feat: field-sync-gui MVP — Wails GUI ingest SD→local+S3 (4 slots //)

2026-04-27 22:10:15 +00:00
commit dcaf5ac020
46 changed files with 5135 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,9 @@
+build/bin
+node_modules
+frontend/dist
+
+# build artifacts
+build/bin/
+node_modules/
+frontend/dist/
+.env
--- a/README.md
+++ b/README.md
@@ -0,0 +1,163 @@
+# field-sync-gui
+
+GUI desktop sur-mesure Cosma terrain : ingest cartes SD GoPro → disque local + AWS S3.
+
+Stack : **Wails v2** (Go backend) + **Svelte+TS+Tailwind** (frontend) + **s5cmd** (uploads S3 parallèles).
+
+## Pourquoi ?
+
+Workflow terrain actuel : SD → disque dur (1 par 1) → script rclone Windows → S3. Lent, série, peu de visibilité.
+
+`field-sync-gui` ingère **4 cartes SD en parallèle**, copie locale + sync S3 simultanés, progress live par slot, manifeste JSON par session, retry auto, dry-run dispo. Single binary par OS, 0 install.
+
+## Binaries pré-buildés (Linux + Windows)
+
+Build host : `192.168.0.91` (Proxmox VM `openclaw`).
+
+```
+build/bin/field-sync-gui          # Linux x86_64 (~7.7 MB)
+build/bin/field-sync-gui.exe      # Windows x86_64 (~11 MB)
+```
+
+macOS : non cross-compilable depuis Linux sans osxcross. À builder sur un Mac (cf. section Build).
+
+## Install runtime
+
+### Pré-requis user (toutes OS)
+- **s5cmd** dans le PATH — uploads S3 (10× plus rapide que aws-cli) — https://github.com/peak/s5cmd/releases
+- **AWS credentials** : profile `cosma` (ou autre) configuré dans `~/.aws/credentials` ou `aws configure --profile cosma`
+
+### Linux
+```bash
+chmod +x field-sync-gui
+./field-sync-gui
+```
+Pré-requis système : `libwebkit2gtk-4.1-0` (Ubuntu 24.04) ou `libwebkit2gtk-4.0-37` (Ubuntu ≤22).
+
+### Windows
+Double-clic `field-sync-gui.exe`. WebView2 Runtime requis (préinstallé Win11, Edge récent).
+
+### macOS
+Build local nécessaire — voir section Build.
+
+## Configuration
+
+Au premier lancement, l'app charge `.env` depuis le répertoire courant ou variables d'env :
+
+```env
+FIELD_SYNC_S3_BUCKET=cosma-field-data
+FIELD_SYNC_LOCAL_DEST=/data/cosma/sessions
+AWS_PROFILE=cosma
+FIELD_SYNC_CONCURRENCY=4
+```
+
+`FIELD_SYNC_CONCURRENCY` = nombre de workers parallèles (défaut 4 = 1 par slot).
+
+## Usage
+
+1. Insère jusqu'à 4 cartes SD GoPro (USB readers ou slot natif)
+2. Lance l'app → **↻ Rescan** détecte les cartes (auto-rescan toutes les 3s)
+3. Vérifie les slots A/B/C/D affichés
+4. (Optionnel) Coche **Dry-run** pour simuler sans toucher S3
+5. Clique **▶ START INGEST** → 4 workers parallèles, progress live
+6. À la fin → manifeste `<localDest>/<session-id>/manifest.json` (sha256, S3 URI, status par fichier)
+7. **✕ Cancel** pour interrompre proprement
+
+## Format manifeste
+
+```json
+{
+  "sessionID": "cosma-20260427-2200",
+  "entries": [
+    {
+      "source": "/media/sd-A/DCIM/100GOPRO/GX010001.MP4",
+      "localDest": "/data/cosma/sessions/cosma-20260427-2200/A/DCIM/100GOPRO/GX010001.MP4",
+      "s3Path": "s3://cosma-field-data/cosma-20260427-2200/A/DCIM/100GOPRO/GX010001.MP4",
+      "sha256": "abc123...",
+      "bytes": 524288000,
+      "status": "done"
+    }
+  ]
+}
+```
+
+Statuts : `local` | `s3` | `done` | `error` | `dry-run`.
+
+## Build (depuis sources)
+
+### Pré-requis
+- Go 1.22+
+- Node 18+
+- Wails CLI : `go install github.com/wailsapp/wails/v2/cmd/wails@latest`
+- Linux : `apt install libgtk-3-dev libwebkit2gtk-4.1-dev`
+- Windows cross-compile depuis Linux : `apt install gcc-mingw-w64-x86-64`
+- macOS : build sur un Mac (Xcode CLI tools)
+
+### Commandes
+
+```bash
+# Linux natif
+wails build -tags webkit2_41 -platform linux/amd64
+
+# Windows depuis Linux
+CC=x86_64-w64-mingw32-gcc CXX=x86_64-w64-mingw32-g++ wails build -platform windows/amd64
+
+# macOS (sur Mac)
+wails build -platform darwin/amd64        # Intel
+wails build -platform darwin/arm64        # Apple Silicon
+wails build -platform darwin/universal    # Universal binary
+```
+
+Sortie dans `build/bin/`.
+
+### Dev mode (hot reload)
+```bash
+wails dev -tags webkit2_41
+```
+
+## Architecture
+
+```
+field-sync-gui/
+├── app.go                    # orchestrateur Wails (méthodes exposées au frontend)
+├── main.go                   # entrypoint Wails
+├── internal/
+│   ├── config/               # .env loader
+│   ├── detect/               # gopsutil → SD cards detection
+│   ├── copier/               # CopyLocal (sha256 streaming) + CopyS3 (s5cmd) + Pool workers
+│   └── manifest/             # JSON atomic writer (lock + tmp+rename)
+├── frontend/
+│   ├── src/
+│   │   ├── App.svelte        # UI 4 slots + boutons + progress bars
+│   │   ├── style.css         # Tailwind directives
+│   │   └── main.ts
+│   ├── tailwind.config.js
+│   └── postcss.config.js
+└── build/bin/                # binaires output
+```
+
+## Méthodes Wails exposées
+
+| Méthode | Signature | Rôle |
+|---|---|---|
+| `ScanCards()` | `[]SDCard` | Détecte cartes SD (4 max) |
+| `StartIngest(slots)` | `[]SlotPayload → error` | Lance ingest 4 workers |
+| `CancelIngest()` | `error` | Cancel ctx en cours |
+| `GetSnapshot()` | `Snapshot` | État courant (slots + config) |
+| `SetDryRun(b)` | `bool` | Toggle dry-run |
+| `LoadConfig()` | `config.Config` | Recharge `.env` |
+
+Events Wails : `slot-update` (par worker), `session-done` (fin de session).
+
+## Limitations connues / TODO
+
+- macOS : pas de build cross-OS depuis Linux (osxcross trop lourd, build sur Mac requis)
+- Windows : code-signing absent (warning SmartScreen au premier run)
+- Pas de mode resume après crash (TODO : reprendre manifeste partiel)
+- Pas de vérif ETag S3 post-upload (TODO : compare sha256 ↔ ETag pour fichiers <5GB)
+- Pas de hook Discord/Webhook fin de session (TODO)
+- Détection SD : heuristique (paths `/media/`, `/Volumes/`, opt `removable`) — peut nécessiter ajustement par OS
+
+## Licence
+
+Internal Cosma — non distribué publiquement.
--- a/app.go
+++ b/app.go
@@ -0,0 +1,313 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"sync"
+	"time"
+
+	"field-sync-gui/internal/config"
+	"field-sync-gui/internal/copier"
+	"field-sync-gui/internal/detect"
+	"field-sync-gui/internal/manifest"
+
+	"github.com/wailsapp/wails/v2/pkg/runtime"
+)
+
+// SlotState holds per-slot progress
+type SlotState struct {
+	Slot       string  `json:"slot"`
+	Mountpoint string  `json:"mountpoint"`
+	Label      string  `json:"label"`
+	Status     string  `json:"status"` // idle|scanning|copying|uploading|done|error
+	FilesTotal int     `json:"filesTotal"`
+	FilesDone  int     `json:"filesDone"`
+	BytesTotal int64   `json:"bytesTotal"`
+	BytesDone  int64   `json:"bytesDone"`
+	SpeedMBs   float64 `json:"speedMBs"`
+	Error      string  `json:"error,omitempty"`
+}
+
+// Snapshot is the full UI state
+type Snapshot struct {
+	SessionID string       `json:"sessionID"`
+	Slots     [4]SlotState `json:"slots"`
+	Running   bool         `json:"running"`
+	DryRun    bool         `json:"dryRun"`
+	Config    config.Config `json:"config"`
+}
+
+// SlotPayload is the per-slot input from the frontend
+type SlotPayload struct {
+	Slot       string `json:"slot"`
+	Mountpoint string `json:"mountpoint"`
+}
+
+// App is the Wails application struct
+type App struct {
+	ctx       context.Context
+	cfg       config.Config
+	sessionID string
+	slots     [4]SlotState
+	mu        sync.RWMutex
+	cancel    context.CancelFunc
+	dryRun    bool
+	manifest  *manifest.Manifest
+	running   bool
+}
+
+// NewApp creates a new App
+func NewApp() *App {
+	return &App{}
+}
+
+// startup is called by Wails when the app starts
+func (a *App) startup(ctx context.Context) {
+	a.ctx = ctx
+	a.cfg = config.Load(".env")
+	for i, letter := range []string{"A", "B", "C", "D"} {
+		a.slots[i] = SlotState{Slot: letter, Status: "idle"}
+	}
+}
+
+// ScanCards returns up to 4 detected SD cards
+func (a *App) ScanCards() []detect.SDCard {
+	cards := detect.Detect()
+	if len(cards) > 4 {
+		cards = cards[:4]
+	}
+	return cards
+}
+
+// LoadConfig returns current config
+func (a *App) LoadConfig() config.Config {
+	return a.cfg
+}
+
+// SetDryRun toggles dry-run mode
+func (a *App) SetDryRun(b bool) {
+	a.mu.Lock()
+	a.dryRun = b
+	a.mu.Unlock()
+}
+
+// GetSnapshot returns current state
+func (a *App) GetSnapshot() Snapshot {
+	a.mu.RLock()
+	defer a.mu.RUnlock()
+	return Snapshot{
+		SessionID: a.sessionID,
+		Slots:     a.slots,
+		Running:   a.running,
+		DryRun:    a.dryRun,
+		Config:    a.cfg,
+	}
+}
+
+// CancelIngest cancels a running ingest
+func (a *App) CancelIngest() error {
+	a.mu.Lock()
+	defer a.mu.Unlock()
+	if a.cancel != nil {
+		a.cancel()
+	}
+	return nil
+}
+
+// StartIngest launches the ingest pipeline in a goroutine
+func (a *App) StartIngest(slotConfigs []SlotPayload) error {
+	a.mu.Lock()
+	if a.running {
+		a.mu.Unlock()
+		return fmt.Errorf("ingest already running")
+	}
+
+	// Generate session ID
+	now := time.Now()
+	a.sessionID = fmt.Sprintf("cosma-%s", now.Format("20060102-1504"))
+	a.manifest = manifest.New(a.sessionID)
+	a.running = true
+
+	ctx, cancel := context.WithCancel(a.ctx)
+	a.cancel = cancel
+
+	dryRun := a.dryRun
+	cfg := a.cfg
+	sessionID := a.sessionID
+
+	// Reset slots
+	for i := range a.slots {
+		a.slots[i].Status = "idle"
+		a.slots[i].FilesTotal = 0
+		a.slots[i].FilesDone = 0
+		a.slots[i].BytesTotal = 0
+		a.slots[i].BytesDone = 0
+		a.slots[i].SpeedMBs = 0
+		a.slots[i].Error = ""
+	}
+	a.mu.Unlock()
+
+	go func() {
+		defer func() {
+			a.mu.Lock()
+			a.running = false
+			a.cancel = nil
+			a.mu.Unlock()
+			runtime.EventsEmit(a.ctx, "session-done", a.GetSnapshot())
+		}()
+
+		// Map slot letter → index
+		slotIndex := map[string]int{"A": 0, "B": 1, "C": 2, "D": 3}
+
+		// Build all jobs per slot
+		type slotJobs struct {
+			idx  int
+			cfg  SlotPayload
+			jobs []copier.FileJob
+		}
+
+		var allSlots []slotJobs
+		for _, sc := range slotConfigs {
+			idx, ok := slotIndex[sc.Slot]
+			if !ok {
+				continue
+			}
+
+			a.mu.Lock()
+			a.slots[idx].Slot = sc.Slot
+			a.slots[idx].Mountpoint = sc.Mountpoint
+			a.slots[idx].Label = filepath.Base(sc.Mountpoint)
+			a.slots[idx].Status = "scanning"
+			a.mu.Unlock()
+			runtime.EventsEmit(a.ctx, "slot-update", a.slots[idx])
+
+			var jobs []copier.FileJob
+			var bytesTotal int64
+			_ = filepath.Walk(sc.Mountpoint, func(path string, info os.FileInfo, err error) error {
+				if err != nil || info.IsDir() {
+					return nil
+				}
+				if !detect.HasMediaExtension(path) {
+					return nil
+				}
+				rel, _ := filepath.Rel(sc.Mountpoint, path)
+				label := filepath.Base(sc.Mountpoint)
+				localDest := filepath.Join(cfg.LocalDest, sessionID, label, rel)
+				s3Key := fmt.Sprintf("%s/%s/%s", sessionID, label, rel)
+				jobs = append(jobs, copier.FileJob{
+					Source:     path,
+					LocalDest:  localDest,
+					S3Bucket:   cfg.S3Bucket,
+					S3Key:      s3Key,
+					AWSProfile: cfg.AWSProfile,
+				})
+				bytesTotal += info.Size()
+				return nil
+			})
+
+			a.mu.Lock()
+			a.slots[idx].FilesTotal = len(jobs)
+			a.slots[idx].BytesTotal = bytesTotal
+			a.slots[idx].Status = "copying"
+			a.mu.Unlock()
+			runtime.EventsEmit(a.ctx, "slot-update", a.slots[idx])
+
+			allSlots = append(allSlots, slotJobs{idx: idx, cfg: sc, jobs: jobs})
+		}
+
+		// Dry-run: mark all done immediately
+		if dryRun {
+			for _, sl := range allSlots {
+				for _, job := range sl.jobs {
+					a.manifest.Append(manifest.Entry{
+						Source:    job.Source,
+						LocalDest: job.LocalDest,
+						S3Path:    fmt.Sprintf("s3://%s/%s", job.S3Bucket, job.S3Key),
+						Status:    "dry-run",
+					})
+				}
+				a.mu.Lock()
+				a.slots[sl.idx].FilesDone = a.slots[sl.idx].FilesTotal
+				a.slots[sl.idx].BytesDone = a.slots[sl.idx].BytesTotal
+				a.slots[sl.idx].Status = "done"
+				snap := a.slots[sl.idx]
+				a.mu.Unlock()
+				runtime.EventsEmit(a.ctx, "slot-update", snap)
+			}
+			_ = a.manifest.Save(filepath.Join(cfg.LocalDest, sessionID, "manifest.json"))
+			return
+		}
+
+		// Real copy: flatten all jobs into channel, track per-slot
+		jobCh := make(chan copier.FileJob, 64)
+
+		// Build slot index from job source
+		jobSlot := make(map[string]int)
+		for _, sl := range allSlots {
+			for _, j := range sl.jobs {
+				jobSlot[j.Source] = sl.idx
+			}
+		}
+
+		mani := a.manifest
+
+		pool := &copier.Pool{
+			Workers: cfg.Concurrency,
+			OnResult: func(res copier.FileResult) {
+				idx, ok := jobSlot[res.Job.Source]
+				if !ok {
+					return
+				}
+				status := "done"
+				errStr := ""
+				if res.Error != nil {
+					status = "error"
+					errStr = res.Error.Error()
+				}
+				mani.Append(manifest.Entry{
+					Source:    res.Job.Source,
+					LocalDest: res.Job.LocalDest,
+					S3Path:    fmt.Sprintf("s3://%s/%s", res.Job.S3Bucket, res.Job.S3Key),
+					SHA256:    res.SHA256,
+					Bytes:     res.Bytes,
+					Status:    status,
+					Error:     errStr,
+				})
+
+				a.mu.Lock()
+				a.slots[idx].FilesDone++
+				a.slots[idx].BytesDone += res.Bytes
+				if res.Error != nil {
+					a.slots[idx].Error = errStr
+					a.slots[idx].Status = "error"
+				} else if a.slots[idx].FilesDone >= a.slots[idx].FilesTotal {
+					a.slots[idx].Status = "done"
+				}
+				snap := a.slots[idx]
+				a.mu.Unlock()
+				runtime.EventsEmit(a.ctx, "slot-update", snap)
+			},
+		}
+
+		go func() {
+			for _, sl := range allSlots {
+				for _, j := range sl.jobs {
+					select {
+					case <-ctx.Done():
+						close(jobCh)
+						return
+					case jobCh <- j:
+					}
+				}
+			}
+			close(jobCh)
+		}()
+
+		pool.Run(ctx, jobCh)
+		_ = mani.Save(filepath.Join(cfg.LocalDest, sessionID, "manifest.json"))
+	}()
+
+	return nil
+}
--- a/build/README.md
+++ b/build/README.md
@@ -0,0 +1,35 @@
+# Build Directory
+
+The build directory is used to house all the build files and assets for your application. 
+
+The structure is:
+
+* bin - Output directory
+* darwin - macOS specific files
+* windows - Windows specific files
+
+## Mac
+
+The `darwin` directory holds files specific to Mac builds.
+These may be customised and used as part of the build. To return these files to the default state, simply delete them
+and
+build with `wails build`.
+
+The directory contains the following files:
+
+- `Info.plist` - the main plist file used for Mac builds. It is used when building using `wails build`.
+- `Info.dev.plist` - same as the main plist file but used when building using `wails dev`.
+
+## Windows
+
+The `windows` directory contains the manifest and rc files used when building with `wails build`.
+These may be customised for your application. To return these files to the default state, simply delete them and
+build with `wails build`.
+
+- `icon.ico` - The icon used for the application. This is used when building using `wails build`. If you wish to
+  use a different icon, simply replace this file with your own. If it is missing, a new `icon.ico` file
+  will be created using the `appicon.png` file in the build directory.
+- `installer/*` - The files used to create the Windows installer. These are used when building using `wails build`.
+- `info.json` - Application details used for Windows builds. The data here will be used by the Windows installer,
+  as well as the application itself (right click the exe -> properties -> details)
+- `wails.exe.manifest` - The main application manifest file.
--- a/build/appicon.png
+++ b/build/appicon.png
--- a/build/darwin/Info.dev.plist
+++ b/build/darwin/Info.dev.plist
@@ -0,0 +1,68 @@
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+    <dict>
+        <key>CFBundlePackageType</key>
+        <string>APPL</string>
+        <key>CFBundleName</key>
+        <string>{{.Info.ProductName}}</string>
+        <key>CFBundleExecutable</key>
+        <string>{{.OutputFilename}}</string>
+        <key>CFBundleIdentifier</key>
+        <string>com.wails.{{.Name}}</string>
+        <key>CFBundleVersion</key>
+        <string>{{.Info.ProductVersion}}</string>
+        <key>CFBundleGetInfoString</key>
+        <string>{{.Info.Comments}}</string>
+        <key>CFBundleShortVersionString</key>
+        <string>{{.Info.ProductVersion}}</string>
+        <key>CFBundleIconFile</key>
+        <string>iconfile</string>
+        <key>LSMinimumSystemVersion</key>
+        <string>10.13.0</string>
+        <key>NSHighResolutionCapable</key>
+        <string>true</string>
+        <key>NSHumanReadableCopyright</key>
+        <string>{{.Info.Copyright}}</string>
+        {{if .Info.FileAssociations}}
+        <key>CFBundleDocumentTypes</key>
+        <array>
+          {{range .Info.FileAssociations}}
+          <dict>
+            <key>CFBundleTypeExtensions</key>
+            <array>
+              <string>{{.Ext}}</string>
+            </array>
+            <key>CFBundleTypeName</key>
+            <string>{{.Name}}</string>
+            <key>CFBundleTypeRole</key>
+            <string>{{.Role}}</string>
+            <key>CFBundleTypeIconFile</key>
+            <string>{{.IconName}}</string>
+          </dict>
+          {{end}}
+        </array>
+        {{end}}
+        {{if .Info.Protocols}}
+        <key>CFBundleURLTypes</key>
+        <array>
+          {{range .Info.Protocols}}
+            <dict>
+                <key>CFBundleURLName</key>
+                <string>com.wails.{{.Scheme}}</string>
+                <key>CFBundleURLSchemes</key>
+                <array>
+                    <string>{{.Scheme}}</string>
+                </array>
+                <key>CFBundleTypeRole</key>
+                <string>{{.Role}}</string>
+            </dict>
+          {{end}}
+        </array>
+        {{end}}
+        <key>NSAppTransportSecurity</key>
+        <dict>
+            <key>NSAllowsLocalNetworking</key>
+            <true/>
+        </dict>
+    </dict>
+</plist>
--- a/build/darwin/Info.plist
+++ b/build/darwin/Info.plist
@@ -0,0 +1,63 @@
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+    <dict>
+        <key>CFBundlePackageType</key>
+        <string>APPL</string>
+        <key>CFBundleName</key>
+        <string>{{.Info.ProductName}}</string>
+        <key>CFBundleExecutable</key>
+        <string>{{.OutputFilename}}</string>
+        <key>CFBundleIdentifier</key>
+        <string>com.wails.{{.Name}}</string>
+        <key>CFBundleVersion</key>
+        <string>{{.Info.ProductVersion}}</string>
+        <key>CFBundleGetInfoString</key>
+        <string>{{.Info.Comments}}</string>
+        <key>CFBundleShortVersionString</key>
+        <string>{{.Info.ProductVersion}}</string>
+        <key>CFBundleIconFile</key>
+        <string>iconfile</string>
+        <key>LSMinimumSystemVersion</key>
+        <string>10.13.0</string>
+        <key>NSHighResolutionCapable</key>
+        <string>true</string>
+        <key>NSHumanReadableCopyright</key>
+        <string>{{.Info.Copyright}}</string>
+        {{if .Info.FileAssociations}}
+        <key>CFBundleDocumentTypes</key>
+        <array>
+          {{range .Info.FileAssociations}}
+          <dict>
+            <key>CFBundleTypeExtensions</key>
+            <array>
+              <string>{{.Ext}}</string>
+            </array>
+            <key>CFBundleTypeName</key>
+            <string>{{.Name}}</string>
+            <key>CFBundleTypeRole</key>
+            <string>{{.Role}}</string>
+            <key>CFBundleTypeIconFile</key>
+            <string>{{.IconName}}</string>
+          </dict>
+          {{end}}
+        </array>
+        {{end}}
+        {{if .Info.Protocols}}
+        <key>CFBundleURLTypes</key>
+        <array>
+          {{range .Info.Protocols}}
+            <dict>
+                <key>CFBundleURLName</key>
+                <string>com.wails.{{.Scheme}}</string>
+                <key>CFBundleURLSchemes</key>
+                <array>
+                    <string>{{.Scheme}}</string>
+                </array>
+                <key>CFBundleTypeRole</key>
+                <string>{{.Role}}</string>
+            </dict>
+          {{end}}
+        </array>
+        {{end}}
+    </dict>
+</plist>
--- a/build/windows/icon.ico
+++ b/build/windows/icon.ico
--- a/build/windows/info.json
+++ b/build/windows/info.json
@@ -0,0 +1,15 @@
+{
+	"fixed": {
+		"file_version": "{{.Info.ProductVersion}}"
+	},
+	"info": {
+		"0000": {
+			"ProductVersion": "{{.Info.ProductVersion}}",
+			"CompanyName": "{{.Info.CompanyName}}",
+			"FileDescription": "{{.Info.ProductName}}",
+			"LegalCopyright": "{{.Info.Copyright}}",
+			"ProductName": "{{.Info.ProductName}}",
+			"Comments": "{{.Info.Comments}}"
+		}
+	}
+}
--- a/build/windows/installer/project.nsi
+++ b/build/windows/installer/project.nsi
@@ -0,0 +1,114 @@
+Unicode true
+
+####
+## Please note: Template replacements don't work in this file. They are provided with default defines like
+## mentioned underneath.
+## If the keyword is not defined, "wails_tools.nsh" will populate them with the values from ProjectInfo.
+## If they are defined here, "wails_tools.nsh" will not touch them. This allows to use this project.nsi manually
+## from outside of Wails for debugging and development of the installer.
+##
+## For development first make a wails nsis build to populate the "wails_tools.nsh":
+## > wails build --target windows/amd64 --nsis
+## Then you can call makensis on this file with specifying the path to your binary:
+## For a AMD64 only installer:
+## > makensis -DARG_WAILS_AMD64_BINARY=..\..\bin\app.exe
+## For a ARM64 only installer:
+## > makensis -DARG_WAILS_ARM64_BINARY=..\..\bin\app.exe
+## For a installer with both architectures:
+## > makensis -DARG_WAILS_AMD64_BINARY=..\..\bin\app-amd64.exe -DARG_WAILS_ARM64_BINARY=..\..\bin\app-arm64.exe
+####
+## The following information is taken from the ProjectInfo file, but they can be overwritten here.
+####
+## !define INFO_PROJECTNAME    "MyProject" # Default "{{.Name}}"
+## !define INFO_COMPANYNAME    "MyCompany" # Default "{{.Info.CompanyName}}"
+## !define INFO_PRODUCTNAME    "MyProduct" # Default "{{.Info.ProductName}}"
+## !define INFO_PRODUCTVERSION "1.0.0"     # Default "{{.Info.ProductVersion}}"
+## !define INFO_COPYRIGHT      "Copyright" # Default "{{.Info.Copyright}}"
+###
+## !define PRODUCT_EXECUTABLE  "Application.exe"      # Default "${INFO_PROJECTNAME}.exe"
+## !define UNINST_KEY_NAME     "UninstKeyInRegistry"  # Default "${INFO_COMPANYNAME}${INFO_PRODUCTNAME}"
+####
+## !define REQUEST_EXECUTION_LEVEL "admin"            # Default "admin"  see also https://nsis.sourceforge.io/Docs/Chapter4.html
+####
+## Include the wails tools
+####
+!include "wails_tools.nsh"
+
+# The version information for this two must consist of 4 parts
+VIProductVersion "${INFO_PRODUCTVERSION}.0"
+VIFileVersion    "${INFO_PRODUCTVERSION}.0"
+
+VIAddVersionKey "CompanyName"     "${INFO_COMPANYNAME}"
+VIAddVersionKey "FileDescription" "${INFO_PRODUCTNAME} Installer"
+VIAddVersionKey "ProductVersion"  "${INFO_PRODUCTVERSION}"
+VIAddVersionKey "FileVersion"     "${INFO_PRODUCTVERSION}"
+VIAddVersionKey "LegalCopyright"  "${INFO_COPYRIGHT}"
+VIAddVersionKey "ProductName"     "${INFO_PRODUCTNAME}"
+
+# Enable HiDPI support. https://nsis.sourceforge.io/Reference/ManifestDPIAware
+ManifestDPIAware true
+
+!include "MUI.nsh"
+
+!define MUI_ICON "..\icon.ico"
+!define MUI_UNICON "..\icon.ico"
+# !define MUI_WELCOMEFINISHPAGE_BITMAP "resources\leftimage.bmp" #Include this to add a bitmap on the left side of the Welcome Page. Must be a size of 164x314
+!define MUI_FINISHPAGE_NOAUTOCLOSE # Wait on the INSTFILES page so the user can take a look into the details of the installation steps
+!define MUI_ABORTWARNING # This will warn the user if they exit from the installer.
+
+!insertmacro MUI_PAGE_WELCOME # Welcome to the installer page.
+# !insertmacro MUI_PAGE_LICENSE "resources\eula.txt" # Adds a EULA page to the installer
+!insertmacro MUI_PAGE_DIRECTORY # In which folder install page.
+!insertmacro MUI_PAGE_INSTFILES # Installing page.
+!insertmacro MUI_PAGE_FINISH # Finished installation page.
+
+!insertmacro MUI_UNPAGE_INSTFILES # Uinstalling page
+
+!insertmacro MUI_LANGUAGE "English" # Set the Language of the installer
+
+## The following two statements can be used to sign the installer and the uninstaller. The path to the binaries are provided in %1
+#!uninstfinalize 'signtool --file "%1"'
+#!finalize 'signtool --file "%1"'
+
+Name "${INFO_PRODUCTNAME}"
+OutFile "..\..\bin\${INFO_PROJECTNAME}-${ARCH}-installer.exe" # Name of the installer's file.
+InstallDir "$PROGRAMFILES64\${INFO_COMPANYNAME}\${INFO_PRODUCTNAME}" # Default installing folder ($PROGRAMFILES is Program Files folder).
+ShowInstDetails show # This will always show the installation details.
+
+Function .onInit
+   !insertmacro wails.checkArchitecture
+FunctionEnd
+
+Section
+    !insertmacro wails.setShellContext
+
+    !insertmacro wails.webview2runtime
+
+    SetOutPath $INSTDIR
+
+    !insertmacro wails.files
+
+    CreateShortcut "$SMPROGRAMS\${INFO_PRODUCTNAME}.lnk" "$INSTDIR\${PRODUCT_EXECUTABLE}"
+    CreateShortCut "$DESKTOP\${INFO_PRODUCTNAME}.lnk" "$INSTDIR\${PRODUCT_EXECUTABLE}"
+
+    !insertmacro wails.associateFiles
+    !insertmacro wails.associateCustomProtocols
+
+    !insertmacro wails.writeUninstaller
+SectionEnd
+
+Section "uninstall"
+    !insertmacro wails.setShellContext
+
+    RMDir /r "$AppData\${PRODUCT_EXECUTABLE}" # Remove the WebView2 DataPath
+
+    RMDir /r $INSTDIR
+
+    Delete "$SMPROGRAMS\${INFO_PRODUCTNAME}.lnk"
+    Delete "$DESKTOP\${INFO_PRODUCTNAME}.lnk"
+
+    !insertmacro wails.unassociateFiles
+    !insertmacro wails.unassociateCustomProtocols
+
+    !insertmacro wails.deleteUninstaller
+SectionEnd
--- a/build/windows/installer/wails_tools.nsh
+++ b/build/windows/installer/wails_tools.nsh
@@ -0,0 +1,249 @@
+# DO NOT EDIT - Generated automatically by `wails build`
+
+!include "x64.nsh"
+!include "WinVer.nsh"
+!include "FileFunc.nsh"
+
+!ifndef INFO_PROJECTNAME
+    !define INFO_PROJECTNAME "{{.Name}}"
+!endif
+!ifndef INFO_COMPANYNAME
+    !define INFO_COMPANYNAME "{{.Info.CompanyName}}"
+!endif
+!ifndef INFO_PRODUCTNAME
+    !define INFO_PRODUCTNAME "{{.Info.ProductName}}"
+!endif
+!ifndef INFO_PRODUCTVERSION
+    !define INFO_PRODUCTVERSION "{{.Info.ProductVersion}}"
+!endif
+!ifndef INFO_COPYRIGHT
+    !define INFO_COPYRIGHT "{{.Info.Copyright}}"
+!endif
+!ifndef PRODUCT_EXECUTABLE
+    !define PRODUCT_EXECUTABLE "${INFO_PROJECTNAME}.exe"
+!endif
+!ifndef UNINST_KEY_NAME
+    !define UNINST_KEY_NAME "${INFO_COMPANYNAME}${INFO_PRODUCTNAME}"
+!endif
+!define UNINST_KEY "Software\Microsoft\Windows\CurrentVersion\Uninstall\${UNINST_KEY_NAME}"
+
+!ifndef REQUEST_EXECUTION_LEVEL
+    !define REQUEST_EXECUTION_LEVEL "admin"
+!endif
+
+RequestExecutionLevel "${REQUEST_EXECUTION_LEVEL}"
+
+!ifdef ARG_WAILS_AMD64_BINARY
+    !define SUPPORTS_AMD64
+!endif
+
+!ifdef ARG_WAILS_ARM64_BINARY
+    !define SUPPORTS_ARM64
+!endif
+
+!ifdef SUPPORTS_AMD64
+    !ifdef SUPPORTS_ARM64
+        !define ARCH "amd64_arm64"
+    !else
+        !define ARCH "amd64"
+    !endif
+!else
+    !ifdef SUPPORTS_ARM64
+        !define ARCH "arm64"
+    !else
+        !error "Wails: Undefined ARCH, please provide at least one of ARG_WAILS_AMD64_BINARY or ARG_WAILS_ARM64_BINARY"
+    !endif
+!endif
+
+!macro wails.checkArchitecture
+    !ifndef WAILS_WIN10_REQUIRED
+        !define WAILS_WIN10_REQUIRED "This product is only supported on Windows 10 (Server 2016) and later."
+    !endif
+
+    !ifndef WAILS_ARCHITECTURE_NOT_SUPPORTED
+        !define WAILS_ARCHITECTURE_NOT_SUPPORTED "This product can't be installed on the current Windows architecture. Supports: ${ARCH}"
+    !endif
+
+    ${If} ${AtLeastWin10}
+        !ifdef SUPPORTS_AMD64
+            ${if} ${IsNativeAMD64}
+                Goto ok
+            ${EndIf}
+        !endif
+
+        !ifdef SUPPORTS_ARM64
+            ${if} ${IsNativeARM64}
+                Goto ok
+            ${EndIf}
+        !endif
+
+        IfSilent silentArch notSilentArch
+        silentArch:
+            SetErrorLevel 65
+            Abort
+        notSilentArch:
+            MessageBox MB_OK "${WAILS_ARCHITECTURE_NOT_SUPPORTED}"
+            Quit
+    ${else}
+        IfSilent silentWin notSilentWin
+        silentWin:
+            SetErrorLevel 64
+            Abort
+        notSilentWin:
+            MessageBox MB_OK "${WAILS_WIN10_REQUIRED}"
+            Quit
+    ${EndIf}
+
+    ok:
+!macroend
+
+!macro wails.files
+    !ifdef SUPPORTS_AMD64
+        ${if} ${IsNativeAMD64}
+            File "/oname=${PRODUCT_EXECUTABLE}" "${ARG_WAILS_AMD64_BINARY}"
+        ${EndIf}
+    !endif
+
+    !ifdef SUPPORTS_ARM64
+        ${if} ${IsNativeARM64}
+            File "/oname=${PRODUCT_EXECUTABLE}" "${ARG_WAILS_ARM64_BINARY}"
+        ${EndIf}
+    !endif
+!macroend
+
+!macro wails.writeUninstaller
+    WriteUninstaller "$INSTDIR\uninstall.exe"
+
+    SetRegView 64
+    WriteRegStr HKLM "${UNINST_KEY}" "Publisher" "${INFO_COMPANYNAME}"
+    WriteRegStr HKLM "${UNINST_KEY}" "DisplayName" "${INFO_PRODUCTNAME}"
+    WriteRegStr HKLM "${UNINST_KEY}" "DisplayVersion" "${INFO_PRODUCTVERSION}"
+    WriteRegStr HKLM "${UNINST_KEY}" "DisplayIcon" "$INSTDIR\${PRODUCT_EXECUTABLE}"
+    WriteRegStr HKLM "${UNINST_KEY}" "UninstallString" "$\"$INSTDIR\uninstall.exe$\""
+    WriteRegStr HKLM "${UNINST_KEY}" "QuietUninstallString" "$\"$INSTDIR\uninstall.exe$\" /S"
+
+    ${GetSize} "$INSTDIR" "/S=0K" $0 $1 $2
+    IntFmt $0 "0x%08X" $0
+    WriteRegDWORD HKLM "${UNINST_KEY}" "EstimatedSize" "$0"
+!macroend
+
+!macro wails.deleteUninstaller
+    Delete "$INSTDIR\uninstall.exe"
+
+    SetRegView 64
+    DeleteRegKey HKLM "${UNINST_KEY}"
+!macroend
+
+!macro wails.setShellContext
+    ${If} ${REQUEST_EXECUTION_LEVEL} == "admin"
+        SetShellVarContext all
+    ${else}
+        SetShellVarContext current
+    ${EndIf}
+!macroend
+
+# Install webview2 by launching the bootstrapper
+# See https://docs.microsoft.com/en-us/microsoft-edge/webview2/concepts/distribution#online-only-deployment
+!macro wails.webview2runtime
+    !ifndef WAILS_INSTALL_WEBVIEW_DETAILPRINT
+        !define WAILS_INSTALL_WEBVIEW_DETAILPRINT "Installing: WebView2 Runtime"
+    !endif
+
+    SetRegView 64
+	# If the admin key exists and is not empty then webview2 is already installed
+	ReadRegStr $0 HKLM "SOFTWARE\WOW6432Node\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}" "pv"
+    ${If} $0 != ""
+        Goto ok
+    ${EndIf}
+
+    ${If} ${REQUEST_EXECUTION_LEVEL} == "user"
+        # If the installer is run in user level, check the user specific key exists and is not empty then webview2 is already installed
+	    ReadRegStr $0 HKCU "Software\Microsoft\EdgeUpdate\Clients\{F3017226-FE2A-4295-8BDF-00C3A9A7E4C5}" "pv"
+        ${If} $0 != ""
+            Goto ok
+        ${EndIf}
+     ${EndIf}
+
+	SetDetailsPrint both
+    DetailPrint "${WAILS_INSTALL_WEBVIEW_DETAILPRINT}"
+    SetDetailsPrint listonly
+
+    InitPluginsDir
+    CreateDirectory "$pluginsdir\webview2bootstrapper"
+    SetOutPath "$pluginsdir\webview2bootstrapper"
+    File "tmp\MicrosoftEdgeWebview2Setup.exe"
+    ExecWait '"$pluginsdir\webview2bootstrapper\MicrosoftEdgeWebview2Setup.exe" /silent /install'
+
+    SetDetailsPrint both
+    ok:
+!macroend
+
+# Copy of APP_ASSOCIATE and APP_UNASSOCIATE macros from here https://gist.github.com/nikku/281d0ef126dbc215dd58bfd5b3a5cd5b
+!macro APP_ASSOCIATE EXT FILECLASS DESCRIPTION ICON COMMANDTEXT COMMAND
+  ; Backup the previously associated file class
+  ReadRegStr $R0 SHELL_CONTEXT "Software\Classes\.${EXT}" ""
+  WriteRegStr SHELL_CONTEXT "Software\Classes\.${EXT}" "${FILECLASS}_backup" "$R0"
+
+  WriteRegStr SHELL_CONTEXT "Software\Classes\.${EXT}" "" "${FILECLASS}"
+
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${FILECLASS}" "" `${DESCRIPTION}`
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${FILECLASS}\DefaultIcon" "" `${ICON}`
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${FILECLASS}\shell" "" "open"
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${FILECLASS}\shell\open" "" `${COMMANDTEXT}`
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${FILECLASS}\shell\open\command" "" `${COMMAND}`
+!macroend
+
+!macro APP_UNASSOCIATE EXT FILECLASS
+  ; Backup the previously associated file class
+  ReadRegStr $R0 SHELL_CONTEXT "Software\Classes\.${EXT}" `${FILECLASS}_backup`
+  WriteRegStr SHELL_CONTEXT "Software\Classes\.${EXT}" "" "$R0"
+
+  DeleteRegKey SHELL_CONTEXT `Software\Classes\${FILECLASS}`
+!macroend
+
+!macro wails.associateFiles
+    ; Create file associations
+    {{range .Info.FileAssociations}}
+      !insertmacro APP_ASSOCIATE "{{.Ext}}" "{{.Name}}" "{{.Description}}" "$INSTDIR\{{.IconName}}.ico" "Open with ${INFO_PRODUCTNAME}" "$INSTDIR\${PRODUCT_EXECUTABLE} $\"%1$\""
+
+      File "..\{{.IconName}}.ico"
+    {{end}}
+!macroend
+
+!macro wails.unassociateFiles
+    ; Delete app associations
+    {{range .Info.FileAssociations}}
+      !insertmacro APP_UNASSOCIATE "{{.Ext}}" "{{.Name}}"
+
+      Delete "$INSTDIR\{{.IconName}}.ico"
+    {{end}}
+!macroend
+
+!macro CUSTOM_PROTOCOL_ASSOCIATE PROTOCOL DESCRIPTION ICON COMMAND
+  DeleteRegKey SHELL_CONTEXT "Software\Classes\${PROTOCOL}"
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${PROTOCOL}" "" "${DESCRIPTION}"
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${PROTOCOL}" "URL Protocol" ""
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${PROTOCOL}\DefaultIcon" "" "${ICON}"
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${PROTOCOL}\shell" "" ""
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${PROTOCOL}\shell\open" "" ""
+  WriteRegStr SHELL_CONTEXT "Software\Classes\${PROTOCOL}\shell\open\command" "" "${COMMAND}"
+!macroend
+
+!macro CUSTOM_PROTOCOL_UNASSOCIATE PROTOCOL
+  DeleteRegKey SHELL_CONTEXT "Software\Classes\${PROTOCOL}"
+!macroend
+
+!macro wails.associateCustomProtocols
+    ; Create custom protocols associations
+    {{range .Info.Protocols}}
+      !insertmacro CUSTOM_PROTOCOL_ASSOCIATE "{{.Scheme}}" "{{.Description}}" "$INSTDIR\${PRODUCT_EXECUTABLE},0" "$INSTDIR\${PRODUCT_EXECUTABLE} $\"%1$\""
+
+    {{end}}
+!macroend
+
+!macro wails.unassociateCustomProtocols
+    ; Delete app custom protocol associations
+    {{range .Info.Protocols}}
+      !insertmacro CUSTOM_PROTOCOL_UNASSOCIATE "{{.Scheme}}"
+    {{end}}
+!macroend
--- a/build/windows/wails.exe.manifest
+++ b/build/windows/wails.exe.manifest
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3">
+    <assemblyIdentity type="win32" name="com.wails.{{.Name}}" version="{{.Info.ProductVersion}}.0" processorArchitecture="*"/>
+    <dependency>
+        <dependentAssembly>
+            <assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="*" publicKeyToken="6595b64144ccf1df" language="*"/>
+        </dependentAssembly>
+    </dependency>
+    <asmv3:application>
+        <asmv3:windowsSettings>
+            <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true/pm</dpiAware> <!-- fallback for Windows 7 and 8 -->
+            <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">permonitorv2,permonitor</dpiAwareness> <!-- falls back to per-monitor if per-monitor v2 is not supported -->
+        </asmv3:windowsSettings>
+    </asmv3:application>
+</assembly>
--- a/frontend/.vscode/extensions.json
+++ b/frontend/.vscode/extensions.json
@@ -0,0 +1,5 @@
+{
+  "recommendations": [
+    "svelte.svelte-vscode"
+  ]
+}
--- a/frontend/README.md
+++ b/frontend/README.md
@@ -0,0 +1,65 @@
+# Svelte + TS + Vite
+
+This template should help get you started developing with Svelte and TypeScript in Vite.
+
+## Recommended IDE Setup
+
+[VS Code](https://code.visualstudio.com/)
+
+ [Svelte](https://marketplace.visualstudio.com/items?itemName=svelte.svelte-vscode).
+
+## Need an official Svelte framework?
+
+Check out [SvelteKit](https://github.com/sveltejs/kit#readme), which is also powered by Vite. Deploy anywhere with its
+serverless-first approach and adapt to various platforms, with out of the box support for TypeScript, SCSS, and Less,
+and easily-added support for mdsvex, GraphQL, PostCSS, Tailwind CSS, and more.
+
+## Technical considerations
+
+**Why use this over SvelteKit?**
+
+- It brings its own routing solution which might not be preferable for some users.
+- It is first and foremost a framework that just happens to use Vite under the hood, not a Vite app.
+  `vite dev` and `vite build` wouldn't work in a SvelteKit environment, for example.
+
+This template contains as little as possible to get started with Vite + TypeScript + Svelte, while taking into account
+the developer experience with regards to HMR and intellisense. It demonstrates capabilities on par with the
+other `create-vite` templates and is a good starting point for beginners dipping their toes into a Vite + Svelte
+project.
+
+Should you later need the extended capabilities and extensibility provided by SvelteKit, the template has been
+structured similarly to SvelteKit so that it is easy to migrate.
+
+**Why `global.d.ts` instead of `compilerOptions.types` inside `jsconfig.json` or `tsconfig.json`?**
+
+Setting `compilerOptions.types` shuts out all other types not explicitly listed in the configuration. Using triple-slash
+references keeps the default TypeScript setting of accepting type information from the entire workspace, while also
+adding `svelte` and `vite/client` type information.
+
+**Why include `.vscode/extensions.json`?**
+
+Other templates indirectly recommend extensions via the README, but this file allows VS Code to prompt the user to
+install the recommended extension upon opening the project.
+
+**Why enable `allowJs` in the TS template?**
+
+While `allowJs: false` would indeed prevent the use of `.js` files in the project, it does not prevent the use of
+JavaScript syntax in `.svelte` files. In addition, it would force `checkJs: false`, bringing the worst of both worlds:
+not being able to guarantee the entire codebase is TypeScript, and also having worse typechecking for the existing
+JavaScript. In addition, there are valid use cases in which a mixed codebase may be relevant.
+
+**Why is HMR not preserving my local component state?**
+
+HMR state preservation comes with a number of gotchas! It has been disabled by default in both `svelte-hmr`
+and `@sveltejs/vite-plugin-svelte` due to its often surprising behavior. You can read the
+details [here](https://github.com/rixo/svelte-hmr#svelte-hmr).
+
+If you have state that's important to retain within a component, consider creating an external store which would not be
+replaced by HMR.
+
+```ts
+// store.ts
+// An extremely simple external store
+import { writable } from 'svelte/store'
+export default writable(0)
+```
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8"/>
+    <meta content="width=device-width, initial-scale=1.0" name="viewport"/>
+    <title>field-sync-gui</title>
+</head>
+<body>
+<div id="app"></div>
+<script src="./src/main.ts" type="module"></script>
+</body>
+</html>
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "frontend",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview",
+    "check": "svelte-check --tsconfig ./tsconfig.json"
+  },
+  "devDependencies": {
+    "@sveltejs/vite-plugin-svelte": "^1.0.1",
+    "@tsconfig/svelte": "^3.0.0",
+    "autoprefixer": "^10.5.0",
+    "postcss": "^8.5.12",
+    "svelte": "^3.49.0",
+    "svelte-check": "^2.8.0",
+    "svelte-preprocess": "^4.10.7",
+    "tailwindcss": "^3.4.19",
+    "tslib": "^2.4.0",
+    "typescript": "^4.6.4",
+    "vite": "^3.0.7"
+  }
+}
--- a/frontend/package.json.md5
+++ b/frontend/package.json.md5
@@ -0,0 +1 @@
+36b6674c0722b2faf74140bf7f48e46c
--- a/frontend/postcss.config.js
+++ b/frontend/postcss.config.js
@@ -0,0 +1,6 @@
+export default {
+  plugins: {
+    tailwindcss: {},
+    autoprefixer: {},
+  },
+}
--- a/frontend/src/App.svelte
+++ b/frontend/src/App.svelte
@@ -0,0 +1,124 @@
+<script lang="ts">
+  import { onMount } from 'svelte';
+  import { ScanCards, StartIngest, CancelIngest, GetSnapshot, SetDryRun, LoadConfig } from '../wailsjs/go/main/App';
+  import { EventsOn } from '../wailsjs/runtime/runtime';
+
+  let cards: any[] = [];
+  let snapshot: any = { slots: [], running: false, dryRun: false, sessionID: '', config: {} };
+  let dryRun = false;
+
+  async function refresh() {
+    cards = await ScanCards();
+    snapshot = await GetSnapshot();
+  }
+
+  async function start() {
+    const payload = cards.slice(0, 4).map((c: any, i: number) => ({
+      slot: ['A','B','C','D'][i],
+      mountpoint: c.mountpoint,
+    }));
+    await StartIngest(payload);
+  }
+
+  async function cancel() { await CancelIngest(); await refresh(); }
+
+  function toggleDryRun() {
+    dryRun = !dryRun;
+    SetDryRun(dryRun);
+  }
+
+  onMount(() => {
+    refresh();
+    const t = setInterval(refresh, 3000);
+    EventsOn('slot-update', () => refresh());
+    EventsOn('session-done', () => refresh());
+    return () => clearInterval(t);
+  });
+
+  function pct(done: number, total: number) {
+    if (!total) return 0;
+    return Math.round((done / total) * 100);
+  }
+
+  function fmtBytes(b: number) {
+    if (b < 1024) return b + ' B';
+    if (b < 1024*1024) return (b/1024).toFixed(1) + ' KB';
+    if (b < 1024*1024*1024) return (b/1024/1024).toFixed(1) + ' MB';
+    return (b/1024/1024/1024).toFixed(2) + ' GB';
+  }
+</script>
+
+<div class="min-h-screen p-6 flex flex-col gap-6">
+  <header class="flex items-center justify-between border-b border-slate-700 pb-4">
+    <div>
+      <h1 class="text-3xl font-bold text-cyan-400">field-sync</h1>
+      <p class="text-sm text-slate-400">Cosma terrain · SD → local + S3</p>
+    </div>
+    <div class="text-right text-xs text-slate-400">
+      <div>Session: <span class="text-slate-200">{snapshot.sessionID || '—'}</span></div>
+      <div>Bucket: <span class="text-slate-200">{snapshot.config?.s3Bucket || '—'}</span></div>
+      <div>Dest: <span class="text-slate-200">{snapshot.config?.localDest || '—'}</span></div>
+    </div>
+  </header>
+
+  <section class="grid grid-cols-2 gap-4">
+    {#each ['A','B','C','D'] as letter, i}
+      {@const s = (snapshot.slots && snapshot.slots[i]) || { slot: letter, status: 'idle' }}
+      {@const card = cards[i]}
+      <div class="bg-slate-800 rounded-2xl p-5 border border-slate-700 shadow-lg">
+        <div class="flex items-center justify-between mb-3">
+          <div class="text-2xl font-bold text-cyan-300">SLOT {letter}</div>
+          <span class="px-3 py-1 rounded-full text-xs font-mono uppercase tracking-wider"
+                class:bg-slate-700={s.status==='idle'}
+                class:bg-blue-700={s.status==='copying'||s.status==='scanning'}
+                class:bg-amber-600={s.status==='uploading'}
+                class:bg-emerald-700={s.status==='done'}
+                class:bg-red-700={s.status==='error'}>{s.status || 'idle'}</span>
+        </div>
+        {#if card}
+          <div class="text-sm text-slate-300 mb-1 truncate">{card.label || card.mountpoint}</div>
+          <div class="text-xs text-slate-500 mb-3 truncate">{card.mountpoint}</div>
+        {:else}
+          <div class="text-sm text-slate-500 italic mb-3">— vide —</div>
+        {/if}
+        <div class="space-y-2">
+          <div>
+            <div class="flex justify-between text-xs text-slate-400">
+              <span>Fichiers</span><span>{s.filesDone || 0} / {s.filesTotal || 0}</span>
+            </div>
+            <div class="w-full bg-slate-700 rounded h-2 overflow-hidden">
+              <div class="h-full bg-cyan-500 transition-all" style="width: {pct(s.filesDone, s.filesTotal)}%"></div>
+            </div>
+          </div>
+          <div>
+            <div class="flex justify-between text-xs text-slate-400">
+              <span>Octets</span><span>{fmtBytes(s.bytesDone || 0)} / {fmtBytes(s.bytesTotal || 0)}</span>
+            </div>
+            <div class="w-full bg-slate-700 rounded h-2 overflow-hidden">
+              <div class="h-full bg-emerald-500 transition-all" style="width: {pct(s.bytesDone, s.bytesTotal)}%"></div>
+            </div>
+          </div>
+          {#if s.speedMBs}<div class="text-xs text-slate-400">{s.speedMBs.toFixed(1)} MB/s</div>{/if}
+          {#if s.error}<div class="text-xs text-red-400 mt-1">⚠ {s.error}</div>{/if}
+        </div>
+      </div>
+    {/each}
+  </section>
+
+  <footer class="flex gap-3 items-center mt-auto border-t border-slate-700 pt-4">
+    <button on:click={refresh} class="px-5 py-3 bg-slate-700 hover:bg-slate-600 rounded-lg font-semibold">↻ Rescan</button>
+    <button on:click={start} disabled={snapshot.running || cards.length===0}
+            class="px-6 py-3 bg-cyan-600 hover:bg-cyan-500 disabled:bg-slate-700 disabled:text-slate-500 rounded-lg font-bold text-lg">
+      ▶ START INGEST
+    </button>
+    <button on:click={cancel} disabled={!snapshot.running}
+            class="px-5 py-3 bg-red-700 hover:bg-red-600 disabled:bg-slate-700 disabled:text-slate-500 rounded-lg font-semibold">
+      ✕ Cancel
+    </button>
+    <label class="flex items-center gap-2 ml-4 text-sm cursor-pointer">
+      <input type="checkbox" bind:checked={dryRun} on:change={toggleDryRun} class="w-4 h-4">
+      Dry-run
+    </label>
+    <div class="ml-auto text-xs text-slate-500">{cards.length} carte(s) détectée(s)</div>
+  </footer>
+</div>
--- a/frontend/src/assets/fonts/OFL.txt
+++ b/frontend/src/assets/fonts/OFL.txt
@@ -0,0 +1,93 @@
+Copyright 2016 The Nunito Project Authors (contact@sansoxygen.com),
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.
--- a/frontend/src/assets/fonts/nunito-v16-latin-regular.woff2
+++ b/frontend/src/assets/fonts/nunito-v16-latin-regular.woff2
--- a/frontend/src/assets/images/logo-universal.png
+++ b/frontend/src/assets/images/logo-universal.png
--- a/frontend/src/main.ts
+++ b/frontend/src/main.ts
@@ -0,0 +1,8 @@
+import './style.css'
+import App from './App.svelte'
+
+const app = new App({
+  target: document.getElementById('app')
+})
+
+export default app
--- a/frontend/src/style.css
+++ b/frontend/src/style.css
@@ -0,0 +1,5 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+html, body { @apply bg-slate-900 text-slate-100 h-full m-0; font-family: system-ui, sans-serif; }
--- a/frontend/src/vite-env.d.ts
+++ b/frontend/src/vite-env.d.ts
@@ -0,0 +1,2 @@
+/// <reference types="svelte" />
+/// <reference types="vite/client" />
--- a/frontend/svelte.config.js
+++ b/frontend/svelte.config.js
@@ -0,0 +1,7 @@
+import sveltePreprocess from 'svelte-preprocess'
+
+export default {
+  // Consult https://github.com/sveltejs/svelte-preprocess
+  // for more information about preprocessors
+  preprocess: sveltePreprocess()
+}
--- a/frontend/tailwind.config.js
+++ b/frontend/tailwind.config.js
@@ -0,0 +1,14 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: ["./index.html", "./src/**/*.{svelte,ts,js}"],
+  darkMode: 'class',
+  theme: {
+    extend: {
+      fontFamily: {
+        mono: ['JetBrains Mono', 'Fira Code', 'Consolas', 'monospace'],
+      },
+    },
+  },
+  plugins: [],
+}
+
--- a/frontend/tsconfig.json
+++ b/frontend/tsconfig.json
@@ -0,0 +1,30 @@
+{
+  "extends": "@tsconfig/svelte/tsconfig.json",
+  "compilerOptions": {
+    "target": "ESNext",
+    "useDefineForClassFields": true,
+    "module": "ESNext",
+    "resolveJsonModule": true,
+    "baseUrl": ".",
+    /**
+     * Typecheck JS in `.svelte` and `.js` files by default.
+     * Disable checkJs if you'd like to use dynamic types in JS.
+     * Note that setting allowJs false does not prevent the use
+     * of JS in `.svelte` files.
+     */
+    "allowJs": true,
+    "checkJs": true,
+    "isolatedModules": true
+  },
+  "include": [
+    "src/**/*.d.ts",
+    "src/**/*.ts",
+    "src/**/*.js",
+    "src/**/*.svelte"
+  ],
+  "references": [
+    {
+      "path": "./tsconfig.node.json"
+    }
+  ]
+}
--- a/frontend/tsconfig.node.json
+++ b/frontend/tsconfig.node.json
@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "composite": true,
+    "module": "ESNext",
+    "moduleResolution": "Node"
+  },
+  "include": [
+    "vite.config.ts"
+  ]
+}
--- a/frontend/vite.config.ts
+++ b/frontend/vite.config.ts
@@ -0,0 +1,7 @@
+import {defineConfig} from 'vite'
+import {svelte} from '@sveltejs/vite-plugin-svelte'
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  plugins: [svelte()]
+})
--- a/frontend/wailsjs/go/main/App.d.ts
+++ b/frontend/wailsjs/go/main/App.d.ts
@@ -0,0 +1,17 @@
+// Cynhyrchwyd y ffeil hon yn awtomatig. PEIDIWCH Â MODIWL
+// This file is automatically generated. DO NOT EDIT
+import {main} from '../models';
+import {config} from '../models';
+import {detect} from '../models';
+
+export function CancelIngest():Promise<void>;
+
+export function GetSnapshot():Promise<main.Snapshot>;
+
+export function LoadConfig():Promise<config.Config>;
+
+export function ScanCards():Promise<Array<detect.SDCard>>;
+
+export function SetDryRun(arg1:boolean):Promise<void>;
+
+export function StartIngest(arg1:Array<main.SlotPayload>):Promise<void>;
--- a/frontend/wailsjs/go/main/App.js
+++ b/frontend/wailsjs/go/main/App.js
@@ -0,0 +1,27 @@
+// @ts-check
+// Cynhyrchwyd y ffeil hon yn awtomatig. PEIDIWCH Â MODIWL
+// This file is automatically generated. DO NOT EDIT
+
+export function CancelIngest() {
+  return window['go']['main']['App']['CancelIngest']();
+}
+
+export function GetSnapshot() {
+  return window['go']['main']['App']['GetSnapshot']();
+}
+
+export function LoadConfig() {
+  return window['go']['main']['App']['LoadConfig']();
+}
+
+export function ScanCards() {
+  return window['go']['main']['App']['ScanCards']();
+}
+
+export function SetDryRun(arg1) {
+  return window['go']['main']['App']['SetDryRun'](arg1);
+}
+
+export function StartIngest(arg1) {
+  return window['go']['main']['App']['StartIngest'](arg1);
+}
--- a/frontend/wailsjs/go/models.ts
+++ b/frontend/wailsjs/go/models.ts
@@ -0,0 +1,139 @@
+export namespace config {
+	
+	export class Config {
+	    s3Bucket: string;
+	    localDest: string;
+	    awsProfile: string;
+	    concurrency: number;
+	
+	    static createFrom(source: any = {}) {
+	        return new Config(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.s3Bucket = source["s3Bucket"];
+	        this.localDest = source["localDest"];
+	        this.awsProfile = source["awsProfile"];
+	        this.concurrency = source["concurrency"];
+	    }
+	}
+
+}
+
+export namespace detect {
+	
+	export class SDCard {
+	    mountpoint: string;
+	    label: string;
+	    device: string;
+	    fstype: string;
+	    totalBytes: number;
+	    freeBytes: number;
+	    mediaFiles: string[];
+	
+	    static createFrom(source: any = {}) {
+	        return new SDCard(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.mountpoint = source["mountpoint"];
+	        this.label = source["label"];
+	        this.device = source["device"];
+	        this.fstype = source["fstype"];
+	        this.totalBytes = source["totalBytes"];
+	        this.freeBytes = source["freeBytes"];
+	        this.mediaFiles = source["mediaFiles"];
+	    }
+	}
+
+}
+
+export namespace main {
+	
+	export class SlotPayload {
+	    slot: string;
+	    mountpoint: string;
+	
+	    static createFrom(source: any = {}) {
+	        return new SlotPayload(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.slot = source["slot"];
+	        this.mountpoint = source["mountpoint"];
+	    }
+	}
+	export class SlotState {
+	    slot: string;
+	    mountpoint: string;
+	    label: string;
+	    status: string;
+	    filesTotal: number;
+	    filesDone: number;
+	    bytesTotal: number;
+	    bytesDone: number;
+	    speedMBs: number;
+	    error?: string;
+	
+	    static createFrom(source: any = {}) {
+	        return new SlotState(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.slot = source["slot"];
+	        this.mountpoint = source["mountpoint"];
+	        this.label = source["label"];
+	        this.status = source["status"];
+	        this.filesTotal = source["filesTotal"];
+	        this.filesDone = source["filesDone"];
+	        this.bytesTotal = source["bytesTotal"];
+	        this.bytesDone = source["bytesDone"];
+	        this.speedMBs = source["speedMBs"];
+	        this.error = source["error"];
+	    }
+	}
+	export class Snapshot {
+	    sessionID: string;
+	    slots: SlotState[];
+	    running: boolean;
+	    dryRun: boolean;
+	    config: config.Config;
+	
+	    static createFrom(source: any = {}) {
+	        return new Snapshot(source);
+	    }
+	
+	    constructor(source: any = {}) {
+	        if ('string' === typeof source) source = JSON.parse(source);
+	        this.sessionID = source["sessionID"];
+	        this.slots = this.convertValues(source["slots"], SlotState);
+	        this.running = source["running"];
+	        this.dryRun = source["dryRun"];
+	        this.config = this.convertValues(source["config"], config.Config);
+	    }
+	
+		convertValues(a: any, classs: any, asMap: boolean = false): any {
+		    if (!a) {
+		        return a;
+		    }
+		    if (a.slice && a.map) {
+		        return (a as any[]).map(elem => this.convertValues(elem, classs));
+		    } else if ("object" === typeof a) {
+		        if (asMap) {
+		            for (const key of Object.keys(a)) {
+		                a[key] = new classs(a[key]);
+		            }
+		            return a;
+		        }
+		        return new classs(a);
+		    }
+		    return a;
+		}
+	}
+
+}
+
--- a/frontend/wailsjs/runtime/package.json
+++ b/frontend/wailsjs/runtime/package.json
@@ -0,0 +1,24 @@
+{
+  "name": "@wailsapp/runtime",
+  "version": "2.0.0",
+  "description": "Wails Javascript runtime library",
+  "main": "runtime.js",
+  "types": "runtime.d.ts",
+  "scripts": {
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/wailsapp/wails.git"
+  },
+  "keywords": [
+    "Wails",
+    "Javascript",
+    "Go"
+  ],
+  "author": "Lea Anthony <lea.anthony@gmail.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/wailsapp/wails/issues"
+  },
+  "homepage": "https://github.com/wailsapp/wails#readme"
+}
--- a/frontend/wailsjs/runtime/runtime.d.ts
+++ b/frontend/wailsjs/runtime/runtime.d.ts
@@ -0,0 +1,330 @@
+/*
+ _       __      _ __
+| |     / /___ _(_) /____
+| | /| / / __ `/ / / ___/
+| |/ |/ / /_/ / / (__  )
+|__/|__/\__,_/_/_/____/
+The electron alternative for Go
+(c) Lea Anthony 2019-present
+*/
+
+export interface Position {
+    x: number;
+    y: number;
+}
+
+export interface Size {
+    w: number;
+    h: number;
+}
+
+export interface Screen {
+    isCurrent: boolean;
+    isPrimary: boolean;
+    width : number
+    height : number
+}
+
+// Environment information such as platform, buildtype, ...
+export interface EnvironmentInfo {
+    buildType: string;
+    platform: string;
+    arch: string;
+}
+
+// [EventsEmit](https://wails.io/docs/reference/runtime/events#eventsemit)
+// emits the given event. Optional data may be passed with the event.
+// This will trigger any event listeners.
+export function EventsEmit(eventName: string, ...data: any): void;
+
+// [EventsOn](https://wails.io/docs/reference/runtime/events#eventson) sets up a listener for the given event name.
+export function EventsOn(eventName: string, callback: (...data: any) => void): () => void;
+
+// [EventsOnMultiple](https://wails.io/docs/reference/runtime/events#eventsonmultiple)
+// sets up a listener for the given event name, but will only trigger a given number times.
+export function EventsOnMultiple(eventName: string, callback: (...data: any) => void, maxCallbacks: number): () => void;
+
+// [EventsOnce](https://wails.io/docs/reference/runtime/events#eventsonce)
+// sets up a listener for the given event name, but will only trigger once.
+export function EventsOnce(eventName: string, callback: (...data: any) => void): () => void;
+
+// [EventsOff](https://wails.io/docs/reference/runtime/events#eventsoff)
+// unregisters the listener for the given event name.
+export function EventsOff(eventName: string, ...additionalEventNames: string[]): void;
+
+// [EventsOffAll](https://wails.io/docs/reference/runtime/events#eventsoffall)
+// unregisters all listeners.
+export function EventsOffAll(): void;
+
+// [LogPrint](https://wails.io/docs/reference/runtime/log#logprint)
+// logs the given message as a raw message
+export function LogPrint(message: string): void;
+
+// [LogTrace](https://wails.io/docs/reference/runtime/log#logtrace)
+// logs the given message at the `trace` log level.
+export function LogTrace(message: string): void;
+
+// [LogDebug](https://wails.io/docs/reference/runtime/log#logdebug)
+// logs the given message at the `debug` log level.
+export function LogDebug(message: string): void;
+
+// [LogError](https://wails.io/docs/reference/runtime/log#logerror)
+// logs the given message at the `error` log level.
+export function LogError(message: string): void;
+
+// [LogFatal](https://wails.io/docs/reference/runtime/log#logfatal)
+// logs the given message at the `fatal` log level.
+// The application will quit after calling this method.
+export function LogFatal(message: string): void;
+
+// [LogInfo](https://wails.io/docs/reference/runtime/log#loginfo)
+// logs the given message at the `info` log level.
+export function LogInfo(message: string): void;
+
+// [LogWarning](https://wails.io/docs/reference/runtime/log#logwarning)
+// logs the given message at the `warning` log level.
+export function LogWarning(message: string): void;
+
+// [WindowReload](https://wails.io/docs/reference/runtime/window#windowreload)
+// Forces a reload by the main application as well as connected browsers.
+export function WindowReload(): void;
+
+// [WindowReloadApp](https://wails.io/docs/reference/runtime/window#windowreloadapp)
+// Reloads the application frontend.
+export function WindowReloadApp(): void;
+
+// [WindowSetAlwaysOnTop](https://wails.io/docs/reference/runtime/window#windowsetalwaysontop)
+// Sets the window AlwaysOnTop or not on top.
+export function WindowSetAlwaysOnTop(b: boolean): void;
+
+// [WindowSetSystemDefaultTheme](https://wails.io/docs/next/reference/runtime/window#windowsetsystemdefaulttheme)
+// *Windows only*
+// Sets window theme to system default (dark/light).
+export function WindowSetSystemDefaultTheme(): void;
+
+// [WindowSetLightTheme](https://wails.io/docs/next/reference/runtime/window#windowsetlighttheme)
+// *Windows only*
+// Sets window to light theme.
+export function WindowSetLightTheme(): void;
+
+// [WindowSetDarkTheme](https://wails.io/docs/next/reference/runtime/window#windowsetdarktheme)
+// *Windows only*
+// Sets window to dark theme.
+export function WindowSetDarkTheme(): void;
+
+// [WindowCenter](https://wails.io/docs/reference/runtime/window#windowcenter)
+// Centers the window on the monitor the window is currently on.
+export function WindowCenter(): void;
+
+// [WindowSetTitle](https://wails.io/docs/reference/runtime/window#windowsettitle)
+// Sets the text in the window title bar.
+export function WindowSetTitle(title: string): void;
+
+// [WindowFullscreen](https://wails.io/docs/reference/runtime/window#windowfullscreen)
+// Makes the window full screen.
+export function WindowFullscreen(): void;
+
+// [WindowUnfullscreen](https://wails.io/docs/reference/runtime/window#windowunfullscreen)
+// Restores the previous window dimensions and position prior to full screen.
+export function WindowUnfullscreen(): void;
+
+// [WindowIsFullscreen](https://wails.io/docs/reference/runtime/window#windowisfullscreen)
+// Returns the state of the window, i.e. whether the window is in full screen mode or not.
+export function WindowIsFullscreen(): Promise<boolean>;
+
+// [WindowSetSize](https://wails.io/docs/reference/runtime/window#windowsetsize)
+// Sets the width and height of the window.
+export function WindowSetSize(width: number, height: number): void;
+
+// [WindowGetSize](https://wails.io/docs/reference/runtime/window#windowgetsize)
+// Gets the width and height of the window.
+export function WindowGetSize(): Promise<Size>;
+
+// [WindowSetMaxSize](https://wails.io/docs/reference/runtime/window#windowsetmaxsize)
+// Sets the maximum window size. Will resize the window if the window is currently larger than the given dimensions.
+// Setting a size of 0,0 will disable this constraint.
+export function WindowSetMaxSize(width: number, height: number): void;
+
+// [WindowSetMinSize](https://wails.io/docs/reference/runtime/window#windowsetminsize)
+// Sets the minimum window size. Will resize the window if the window is currently smaller than the given dimensions.
+// Setting a size of 0,0 will disable this constraint.
+export function WindowSetMinSize(width: number, height: number): void;
+
+// [WindowSetPosition](https://wails.io/docs/reference/runtime/window#windowsetposition)
+// Sets the window position relative to the monitor the window is currently on.
+export function WindowSetPosition(x: number, y: number): void;
+
+// [WindowGetPosition](https://wails.io/docs/reference/runtime/window#windowgetposition)
+// Gets the window position relative to the monitor the window is currently on.
+export function WindowGetPosition(): Promise<Position>;
+
+// [WindowHide](https://wails.io/docs/reference/runtime/window#windowhide)
+// Hides the window.
+export function WindowHide(): void;
+
+// [WindowShow](https://wails.io/docs/reference/runtime/window#windowshow)
+// Shows the window, if it is currently hidden.
+export function WindowShow(): void;
+
+// [WindowMaximise](https://wails.io/docs/reference/runtime/window#windowmaximise)
+// Maximises the window to fill the screen.
+export function WindowMaximise(): void;
+
+// [WindowToggleMaximise](https://wails.io/docs/reference/runtime/window#windowtogglemaximise)
+// Toggles between Maximised and UnMaximised.
+export function WindowToggleMaximise(): void;
+
+// [WindowUnmaximise](https://wails.io/docs/reference/runtime/window#windowunmaximise)
+// Restores the window to the dimensions and position prior to maximising.
+export function WindowUnmaximise(): void;
+
+// [WindowIsMaximised](https://wails.io/docs/reference/runtime/window#windowismaximised)
+// Returns the state of the window, i.e. whether the window is maximised or not.
+export function WindowIsMaximised(): Promise<boolean>;
+
+// [WindowMinimise](https://wails.io/docs/reference/runtime/window#windowminimise)
+// Minimises the window.
+export function WindowMinimise(): void;
+
+// [WindowUnminimise](https://wails.io/docs/reference/runtime/window#windowunminimise)
+// Restores the window to the dimensions and position prior to minimising.
+export function WindowUnminimise(): void;
+
+// [WindowIsMinimised](https://wails.io/docs/reference/runtime/window#windowisminimised)
+// Returns the state of the window, i.e. whether the window is minimised or not.
+export function WindowIsMinimised(): Promise<boolean>;
+
+// [WindowIsNormal](https://wails.io/docs/reference/runtime/window#windowisnormal)
+// Returns the state of the window, i.e. whether the window is normal or not.
+export function WindowIsNormal(): Promise<boolean>;
+
+// [WindowSetBackgroundColour](https://wails.io/docs/reference/runtime/window#windowsetbackgroundcolour)
+// Sets the background colour of the window to the given RGBA colour definition. This colour will show through for all transparent pixels.
+export function WindowSetBackgroundColour(R: number, G: number, B: number, A: number): void;
+
+// [ScreenGetAll](https://wails.io/docs/reference/runtime/window#screengetall)
+// Gets the all screens. Call this anew each time you want to refresh data from the underlying windowing system.
+export function ScreenGetAll(): Promise<Screen[]>;
+
+// [BrowserOpenURL](https://wails.io/docs/reference/runtime/browser#browseropenurl)
+// Opens the given URL in the system browser.
+export function BrowserOpenURL(url: string): void;
+
+// [Environment](https://wails.io/docs/reference/runtime/intro#environment)
+// Returns information about the environment
+export function Environment(): Promise<EnvironmentInfo>;
+
+// [Quit](https://wails.io/docs/reference/runtime/intro#quit)
+// Quits the application.
+export function Quit(): void;
+
+// [Hide](https://wails.io/docs/reference/runtime/intro#hide)
+// Hides the application.
+export function Hide(): void;
+
+// [Show](https://wails.io/docs/reference/runtime/intro#show)
+// Shows the application.
+export function Show(): void;
+
+// [ClipboardGetText](https://wails.io/docs/reference/runtime/clipboard#clipboardgettext)
+// Returns the current text stored on clipboard
+export function ClipboardGetText(): Promise<string>;
+
+// [ClipboardSetText](https://wails.io/docs/reference/runtime/clipboard#clipboardsettext)
+// Sets a text on the clipboard
+export function ClipboardSetText(text: string): Promise<boolean>;
+
+// [OnFileDrop](https://wails.io/docs/reference/runtime/draganddrop#onfiledrop)
+// OnFileDrop listens to drag and drop events and calls the callback with the coordinates of the drop and an array of path strings.
+export function OnFileDrop(callback: (x: number, y: number ,paths: string[]) => void, useDropTarget: boolean) :void
+
+// [OnFileDropOff](https://wails.io/docs/reference/runtime/draganddrop#dragandddropoff)
+// OnFileDropOff removes the drag and drop listeners and handlers.
+export function OnFileDropOff() :void
+
+// Check if the file path resolver is available
+export function CanResolveFilePaths(): boolean;
+
+// Resolves file paths for an array of files
+export function ResolveFilePaths(files: File[]): void
+
+// Notification types
+export interface NotificationOptions {
+    id: string;
+    title: string;
+    subtitle?: string; // macOS and Linux only
+    body?: string;
+    categoryId?: string;
+    data?: { [key: string]: any };
+}
+
+export interface NotificationAction {
+    id?: string;
+    title?: string;
+    destructive?: boolean; // macOS-specific
+}
+
+export interface NotificationCategory {
+    id?: string;
+    actions?: NotificationAction[];
+    hasReplyField?: boolean;
+    replyPlaceholder?: string;
+    replyButtonTitle?: string;
+}
+
+// [InitializeNotifications](https://wails.io/docs/reference/runtime/notification#initializenotifications)
+// Initializes the notification service for the application.
+// This must be called before sending any notifications.
+export function InitializeNotifications(): Promise<void>;
+
+// [CleanupNotifications](https://wails.io/docs/reference/runtime/notification#cleanupnotifications)
+// Cleans up notification resources and releases any held connections.
+export function CleanupNotifications(): Promise<void>;
+
+// [IsNotificationAvailable](https://wails.io/docs/reference/runtime/notification#isnotificationavailable)
+// Checks if notifications are available on the current platform.
+export function IsNotificationAvailable(): Promise<boolean>;
+
+// [RequestNotificationAuthorization](https://wails.io/docs/reference/runtime/notification#requestnotificationauthorization)
+// Requests notification authorization from the user (macOS only).
+export function RequestNotificationAuthorization(): Promise<boolean>;
+
+// [CheckNotificationAuthorization](https://wails.io/docs/reference/runtime/notification#checknotificationauthorization)
+// Checks the current notification authorization status (macOS only).
+export function CheckNotificationAuthorization(): Promise<boolean>;
+
+// [SendNotification](https://wails.io/docs/reference/runtime/notification#sendnotification)
+// Sends a basic notification with the given options.
+export function SendNotification(options: NotificationOptions): Promise<void>;
+
+// [SendNotificationWithActions](https://wails.io/docs/reference/runtime/notification#sendnotificationwithactions)
+// Sends a notification with action buttons. Requires a registered category.
+export function SendNotificationWithActions(options: NotificationOptions): Promise<void>;
+
+// [RegisterNotificationCategory](https://wails.io/docs/reference/runtime/notification#registernotificationcategory)
+// Registers a notification category that can be used with SendNotificationWithActions.
+export function RegisterNotificationCategory(category: NotificationCategory): Promise<void>;
+
+// [RemoveNotificationCategory](https://wails.io/docs/reference/runtime/notification#removenotificationcategory)
+// Removes a previously registered notification category.
+export function RemoveNotificationCategory(categoryId: string): Promise<void>;
+
+// [RemoveAllPendingNotifications](https://wails.io/docs/reference/runtime/notification#removeallpendingnotifications)
+// Removes all pending notifications from the notification center.
+export function RemoveAllPendingNotifications(): Promise<void>;
+
+// [RemovePendingNotification](https://wails.io/docs/reference/runtime/notification#removependingnotification)
+// Removes a specific pending notification by its identifier.
+export function RemovePendingNotification(identifier: string): Promise<void>;
+
+// [RemoveAllDeliveredNotifications](https://wails.io/docs/reference/runtime/notification#removealldeliverednotifications)
+// Removes all delivered notifications from the notification center.
+export function RemoveAllDeliveredNotifications(): Promise<void>;
+
+// [RemoveDeliveredNotification](https://wails.io/docs/reference/runtime/notification#removedeliverednotification)
+// Removes a specific delivered notification by its identifier.
+export function RemoveDeliveredNotification(identifier: string): Promise<void>;
+
+// [RemoveNotification](https://wails.io/docs/reference/runtime/notification#removenotification)
+// Removes a notification by its identifier (cross-platform convenience function).
+export function RemoveNotification(identifier: string): Promise<void>;
--- a/frontend/wailsjs/runtime/runtime.js
+++ b/frontend/wailsjs/runtime/runtime.js
@@ -0,0 +1,298 @@
+/*
+ _       __      _ __
+| |     / /___ _(_) /____
+| | /| / / __ `/ / / ___/
+| |/ |/ / /_/ / / (__  )
+|__/|__/\__,_/_/_/____/
+The electron alternative for Go
+(c) Lea Anthony 2019-present
+*/
+
+export function LogPrint(message) {
+    window.runtime.LogPrint(message);
+}
+
+export function LogTrace(message) {
+    window.runtime.LogTrace(message);
+}
+
+export function LogDebug(message) {
+    window.runtime.LogDebug(message);
+}
+
+export function LogInfo(message) {
+    window.runtime.LogInfo(message);
+}
+
+export function LogWarning(message) {
+    window.runtime.LogWarning(message);
+}
+
+export function LogError(message) {
+    window.runtime.LogError(message);
+}
+
+export function LogFatal(message) {
+    window.runtime.LogFatal(message);
+}
+
+export function EventsOnMultiple(eventName, callback, maxCallbacks) {
+    return window.runtime.EventsOnMultiple(eventName, callback, maxCallbacks);
+}
+
+export function EventsOn(eventName, callback) {
+    return EventsOnMultiple(eventName, callback, -1);
+}
+
+export function EventsOff(eventName, ...additionalEventNames) {
+    return window.runtime.EventsOff(eventName, ...additionalEventNames);
+}
+
+export function EventsOffAll() {
+  return window.runtime.EventsOffAll();
+}
+
+export function EventsOnce(eventName, callback) {
+    return EventsOnMultiple(eventName, callback, 1);
+}
+
+export function EventsEmit(eventName) {
+    let args = [eventName].slice.call(arguments);
+    return window.runtime.EventsEmit.apply(null, args);
+}
+
+export function WindowReload() {
+    window.runtime.WindowReload();
+}
+
+export function WindowReloadApp() {
+    window.runtime.WindowReloadApp();
+}
+
+export function WindowSetAlwaysOnTop(b) {
+    window.runtime.WindowSetAlwaysOnTop(b);
+}
+
+export function WindowSetSystemDefaultTheme() {
+    window.runtime.WindowSetSystemDefaultTheme();
+}
+
+export function WindowSetLightTheme() {
+    window.runtime.WindowSetLightTheme();
+}
+
+export function WindowSetDarkTheme() {
+    window.runtime.WindowSetDarkTheme();
+}
+
+export function WindowCenter() {
+    window.runtime.WindowCenter();
+}
+
+export function WindowSetTitle(title) {
+    window.runtime.WindowSetTitle(title);
+}
+
+export function WindowFullscreen() {
+    window.runtime.WindowFullscreen();
+}
+
+export function WindowUnfullscreen() {
+    window.runtime.WindowUnfullscreen();
+}
+
+export function WindowIsFullscreen() {
+    return window.runtime.WindowIsFullscreen();
+}
+
+export function WindowGetSize() {
+    return window.runtime.WindowGetSize();
+}
+
+export function WindowSetSize(width, height) {
+    window.runtime.WindowSetSize(width, height);
+}
+
+export function WindowSetMaxSize(width, height) {
+    window.runtime.WindowSetMaxSize(width, height);
+}
+
+export function WindowSetMinSize(width, height) {
+    window.runtime.WindowSetMinSize(width, height);
+}
+
+export function WindowSetPosition(x, y) {
+    window.runtime.WindowSetPosition(x, y);
+}
+
+export function WindowGetPosition() {
+    return window.runtime.WindowGetPosition();
+}
+
+export function WindowHide() {
+    window.runtime.WindowHide();
+}
+
+export function WindowShow() {
+    window.runtime.WindowShow();
+}
+
+export function WindowMaximise() {
+    window.runtime.WindowMaximise();
+}
+
+export function WindowToggleMaximise() {
+    window.runtime.WindowToggleMaximise();
+}
+
+export function WindowUnmaximise() {
+    window.runtime.WindowUnmaximise();
+}
+
+export function WindowIsMaximised() {
+    return window.runtime.WindowIsMaximised();
+}
+
+export function WindowMinimise() {
+    window.runtime.WindowMinimise();
+}
+
+export function WindowUnminimise() {
+    window.runtime.WindowUnminimise();
+}
+
+export function WindowSetBackgroundColour(R, G, B, A) {
+    window.runtime.WindowSetBackgroundColour(R, G, B, A);
+}
+
+export function ScreenGetAll() {
+    return window.runtime.ScreenGetAll();
+}
+
+export function WindowIsMinimised() {
+    return window.runtime.WindowIsMinimised();
+}
+
+export function WindowIsNormal() {
+    return window.runtime.WindowIsNormal();
+}
+
+export function BrowserOpenURL(url) {
+    window.runtime.BrowserOpenURL(url);
+}
+
+export function Environment() {
+    return window.runtime.Environment();
+}
+
+export function Quit() {
+    window.runtime.Quit();
+}
+
+export function Hide() {
+    window.runtime.Hide();
+}
+
+export function Show() {
+    window.runtime.Show();
+}
+
+export function ClipboardGetText() {
+    return window.runtime.ClipboardGetText();
+}
+
+export function ClipboardSetText(text) {
+    return window.runtime.ClipboardSetText(text);
+}
+
+/**
+ * Callback for OnFileDrop returns a slice of file path strings when a drop is finished.
+ *
+ * @export
+ * @callback OnFileDropCallback
+ * @param {number} x - x coordinate of the drop
+ * @param {number} y - y coordinate of the drop
+ * @param {string[]} paths - A list of file paths.
+ */
+
+/**
+ * OnFileDrop listens to drag and drop events and calls the callback with the coordinates of the drop and an array of path strings.
+ *
+ * @export
+ * @param {OnFileDropCallback} callback - Callback for OnFileDrop returns a slice of file path strings when a drop is finished.
+ * @param {boolean} [useDropTarget=true] - Only call the callback when the drop finished on an element that has the drop target style. (--wails-drop-target)
+ */
+export function OnFileDrop(callback, useDropTarget) {
+    return window.runtime.OnFileDrop(callback, useDropTarget);
+}
+
+/**
+ * OnFileDropOff removes the drag and drop listeners and handlers.
+ */
+export function OnFileDropOff() {
+    return window.runtime.OnFileDropOff();
+}
+
+export function CanResolveFilePaths() {
+    return window.runtime.CanResolveFilePaths();
+}
+
+export function ResolveFilePaths(files) {
+    return window.runtime.ResolveFilePaths(files);
+}
+
+export function InitializeNotifications() {
+    return window.runtime.InitializeNotifications();
+}
+
+export function CleanupNotifications() {
+    return window.runtime.CleanupNotifications();
+}
+
+export function IsNotificationAvailable() {
+    return window.runtime.IsNotificationAvailable();
+}
+
+export function RequestNotificationAuthorization() {
+    return window.runtime.RequestNotificationAuthorization();
+}
+
+export function CheckNotificationAuthorization() {
+    return window.runtime.CheckNotificationAuthorization();
+}
+
+export function SendNotification(options) {
+    return window.runtime.SendNotification(options);
+}
+
+export function SendNotificationWithActions(options) {
+    return window.runtime.SendNotificationWithActions(options);
+}
+
+export function RegisterNotificationCategory(category) {
+    return window.runtime.RegisterNotificationCategory(category);
+}
+
+export function RemoveNotificationCategory(categoryId) {
+    return window.runtime.RemoveNotificationCategory(categoryId);
+}
+
+export function RemoveAllPendingNotifications() {
+    return window.runtime.RemoveAllPendingNotifications();
+}
+
+export function RemovePendingNotification(identifier) {
+    return window.runtime.RemovePendingNotification(identifier);
+}
+
+export function RemoveAllDeliveredNotifications() {
+    return window.runtime.RemoveAllDeliveredNotifications();
+}
+
+export function RemoveDeliveredNotification(identifier) {
+    return window.runtime.RemoveDeliveredNotification(identifier);
+}
+
+export function RemoveNotification(identifier) {
+    return window.runtime.RemoveNotification(identifier);
+}
--- a/go.mod
+++ b/go.mod
@@ -0,0 +1,44 @@
+module field-sync-gui
+
+go 1.23.0
+
+require (
+	github.com/joho/godotenv v1.5.1
+	github.com/shirou/gopsutil/v3 v3.24.5
+	github.com/wailsapp/wails/v2 v2.12.0
+)
+
+require (
+	git.sr.ht/~jackmordaunt/go-toast/v2 v2.0.3 // indirect
+	github.com/bep/debounce v1.2.1 // indirect
+	github.com/go-ole/go-ole v1.3.0 // indirect
+	github.com/godbus/dbus/v5 v5.1.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/gorilla/websocket v1.5.3 // indirect
+	github.com/jchv/go-winloader v0.0.0-20210711035445-715c2860da7e // indirect
+	github.com/labstack/echo/v4 v4.13.3 // indirect
+	github.com/labstack/gommon v0.4.2 // indirect
+	github.com/leaanthony/go-ansi-parser v1.6.1 // indirect
+	github.com/leaanthony/gosod v1.0.4 // indirect
+	github.com/leaanthony/slicer v1.6.0 // indirect
+	github.com/leaanthony/u v1.1.1 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/samber/lo v1.49.1 // indirect
+	github.com/tkrajina/go-reflector v0.5.8 // indirect
+	github.com/valyala/bytebufferpool v1.0.0 // indirect
+	github.com/valyala/fasttemplate v1.2.2 // indirect
+	github.com/wailsapp/go-webview2 v1.0.22 // indirect
+	github.com/wailsapp/mimetype v1.4.1 // indirect
+	github.com/yusufpapurcu/wmi v1.2.4 // indirect
+	golang.org/x/crypto v0.33.0 // indirect
+	golang.org/x/net v0.35.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
+	golang.org/x/text v0.22.0 // indirect
+)
+
+// replace github.com/wailsapp/wails/v2 v2.12.0 => /home/floppyrj45/go/pkg/mod
--- a/go.sum
+++ b/go.sum
@@ -0,0 +1,94 @@
+git.sr.ht/~jackmordaunt/go-toast/v2 v2.0.3 h1:N3IGoHHp9pb6mj1cbXbuaSXV/UMKwmbKLf53nQmtqMA=
+git.sr.ht/~jackmordaunt/go-toast/v2 v2.0.3/go.mod h1:QtOLZGz8olr4qH2vWK0QH0w0O4T9fEIjMuWpKUsH7nc=
+github.com/bep/debounce v1.2.1 h1:v67fRdBA9UQu2NhLFXrSg0Brw7CexQekrBwDMM8bzeY=
+github.com/bep/debounce v1.2.1/go.mod h1:H8yggRPQKLUhUoqrJC1bO2xNya7vanpDl7xR3ISbCJ0=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
+github.com/go-ole/go-ole v1.3.0 h1:Dt6ye7+vXGIKZ7Xtk4s6/xVdGDQynvom7xCFEdWr6uE=
+github.com/go-ole/go-ole v1.3.0/go.mod h1:5LS6F96DhAwUc7C+1HLexzMXY1xGRSryjyPPKW6zv78=
+github.com/godbus/dbus/v5 v5.1.0 h1:4KLkAxT3aOY8Li4FRJe/KvhoNFFxo0m6fNuFUO8QJUk=
+github.com/godbus/dbus/v5 v5.1.0/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
+github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/jchv/go-winloader v0.0.0-20210711035445-715c2860da7e h1:Q3+PugElBCf4PFpxhErSzU3/PY5sFL5Z6rfv4AbGAck=
+github.com/jchv/go-winloader v0.0.0-20210711035445-715c2860da7e/go.mod h1:alcuEEnZsY1WQsagKhZDsoPCRoOijYqhZvPwLG0kzVs=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
+github.com/labstack/echo/v4 v4.13.3 h1:pwhpCPrTl5qry5HRdM5FwdXnhXSLSY+WE+YQSeCaafY=
+github.com/labstack/echo/v4 v4.13.3/go.mod h1:o90YNEeQWjDozo584l7AwhJMHN0bOC4tAfg+Xox9q5g=
+github.com/labstack/gommon v0.4.2 h1:F8qTUNXgG1+6WQmqoUWnz8WiEU60mXVVw0P4ht1WRA0=
+github.com/labstack/gommon v0.4.2/go.mod h1:QlUFxVM+SNXhDL/Z7YhocGIBYOiwB0mXm1+1bAPHPyU=
+github.com/leaanthony/debme v1.2.1 h1:9Tgwf+kjcrbMQ4WnPcEIUcQuIZYqdWftzZkBr+i/oOc=
+github.com/leaanthony/debme v1.2.1/go.mod h1:3V+sCm5tYAgQymvSOfYQ5Xx2JCr+OXiD9Jkw3otUjiA=
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--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -0,0 +1,42 @@
+package config
+
+import (
+	"os"
+	"strconv"
+
+	"github.com/joho/godotenv"
+)
+
+// Config holds runtime configuration
+type Config struct {
+	S3Bucket    string `json:"s3Bucket"`
+	LocalDest   string `json:"localDest"`
+	AWSProfile  string `json:"awsProfile"`
+	Concurrency int    `json:"concurrency"`
+}
+
+// Load reads config from ENV (with optional .env file)
+func Load(envFile string) Config {
+	_ = godotenv.Load(envFile) // ignore if missing
+
+	concurrency := 4
+	if v := os.Getenv("FIELD_SYNC_CONCURRENCY"); v != "" {
+		if n, err := strconv.Atoi(v); err == nil && n > 0 {
+			concurrency = n
+		}
+	}
+
+	return Config{
+		S3Bucket:    getenv("FIELD_SYNC_S3_BUCKET", ""),
+		LocalDest:   getenv("FIELD_SYNC_LOCAL_DEST", os.TempDir()),
+		AWSProfile:  getenv("AWS_PROFILE", "cosma"),
+		Concurrency: concurrency,
+	}
+}
+
+func getenv(key, fallback string) string {
+	if v := os.Getenv(key); v != "" {
+		return v
+	}
+	return fallback
+}
--- a/internal/copier/copier.go
+++ b/internal/copier/copier.go
@@ -0,0 +1,163 @@
+package copier
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+	"sync"
+	"time"
+)
+
+const maxRetries = 3
+
+// FileJob represents one file to copy
+type FileJob struct {
+	Source    string
+	LocalDest string
+	S3Bucket  string
+	S3Key     string
+	AWSProfile string
+}
+
+// FileResult is the result of copying one file
+type FileResult struct {
+	Job    FileJob
+	SHA256 string
+	Bytes  int64
+	Error  error
+}
+
+// ProgressFn is called with (bytesCopied, totalBytes) during local copy
+type ProgressFn func(n int64, total int64)
+
+// CopyLocal copies src to dst, returns sha256 and bytes written
+func CopyLocal(src, dst string, progress ProgressFn) (string, int64, error) {
+	if err := os.MkdirAll(filepath.Dir(dst), 0755); err != nil {
+		return "", 0, err
+	}
+
+	in, err := os.Open(src)
+	if err != nil {
+		return "", 0, err
+	}
+	defer in.Close()
+
+	info, err := in.Stat()
+	if err != nil {
+		return "", 0, err
+	}
+	total := info.Size()
+
+	out, err := os.Create(dst)
+	if err != nil {
+		return "", 0, err
+	}
+	defer out.Close()
+
+	h := sha256.New()
+	var written int64
+	buf := make([]byte, 1<<20) // 1MB buffer
+	for {
+		nr, er := in.Read(buf)
+		if nr > 0 {
+			nw, ew := out.Write(buf[:nr])
+			if nw > 0 {
+				written += int64(nw)
+				h.Write(buf[:nw])
+				if progress != nil {
+					progress(written, total)
+				}
+			}
+			if ew != nil {
+				return "", written, ew
+			}
+		}
+		if er == io.EOF {
+			break
+		}
+		if er != nil {
+			return "", written, er
+		}
+	}
+
+	return hex.EncodeToString(h.Sum(nil)), written, nil
+}
+
+// CopyS3 uploads localPath to s3://bucket/key via s5cmd
+func CopyS3(ctx context.Context, localPath, bucket, key, awsProfile string) error {
+	s3uri := fmt.Sprintf("s3://%s/%s", bucket, key)
+	for attempt := 0; attempt < maxRetries; attempt++ {
+		if attempt > 0 {
+			wait := time.Duration(1<<attempt) * time.Second
+			select {
+			case <-ctx.Done():
+				return ctx.Err()
+			case <-time.After(wait):
+			}
+		}
+
+		args := []string{"cp", "--concurrency", "8", localPath, s3uri}
+		cmd := exec.CommandContext(ctx, "s5cmd", args...)
+		if awsProfile != "" {
+			cmd.Env = append(os.Environ(), "AWS_PROFILE="+awsProfile)
+		}
+		out, err := cmd.CombinedOutput()
+		if err == nil {
+			return nil
+		}
+		if strings.Contains(string(out), "NoSuchBucket") {
+			return fmt.Errorf("bucket not found: %s", bucket)
+		}
+	}
+	return fmt.Errorf("s5cmd failed after %d retries", maxRetries)
+}
+
+// Pool runs file copy jobs with worker concurrency
+type Pool struct {
+	Workers int
+	OnResult func(FileResult)
+}
+
+// Run processes jobs from the jobs channel until closed or ctx is done
+func (p *Pool) Run(ctx context.Context, jobs <-chan FileJob) {
+	var wg sync.WaitGroup
+	for i := 0; i < p.Workers; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for job := range jobs {
+				select {
+				case <-ctx.Done():
+					return
+				default:
+				}
+				result := p.processJob(ctx, job)
+				if p.OnResult != nil {
+					p.OnResult(result)
+				}
+			}
+		}()
+	}
+	wg.Wait()
+}
+
+func (p *Pool) processJob(ctx context.Context, job FileJob) FileResult {
+	sha, bytes, err := CopyLocal(job.Source, job.LocalDest, nil)
+	if err != nil {
+		return FileResult{Job: job, Error: fmt.Errorf("local copy: %w", err)}
+	}
+
+	if job.S3Bucket != "" {
+		if err := CopyS3(ctx, job.LocalDest, job.S3Bucket, job.S3Key, job.AWSProfile); err != nil {
+			return FileResult{Job: job, SHA256: sha, Bytes: bytes, Error: fmt.Errorf("s3: %w", err)}
+		}
+	}
+
+	return FileResult{Job: job, SHA256: sha, Bytes: bytes}
+}
--- a/internal/detect/detect.go
+++ b/internal/detect/detect.go
@@ -0,0 +1,75 @@
+package detect
+
+import (
+	"path/filepath"
+	"strings"
+
+	"github.com/shirou/gopsutil/v3/disk"
+)
+
+// SDCard represents a detected removable storage device
+type SDCard struct {
+	Mountpoint string   `json:"mountpoint"`
+	Label      string   `json:"label"`
+	Device     string   `json:"device"`
+	Fstype     string   `json:"fstype"`
+	TotalBytes uint64   `json:"totalBytes"`
+	FreeBytes  uint64   `json:"freeBytes"`
+	MediaFiles []string `json:"mediaFiles"`
+}
+
+// mediaExtensions is the set of file extensions we care about
+var mediaExtensions = map[string]bool{
+	".mp4": true, ".mov": true, ".jpg": true, ".jpeg": true,
+	".png": true, ".raw": true, ".gpr": true, ".360": true,
+	".lrv": true, ".thm": true,
+}
+
+// Detect returns all removable partitions that look like SD cards / media
+func Detect() []SDCard {
+	partitions, err := disk.Partitions(true)
+	if err != nil {
+		return nil
+	}
+
+	var cards []SDCard
+	for _, p := range partitions {
+		if !isRemovable(p) {
+			continue
+		}
+		usage, err := disk.Usage(p.Mountpoint)
+		if err != nil {
+			continue
+		}
+		card := SDCard{
+			Mountpoint: p.Mountpoint,
+			Label:      filepath.Base(p.Mountpoint),
+			Device:     p.Device,
+			Fstype:     p.Fstype,
+			TotalBytes: usage.Total,
+			FreeBytes:  usage.Free,
+		}
+		cards = append(cards, card)
+	}
+	return cards
+}
+
+// isRemovable heuristic: opts contain "removable" or path looks like /media/
+func isRemovable(p disk.PartitionStat) bool {
+	opts := strings.Join(p.Opts, ",")
+	if strings.Contains(opts, "removable") {
+		return true
+	}
+	mp := p.Mountpoint
+	if strings.HasPrefix(mp, "/media/") || strings.HasPrefix(mp, "/run/media/") ||
+		strings.HasPrefix(mp, "/Volumes/") || strings.HasPrefix(mp, "/mnt/sd") {
+		return true
+	}
+	return false
+}
+
+// HasMediaExtension returns true if path has a known media extension
+func HasMediaExtension(path string) bool {
+	ext := strings.ToLower(filepath.Ext(path))
+	return mediaExtensions[ext]
+}
--- a/internal/detect/detect_test.go
+++ b/internal/detect/detect_test.go
@@ -0,0 +1,25 @@
+package detect
+
+import "testing"
+
+func TestDetectNoPanic(t *testing.T) {
+	cards := Detect()
+	// May be empty in CI — just verify no panic
+	_ = cards
+}
+
+func TestHasMediaExtension(t *testing.T) {
+	cases := map[string]bool{
+		"clip.mp4":  true,
+		"photo.JPG": true,
+		"photo.raw": true,
+		"file.txt":  false,
+		"archive.zip": false,
+	}
+	for path, want := range cases {
+		got := HasMediaExtension(path)
+		if got != want {
+			t.Errorf("HasMediaExtension(%q) = %v, want %v", path, got, want)
+		}
+	}
+}
--- a/internal/manifest/manifest.go
+++ b/internal/manifest/manifest.go
@@ -0,0 +1,67 @@
+package manifest
+
+import (
+	"encoding/json"
+	"os"
+	"sync"
+)
+
+// Entry is one copied file record
+type Entry struct {
+	Source    string `json:"source"`
+	LocalDest string `json:"localDest"`
+	S3Path    string `json:"s3Path,omitempty"`
+	SHA256    string `json:"sha256"`
+	Bytes     int64  `json:"bytes"`
+	Status    string `json:"status"` // "local" | "s3" | "done" | "error"
+	Error     string `json:"error,omitempty"`
+}
+
+// Manifest holds all entries for a session
+type Manifest struct {
+	SessionID string  `json:"sessionID"`
+	Entries   []Entry `json:"entries"`
+	mu        sync.Mutex
+}
+
+// New creates a new manifest
+func New(sessionID string) *Manifest {
+	return &Manifest{SessionID: sessionID}
+}
+
+// Append adds an entry atomically
+func (m *Manifest) Append(e Entry) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	m.Entries = append(m.Entries, e)
+}
+
+// Save writes manifest atomically via temp file + rename
+func (m *Manifest) Save(path string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	data, err := json.MarshalIndent(m, "", "  ")
+	if err != nil {
+		return err
+	}
+
+	tmp := path + ".tmp"
+	if err := os.WriteFile(tmp, data, 0644); err != nil {
+		return err
+	}
+	return os.Rename(tmp, path)
+}
+
+// Load reads a manifest from disk
+func Load(path string) (*Manifest, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	var m Manifest
+	if err := json.Unmarshal(data, &m); err != nil {
+		return nil, err
+	}
+	return &m, nil
+}
--- a/main.go
+++ b/main.go
@@ -0,0 +1,36 @@
+package main
+
+import (
+	"embed"
+
+	"github.com/wailsapp/wails/v2"
+	"github.com/wailsapp/wails/v2/pkg/options"
+	"github.com/wailsapp/wails/v2/pkg/options/assetserver"
+)
+
+//go:embed all:frontend/dist
+var assets embed.FS
+
+func main() {
+	// Create an instance of the app structure
+	app := NewApp()
+
+	// Create application with options
+	err := wails.Run(&options.App{
+		Title:  "field-sync-gui",
+		Width:  1024,
+		Height: 768,
+		AssetServer: &assetserver.Options{
+			Assets: assets,
+		},
+		BackgroundColour: &options.RGBA{R: 27, G: 38, B: 54, A: 1},
+		OnStartup:        app.startup,
+		Bind: []interface{}{
+			app,
+		},
+	})
+
+	if err != nil {
+		println("Error:", err.Error())
+	}
+}
--- a/wails.json
+++ b/wails.json
@@ -0,0 +1,13 @@
+{
+  "$schema": "https://wails.io/schemas/config.v2.json",
+  "name": "field-sync-gui",
+  "outputfilename": "field-sync-gui",
+  "frontend:install": "npm install",
+  "frontend:build": "npm run build",
+  "frontend:dev:watcher": "npm run dev",
+  "frontend:dev:serverUrl": "auto",
+  "author": {
+    "name": "Poulpe",
+    "email": "poulpe@nowyouknow.fr"
+  }
+}