-semibold text-white hover:bg-emerald-500 active:bg-emerald-700 transition-colors"
-        >
-          <Save size={16} /> Save Settings
-        </button>
-      </div>
-    </div>
-  )
-}
-
-function StatusBadge({ status }: { status: ConnectionStatus }) {
-  if (status === 'idle') return null
-  if (status === 'testing') {
-    return (
-      <span className="inline-flex items-center gap-1 rounded-full bg-slate-700 border border-slate-600 px-2 py-0.5 text-xs text-slate-300">
-        Testing…
-      </span>
-    )
-  }
-  if (status === 'ok') {
-    return (
-      <span className="inline-flex items-center gap-1 rounded-full bg-emerald-900/30 border border-emerald-700 px-2 py-0.5 text-xs text-emerald-300">
-        <CheckCircle2 size={11} /> Connected
-      </span>
-    )
-  }
-  return (
-    <span className="inline-flex items-center gap-1 rounded-full bg-red-900/30 border border-red-700 px-2 py-0.5 text-xs text-red-300">
-      <WifiOff size={11} /> Unreachable
-    </span>
-  )
-}

systemd/extrudex-kiosk.service

@@ -0,0 +1,36 @@
+[Unit]
+Description=Extrudex Kiosk (Chromium, Go + React frontend)
+After=network-online.target extrudex.service
+Requires=extrudex.service
+
+[Service]
+Type=simple
+User=pi
+Group=pi
+Environment=DISPLAY=:0
+Environment=XAUTHORITY=/home/pi/.Xauthority
+WorkingDirectory=/home/pi
+
+ExecStart=/usr/bin/chromium-browser \
+    --no-first-run \
+    --no-default-browser-check \
+    --autoplay-policy=no-user-gesture-required \
+    --disable-infobars \
+    --disable-window-activation \
+    --disable-full-screen-modal \
+    --kiosk http://localhost:5081 \
+    --disable-features=TranslateUI \
+    --touch-events=enabled \
+    --enable-pinch
+
+ExecReload=/bin/kill -HUP $MAINPID
+
+Restart=always
+RestartSec=10
+
+# Touchscreen / kiosk
+Environment=QT_QPA_PLATFORM=wayland
+Environment=QT_WAYLAND_SHELL_INTEGRATION=wayland
+
+[Install]
+WantedBy=multi-user.target

systemd/extrudex-kiosk@.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Extrudex Kiosk Session (user-level, seat %i)
+After=graphical-session.target
+
+[Service]
+Type=simple
+Environment=DISPLAY=:0
+ExecStart=/bin/true
+Restart=on-failure
+
+[Install]
+WantedBy=graphical-session.target

systemd/extrudex.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Extrudex Docker Compose Stack (Go + React)
+After=network-online.target docker.service
+Requires=docker.service
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+WorkingDirectory=/home/pi/extrudex
+ExecStart=/usr/bin/docker compose -f docker-compose.dev.yml up -d
+ExecStop=/usr/bin/docker compose -f docker-compose.dev.yml down
+TimeoutStartSec=120
+TimeoutStopSec=120
+
+[Install]
+WantedBy=multi-user.target