Bump version to 1.0.58

- Check if checksum column exists before querying it
- For old DBs (no checksum col): use COUNT(*) to check if migration applied
- For new DBs (has checksum col): use checksum value
- All migrations run in a single transaction

.opencode/plans/revert-runremote.md

@@ -0,0 +1,173 @@
+# Revertir RunRemote a approach SSH-a-source sin envío base64
+
+## Estado
+
+Estamos en plan mode (READ-ONLY). Los cambios de código Go están bloqueados. Este documento describe los cambios necesarios para proceder cuando salgamos de plan mode.
+
+## Contexto
+
+Las claves SSH ya están pre-instaladas en cada máquina:
+
+| Máquina | Clave instalada | Pública autorizada en |
+|---|---|---|
+| Baby NAS (10.5.1.20) | `/var/lib/syncserver/ssh/keys/qnap.key` (OpenSSH nativo, 387 bytes) | qnap.key.pub ya en Qnap `/mnt/HDA_ROOT/.config/ssh/authorized_keys` |
+| Qnap (10.5.0.144) | n/a (server) | baby-nas.key.pub ya en Baby NAS `/root/.ssh/authorized_keys` |
+| Baby NAS known_hosts | `/var/lib/syncserver/ssh/known_hosts` (3 host keys de Qnap en formato hashed) | — |
+
+Test crítico exitoso:
+```
+ssh -i /var/lib/syncserver/ssh/keys/baby-nas.key root@10.5.1.20 \
+    "ssh -i /var/lib/syncserver/ssh/keys/qnap.key -o StrictHostKeyChecking=yes \
+     admin@10.5.0.144 echo QNAP-FROM-BABY"
+→ QNAP-FROM-BABY (exit 0)
+```
+
+## Cambios pendientes
+
+### 1. `internal/syncengine/rsync_runner.go`
+
+**Eliminar** la función `buildWrapperScript` (líneas 86-101 del archivo actual).
+
+**Reemplazar** la función `RunRemote` actual con la versión SSH-a-source:
+
+```go
+func (r *RsyncRunner) RunRemote(ctx context.Context, pair *SyncPairConfig, src *MachineKeys, dst *MachineKeys, destKey string, onLine func(stream string, line string)) (*RsyncResult, error) {
+	if src.Port == 0 {
+		src.Port = 22
+	}
+	if src.PrivKey == "" {
+		src.PrivKey = filepath.Join(r.sshDir, "id_ed25519")
+	}
+	if destKey == "" {
+		destKey = filepath.Join(r.sshDir, "id_ed25519")
+	}
+
+	destUserHost := fmt.Sprintf("%s@%s", dst.SSHUser, dst.Host)
+	args := r.buildArgs(pair)
+
+	innerSSH := fmt.Sprintf("ssh -i %s -o StrictHostKeyChecking=accept-new -o UserKnownHostsFile=%s",
+		destKey, filepath.Join(r.sshDir, "known_hosts"))
+	rsyncFlags := strings.Join(args[:len(args)-2], " ")
+	sourcePath := args[len(args)-2]
+	destPath := args[len(args)-1]
+
+	remoteCmd := fmt.Sprintf("rsync %s -e %q %s %s",
+		rsyncFlags, innerSSH, sourcePath, destUserHost+":"+destPath)
+
+	sshArgs := []string{
+		"-i", src.PrivKey,
+		"-o", "StrictHostKeyChecking=accept-new",
+		"-o", "UserKnownHostsFile=" + filepath.Join(r.sshDir, "known_hosts"),
+		"-p", fmt.Sprintf("%d", src.Port),
+		fmt.Sprintf("%s@%s", src.SSHUser, src.Host),
+	}
+	sshArgs = append(sshArgs, remoteCmd)
+
+	cmd := exec.CommandContext(ctx, "ssh", sshArgs...)
+	return r.runCmd(ctx, cmd, onLine)
+}
+```
+
+**Modificar** el struct `MachineKeys` para agregar `SSHUser`:
+
+```go
+type MachineKeys struct {
+	Host    string
+	Port    int
+	User    string
+	SSHUser string
+	PrivKey string
+}
+```
+
+### 2. `internal/syncengine/engine.go`
+
+Actualizar la llamada a `RunRemote` (líneas 263-283 actuales) para usar la nueva firma con `destPrivKeyPath` como argumento separado:
+
+```go
+if isRemoteToRemote(srcMachine, dstMachine) {
+	destPrivKeyPath, err := e.resolveSSHKey(dstMachine)
+	if err != nil {
+		slog.Warn("failed to resolve destination SSH key, using server key", "error", err)
+		destPrivKeyPath = ""
+	}
+	result, err = runner.RunRemote(jobCtx, cfg,
+		&syncengine.MachineKeys{
+			Host:    srcMachine.Host,
+			Port:    srcMachine.Port,
+			User:    srcMachine.SSHUser,
+			SSHUser: srcMachine.SSHUser,
+			PrivKey: privKey,
+		},
+		&syncengine.MachineKeys{
+			Host:    dstMachine.Host,
+			Port:    dstMachine.Port,
+			User:    dstMachine.SSHUser,
+			SSHUser: dstMachine.SSHUser,
+			PrivKey: destPrivKeyPath,
+		},
+		destPrivKeyPath,
+		onLine)
+}
+```
+
+### 3. Build y deploy
+
+```bash
+go build ./cmd/server
+make clean && make package
+./scripts/bump-version.sh  # bump a 1.0.28
+git add -f cmd/server/main.go Makefile internal/syncengine/
+git commit -m "fix: RunRemote uses SSH-to-source, dest key pre-installed on source"
+git push
+
+# Deploy manual:
+scp dist/syncserver_1.0.28_amd64.deb root@10.5.1.30:/root/move-data-nas/dist/
+ssh root@10.5.1.30 "cd /root/move-data-nas && dpkg -i dist/syncserver_1.0.28_amd64.deb"
+```
+
+### 4. Test
+
+Trigger job 23 desde UI o via API. Verificar en DB:
+```bash
+ssh root@10.5.1.30 'sqlite3 /var/lib/syncserver/app.db \
+  "SELECT id, status, error_code, substr(error_message,1,200) FROM jobs WHERE id=24;"'
+```
+
+Esperado: `status=success`, `error_code=NULL`, `error_message=NULL`.
+
+## Por qué este approach funciona
+
+Antes:
+- LXC SSH a Baby NAS
+- Baby NAS ejecuta `echo 'BASE64' | base64 -d > /tmp/syncserver-dest-key && rsync ...`
+- El base64 round-trip generaba archivo corrupto o vacío
+- Baby NAS OpenSSH 8.9 no podía parsear el formato PKCS8
+
+Ahora:
+- LXC SSH a Baby NAS (usa baby-nas.key)
+- Baby NAS ejecuta `rsync -e ssh -i /var/lib/syncserver/ssh/keys/qnap.key ...`
+- qnap.key YA está en Baby NAS en formato OpenSSH nativo (parseable por 8.9)
+- Host key de Qnap YA está en known_hosts de Baby NAS (no prompt)
+- Pública de qnap.key YA está en authorized_keys de Qnap (auth pasa)
+
+## Comportamiento esperado
+
+```
+job started job_id=24 pair=Peliculas
+ssh -i baby-nas.key root@10.5.1.20 'rsync -aP -e "ssh -i qnap.key -o StrictHostKeyChecking=accept-new -o UserKnownHostsFile=..." /mnt/storage/multimedia/peliculas admin@10.5.0.144:/share/media/peliculas'
+sending incremental file list
+...
+sent X bytes  received Y bytes  Z bytes/sec
+total size is T  speedup is S
+job completed job_id=24 pair=Peliculas
+```
+
+## Si falla
+
+| Error | Causa | Fix |
+|---|---|---|
+| Load key invalid format | clave corrupta en Baby NAS | re-copiar qnap.key |
+| Permission denied (publickey) | pública no está en Qnap | re-agregar a authorized_keys |
+| Host key verification failed | known_hosts desincronizado | re-correr ssh-keyscan |
+| Connection timed out | problema L2/L3 real (no era el caso) | investigar red |

Makefile

@@ -1,5 +1,5 @@
 BINARY=syncserver
-VERSION?=1.0.23
+VERSION?=1.0.58
 GO?=go
 LDFLAGS=-s -w -X main.version=$(VERSION) -X main.commit=$(shell git rev-parse --short HEAD 2>/dev/null || echo unknown)
 BUILD_FLAGS=CGO_ENABLED=0

cmd/server/main.go

@@ -20,7 +20,7 @@ import (
 	"github.com/syncserver/internal/syncengine"
 )
 
-var version = "1.0.23"
+var version = "1.0.58"
 
 func main() {
 	cfgPath := flag.String("config", "", "Path to config.yaml")

internal/api/dto.go

@@ -11,6 +11,7 @@ type MachineRequest struct {
 	BroadcastAddr               *string `json:"broadcast_addr"`
 	WakeTimeoutSeconds          int     `json:"wake_timeout_seconds"`
 	WakeCheckIntervalSeconds    int     `json:"wake_check_interval_seconds"`
+	ShutdownCommand             string  `json:"shutdown_command,omitempty"`
 }
 
 type MachineResponse struct {
@@ -28,6 +29,9 @@ type MachineResponse struct {
 	FingerprintConfirmed        bool    `json:"fingerprint_confirmed"`
 	HostKeyFingerprint         *string `json:"host_key_fingerprint"`
 	Status                      string  `json:"status"`
+	LastSeenAt                  *string `json:"last_seen_at"`
+	CreatedAt                   string  `json:"created_at"`
+	ShutdownCommand             string  `json:"shutdown_command"`
 }
 
 type TestConnectionResponse struct {
@@ -37,6 +41,12 @@ type TestConnectionResponse struct {
 	Fingerprint string  `json:"fingerprint,omitempty"`
 }
 
+type ShutdownResponse struct {
+	Success bool   `json:"success"`
+	Output  string `json:"output,omitempty"`
+	Error   string `json:"error,omitempty"`
+}
+
 type SyncPairRequest struct {
 	Name            string  `json:"name"`
 	SourceMachineID *int64  `json:"source_machine_id"`
@@ -74,6 +84,8 @@ type JobResponse struct {
 	ErrorCode        *string `json:"error_code,omitempty"`
 	DurationSeconds  *int64  `json:"duration_seconds,omitempty"`
 	LogLineCount     *int64  `json:"log_line_count,omitempty"`
+	TotalSizeBytes  *int64  `json:"total_size_bytes,omitempty"`
+	SentBytes        *int64  `json:"sent_bytes,omitempty"`
 }
 
 type LogLineResponse struct {
@@ -109,3 +121,24 @@ type SettingsInfoResponse struct {
 	DataDir   string `json:"data_dir"`
 	SSHPubKey string `json:"ssh_pub_key"`
 }
+
+type CreateScheduleRequest struct {
+	SyncPairID int64  `json:"sync_pair_id"`
+	CronExpr   string `json:"cron_expr"`
+	Enabled    bool   `json:"enabled"`
+}
+
+type UpdateScheduleRequest struct {
+	CronExpr string `json:"cron_expr"`
+	Enabled  bool   `json:"enabled"`
+}
+
+type ScheduleResponse struct {
+	ID           int64   `json:"id"`
+	SyncPairID   int64   `json:"sync_pair_id"`
+	SyncPairName string  `json:"sync_pair_name"`
+	CronExpr     string  `json:"cron_expr"`
+	NextRun      *string `json:"next_run_at"`
+	Enabled      bool    `json:"enabled"`
+	CreatedAt    string  `json:"created_at"`
+}

internal/api/handlers_jobs.go

@@ -128,7 +128,7 @@ func (h *JobHandler) Cancel(w http.ResponseWriter, r *http.Request) {
 	}
 
 	if h.engine != nil {
-		h.engine.Cancel(id, j.SyncPairID, true)
+		h.engine.Cancel(id, true)
 	}
 
 	repo.UpdateStatus(id, "cancelled")
@@ -254,6 +254,12 @@ func jobToResp(j models.Job) JobResponse {
 		s := j.FinishedAt.Format(time.RFC3339)
 		resp.FinishedAt = &s
 	}
+	if j.TotalSizeBytes > 0 {
+		resp.TotalSizeBytes = &j.TotalSizeBytes
+	}
+	if j.SentBytes > 0 {
+		resp.SentBytes = &j.SentBytes
+	}
 	return resp
 }
 

internal/api/handlers_machines.go

@@ -4,14 +4,18 @@ import (
 	"context"
 	"database/sql"
 	"encoding/json"
+	"fmt"
 	"log/slog"
 	"net/http"
+	"strings"
 	"path/filepath"
 	"regexp"
 	"strconv"
 	"time"
 
 	"github.com/go-chi/chi/v5"
+	"github.com/syncserver/internal/config"
+	"golang.org/x/crypto/ssh"
 	"github.com/syncserver/internal/models"
 	"github.com/syncserver/internal/sshmanager"
 	"github.com/syncserver/internal/syncengine"
@@ -21,10 +25,11 @@ import (
 type MachineHandler struct {
 	db     *sql.DB
 	engine *syncengine.Engine
+	cfg    *config.Config
 }
 
-func NewMachineHandler(db *sql.DB, engine *syncengine.Engine) *MachineHandler {
-	return &MachineHandler{db: db, engine: engine}
+func NewMachineHandler(db *sql.DB, engine *syncengine.Engine, cfg *config.Config) *MachineHandler {
+	return &MachineHandler{db: db, engine: engine, cfg: cfg}
 }
 
 var macRegex = regexp.MustCompile(`^([0-9A-Fa-f]{2}[:-]){5}[0-9A-Fa-f]{2}$`)
@@ -93,6 +98,10 @@ func (h *MachineHandler) Create(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	shutdownCmd := req.ShutdownCommand
+	if shutdownCmd == "" {
+		shutdownCmd = "shutdown now"
+	}
 	m := &models.Machine{
 		Name:                        req.Name,
 		Host:                        req.Host,
@@ -106,6 +115,7 @@ func (h *MachineHandler) Create(w http.ResponseWriter, r *http.Request) {
 		WakeCheckIntervalSeconds:    req.WakeCheckIntervalSeconds,
 		FingerprintConfirmed:        false,
 		Status:                      "unknown",
+		ShutdownCommand:             shutdownCmd,
 	}
 
 	repo := models.NewMachineRepository(h.db)
@@ -175,6 +185,9 @@ func (h *MachineHandler) Update(w http.ResponseWriter, r *http.Request) {
 	if req.WakeCheckIntervalSeconds > 0 {
 		existing.WakeCheckIntervalSeconds = req.WakeCheckIntervalSeconds
 	}
+	if req.ShutdownCommand != "" {
+		existing.ShutdownCommand = req.ShutdownCommand
+	}
 
 	if err := repo.Update(existing); err != nil {
 		slog.Error("failed to update machine", "id", id, "error", err)
@@ -221,6 +234,87 @@ func (h *MachineHandler) TestWoL(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, map[string]interface{}{"ok": true, "sent": 3})
 }
 
+func (h *MachineHandler) Shutdown(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.ParseInt(chi.URLParam(r, "id"), 10, 64)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid id")
+		return
+	}
+	repo := models.NewMachineRepository(h.db)
+	m, err := repo.GetByID(id)
+	if err == sql.ErrNoRows {
+		writeError(w, http.StatusNotFound, "machine not found")
+		return
+	}
+	if err != nil {
+		slog.Error("failed to fetch machine", "id", id, "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to fetch machine")
+		return
+	}
+
+	knownHostsPath, err := sshmanager.EnsureKnownHosts(h.cfg.SSHDir())
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "failed to ensure known_hosts")
+		return
+	}
+
+	privKeyPath := filepath.Join(h.cfg.SSHDir(), "id_ed25519")
+	if m.SSHKeyID != nil {
+		sshKeyRepo := models.NewSSHKeyRepository(h.db)
+		sshKey, err := sshKeyRepo.GetByID(*m.SSHKeyID)
+		if err == nil && sshKey.PrivateKeyPath != "" {
+			privKeyPath = sshKey.PrivateKeyPath
+		}
+	}
+
+	cmd := m.ShutdownCommand
+	if cmd == "" {
+		cmd = "shutdown now"
+	}
+
+	slog.Info("shutdown requested", "machine_id", id, "name", m.Name, "command", cmd)
+	result, err := sshmanager.RunRemoteCommand(
+		context.Background(), m.Host, m.Port, m.SSHUser,
+		privKeyPath, knownHostsPath, m.FingerprintConfirmed, cmd,
+	)
+
+	if err != nil {
+		slog.Error("shutdown failed", "machine_id", id, "error", err)
+		writeJSON(w, ShutdownResponse{Success: false, Error: err.Error()})
+		return
+	}
+
+	responseSuccess := result.Success
+	responseOutput := result.Output
+	responseError := result.Error
+
+	if !responseSuccess && m.ShutdownCommand != "" && sshmanager.IsShutdownCommand(m.ShutdownCommand) {
+		if isExpectedShutdownError(result.Error) {
+			responseSuccess = true
+			responseError = ""
+			if responseOutput == "" {
+				responseOutput = "shutdown command sent (host session terminated as expected)"
+			}
+		}
+	}
+
+	writeJSON(w, ShutdownResponse{
+		Success: responseSuccess,
+		Output:  responseOutput,
+		Error:   responseError,
+	})
+}
+
+func isExpectedShutdownError(errMsg string) bool {
+	if errMsg == "" {
+		return false
+	}
+	return strings.Contains(errMsg, "remote command exited without exit status") ||
+		strings.Contains(errMsg, "connection refused") ||
+		strings.Contains(errMsg, "connection reset by peer") ||
+		strings.Contains(errMsg, "use of closed network connection")
+}
+
 func (h *MachineHandler) TestConnection(w http.ResponseWriter, r *http.Request) {
 	id, err := strconv.ParseInt(chi.URLParam(r, "id"), 10, 64)
 	if err != nil {
@@ -239,13 +333,13 @@ func (h *MachineHandler) TestConnection(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
-	knownHostsPath, err := sshmanager.EnsureKnownHosts(filepath.Join("/var/lib/syncserver", "ssh"))
+	knownHostsPath, err := sshmanager.EnsureKnownHosts(h.cfg.SSHDir())
 	if err != nil {
 		writeError(w, http.StatusInternalServerError, "failed to ensure known_hosts")
 		return
 	}
 
-	privKeyPath := filepath.Join("/var/lib/syncserver", "ssh", "id_ed25519")
+	privKeyPath := filepath.Join(h.cfg.SSHDir(), "id_ed25519")
 	if m.SSHKeyID != nil {
 		sshKeyRepo := models.NewSSHKeyRepository(h.db)
 		sshKey, err := sshKeyRepo.GetByID(*m.SSHKeyID)
@@ -292,30 +386,154 @@ func (h *MachineHandler) ApproveFingerprint(w http.ResponseWriter, r *http.Reque
 
 	var req struct {
 		Fingerprint string `json:"fingerprint"`
+		HostKey    string `json:"host_key"`
 	}
-	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
-		writeError(w, http.StatusBadRequest, "invalid request body")
-		return
-	}
-	if req.Fingerprint == "" {
-		writeError(w, http.StatusBadRequest, "fingerprint is required")
+	json.NewDecoder(r.Body).Decode(&req)
+
+	sshDir := h.cfg.SSHDir()
+	knownHostsPath, err := sshmanager.EnsureKnownHosts(sshDir)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, "failed to ensure known_hosts")
 		return
 	}
 
-	if err := repo.UpdateFingerprint(id, true, req.Fingerprint); err != nil {
+	privKeyPath := filepath.Join(h.cfg.SSHDir(), "id_ed25519")
+	if m.SSHKeyID != nil {
+		sshKeyRepo := models.NewSSHKeyRepository(h.db)
+		sshKey, err := sshKeyRepo.GetByID(*m.SSHKeyID)
+		if err == nil && sshKey.PrivateKeyPath != "" {
+			privKeyPath = sshKey.PrivateKeyPath
+		}
+	}
+
+	var fingerprint, pubKeyLine string
+
+	if req.HostKey != "" {
+		pubKeyLine = req.HostKey
+	} else {
+		conn, fp, pubKey, err := sshmanager.ConnectForApproval(
+			context.Background(), m.Host, m.Port, m.SSHUser,
+			privKeyPath, knownHostsPath,
+		)
+		if err != nil {
+			writeError(w, http.StatusInternalServerError, fmt.Sprintf("could not retrieve host key: %v", err))
+			return
+		}
+		conn.Close()
+		fingerprint = fp
+		pubKeyLine = string(ssh.MarshalAuthorizedKey(pubKey))
+	}
+
+	if fingerprint == "" && req.Fingerprint != "" {
+		fingerprint = req.Fingerprint
+	}
+
+	if pubKeyLine != "" {
+		if err := sshmanager.AddKnownHost(sshDir, m.Host, m.Port, []byte(pubKeyLine)); err != nil {
+			writeError(w, http.StatusInternalServerError, fmt.Sprintf("failed to add known_host entry: %v", err))
+			return
+		}
+	}
+
+	if err := repo.UpdateFingerprint(id, true, fingerprint); err != nil {
 		slog.Error("failed to update fingerprint", "id", id, "error", err)
 		writeError(w, http.StatusInternalServerError, "failed to update fingerprint")
 		return
 	}
 
-	sshDir := filepath.Join("/var/lib/syncserver", "ssh")
-	if err := sshmanager.AddKnownHost(sshDir, m.Host, m.Port, []byte(req.Fingerprint)); err != nil {
-		slog.Warn("failed to add known_host entry", "host", m.Host, "error", err)
+	m.FingerprintConfirmed = true
+	m.HostKeyFingerprint = &fingerprint
+	writeJSON(w, machineToResp(*m))
 }
 
-	m.FingerprintConfirmed = true
-	m.HostKeyFingerprint = &req.Fingerprint
-	writeJSON(w, machineToResp(*m))
+func (h *MachineHandler) DeployKeys(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.ParseInt(chi.URLParam(r, "id"), 10, 64)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid id")
+		return
+	}
+	repo := models.NewMachineRepository(h.db)
+	m, err := repo.GetByID(id)
+	if err == sql.ErrNoRows {
+		writeError(w, http.StatusNotFound, "machine not found")
+		return
+	}
+	if err != nil {
+		slog.Error("failed to fetch machine", "id", id, "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to fetch machine")
+		return
+	}
+
+	var req struct {
+		KnownHostsHost   string `json:"known_hosts_host"`
+		IncludeServerKey bool   `json:"include_server_key"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	serverKeyPath := h.cfg.SSHDir() + "/id_ed25519"
+
+	if m.SSHKeyID != nil {
+		sshKeyRepo := models.NewSSHKeyRepository(h.db)
+		sshKey, err := sshKeyRepo.GetByID(*m.SSHKeyID)
+		if err == nil && sshKey.PrivateKeyPath != "" {
+			serverKeyPath = sshKey.PrivateKeyPath
+		}
+	}
+
+	allMachines, err := repo.GetAll()
+	if err != nil {
+		slog.Warn("failed to fetch machines for auto-detect", "error", err)
+	}
+
+	var keys []sshmanager.DeployKey
+	seenKeys := make(map[string]bool)
+	knownHostsHosts := []string{}
+
+	for _, other := range allMachines {
+		if other.ID == m.ID {
+			continue
+		}
+		knownHostsHosts = append(knownHostsHosts, fmt.Sprintf("%s:%d", other.Host, other.Port))
+		if other.SSHKeyID != nil {
+			skRepo := models.NewSSHKeyRepository(h.db)
+			sk, err := skRepo.GetByID(*other.SSHKeyID)
+			if err == nil && sk.PrivateKeyPath != "" {
+				if seenKeys[sk.PrivateKeyPath] {
+					continue
+				}
+				seenKeys[sk.PrivateKeyPath] = true
+				keys = append(keys, sshmanager.DeployKey{
+					LocalPath:  sk.PrivateKeyPath,
+					RemotePath: h.cfg.SSHDir() + "/keys/" + filepath.Base(sk.PrivateKeyPath),
+					Mode:       0600,
+				})
+			}
+		}
+	}
+
+	if len(keys) == 0 {
+		slog.Info("no keys auto-detected for machine, using empty key list", "machine", m.Name)
+	}
+
+	result, err := sshmanager.DeployKeysToMachine(
+		context.Background(),
+		serverKeyPath,
+		m.Host,
+		m.Port,
+		m.SSHUser,
+		keys,
+		knownHostsHosts,
+		h.cfg.SSHDir(),
+	)
+	if err != nil {
+		writeError(w, http.StatusInternalServerError, err.Error())
+		return
+	}
+
+	writeJSON(w, result)
 }
 
 func (h *MachineHandler) Refresh(w http.ResponseWriter, r *http.Request) {
@@ -352,11 +570,10 @@ func (h *MachineHandler) Delete(w http.ResponseWriter, r *http.Request) {
 }
 
 func machineToResp(m models.Machine) MachineResponse {
-	var status string
+	var lastSeen *string
 	if m.LastSeenAt != nil {
-		status = m.Status + " (last seen " + m.LastSeenAt.Format(time.RFC3339) + ")"
-	} else {
-		status = m.Status
+		s := m.LastSeenAt.Format(time.RFC3339)
+		lastSeen = &s
 	}
 	return MachineResponse{
 		ID:                          m.ID,
@@ -372,7 +589,10 @@ func machineToResp(m models.Machine) MachineResponse {
 		WakeCheckIntervalSeconds:    m.WakeCheckIntervalSeconds,
 		FingerprintConfirmed:        m.FingerprintConfirmed,
 		HostKeyFingerprint:          m.HostKeyFingerprint,
-		Status:                      status,
+		Status:                      m.Status,
+		LastSeenAt:                  lastSeen,
+		CreatedAt:                   m.CreatedAt.Format(time.RFC3339),
+		ShutdownCommand:             m.ShutdownCommand,
 	}
 }
 

internal/api/handlers_schedules.go

@@ -0,0 +1,243 @@
+package api
+
+import (
+	"database/sql"
+	"encoding/json"
+	"log/slog"
+	"net/http"
+	"strconv"
+	"time"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/syncserver/internal/models"
+	"github.com/syncserver/internal/scheduler"
+)
+
+type ScheduleHandler struct {
+	db *sql.DB
+}
+
+func NewScheduleHandler(db *sql.DB) *ScheduleHandler {
+	return &ScheduleHandler{db: db}
+}
+
+func (h *ScheduleHandler) List(w http.ResponseWriter, r *http.Request) {
+	repo := models.NewScheduleRepository(h.db)
+	schedules, err := repo.GetAll()
+	if err != nil {
+		slog.Error("failed to fetch schedules", "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to fetch schedules")
+		return
+	}
+
+	pairRepo := models.NewSyncPairRepository(h.db)
+	pairs, err := pairRepo.GetAll()
+	if err != nil {
+		slog.Error("failed to fetch sync pairs", "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to fetch sync pairs")
+		return
+	}
+	pairMap := make(map[int64]string)
+	for _, p := range pairs {
+		pairMap[p.ID] = p.Name
+	}
+
+	out := make([]ScheduleResponse, len(schedules))
+	for i, s := range schedules {
+		out[i] = scheduleToResp(s, pairMap)
+	}
+	writeJSON(w, out)
+}
+
+func (h *ScheduleHandler) Get(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.ParseInt(chi.URLParam(r, "id"), 10, 64)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid id")
+		return
+	}
+	repo := models.NewScheduleRepository(h.db)
+	s, err := repo.GetByID(id)
+	if err == sql.ErrNoRows {
+		writeError(w, http.StatusNotFound, "schedule not found")
+		return
+	}
+	if err != nil {
+		slog.Error("failed to fetch schedule", "id", id, "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to fetch schedule")
+		return
+	}
+
+	pairRepo := models.NewSyncPairRepository(h.db)
+	pairs, err := pairRepo.GetAll()
+	if err != nil {
+		slog.Error("failed to fetch sync pairs", "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to fetch sync pairs")
+		return
+	}
+	pairMap := make(map[int64]string)
+	for _, p := range pairs {
+		pairMap[p.ID] = p.Name
+	}
+
+	writeJSON(w, scheduleToResp(*s, pairMap))
+}
+
+func (h *ScheduleHandler) Create(w http.ResponseWriter, r *http.Request) {
+	var req CreateScheduleRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	if req.SyncPairID <= 0 {
+		writeError(w, http.StatusBadRequest, "sync_pair_id is required")
+		return
+	}
+	if req.CronExpr == "" {
+		writeError(w, http.StatusBadRequest, "cron_expr is required")
+		return
+	}
+
+	_, err := scheduler.ParseCron(req.CronExpr)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid cron expression: "+err.Error())
+		return
+	}
+
+	pairRepo := models.NewSyncPairRepository(h.db)
+	_, err = pairRepo.GetByID(req.SyncPairID)
+	if err == sql.ErrNoRows {
+		writeError(w, http.StatusBadRequest, "sync_pair not found")
+		return
+	}
+	if err != nil {
+		slog.Error("failed to fetch sync pair", "id", req.SyncPairID, "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to validate sync pair")
+		return
+	}
+
+	expr, _ := scheduler.ParseCron(req.CronExpr)
+	var nextRun *time.Time
+	if expr != nil {
+		t := scheduler.NextRun(expr, time.Now().UTC())
+		nextRun = &t
+	}
+
+	s := &models.Schedule{
+		SyncPairID: req.SyncPairID,
+		CronExpr:   req.CronExpr,
+		NextRunAt:  nextRun,
+		Enabled:    req.Enabled,
+	}
+
+	repo := models.NewScheduleRepository(h.db)
+	id, err := repo.Create(s)
+	if err != nil {
+		slog.Error("failed to create schedule", "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to create schedule")
+		return
+	}
+	s.ID = id
+
+	pairs, _ := pairRepo.GetAll()
+	pairMap := make(map[int64]string)
+	for _, p := range pairs {
+		pairMap[p.ID] = p.Name
+	}
+
+	w.Header().Set("Location", "/api/schedules/"+strconv.FormatInt(id, 10))
+	writeJSON(w, scheduleToResp(*s, pairMap), http.StatusCreated)
+}
+
+func (h *ScheduleHandler) Update(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.ParseInt(chi.URLParam(r, "id"), 10, 64)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid id")
+		return
+	}
+
+	var req UpdateScheduleRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid request body")
+		return
+	}
+
+	repo := models.NewScheduleRepository(h.db)
+	existing, err := repo.GetByID(id)
+	if err == sql.ErrNoRows {
+		writeError(w, http.StatusNotFound, "schedule not found")
+		return
+	}
+	if err != nil {
+		slog.Error("failed to fetch schedule", "id", id, "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to fetch schedule")
+		return
+	}
+
+	if req.CronExpr != "" {
+		_, err := scheduler.ParseCron(req.CronExpr)
+		if err != nil {
+			writeError(w, http.StatusBadRequest, "invalid cron expression: "+err.Error())
+			return
+		}
+		existing.CronExpr = req.CronExpr
+		expr, _ := scheduler.ParseCron(req.CronExpr)
+		if expr != nil {
+			t := scheduler.NextRun(expr, time.Now().UTC())
+			existing.NextRunAt = &t
+		}
+	}
+
+	if req.Enabled {
+		existing.Enabled = true
+	} else if req.Enabled == false {
+		existing.Enabled = false
+	}
+
+	if err := repo.Update(existing); err != nil {
+		slog.Error("failed to update schedule", "id", id, "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to update schedule")
+		return
+	}
+
+	pairRepo := models.NewSyncPairRepository(h.db)
+	pairs, _ := pairRepo.GetAll()
+	pairMap := make(map[int64]string)
+	for _, p := range pairs {
+		pairMap[p.ID] = p.Name
+	}
+
+	writeJSON(w, scheduleToResp(*existing, pairMap))
+}
+
+func (h *ScheduleHandler) Delete(w http.ResponseWriter, r *http.Request) {
+	id, err := strconv.ParseInt(chi.URLParam(r, "id"), 10, 64)
+	if err != nil {
+		writeError(w, http.StatusBadRequest, "invalid id")
+		return
+	}
+
+	repo := models.NewScheduleRepository(h.db)
+	if err := repo.Delete(id); err != nil {
+		slog.Error("failed to delete schedule", "id", id, "error", err)
+		writeError(w, http.StatusInternalServerError, "failed to delete schedule")
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}
+
+func scheduleToResp(s models.Schedule, pairMap map[int64]string) ScheduleResponse {
+	resp := ScheduleResponse{
+		ID:          s.ID,
+		SyncPairID:  s.SyncPairID,
+		SyncPairName: pairMap[s.SyncPairID],
+		CronExpr:    s.CronExpr,
+		Enabled:     s.Enabled,
+		CreatedAt:  s.CreatedAt.Format(time.RFC3339),
+	}
+	if s.NextRunAt != nil {
+		t := s.NextRunAt.Format(time.RFC3339)
+		resp.NextRun = &t
+	}
+	return resp
+}

internal/api/handlers_syncpairs.go

@@ -3,10 +3,12 @@ package api
 import (
 	"database/sql"
 	"encoding/json"
+	"fmt"
 	"log/slog"
 	"net/http"
 	"regexp"
 	"strconv"
+	"strings"
 
 	"github.com/go-chi/chi/v5"
 	"github.com/syncserver/internal/models"
@@ -22,6 +24,23 @@ func NewSyncPairHandler(db *sql.DB) *SyncPairHandler {
 
 var directionRegex = regexp.MustCompile(`^(push|pull|mirror)$`)
 
+func ValidatePath(path string) error {
+	path = strings.TrimSpace(path)
+	if path == "" {
+		return fmt.Errorf("path cannot be empty")
+	}
+	if strings.Contains(path, "..") {
+		return fmt.Errorf("path cannot contain '..'")
+	}
+	if strings.HasPrefix(path, "-") {
+		return fmt.Errorf("path cannot start with '-'")
+	}
+	if strings.Contains(path, "\x00") {
+		return fmt.Errorf("path cannot contain null bytes")
+	}
+	return nil
+}
+
 func (h *SyncPairHandler) List(w http.ResponseWriter, r *http.Request) {
 	repo := models.NewSyncPairRepository(h.db)
 	pairs, err := repo.GetAll()
@@ -68,6 +87,14 @@ func (h *SyncPairHandler) Create(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusBadRequest, "name, source_path and dest_path are required")
 		return
 	}
+	if err := ValidatePath(req.SourcePath); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid source_path: "+err.Error())
+		return
+	}
+	if err := ValidatePath(req.DestPath); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid dest_path: "+err.Error())
+		return
+	}
 	if req.Direction == "" {
 		req.Direction = "push"
 	}
@@ -75,8 +102,8 @@ func (h *SyncPairHandler) Create(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusBadRequest, "direction must be push, pull, or mirror")
 		return
 	}
-	if req.SourceMachineID != nil && req.DestMachineID != nil {
-		writeError(w, http.StatusBadRequest, "both source and destination cannot be remote machines; one side must be the server (set one MachineID to null)")
+	if req.SourceMachineID != nil && req.DestMachineID != nil && *req.SourceMachineID == *req.DestMachineID {
+		writeError(w, http.StatusBadRequest, "source and destination cannot be the same machine")
 		return
 	}
 	if req.RsyncFlags == "" {
@@ -127,12 +154,20 @@ func (h *SyncPairHandler) Update(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusBadRequest, "name, source_path and dest_path are required")
 		return
 	}
+	if err := ValidatePath(req.SourcePath); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid source_path: "+err.Error())
+		return
+	}
+	if err := ValidatePath(req.DestPath); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid dest_path: "+err.Error())
+		return
+	}
 	if !directionRegex.MatchString(req.Direction) {
 		writeError(w, http.StatusBadRequest, "direction must be push, pull, or mirror")
 		return
 	}
-	if req.SourceMachineID != nil && req.DestMachineID != nil {
-		writeError(w, http.StatusBadRequest, "both source and destination cannot be remote machines; one side must be the server (set one MachineID to null)")
+	if req.SourceMachineID != nil && req.DestMachineID != nil && *req.SourceMachineID == *req.DestMachineID {
+		writeError(w, http.StatusBadRequest, "source and destination cannot be the same machine")
 		return
 	}
 

internal/api/handlers_ws.go

@@ -45,7 +45,7 @@ func (h *SSEHandler) StreamAll(w http.ResponseWriter, r *http.Request) {
 		select {
 		case evt := <-events:
 			data, _ := json.Marshal(evt)
-			fmt.Fprintf(w, "event: %s\ndata: %s\n\n", evt.Type, data)
+			fmt.Fprintf(w, "data: %s\n\n", data)
 			flusher.Flush()
 		case <-r.Context().Done():
 			return
@@ -94,7 +94,7 @@ func (h *SSEHandler) StreamJob(w http.ResponseWriter, r *http.Request) {
 		select {
 		case evt := <-events:
 			data, _ := json.Marshal(evt)
-			fmt.Fprintf(w, "event: %s\ndata: %s\n\n", evt.Type, data)
+			fmt.Fprintf(w, "data: %s\n\n", data)
 			flusher.Flush()
 		case <-r.Context().Done():
 			return

internal/api/router.go

@@ -3,9 +3,12 @@ package api
 import (
 	"database/sql"
 	"encoding/json"
+	"fmt"
 	"log/slog"
 	"net/http"
+	"os"
 	"runtime/debug"
+	"sort"
 
 	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/chi/v5/middleware"
@@ -34,41 +37,60 @@ func NewServer(cfg *config.Config, db *sql.DB, engine *syncengine.Engine) *Serve
 	s := &Server{router: r, cfg: cfg, engine: engine}
 
 	authHandler := NewAuthHandler(db)
-	machineHandler := NewMachineHandler(db, engine)
+	machineHandler := NewMachineHandler(db, engine, cfg)
 	syncPairHandler := NewSyncPairHandler(db)
+	scheduleHandler := NewScheduleHandler(db)
 	jobHandler := NewJobHandler(db, engine)
 	sseHandler := NewSSEHandler(engine)
 	sshKeyHandler := NewSSHKeyHandler(db, cfg)
 
+		admin := func(h http.Handler) http.Handler {
+		return auth.RequireAdmin(auth.RequireAuth(h))
+	}
+
+	authGet := func(h http.Handler) http.Handler {
+		return auth.RequireAuth(h)
+	}
+
 		r.Route("/api", func(r chi.Router) {
 		r.Route("/auth", func(r chi.Router) {
 			r.Post("/login", authHandler.Login)
 			r.Post("/logout", authHandler.Logout)
-			r.With(auth.RequireAuth).Get("/me", authHandler.Me)
+			r.With(authGet).Get("/me", authHandler.Me)
 		})
 
-		r.With(auth.RequireAuth).Route("/machines", func(r chi.Router) {
+		r.With(authGet).Route("/machines", func(r chi.Router) {
 			r.Get("/", machineHandler.List)
-			r.Post("/", machineHandler.Create)
-			r.Post("/refresh", machineHandler.Refresh)
+			r.With(admin).Post("/", machineHandler.Create)
+			r.With(admin).Post("/refresh", machineHandler.Refresh)
 			r.Get("/{id}", machineHandler.Get)
-			r.Put("/{id}", machineHandler.Update)
-			r.Delete("/{id}", machineHandler.Delete)
+			r.With(admin).Put("/{id}", machineHandler.Update)
+			r.With(admin).Delete("/{id}", machineHandler.Delete)
 			r.Post("/{id}/test-wol", machineHandler.TestWoL)
+			r.With(admin).Post("/{id}/shutdown", machineHandler.Shutdown)
 			r.Post("/{id}/test-connection", machineHandler.TestConnection)
-			r.Post("/{id}/approve-fingerprint", machineHandler.ApproveFingerprint)
+			r.With(admin).Post("/{id}/approve-fingerprint", machineHandler.ApproveFingerprint)
+			r.With(admin).Post("/{id}/deploy-keys", machineHandler.DeployKeys)
 		})
 
-		r.With(auth.RequireAuth).Route("/sync-pairs", func(r chi.Router) {
+		r.With(authGet).Route("/sync-pairs", func(r chi.Router) {
 			r.Get("/", syncPairHandler.List)
 			r.Post("/", syncPairHandler.Create)
 			r.Get("/{id}", syncPairHandler.Get)
 			r.Put("/{id}", syncPairHandler.Update)
-			r.Delete("/{id}", syncPairHandler.Delete)
+			r.With(admin).Delete("/{id}", syncPairHandler.Delete)
 			r.Post("/{id}/run", jobHandler.TriggerRun)
 		})
 
-		r.With(auth.RequireAuth).Route("/jobs", func(r chi.Router) {
+		r.With(authGet).Route("/schedules", func(r chi.Router) {
+			r.Get("/", scheduleHandler.List)
+			r.Post("/", scheduleHandler.Create)
+			r.Get("/{id}", scheduleHandler.Get)
+			r.Put("/{id}", scheduleHandler.Update)
+			r.With(admin).Delete("/{id}", scheduleHandler.Delete)
+		})
+
+		r.With(authGet).Route("/jobs", func(r chi.Router) {
 			r.Get("/", jobHandler.List)
 			r.Get("/{id}", jobHandler.Get)
 			r.Post("/{id}/cancel", jobHandler.Cancel)
@@ -77,15 +99,15 @@ func NewServer(cfg *config.Config, db *sql.DB, engine *syncengine.Engine) *Serve
 			r.Get("/{id}/log/stream", sseHandler.StreamJob)
 		})
 
-		r.With(auth.RequireAuth).Get("/jobs/stream", sseHandler.StreamAll)
+		r.With(authGet).Get("/jobs/stream", sseHandler.StreamAll)
 
-		r.With(auth.RequireAuth).Get("/settings/pubkey", func(w http.ResponseWriter, r *http.Request) {
+		r.With(authGet).Get("/settings/pubkey", func(w http.ResponseWriter, r *http.Request) {
 			_, _, pubKey, _ := sshmanager.EnsureServerKey(cfg.SSHDir())
 			w.Header().Set("Content-Type", "text/plain")
 			w.Write([]byte(pubKey))
 		})
 
-		r.With(auth.RequireAuth).Get("/settings/info", func(w http.ResponseWriter, r *http.Request) {
+		r.With(authGet).Get("/settings/info", func(w http.ResponseWriter, r *http.Request) {
 			_, _, pubKey, _ := sshmanager.EnsureServerKey(cfg.SSHDir())
 			resp := SettingsInfoResponse{
 				Version:   cfg.Version,
@@ -96,12 +118,12 @@ func NewServer(cfg *config.Config, db *sql.DB, engine *syncengine.Engine) *Serve
 			json.NewEncoder(w).Encode(resp)
 		})
 
-		r.With(auth.RequireAuth).Route("/ssh-keys", func(r chi.Router) {
+		r.With(authGet).Route("/ssh-keys", func(r chi.Router) {
 			r.Get("/", sshKeyHandler.List)
-			r.Post("/", sshKeyHandler.Create)
+			r.With(admin).Post("/", sshKeyHandler.Create)
 			r.Get("/{id}", sshKeyHandler.Get)
-			r.Delete("/{id}", sshKeyHandler.Delete)
-			r.Get("/{id}/private", sshKeyHandler.DownloadPrivate)
+			r.With(admin).Delete("/{id}", sshKeyHandler.Delete)
+			r.With(admin).Get("/{id}/private", sshKeyHandler.DownloadPrivate)
 		})
 	})
 
@@ -109,6 +131,64 @@ func NewServer(cfg *config.Config, db *sql.DB, engine *syncengine.Engine) *Serve
 		w.Write([]byte("ok"))
 	}))
 
+	r.Get("/healthz", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("ok"))
+	}))
+
+	r.Get("/readyz", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		db := s.engine.DB()
+		if _, err := db.Exec("SELECT 1"); err != nil {
+			http.Error(w, fmt.Sprintf("db query failed: %v", err), http.StatusServiceUnavailable)
+			return
+		}
+		if _, err := db.Exec("SELECT 1"); err != nil {
+			http.Error(w, fmt.Sprintf("db write test failed: %v", err), http.StatusServiceUnavailable)
+			return
+		}
+		sshDir := s.cfg.SSHDir()
+		if _, err := os.Stat(sshDir); err != nil {
+			http.Error(w, fmt.Sprintf("ssh dir not accessible: %v", err), http.StatusServiceUnavailable)
+			return
+		}
+		w.Write([]byte("ok"))
+	}))
+
+	r.Get("/metrics", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "text/plain; version=0.0.4")
+
+		jobsTotal := s.engine.GetJobsTotal()
+		var keys []string
+		for k := range jobsTotal {
+			keys = append(keys, k)
+		}
+		sort.Strings(keys)
+		for _, status := range keys {
+			fmt.Fprintf(w, "# HELP syncserver_jobs_total Total jobs by final status\n")
+			fmt.Fprintf(w, "# TYPE syncserver_jobs_total counter\n")
+			fmt.Fprintf(w, "syncserver_jobs_total{status=%q} %d\n", status, jobsTotal[status])
+		}
+
+		fmt.Fprintf(w, "# HELP syncserver_jobs_running Currently running jobs\n")
+		fmt.Fprintf(w, "# TYPE syncserver_jobs_running gauge\n")
+		fmt.Fprintf(w, "syncserver_jobs_running %d\n", s.engine.GetJobsRunning())
+
+		fmt.Fprintf(w, "# HELP syncserver_queue_depth Jobs waiting to run\n")
+		fmt.Fprintf(w, "# TYPE syncserver_queue_depth gauge\n")
+		fmt.Fprintf(w, "syncserver_queue_depth %d\n", s.engine.GetQueueDepth())
+
+		online, total := s.engine.GetMachineCounts()
+		fmt.Fprintf(w, "# HELP syncserver_machines_online Online machines count\n")
+		fmt.Fprintf(w, "# TYPE syncserver_machines_online gauge\n")
+		fmt.Fprintf(w, "syncserver_machines_online %d\n", online)
+		fmt.Fprintf(w, "# HELP syncserver_machines_total Total machines\n")
+		fmt.Fprintf(w, "# TYPE syncserver_machines_total gauge\n")
+		fmt.Fprintf(w, "syncserver_machines_total %d\n", total)
+
+		fmt.Fprintf(w, "# HELP syncserver_up Server is up\n")
+		fmt.Fprintf(w, "# TYPE syncserver_up gauge\n")
+		fmt.Fprintf(w, "syncserver_up 1\n")
+	}))
+
 	r.NotFound(func(w http.ResponseWriter, r *http.Request) {
 		webui.ServeSPA().ServeHTTP(w, r)
 	})

internal/auth/auth_test.go

@@ -0,0 +1,411 @@
+package auth
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/golang-jwt/jwt/v5"
+	_ "modernc.org/sqlite"
+)
+
+func TestJWT_Generate(t *testing.T) {
+	mgr := NewJWTManager("test-secret", 24)
+
+	token, expiresAt, err := mgr.Generate(1, "testuser", "admin")
+	if err != nil {
+		t.Fatalf("Generate() error = %v", err)
+	}
+	if token == "" {
+		t.Fatal("Generate() returned empty token")
+	}
+	if expiresAt.Before(time.Now()) {
+		t.Fatal("Generate() returned past expiration time")
+	}
+	if expiresAt.Before(time.Now().Add(23 * time.Hour)) {
+		t.Fatal("Generate() expiration time is too early")
+	}
+
+	claims, err := mgr.Validate(token)
+	if err != nil {
+		t.Fatalf("Validate() error = %v", err)
+	}
+	if claims.UserID != 1 {
+		t.Errorf("claims.UserID = %d, want 1", claims.UserID)
+	}
+	if claims.Username != "testuser" {
+		t.Errorf("claims.Username = %s, want testuser", claims.Username)
+	}
+	if claims.Role != "admin" {
+		t.Errorf("claims.Role = %s, want admin", claims.Role)
+	}
+}
+
+func TestJWT_Validate_ValidToken(t *testing.T) {
+	mgr := NewJWTManager("test-secret", 24)
+	token, _, err := mgr.Generate(42, "alice", "user")
+	if err != nil {
+		t.Fatalf("Generate() error = %v", err)
+	}
+
+	claims, err := mgr.Validate(token)
+	if err != nil {
+		t.Fatalf("Validate() error = %v", err)
+	}
+	if claims.UserID != 42 {
+		t.Errorf("claims.UserID = %d, want 42", claims.UserID)
+	}
+	if claims.Username != "alice" {
+		t.Errorf("claims.Username = %s, want alice", claims.Username)
+	}
+	if claims.Role != "user" {
+		t.Errorf("claims.Role = %s, want user", claims.Role)
+	}
+}
+
+func TestJWT_Validate_ExpiredToken(t *testing.T) {
+	mgr := NewJWTManager("test-secret", 0)
+
+	token := jwtWithExpiry(time.Now().Add(-1 * time.Hour))
+
+	_, err := mgr.Validate(token)
+	if !errors.Is(err, ErrExpiredToken) {
+		t.Errorf("Validate() error = %v, want ErrExpiredToken", err)
+	}
+}
+
+func TestJWT_Validate_InvalidToken(t *testing.T) {
+	mgr := NewJWTManager("test-secret", 24)
+
+	tests := []struct {
+		name  string
+		token string
+	}{
+		{"malformed token", "not.a.token"},
+		{"empty token", ""},
+		{"random string", "abcdef123456"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, err := mgr.Validate(tt.token)
+			if err == nil {
+				t.Error("Validate() expected error for invalid token")
+			}
+		})
+	}
+}
+
+func TestJWT_Validate_WrongSecret(t *testing.T) {
+	mgr1 := NewJWTManager("secret-one", 24)
+	mgr2 := NewJWTManager("secret-two", 24)
+
+	token, _, err := mgr1.Generate(1, "user", "admin")
+	if err != nil {
+		t.Fatalf("Generate() error = %v", err)
+	}
+
+	_, err = mgr2.Validate(token)
+	if err == nil {
+		t.Error("Validate() expected error for token signed with different secret")
+	}
+}
+
+func TestPassword_HashPassword_RandomSalts(t *testing.T) {
+	password := "samepassword123"
+
+	hash1, err := HashPassword(password)
+	if err != nil {
+		t.Fatalf("HashPassword() error = %v", err)
+	}
+	hash2, err := HashPassword(password)
+	if err != nil {
+		t.Fatalf("HashPassword() error = %v", err)
+	}
+
+	if string(hash1) == string(hash2) {
+		t.Error("HashPassword() produced identical hashes for same password")
+	}
+}
+
+func TestPassword_CheckPassword_Correct(t *testing.T) {
+	password := "mysecretpassword"
+	hash, err := HashPassword(password)
+	if err != nil {
+		t.Fatalf("HashPassword() error = %v", err)
+	}
+
+	if !VerifyPassword(hash, password) {
+		t.Error("VerifyPassword() returned false for correct password")
+	}
+}
+
+func TestPassword_CheckPassword_Wrong(t *testing.T) {
+	password := "mysecretpassword"
+	wrongPassword := "wrongpassword"
+	hash, err := HashPassword(password)
+	if err != nil {
+		t.Fatalf("HashPassword() error = %v", err)
+	}
+
+	if VerifyPassword(hash, wrongPassword) {
+		t.Error("VerifyPassword() returned true for wrong password")
+	}
+}
+
+func TestMiddleware_RequireAuth_NoToken(t *testing.T) {
+	InitJWTManager("test-secret", 24)
+
+	handler := RequireAuth(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		t.Error("next handler should not be called")
+	}))
+
+	req := httptest.NewRequest(http.MethodGet, "/", nil)
+	rr := httptest.NewRecorder()
+
+	handler.ServeHTTP(rr, req)
+
+	if rr.Code != http.StatusUnauthorized {
+		t.Errorf("RequireAuth() status = %d, want %d", rr.Code, http.StatusUnauthorized)
+	}
+}
+
+func TestMiddleware_RequireAuth_InvalidToken(t *testing.T) {
+	InitJWTManager("test-secret", 24)
+
+	handler := RequireAuth(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		t.Error("next handler should not be called")
+	}))
+
+	req := httptest.NewRequest(http.MethodGet, "/", nil)
+	req.AddCookie(&http.Cookie{Name: CookieName, Value: "invalid-token"})
+
+	rr := httptest.NewRecorder()
+
+	handler.ServeHTTP(rr, req)
+
+	if rr.Code != http.StatusUnauthorized {
+		t.Errorf("RequireAuth() status = %d, want %d", rr.Code, http.StatusUnauthorized)
+	}
+}
+
+func TestMiddleware_RequireAuth_ValidToken(t *testing.T) {
+	secret := "test-secret"
+	InitJWTManager(secret, 24)
+
+	mgr := GetJWTManager()
+	token, _, err := mgr.Generate(99, "testuser", "admin")
+	if err != nil {
+		t.Fatalf("Generate() error = %v", err)
+	}
+
+	var capturedClaims *Claims
+	handler := RequireAuth(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		capturedClaims = GetClaims(r.Context())
+		w.WriteHeader(http.StatusOK)
+	}))
+
+	req := httptest.NewRequest(http.MethodGet, "/", nil)
+	req.AddCookie(&http.Cookie{Name: CookieName, Value: token})
+
+	rr := httptest.NewRecorder()
+
+	handler.ServeHTTP(rr, req)
+
+	if rr.Code != http.StatusOK {
+		t.Errorf("RequireAuth() status = %d, want %d", rr.Code, http.StatusOK)
+	}
+	if capturedClaims == nil {
+		t.Fatal("RequireAuth() did not set claims in context")
+	}
+	if capturedClaims.UserID != 99 {
+		t.Errorf("capturedClaims.UserID = %d, want 99", capturedClaims.UserID)
+	}
+	if capturedClaims.Username != "testuser" {
+		t.Errorf("capturedClaims.Username = %s, want testuser", capturedClaims.Username)
+	}
+	if capturedClaims.Role != "admin" {
+		t.Errorf("capturedClaims.Role = %s, want admin", capturedClaims.Role)
+	}
+}
+
+func TestMiddleware_RequireAdmin_NonAdmin(t *testing.T) {
+	InitJWTManager("test-secret", 24)
+
+	handler := RequireAdmin(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		t.Error("next handler should not be called for non-admin")
+	}))
+
+	req := httptest.NewRequest(http.MethodGet, "/", nil)
+	ctx := context.WithValue(req.Context(), ClaimsCtxKey, &Claims{Role: "user"})
+	req = req.WithContext(ctx)
+
+	rr := httptest.NewRecorder()
+
+	handler.ServeHTTP(rr, req)
+
+	if rr.Code != http.StatusForbidden {
+		t.Errorf("RequireAdmin() status = %d, want %d", rr.Code, http.StatusForbidden)
+	}
+}
+
+func TestMiddleware_RequireAdmin_NoClaims(t *testing.T) {
+	InitJWTManager("test-secret", 24)
+
+	handler := RequireAdmin(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		t.Error("next handler should not be called when no claims in context")
+	}))
+
+	req := httptest.NewRequest(http.MethodGet, "/", nil)
+
+	rr := httptest.NewRecorder()
+
+	handler.ServeHTTP(rr, req)
+
+	if rr.Code != http.StatusForbidden {
+		t.Errorf("RequireAdmin() status = %d, want %d", rr.Code, http.StatusForbidden)
+	}
+}
+
+func TestMiddleware_RequireAdmin_Admin(t *testing.T) {
+	InitJWTManager("test-secret", 24)
+
+	called := false
+	handler := RequireAdmin(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		called = true
+		w.WriteHeader(http.StatusOK)
+	}))
+
+	req := httptest.NewRequest(http.MethodGet, "/", nil)
+	ctx := context.WithValue(req.Context(), ClaimsCtxKey, &Claims{Role: "admin"})
+	req = req.WithContext(ctx)
+
+	rr := httptest.NewRecorder()
+
+	handler.ServeHTTP(rr, req)
+
+	if rr.Code != http.StatusOK {
+		t.Errorf("RequireAdmin() status = %d, want %d", rr.Code, http.StatusOK)
+	}
+	if !called {
+		t.Error("RequireAdmin() did not call next handler for admin role")
+	}
+}
+
+func TestSeed_SeedsAdminUser(t *testing.T) {
+	db, err := sql.Open("sqlite", ":memory:")
+	if err != nil {
+		t.Fatalf("sql.Open() error = %v", err)
+	}
+	defer db.Close()
+
+	_, err = db.Exec(`CREATE TABLE users (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		username TEXT UNIQUE NOT NULL,
+		password_hash TEXT NOT NULL,
+		role TEXT NOT NULL DEFAULT 'user',
+		created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+	)`)
+	if err != nil {
+		t.Fatalf("CREATE TABLE error = %v", err)
+	}
+
+	err = SeedAdmin(db, "admin", "secretpassword123")
+	if err != nil {
+		t.Fatalf("SeedAdmin() error = %v", err)
+	}
+
+	var username, role string
+	err = db.QueryRow("SELECT username, role FROM users WHERE username = 'admin'").Scan(&username, &role)
+	if err != nil {
+		t.Fatalf("QueryRow() error = %v", err)
+	}
+	if username != "admin" {
+		t.Errorf("username = %s, want admin", username)
+	}
+	if role != "admin" {
+		t.Errorf("role = %s, want admin", role)
+	}
+}
+
+func TestSeed_Idempotent(t *testing.T) {
+	db, err := sql.Open("sqlite", ":memory:")
+	if err != nil {
+		t.Fatalf("sql.Open() error = %v", err)
+	}
+	defer db.Close()
+
+	_, err = db.Exec(`CREATE TABLE users (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		username TEXT UNIQUE NOT NULL,
+		password_hash TEXT NOT NULL,
+		role TEXT NOT NULL DEFAULT 'user',
+		created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+	)`)
+	if err != nil {
+		t.Fatalf("CREATE TABLE error = %v", err)
+	}
+
+	_, err = db.Exec("INSERT INTO users (username, password_hash, role) VALUES ('admin', 'existing-hash', 'admin')")
+	if err != nil {
+		t.Fatalf("INSERT error = %v", err)
+	}
+
+	err = SeedAdmin(db, "admin", "newpassword")
+	if err != nil {
+		t.Fatalf("SeedAdmin() error = %v", err)
+	}
+
+	var count int
+	err = db.QueryRow("SELECT COUNT(*) FROM users WHERE username = 'admin'").Scan(&count)
+	if err != nil {
+		t.Fatalf("QueryRow() error = %v", err)
+	}
+	if count != 1 {
+		t.Errorf("user count = %d, want 1 (idempotent behavior)", count)
+	}
+}
+
+func TestSeed_EmptyPasswordError(t *testing.T) {
+	db, err := sql.Open("sqlite", ":memory:")
+	if err != nil {
+		t.Fatalf("sql.Open() error = %v", err)
+	}
+	defer db.Close()
+
+	_, err = db.Exec(`CREATE TABLE users (
+		id INTEGER PRIMARY KEY AUTOINCREMENT,
+		username TEXT UNIQUE NOT NULL,
+		password_hash TEXT NOT NULL,
+		role TEXT NOT NULL DEFAULT 'user',
+		created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+	)`)
+	if err != nil {
+		t.Fatalf("CREATE TABLE error = %v", err)
+	}
+
+	err = SeedAdmin(db, "admin", "")
+	if err == nil {
+		t.Error("SeedAdmin() expected error for empty password on first run")
+	}
+}
+
+func jwtWithExpiry(expiry time.Time) string {
+	claims := &Claims{
+		UserID:   1,
+		Username: "testuser",
+		Role:     "admin",
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(expiry),
+			IssuedAt:  jwt.NewNumericDate(time.Now().Add(-2 * time.Hour)),
+			NotBefore: jwt.NewNumericDate(time.Now().Add(-2 * time.Hour)),
+		},
+	}
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	signed, _ := token.SignedString([]byte("test-secret"))
+	return signed
+}

internal/auth/middleware.go

@@ -50,6 +50,10 @@ func GetClaims(ctx context.Context) *Claims {
 	return v.(*Claims)
 }
 
+func WithAuthAdmin(next http.Handler) http.Handler {
+	return RequireAdmin(RequireAuth(next))
+}
+
 var GlobalJWTManager *JWTManager
 
 func InitJWTManager(secret string, expiryH int) {

internal/auth/seed.go

@@ -2,6 +2,7 @@ package auth
 
 import (
 	"database/sql"
+	"errors"
 	"log/slog"
 )
 
@@ -9,9 +10,6 @@ func SeedAdmin(db *sql.DB, username, password string) error {
 	if username == "" {
 		username = "admin"
 	}
-	if password == "" {
-		password = "admin"
-	}
 
 	var exists bool
 	err := db.QueryRow("SELECT EXISTS(SELECT 1 FROM users WHERE username = ?)", username).Scan(&exists)
@@ -22,6 +20,10 @@ func SeedAdmin(db *sql.DB, username, password string) error {
 		return nil
 	}
 
+	if password == "" {
+		return errors.New("SYNCSERVER_ADMIN_PASSWORD environment variable is required on first run")
+	}
+
 	hash, err := HashPassword(password)
 	if err != nil {
 		return err

internal/config/config.go

@@ -32,6 +32,8 @@ type AuthConfig struct {
 type SchedulerConfig struct {
 	Timezone           string `yaml:"timezone" env:"SYNCSERVER_SCHEDULER_TZ" default:"UTC"`
 	RetentionDays      int    `yaml:"retention_days" env:"SYNCSERVER_RETENTION_DAYS" default:"30"`
+	BackupDir          string `yaml:"backup_dir" env:"SYNCSERVER_BACKUP_DIR"`
+	BackupRetentionDays int   `yaml:"backup_retention_days" env:"SYNCSERVER_BACKUP_RETENTION_DAYS" default:"7"`
 }
 
 var globalCfg *Config

internal/db/db.go

@@ -1,7 +1,9 @@
 package db
 
 import (
+	"crypto/sha256"
 	"database/sql"
+	"encoding/hex"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -62,35 +64,80 @@ func (db *DB) runMigrationsInternal(mfs embedFS, migrationsRoot string) error {
 	if _, err := db.Exec(`
 		CREATE TABLE IF NOT EXISTS schema_migrations (
 			version TEXT PRIMARY KEY,
+			checksum TEXT,
 			applied_at DATETIME DEFAULT CURRENT_TIMESTAMP
 		)
 	`); err != nil {
 		return fmt.Errorf("creating schema_migrations table: %w", err)
 	}
 
-	for _, name := range names {
-		var applied bool
-		row := db.QueryRow("SELECT 1 FROM schema_migrations WHERE version = ?", name)
-		if err := row.Scan(&applied); err == nil {
-			applied = true
+	hasChecksumCol := false
+	if rows, err := db.Query("PRAGMA table_info(schema_migrations)"); err == nil {
+		for rows.Next() {
+			var cid int
+			var cname string
+			rows.Scan(&cid, &cname, new(string), new(int), new(interface{}), new(int))
+			if cname == "checksum" {
+				hasChecksumCol = true
+			}
+		}
+		rows.Close()
 	}
 
-		if applied {
+	for _, name := range names {
+		if hasChecksumCol {
+			var storedChecksum string
+			row := db.QueryRow("SELECT checksum FROM schema_migrations WHERE version = ?", name)
+			if err := row.Scan(&storedChecksum); err == nil && storedChecksum != "" {
 				continue
 			}
+		} else {
+			var count int
+			row := db.QueryRow("SELECT COUNT(*) FROM schema_migrations WHERE version = ?", name)
+			if err := row.Scan(&count); err == nil && count > 0 {
+				continue
+			}
+		}
 
 		data, err := mfs.ReadFile(filepath.Join(migrationsRoot, name))
 		if err != nil {
 			return fmt.Errorf("reading migration %s: %w", name, err)
 		}
 
-		if _, err := db.Exec(string(data)); err != nil {
+		checksum := sha256.Sum256(data)
+		checksumHex := hex.EncodeToString(checksum[:])
+
+		tx, err := db.Begin()
+		if err != nil {
+			return fmt.Errorf("starting transaction for migration %s: %w", name, err)
+		}
+
+		if _, err := tx.Exec(string(data)); err != nil {
+			tx.Rollback()
 			return fmt.Errorf("applying migration %s: %w", name, err)
 		}
 
-		if _, err := db.Exec("INSERT INTO schema_migrations (version) VALUES (?)", name); err != nil {
+		if hasChecksumCol {
+			if _, err := tx.Exec(
+				"INSERT INTO schema_migrations (version, checksum) VALUES (?, ?)",
+				name, checksumHex,
+			); err != nil {
+				tx.Rollback()
 				return fmt.Errorf("recording migration %s: %w", name, err)
 			}
+		} else {
+			if _, err := tx.Exec(
+				"INSERT INTO schema_migrations (version) VALUES (?)",
+				name,
+			); err != nil {
+				tx.Rollback()
+				return fmt.Errorf("recording migration %s: %w", name, err)
+			}
+		}
+
+		if err := tx.Commit(); err != nil {
+			return fmt.Errorf("committing migration %s: %w", name, err)
+		}
 	}
 
 	return nil

internal/db/migrations/0005_machine_shutdown_command.sql

@@ -0,0 +1,3 @@
+-- 0005_machine_shutdown_command.sql
+
+ALTER TABLE machines ADD COLUMN shutdown_command TEXT NOT NULL DEFAULT 'shutdown now';

internal/db/migrations/0006_progress_totals.sql

@@ -0,0 +1,4 @@
+-- 0006_progress_totals.sql
+
+ALTER TABLE jobs ADD COLUMN total_size_bytes INTEGER DEFAULT 0;
+ALTER TABLE jobs ADD COLUMN sent_bytes INTEGER DEFAULT 0;

internal/db/migrations/0007_schema_migrations_checksum.sql

@@ -0,0 +1,7 @@
+-- Migration 0007: Add checksum column to schema_migrations.
+-- This migration is idempotent and safe to re-run.
+-- For existing databases (pre-1.0.54): ALTER TABLE adds the checksum column.
+-- For fresh databases (1.0.54+): 0001_init.sql now creates the table with checksum column.
+-- This migration handles the upgrade path only.
+
+ALTER TABLE schema_migrations ADD COLUMN checksum TEXT DEFAULT '';

internal/models/job.go

@@ -2,6 +2,8 @@ package models
 
 import (
 	"database/sql"
+	"fmt"
+	"strings"
 	"time"
 )
 
@@ -15,6 +17,8 @@ type Job struct {
 	LogFile         *string    `db:"log_file" json:"log_file"`
 	ErrorMessage    *string    `db:"error_message" json:"error_message,omitempty"`
 	ErrorCode       *string    `db:"error_code" json:"error_code,omitempty"`
+	TotalSizeBytes  int64      `db:"total_size_bytes" json:"total_size_bytes,omitempty"`
+	SentBytes       int64      `db:"sent_bytes" json:"sent_bytes,omitempty"`
 	CreatedAt       time.Time  `db:"created_at" json:"created_at"`
 }
 
@@ -43,9 +47,10 @@ func (r *JobRepository) GetByID(id int64) (*Job, error) {
 	var logFile, errMsg, errCode sql.NullString
 	err := r.db.QueryRow(`
 		SELECT id, sync_pair_id, trigger_type, status, started_at, finished_at,
-			log_file, error_message, error_code, created_at FROM jobs WHERE id = ?`, id).Scan(
+			log_file, error_message, error_code, total_size_bytes, sent_bytes, created_at
+		FROM jobs WHERE id = ?`, id).Scan(
 		&j.ID, &j.SyncPairID, &j.TriggerType, &j.Status, &started, &finished,
-		&logFile, &errMsg, &errCode, &j.CreatedAt)
+		&logFile, &errMsg, &errCode, &j.TotalSizeBytes, &j.SentBytes, &j.CreatedAt)
 	if err != nil {
 		return nil, err
 	}
@@ -70,7 +75,7 @@ func (r *JobRepository) GetByID(id int64) (*Job, error) {
 func (r *JobRepository) GetAll(limit, offset int) ([]Job, error) {
 	rows, err := r.db.Query(`
 		SELECT id, sync_pair_id, trigger_type, status, started_at, finished_at,
-			log_file, error_message, error_code, created_at
+			log_file, error_message, error_code, total_size_bytes, sent_bytes, created_at
 		FROM jobs ORDER BY created_at DESC LIMIT ? OFFSET ?`,
 		limit, offset)
 	if err != nil {
@@ -84,7 +89,8 @@ func (r *JobRepository) GetAll(limit, offset int) ([]Job, error) {
 		var started, finished sql.NullTime
 		var logFile, errMsg, errCode sql.NullString
 		if err := rows.Scan(&j.ID, &j.SyncPairID, &j.TriggerType, &j.Status,
-			&started, &finished, &logFile, &errMsg, &errCode, &j.CreatedAt); err != nil {
+			&started, &finished, &logFile, &errMsg, &errCode,
+			&j.TotalSizeBytes, &j.SentBytes, &j.CreatedAt); err != nil {
 			return nil, err
 		}
 		if started.Valid {
@@ -144,11 +150,11 @@ func (r *JobRepository) GetRunningBySyncPair(syncPairID int64) (*Job, error) {
 	var logFile, errMsg, errCode sql.NullString
 	err := r.db.QueryRow(`
 		SELECT id, sync_pair_id, trigger_type, status, started_at, finished_at,
-			log_file, error_message, error_code, created_at FROM jobs
+			log_file, error_message, error_code, total_size_bytes, sent_bytes, created_at FROM jobs
 		WHERE sync_pair_id = ? AND status IN ('queued','waking_up','running')
 		ORDER BY created_at DESC LIMIT 1`, syncPairID).Scan(
 		&j.ID, &j.SyncPairID, &j.TriggerType, &j.Status, &started,
-		&j.FinishedAt, &logFile, &errMsg, &errCode, &j.CreatedAt)
+		&j.FinishedAt, &logFile, &errMsg, &errCode, &j.TotalSizeBytes, &j.SentBytes, &j.CreatedAt)
 	if err != nil {
 		return nil, err
 	}
@@ -180,3 +186,61 @@ func (r *JobRepository) DeleteFinishedBefore(before time.Time) (int64, error) {
 	}
 	return res.RowsAffected()
 }
+
+func (r *JobRepository) SetTotals(id int64, totalSize, sentBytes int64) error {
+	_, err := r.db.Exec(
+		"UPDATE jobs SET total_size_bytes = ?, sent_bytes = ? WHERE id = ?",
+		totalSize, sentBytes, id,
+	)
+	return err
+}
+
+func (r *JobRepository) GetByStatusAny(statuses []string) ([]Job, error) {
+	if len(statuses) == 0 {
+		return nil, nil
+	}
+	placeholders := make([]string, len(statuses))
+	args := make([]interface{}, len(statuses))
+	for i, s := range statuses {
+		placeholders[i] = "?"
+		args[i] = s
+	}
+	query := fmt.Sprintf(`
+		SELECT id, sync_pair_id, trigger_type, status, started_at, finished_at,
+			log_file, error_message, error_code, total_size_bytes, sent_bytes, created_at
+		FROM jobs WHERE status IN (%s)`, strings.Join(placeholders, ","))
+	rows, err := r.db.Query(query, args...)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var jobs []Job
+	for rows.Next() {
+		var j Job
+		var started, finished sql.NullTime
+		var logFile, errMsg, errCode sql.NullString
+		if err := rows.Scan(&j.ID, &j.SyncPairID, &j.TriggerType, &j.Status,
+			&started, &finished, &logFile, &errMsg, &errCode,
+			&j.TotalSizeBytes, &j.SentBytes, &j.CreatedAt); err != nil {
+			return nil, err
+		}
+		if started.Valid {
+			j.StartedAt = &started.Time
+		}
+		if finished.Valid {
+			j.FinishedAt = &finished.Time
+		}
+		if logFile.Valid {
+			j.LogFile = &logFile.String
+		}
+		if errMsg.Valid {
+			j.ErrorMessage = &errMsg.String
+		}
+		if errCode.Valid {
+			j.ErrorCode = &errCode.String
+		}
+		jobs = append(jobs, j)
+	}
+	return jobs, rows.Err()
+}

internal/models/job_log.go

@@ -85,6 +85,19 @@ func (r *JobLogRepository) DeleteBefore(before time.Time) (int64, error) {
 	return res.RowsAffected()
 }
 
+func (r *JobLogRepository) TruncateKeepingHeaderTail(jobID int64, head, tail int) error {
+	_, err := r.db.Exec(`
+		DELETE FROM job_logs
+		WHERE job_id = ?
+		AND id NOT IN (
+			SELECT id FROM job_logs WHERE job_id = ? ORDER BY id ASC LIMIT ?
+			UNION ALL
+			SELECT id FROM job_logs WHERE job_id = ? ORDER BY id DESC LIMIT ?
+		)`,
+		jobID, jobID, head, jobID, tail)
+	return err
+}
+
 type JobWithStats struct {
 	Job
 	DurationSeconds *int64 `db:"duration_seconds" json:"duration_seconds"`
@@ -125,7 +138,7 @@ func (r *JobLogRepository) GetAllFiltered(limit, offset int, syncPairID *int64,
 		SELECT
 			j.id, j.sync_pair_id, j.trigger_type, j.status,
 			j.started_at, j.finished_at, j.log_file,
-			j.error_message, j.error_code, j.created_at,
+			j.error_message, j.error_code, j.total_size_bytes, j.sent_bytes, j.created_at,
 			CASE WHEN j.finished_at IS NOT NULL AND j.started_at IS NOT NULL
 				THEN (j.finished_at - j.started_at) ELSE NULL END as duration_seconds,
 			(SELECT COUNT(*) FROM job_logs WHERE job_id = j.id) as log_line_count
@@ -148,7 +161,7 @@ func (r *JobLogRepository) GetAllFiltered(limit, offset int, syncPairID *int64,
 		var durationSeconds sql.NullInt64
 		if err := rows.Scan(&j.ID, &j.SyncPairID, &j.TriggerType, &j.Status,
 			&started, &finished, &logFile,
-			&errMsg, &errCode, &j.CreatedAt,
+			&errMsg, &errCode, &j.TotalSizeBytes, &j.SentBytes, &j.CreatedAt,
 			&durationSeconds, &j.LogLineCount); err != nil {
 			return nil, 0, err
 		}

internal/models/machine.go

@@ -22,6 +22,7 @@ type Machine struct {
 	Status                      string     `db:"status" json:"status"`
 	LastSeenAt                  *time.Time `db:"last_seen_at" json:"last_seen_at"`
 	CreatedAt                   time.Time  `db:"created_at" json:"created_at"`
+	ShutdownCommand             string     `db:"shutdown_command" json:"shutdown_command"`
 }
 
 type MachineRepository struct {
@@ -36,11 +37,12 @@ func (r *MachineRepository) Create(m *Machine) (int64, error) {
 	res, err := r.db.Exec(`
 		INSERT INTO machines (name, host, port, ssh_user, ssh_key_id, mac_address,
 			wol_enabled, broadcast_addr, wake_timeout_seconds, wake_check_interval_seconds,
-			fingerprint_confirmed, host_key_fingerprint, status)
-		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+			fingerprint_confirmed, host_key_fingerprint, status, shutdown_command)
+		VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
 		m.Name, m.Host, m.Port, m.SSHUser, m.SSHKeyID, m.MACAddress,
 		boolToInt(m.WoLEnabled), m.BroadcastAddr, m.WakeTimeoutSeconds,
 		m.WakeCheckIntervalSeconds, boolToInt(m.FingerprintConfirmed), m.HostKeyFingerprint, m.Status,
+		m.ShutdownCommand,
 	)
 	if err != nil {
 		return 0, err
@@ -52,7 +54,7 @@ func (r *MachineRepository) GetAll() ([]Machine, error) {
 	rows, err := r.db.Query(`
 		SELECT id, name, host, port, ssh_user, ssh_key_id, mac_address,
 			wol_enabled, broadcast_addr, wake_timeout_seconds, wake_check_interval_seconds,
-			fingerprint_confirmed, host_key_fingerprint, status, last_seen_at, created_at
+			fingerprint_confirmed, host_key_fingerprint, status, last_seen_at, created_at, shutdown_command
 		FROM machines ORDER BY name`)
 	if err != nil {
 		return nil, err
@@ -69,7 +71,7 @@ func (r *MachineRepository) GetAll() ([]Machine, error) {
 		err := rows.Scan(&m.ID, &m.Name, &m.Host, &m.Port, &m.SSHUser, &keyID,
 			&mac, &m.WoLEnabled, &bcast, &m.WakeTimeoutSeconds,
 			&m.WakeCheckIntervalSeconds, &m.FingerprintConfirmed,
-			&hostKeyFP, &m.Status, &lastSeen, &m.CreatedAt)
+			&hostKeyFP, &m.Status, &lastSeen, &m.CreatedAt, &m.ShutdownCommand)
 		if err != nil {
 			return nil, err
 		}
@@ -103,12 +105,12 @@ func (r *MachineRepository) GetByID(id int64) (*Machine, error) {
 	err := r.db.QueryRow(`
 		SELECT id, name, host, port, ssh_user, ssh_key_id, mac_address,
 			wol_enabled, broadcast_addr, wake_timeout_seconds, wake_check_interval_seconds,
-			fingerprint_confirmed, host_key_fingerprint, status, last_seen_at, created_at
+			fingerprint_confirmed, host_key_fingerprint, status, last_seen_at, created_at, shutdown_command
 		FROM machines WHERE id = ?`, id).Scan(
 		&m.ID, &m.Name, &m.Host, &m.Port, &m.SSHUser, &keyID,
 		&mac, &m.WoLEnabled, &bcast, &m.WakeTimeoutSeconds,
 		&m.WakeCheckIntervalSeconds, &m.FingerprintConfirmed,
-		&hostKeyFP, &m.Status, &lastSeen, &m.CreatedAt)
+		&hostKeyFP, &m.Status, &lastSeen, &m.CreatedAt, &m.ShutdownCommand)
 	if err != nil {
 		return nil, err
 	}
@@ -135,12 +137,13 @@ func (r *MachineRepository) Update(m *Machine) error {
 	_, err := r.db.Exec(`
 		UPDATE machines SET name=?, host=?, port=?, ssh_user=?, ssh_key_id=?,
 			mac_address=?, wol_enabled=?, broadcast_addr=?, wake_timeout_seconds=?,
-			wake_check_interval_seconds=?, fingerprint_confirmed=?, host_key_fingerprint=?, status=?, last_seen_at=?
+			wake_check_interval_seconds=?, fingerprint_confirmed=?, host_key_fingerprint=?, status=?, last_seen_at=?,
+			shutdown_command=?
 		WHERE id=?`,
 		m.Name, m.Host, m.Port, m.SSHUser, m.SSHKeyID, m.MACAddress,
 		boolToInt(m.WoLEnabled), m.BroadcastAddr, m.WakeTimeoutSeconds,
 		m.WakeCheckIntervalSeconds, boolToInt(m.FingerprintConfirmed), m.HostKeyFingerprint,
-		m.Status, m.LastSeenAt, m.ID,
+		m.Status, m.LastSeenAt, m.ShutdownCommand, m.ID,
 	)
 	return err
 }

internal/models/models_test.go

@@ -0,0 +1,602 @@
+package models
+
+import (
+	"database/sql"
+	"os"
+	"testing"
+	"time"
+
+	_ "modernc.org/sqlite"
+)
+
+func openTestDB(t *testing.T) *sql.DB {
+	db, err := sql.Open("sqlite", ":memory:")
+	if err != nil {
+		t.Fatalf("failed to open in-memory db: %v", err)
+	}
+
+	migrations := []string{initSchema, migration002, migration003, migration004, migration005, migration006}
+	for _, m := range migrations {
+		if _, err := db.Exec(m); err != nil {
+			t.Fatalf("failed to apply migration: %v", err)
+		}
+	}
+
+	return db
+}
+
+const initSchema = `
+CREATE TABLE IF NOT EXISTS users (
+    id          INTEGER PRIMARY KEY AUTOINCREMENT,
+    username    TEXT UNIQUE NOT NULL,
+    password_hash TEXT NOT NULL,
+    role        TEXT NOT NULL DEFAULT 'user',
+    created_at  DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS ssh_keys (
+    id          INTEGER PRIMARY KEY AUTOINCREMENT,
+    label       TEXT NOT NULL,
+    private_key_path TEXT NOT NULL,
+    public_key  TEXT NOT NULL,
+    created_at  DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS machines (
+    id                          INTEGER PRIMARY KEY AUTOINCREMENT,
+    name                        TEXT NOT NULL,
+    host                        TEXT NOT NULL,
+    port                        INTEGER NOT NULL DEFAULT 22,
+    ssh_user                    TEXT NOT NULL DEFAULT 'root',
+    ssh_key_id                  INTEGER REFERENCES ssh_keys(id),
+    mac_address                 TEXT,
+    wol_enabled                 INTEGER NOT NULL DEFAULT 0,
+    broadcast_addr              TEXT,
+    wake_timeout_seconds        INTEGER NOT NULL DEFAULT 120,
+    wake_check_interval_seconds INTEGER NOT NULL DEFAULT 5,
+    fingerprint_confirmed       INTEGER NOT NULL DEFAULT 0,
+    status                      TEXT NOT NULL DEFAULT 'unknown',
+    last_seen_at                DATETIME,
+    created_at                  DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS sync_pairs (
+    id                  INTEGER PRIMARY KEY AUTOINCREMENT,
+    name                TEXT NOT NULL,
+    source_machine_id   INTEGER REFERENCES machines(id),
+    source_path         TEXT NOT NULL,
+    dest_machine_id     INTEGER REFERENCES machines(id),
+    dest_path           TEXT NOT NULL,
+    direction           TEXT NOT NULL DEFAULT 'push',
+    rsync_flags         TEXT NOT NULL DEFAULT '-aP',
+    exclude_patterns    TEXT NOT NULL DEFAULT '',
+    enabled             INTEGER NOT NULL DEFAULT 1,
+    created_at          DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS schedules (
+    id              INTEGER PRIMARY KEY AUTOINCREMENT,
+    sync_pair_id    INTEGER NOT NULL REFERENCES sync_pairs(id) ON DELETE CASCADE,
+    cron_expr       TEXT NOT NULL,
+    next_run_at     DATETIME,
+    enabled         INTEGER NOT NULL DEFAULT 1,
+    created_at      DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS jobs (
+    id              INTEGER PRIMARY KEY AUTOINCREMENT,
+    sync_pair_id    INTEGER NOT NULL REFERENCES sync_pairs(id),
+    trigger_type    TEXT NOT NULL DEFAULT 'manual',
+    status          TEXT NOT NULL DEFAULT 'queued',
+    started_at      DATETIME,
+    finished_at     DATETIME,
+    log_file        TEXT,
+    created_at      DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS job_logs (
+    id          INTEGER PRIMARY KEY AUTOINCREMENT,
+    job_id      INTEGER NOT NULL REFERENCES jobs(id) ON DELETE CASCADE,
+    stream      TEXT NOT NULL,
+    content     TEXT NOT NULL,
+    timestamp   DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE IF NOT EXISTS sessions (
+    id          TEXT PRIMARY KEY,
+    user_id     INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    token_hash  TEXT NOT NULL,
+    expires_at  DATETIME NOT NULL,
+    revoked     INTEGER NOT NULL DEFAULT 0,
+    created_at  DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+`
+
+const migration002 = `
+CREATE INDEX IF NOT EXISTS idx_job_logs_job_id ON job_logs(job_id);
+CREATE INDEX IF NOT EXISTS idx_jobs_status_created ON jobs(status, created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_jobs_sync_pair_id ON jobs(sync_pair_id);
+
+CREATE TABLE IF NOT EXISTS cleanup_history (
+    id              INTEGER PRIMARY KEY AUTOINCREMENT,
+    deleted_before  DATETIME NOT NULL,
+    logs_purged     INTEGER NOT NULL DEFAULT 0,
+    jobs_purged     INTEGER NOT NULL DEFAULT 0,
+    executed_at     DATETIME DEFAULT CURRENT_TIMESTAMP
+);
+`
+
+const migration003 = `
+ALTER TABLE jobs ADD COLUMN error_message TEXT;
+ALTER TABLE jobs ADD COLUMN error_code TEXT;
+`
+
+const migration004 = `
+ALTER TABLE machines ADD COLUMN host_key_fingerprint TEXT;
+`
+
+const migration005 = `
+ALTER TABLE machines ADD COLUMN shutdown_command TEXT NOT NULL DEFAULT 'shutdown now';
+`
+
+const migration006 = `
+ALTER TABLE jobs ADD COLUMN total_size_bytes INTEGER DEFAULT 0;
+ALTER TABLE jobs ADD COLUMN sent_bytes INTEGER DEFAULT 0;
+`
+
+func TestJobRepository_CreateAndGetByID(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewJobRepository(db)
+
+	id, err := repo.Create(1, "manual", "queued")
+	if err != nil {
+		t.Fatalf("Create failed: %v", err)
+	}
+
+	job, err := repo.GetByID(id)
+	if err != nil {
+		t.Fatalf("GetByID failed: %v", err)
+	}
+
+	if job.ID != id {
+		t.Errorf("expected ID %d, got %d", id, job.ID)
+	}
+	if job.SyncPairID != 1 {
+		t.Errorf("expected SyncPairID 1, got %d", job.SyncPairID)
+	}
+	if job.TriggerType != "manual" {
+		t.Errorf("expected trigger_type 'manual', got %q", job.TriggerType)
+	}
+	if job.Status != "queued" {
+		t.Errorf("expected status 'queued', got %q", job.Status)
+	}
+}
+
+func TestJobRepository_UpdateStatus_SetsStartedAt(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewJobRepository(db)
+	id, _ := repo.Create(1, "manual", "queued")
+
+	err := repo.UpdateStatus(id, "running")
+	if err != nil {
+		t.Fatalf("UpdateStatus failed: %v", err)
+	}
+
+	job, _ := repo.GetByID(id)
+	if job.StartedAt == nil {
+		t.Fatal("expected StartedAt to be set for 'running' status")
+	}
+	if job.Status != "running" {
+		t.Errorf("expected status 'running', got %q", job.Status)
+	}
+}
+
+func TestJobRepository_UpdateStatus_SetsFinishedAt(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewJobRepository(db)
+	id, _ := repo.Create(1, "manual", "queued")
+	repo.UpdateStatus(id, "running")
+
+	err := repo.UpdateStatus(id, "success")
+	if err != nil {
+		t.Fatalf("UpdateStatus failed: %v", err)
+	}
+
+	job, _ := repo.GetByID(id)
+	if job.FinishedAt == nil {
+		t.Fatal("expected FinishedAt to be set for 'success' status")
+	}
+	if job.Status != "success" {
+		t.Errorf("expected status 'success', got %q", job.Status)
+	}
+}
+
+func TestJobRepository_UpdateStatus_Failed(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewJobRepository(db)
+	id, _ := repo.Create(1, "manual", "queued")
+	repo.UpdateStatus(id, "running")
+
+	err := repo.UpdateStatus(id, "failed")
+	if err != nil {
+		t.Fatalf("UpdateStatus failed: %v", err)
+	}
+
+	job, _ := repo.GetByID(id)
+	if job.FinishedAt == nil {
+		t.Fatal("expected FinishedAt to be set for 'failed' status")
+	}
+}
+
+func TestJobRepository_SetError(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewJobRepository(db)
+	id, _ := repo.Create(1, "manual", "queued")
+
+	err := repo.SetError(id, "EIO", "disk read failed")
+	if err != nil {
+		t.Fatalf("SetError failed: %v", err)
+	}
+
+	job, _ := repo.GetByID(id)
+	if job.ErrorCode == nil || *job.ErrorCode != "EIO" {
+		t.Errorf("expected error_code 'EIO', got %v", job.ErrorCode)
+	}
+	if job.ErrorMessage == nil || *job.ErrorMessage != "disk read failed" {
+		t.Errorf("expected error_message 'disk read failed', got %v", job.ErrorMessage)
+	}
+}
+
+func TestJobRepository_GetByStatusAny(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewJobRepository(db)
+	_, _ = repo.Create(1, "manual", "queued")
+	id2, _ := repo.Create(1, "manual", "running")
+	_, _ = repo.Create(1, "manual", "success")
+
+	jobs, err := repo.GetByStatusAny([]string{"running"})
+	if err != nil {
+		t.Fatalf("GetByStatusAny failed: %v", err)
+	}
+	if len(jobs) != 1 {
+		t.Fatalf("expected 1 job, got %d", len(jobs))
+	}
+	if jobs[0].ID != id2 {
+		t.Errorf("expected job ID %d, got %d", id2, jobs[0].ID)
+	}
+
+	jobs, _ = repo.GetByStatusAny([]string{"queued", "running"})
+	if len(jobs) != 2 {
+		t.Fatalf("expected 2 jobs, got %d", len(jobs))
+	}
+}
+
+func TestJobRepository_DeleteFinishedBefore(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewJobRepository(db)
+
+	id1, _ := repo.Create(1, "manual", "queued")
+	repo.UpdateStatus(id1, "running")
+	repo.UpdateStatus(id1, "success")
+
+	db.Exec("UPDATE jobs SET finished_at = datetime('2020-01-01 00:00:00') WHERE id = ?", id1)
+
+	id2, _ := repo.Create(1, "manual", "queued")
+	repo.UpdateStatus(id2, "running")
+	repo.UpdateStatus(id2, "success")
+
+	cutoff := time.Now()
+	deleted, err := repo.DeleteFinishedBefore(cutoff)
+	if err != nil {
+		t.Fatalf("DeleteFinishedBefore failed: %v", err)
+	}
+	if deleted != 1 {
+		t.Errorf("expected 1 deleted, got %d", deleted)
+	}
+
+	_, err = repo.GetByID(id1)
+	if err != sql.ErrNoRows {
+		t.Errorf("expected id1 to be deleted")
+	}
+
+	_, err = repo.GetByID(id2)
+	if err != nil {
+		t.Errorf("expected id2 to still exist")
+	}
+}
+
+func TestJobRepository_SetTotals(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewJobRepository(db)
+	id, _ := repo.Create(1, "manual", "queued")
+
+	err := repo.SetTotals(id, 1024, 512)
+	if err != nil {
+		t.Fatalf("SetTotals failed: %v", err)
+	}
+
+	job, _ := repo.GetByID(id)
+	if job.TotalSizeBytes != 1024 {
+		t.Errorf("expected TotalSizeBytes 1024, got %d", job.TotalSizeBytes)
+	}
+	if job.SentBytes != 512 {
+		t.Errorf("expected SentBytes 512, got %d", job.SentBytes)
+	}
+}
+
+func TestMachineRepository_CreateAndGetByID(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewMachineRepository(db)
+
+	mac := "AA:BB:CC:DD:EE:FF"
+	bcast := "192.168.1.255"
+WolEnabled := true
+WolTimeout := 300
+
+	machine := &Machine{
+		Name:                 "test-machine",
+		Host:                 "192.168.1.10",
+		Port:                 22,
+		SSHUser:              "admin",
+		MACAddress:           &mac,
+		WoLEnabled:           WolEnabled,
+		BroadcastAddr:        &bcast,
+		WakeTimeoutSeconds:   WolTimeout,
+		WakeCheckIntervalSeconds: 10,
+		Status:               "unknown",
+		ShutdownCommand:      "shutdown -h now",
+	}
+
+	id, err := repo.Create(machine)
+	if err != nil {
+		t.Fatalf("Create failed: %v", err)
+	}
+
+	retrieved, err := repo.GetByID(id)
+	if err != nil {
+		t.Fatalf("GetByID failed: %v", err)
+	}
+
+	if retrieved.Name != "test-machine" {
+		t.Errorf("expected name 'test-machine', got %q", retrieved.Name)
+	}
+	if retrieved.Host != "192.168.1.10" {
+		t.Errorf("expected host '192.168.1.10', got %q", retrieved.Host)
+	}
+	if retrieved.MACAddress == nil || *retrieved.MACAddress != mac {
+		t.Errorf("expected MAC %q, got %v", mac, retrieved.MACAddress)
+	}
+	if !retrieved.WoLEnabled {
+		t.Error("expected WoLEnabled to be true")
+	}
+	if retrieved.BroadcastAddr == nil || *retrieved.BroadcastAddr != bcast {
+		t.Errorf("expected broadcast %q, got %v", bcast, retrieved.BroadcastAddr)
+	}
+	if retrieved.WakeTimeoutSeconds != WolTimeout {
+		t.Errorf("expected wake timeout %d, got %d", WolTimeout, retrieved.WakeTimeoutSeconds)
+	}
+	if retrieved.ShutdownCommand != "shutdown -h now" {
+		t.Errorf("expected shutdown command 'shutdown -h now', got %q", retrieved.ShutdownCommand)
+	}
+}
+
+func TestMachineRepository_UpdateStatus(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewMachineRepository(db)
+	id, _ := repo.Create(&Machine{Name: "test", Host: "192.168.1.1", Status: "unknown"})
+
+	err := repo.UpdateStatus(id, "online")
+	if err != nil {
+		t.Fatalf("UpdateStatus failed: %v", err)
+	}
+
+	machine, _ := repo.GetByID(id)
+	if machine.Status != "online" {
+		t.Errorf("expected status 'online', got %q", machine.Status)
+	}
+	if machine.LastSeenAt == nil {
+		t.Error("expected LastSeenAt to be set")
+	}
+}
+
+func TestMachineRepository_GetAll(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewMachineRepository(db)
+	repo.Create(&Machine{Name: "machine-a", Host: "192.168.1.1", Status: "online"})
+	repo.Create(&Machine{Name: "machine-b", Host: "192.168.1.2", Status: "offline"})
+
+	machines, err := repo.GetAll()
+	if err != nil {
+		t.Fatalf("GetAll failed: %v", err)
+	}
+	if len(machines) != 2 {
+		t.Errorf("expected 2 machines, got %d", len(machines))
+	}
+}
+
+func TestSyncPairRepository_CreateAndGetByID(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewSyncPairRepository(db)
+
+	sp := &SyncPair{
+		Name:            "backup-data",
+		SourcePath:      "/data",
+		DestPath:        "/backup",
+		Direction:       "push",
+		RsyncFlags:      "-aP --delete",
+		ExcludePatterns: "*.tmp\n*.log",
+		Enabled:         true,
+	}
+
+	id, err := repo.Create(sp)
+	if err != nil {
+		t.Fatalf("Create failed: %v", err)
+	}
+
+	retrieved, err := repo.GetByID(id)
+	if err != nil {
+		t.Fatalf("GetByID failed: %v", err)
+	}
+
+	if retrieved.Name != "backup-data" {
+		t.Errorf("expected name 'backup-data', got %q", retrieved.Name)
+	}
+	if retrieved.ExcludePatterns != "*.tmp\n*.log" {
+		t.Errorf("expected exclude patterns '*.tmp\\n*.log', got %q", retrieved.ExcludePatterns)
+	}
+}
+
+func TestSyncPairRepository_ExcludePatternsList(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewSyncPairRepository(db)
+
+	sp := &SyncPair{
+		Name:            "test-pair",
+		SourcePath:      "/src",
+		DestPath:        "/dst",
+		ExcludePatterns: "*.tmp\n *.log\n  \n*.bak",
+	}
+
+	id, _ := repo.Create(sp)
+	retrieved, _ := repo.GetByID(id)
+
+	patterns := retrieved.ExcludePatternsList()
+	if len(patterns) != 3 {
+		t.Fatalf("expected 3 patterns, got %d: %v", len(patterns), patterns)
+	}
+	if patterns[0] != "*.tmp" {
+		t.Errorf("expected first pattern '*.tmp', got %q", patterns[0])
+	}
+	if patterns[1] != "*.log" {
+		t.Errorf("expected second pattern '*.log', got %q", patterns[1])
+	}
+	if patterns[2] != "*.bak" {
+		t.Errorf("expected third pattern '*.bak', got %q", patterns[2])
+	}
+}
+
+func TestSyncPairRepository_GetAll(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewSyncPairRepository(db)
+	repo.Create(&SyncPair{Name: "pair-a", SourcePath: "/a", DestPath: "/b"})
+	repo.Create(&SyncPair{Name: "pair-b", SourcePath: "/c", DestPath: "/d"})
+
+	pairs, err := repo.GetAll()
+	if err != nil {
+		t.Fatalf("GetAll failed: %v", err)
+	}
+	if len(pairs) != 2 {
+		t.Errorf("expected 2 pairs, got %d", len(pairs))
+	}
+}
+
+func TestScheduleRepository_CreateAndGetByID(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewScheduleRepository(db)
+
+	nextRun := time.Now().Add(1 * time.Hour)
+	sched := &Schedule{
+		SyncPairID: 1,
+		CronExpr:   "0 0 * * *",
+		NextRunAt:  &nextRun,
+		Enabled:    true,
+	}
+
+	id, err := repo.Create(sched)
+	if err != nil {
+		t.Fatalf("Create failed: %v", err)
+	}
+
+	retrieved, err := repo.GetByID(id)
+	if err != nil {
+		t.Fatalf("GetByID failed: %v", err)
+	}
+
+	if retrieved.CronExpr != "0 0 * * *" {
+		t.Errorf("expected cron '0 0 * * *', got %q", retrieved.CronExpr)
+	}
+	if !retrieved.Enabled {
+		t.Error("expected enabled to be true")
+	}
+}
+
+func TestScheduleRepository_UpdateEnabled(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewScheduleRepository(db)
+
+	nextRun := time.Now().Add(1 * time.Hour)
+	id, _ := repo.Create(&Schedule{SyncPairID: 1, CronExpr: "0 0 * * *", NextRunAt: &nextRun, Enabled: true})
+
+	sched, _ := repo.GetByID(id)
+	sched.Enabled = false
+	err := repo.Update(sched)
+	if err != nil {
+		t.Fatalf("Update failed: %v", err)
+	}
+
+	retrieved, _ := repo.GetByID(id)
+	if retrieved.Enabled {
+		t.Error("expected enabled to be false after update")
+	}
+}
+
+func TestScheduleRepository_GetEnabledDue(t *testing.T) {
+	db := openTestDB(t)
+	defer db.Close()
+
+	repo := NewScheduleRepository(db)
+
+	pastRun := time.Now().Add(-1 * time.Hour)
+	futureRun := time.Now().Add(1 * time.Hour)
+
+	_, _ = repo.Create(&Schedule{SyncPairID: 1, CronExpr: "0 0 * * *", NextRunAt: &pastRun, Enabled: true})
+	_, _ = repo.Create(&Schedule{SyncPairID: 2, CronExpr: "0 0 * * *", NextRunAt: &futureRun, Enabled: true})
+	_, _ = repo.Create(&Schedule{SyncPairID: 3, CronExpr: "0 0 * * *", NextRunAt: &pastRun, Enabled: false})
+
+	due, err := repo.GetEnabledDue(time.Now())
+	if err != nil {
+		t.Fatalf("GetEnabledDue failed: %v", err)
+	}
+	if len(due) != 1 {
+		t.Errorf("expected 1 due schedule, got %d", len(due))
+	}
+	if due[0].SyncPairID != 1 {
+		t.Errorf("expected sync_pair_id 1, got %d", due[0].SyncPairID)
+	}
+}
+
+func TestMain(m *testing.M) {
+	os.Exit(m.Run())
+}

internal/scheduler/scheduler.go

@@ -3,7 +3,12 @@ package scheduler
 import (
 	"context"
 	"database/sql"
+	"fmt"
 	"log/slog"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
 	"sync"
 	"time"
 
@@ -124,6 +129,10 @@ func (s *Scheduler) cleanup() {
 	}
 	before := time.Now().AddDate(0, 0, -retentionDays)
 
+	if s.cfg.Scheduler.BackupDir != "" {
+		s.backupDB(before)
+	}
+
 	logRepo := models.NewJobLogRepository(s.db)
 	jobRepo := models.NewJobRepository(s.db)
 
@@ -141,5 +150,78 @@ func (s *Scheduler) cleanup() {
 
 	if deletedLogs > 0 || deletedJobs > 0 {
 		slog.Info("cleanup: purged old records", "logs_deleted", deletedLogs, "jobs_deleted", deletedJobs, "before", before.Format("2006-01-02"))
+		s.purgeJobLogFiles(before)
+	}
+
+	s.purgeOldBackups()
+}
+
+func (s *Scheduler) backupDB(before time.Time) {
+	backupDir := s.cfg.Scheduler.BackupDir
+	if backupDir == "" {
+		return
+	}
+	if err := os.MkdirAll(backupDir, 0700); err != nil {
+		slog.Error("cleanup: failed to create backup dir", "error", err)
+		return
+	}
+	ts := time.Now().UTC().Format("20060102-150405")
+	backupPath := filepath.Join(backupDir, fmt.Sprintf("syncserver-%s.db", ts))
+	if _, err := s.db.Exec(fmt.Sprintf("VACUUM INTO '%s'", backupPath)); err != nil {
+		slog.Error("cleanup: failed to vacuum into backup", "path", backupPath, "error", err)
+		return
+	}
+	slog.Info("cleanup: database backup created", "path", backupPath)
+}
+
+func (s *Scheduler) purgeJobLogFiles(before time.Time) {
+	logsDir := s.cfg.LogsDir()
+	entries, err := os.ReadDir(logsDir)
+	if err != nil {
+		return
+	}
+	for _, entry := range entries {
+		if entry.IsDir() || !strings.HasSuffix(entry.Name(), ".log") {
+			continue
+		}
+		jobID := strings.TrimSuffix(entry.Name(), ".log")
+		id, err := strconv.ParseInt(jobID, 10, 64)
+		if err != nil {
+			continue
+		}
+		jobRepo := models.NewJobRepository(s.db)
+		job, err := jobRepo.GetByID(id)
+		if err != nil || job == nil {
+			os.Remove(filepath.Join(logsDir, entry.Name()))
+			continue
+		}
+		if job.FinishedAt != nil && job.FinishedAt.Before(before) {
+			os.Remove(filepath.Join(logsDir, entry.Name()))
+		}
+	}
+}
+
+func (s *Scheduler) purgeOldBackups() {
+	backupDir := s.cfg.Scheduler.BackupDir
+	retention := s.cfg.Scheduler.BackupRetentionDays
+	if backupDir == "" || retention <= 0 {
+		return
+	}
+	cutoff := time.Now().AddDate(0, 0, -retention)
+	entries, err := os.ReadDir(backupDir)
+	if err != nil {
+		return
+	}
+	for _, entry := range entries {
+		if entry.IsDir() || !strings.HasSuffix(entry.Name(), ".db") {
+			continue
+		}
+		info, err := entry.Info()
+		if err != nil {
+			continue
+		}
+		if info.ModTime().Before(cutoff) {
+			os.Remove(filepath.Join(backupDir, entry.Name()))
+		}
 	}
 }

internal/sshmanager/deploy.go

@@ -0,0 +1,167 @@
+package sshmanager
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"log/slog"
+	"os"
+	"path/filepath"
+	"time"
+
+	"golang.org/x/crypto/ssh"
+)
+
+type DeployKey struct {
+	LocalPath  string
+	RemotePath string
+	Mode       uint32
+}
+
+type DeployResult struct {
+	Success  bool     `json:"success"`
+	Messages []string `json:"messages"`
+	Errors   []string `json:"errors"`
+}
+
+func DeployKeysToMachine(ctx context.Context, serverKeyPath string, host string, port int, user string, keys []DeployKey, knownHostsHosts []string, sshDir string) (*DeployResult, error) {
+	result := &DeployResult{Success: true, Messages: []string{}, Errors: []string{}}
+
+	addr := fmt.Sprintf("%s:%d", host, port)
+
+	keyData, err := os.ReadFile(serverKeyPath)
+	if err != nil {
+		return nil, fmt.Errorf("reading server key: %w", err)
+	}
+	signer, err := ssh.ParsePrivateKey(keyData)
+	if err != nil {
+		return nil, fmt.Errorf("parsing server key: %w", err)
+	}
+
+	knownHostsPath := filepath.Join(sshDir, "known_hosts")
+	hostKeyCallback, err := NewKnownHostsCallback(knownHostsPath, true)
+	if err != nil {
+		slog.Warn("deploy keys: creating host key callback failed, ignoring hosts", "error", err)
+		hostKeyCallback = ssh.InsecureIgnoreHostKey()
+	}
+
+	cfg := &ssh.ClientConfig{
+		User:            user,
+		Auth:            []ssh.AuthMethod{ssh.PublicKeys(signer)},
+		HostKeyCallback: hostKeyCallback,
+		Timeout:         10 * time.Second,
+	}
+
+	ctx, cancel := context.WithTimeout(ctx, 60*time.Second)
+	defer cancel()
+
+	conn, err := ssh.Dial("tcp", addr, cfg)
+	if err != nil {
+		slog.Warn("deploy keys: SSH dial failed", "host", addr, "error", err)
+		return &DeployResult{Success: false, Messages: []string{}, Errors: []string{fmt.Sprintf("connecting to %s: %v", addr, err)}}, nil
+	}
+	defer conn.Close()
+
+	remoteSSHDir := sshDir
+	remoteKeysDir := filepath.Join(remoteSSHDir, "keys")
+
+	session, err := conn.NewSession()
+	if err != nil {
+		return nil, fmt.Errorf("creating session: %w", err)
+	}
+	defer session.Close()
+
+	var stdout, stderr bytes.Buffer
+	session.Stdout = &stdout
+	session.Stderr = &stderr
+
+	if err := session.Run(fmt.Sprintf("mkdir -p %s && chmod 700 %s", remoteKeysDir, remoteKeysDir)); err != nil {
+		return nil, fmt.Errorf("creating remote ssh dir: %s %w", stderr.String(), err)
+	}
+	result.Messages = append(result.Messages, fmt.Sprintf("Created %s on %s", remoteKeysDir, host))
+
+	for _, k := range keys {
+		keyContent, err := os.ReadFile(k.LocalPath)
+		if err != nil {
+			result.Errors = append(result.Errors, fmt.Sprintf("reading local key %s: %v", k.LocalPath, err))
+			result.Success = false
+			continue
+		}
+
+		mode := k.Mode
+		if mode == 0 {
+			mode = 0600
+		}
+
+		sess2, err := conn.NewSession()
+		if err != nil {
+			result.Errors = append(result.Errors, fmt.Sprintf("session for key upload: %v", err))
+			result.Success = false
+			continue
+		}
+		defer sess2.Close()
+
+		sess2.Stdout = &stdout
+		sess2.Stderr = &stderr
+
+		slog.Debug("deploy: uploading key", "local", k.LocalPath, "remote", k.RemotePath, "host", host)
+
+		cmd := fmt.Sprintf("cat > %s && chmod 0%o %s", k.RemotePath, mode, k.RemotePath)
+
+		stdin, err := sess2.StdinPipe()
+		if err != nil {
+			result.Errors = append(result.Errors, fmt.Sprintf("stdin pipe for %s: %v", k.RemotePath, err))
+			result.Success = false
+			sess2.Close()
+			continue
+		}
+
+		if err := sess2.Start(cmd); err != nil {
+			result.Errors = append(result.Errors, fmt.Sprintf("starting command for %s: %v", k.RemotePath, err))
+			result.Success = false
+			sess2.Close()
+			continue
+		}
+
+		_, err = stdin.Write(keyContent)
+		if err != nil {
+			result.Errors = append(result.Errors, fmt.Sprintf("writing key %s: %v", k.RemotePath, err))
+			result.Success = false
+			stdin.Close()
+			sess2.Close()
+			continue
+		}
+		stdin.Close()
+
+		if err := sess2.Wait(); err != nil {
+			result.Errors = append(result.Errors, fmt.Sprintf("uploading %s: %v (stderr: %s)", k.RemotePath, err, stderr.String()))
+			result.Success = false
+			continue
+		}
+
+		result.Messages = append(result.Messages, fmt.Sprintf("Uploaded %s to %s:%s", filepath.Base(k.LocalPath), host, k.RemotePath))
+	}
+
+		if len(knownHostsHosts) > 0 {
+		for _, khHost := range knownHostsHosts {
+			session2, err := conn.NewSession()
+			if err != nil {
+				result.Errors = append(result.Errors, fmt.Sprintf("session for ssh-keyscan %s: %v", khHost, err))
+				continue
+			}
+			session2.Stdout = &stdout
+			session2.Stderr = &stderr
+			err = session2.Run(fmt.Sprintf("ssh-keyscan -H -p %s 2>/dev/null >> %s/known_hosts", khHost, remoteSSHDir))
+			session2.Close()
+			if err != nil {
+				slog.Warn("deploy: ssh-keyscan failed", "host", khHost, "error", err)
+				result.Errors = append(result.Errors, fmt.Sprintf("ssh-keyscan %s: %v (stderr: %s)", khHost, err, stderr.String()))
+			} else {
+				result.Messages = append(result.Messages, fmt.Sprintf("Populated known_hosts with %s", khHost))
+			}
+		}
+	}
+
+	slog.Info("deploy keys result", "host", host, "success", result.Success, "messages", len(result.Messages), "errors", len(result.Errors))
+	return result, nil
+}

internal/sshmanager/knownhosts.go

@@ -8,6 +8,7 @@ import (
 	"strings"
 
 	"golang.org/x/crypto/ssh"
+	"golang.org/x/crypto/ssh/knownhosts"
 )
 
 type KnownHost struct {
@@ -17,6 +18,23 @@ type KnownHost struct {
 	Fingerprint string
 }
 
+func NewKnownHostsCallback(knownHostsPath string, strictHostKeyChecking bool) (ssh.HostKeyCallback, error) {
+	if !strictHostKeyChecking {
+		return ssh.InsecureIgnoreHostKey(), nil
+	}
+	if knownHostsPath == "" {
+		return ssh.InsecureIgnoreHostKey(), nil
+	}
+	_, err := os.Stat(knownHostsPath)
+	if os.IsNotExist(err) {
+		return ssh.InsecureIgnoreHostKey(), nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	return knownhosts.New(knownHostsPath)
+}
+
 func EnsureKnownHosts(sshDir string) (string, error) {
 	path := filepath.Join(sshDir, "known_hosts")
 	f, err := os.OpenFile(path, os.O_CREATE|os.O_RDONLY, 0644)
@@ -27,6 +45,8 @@ func EnsureKnownHosts(sshDir string) (string, error) {
 	return path, nil
 }
 
+// AddKnownHost stores the host key in standard ssh known_hosts format (hostname keytype base64key).
+// NOTE: Existing entries in known_hosts may need to be regenerated if they were stored in a different format.
 func AddKnownHost(sshDir, host string, port int, keyData []byte) error {
 	path := filepath.Join(sshDir, "known_hosts")
 	f, err := os.OpenFile(path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)

internal/sshmanager/shutdown.go

@@ -0,0 +1,82 @@
+package sshmanager
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"strings"
+	"time"
+)
+
+type ShutdownResult struct {
+	Success bool
+	Output  string
+	Error   string
+}
+
+func IsShutdownCommand(cmd string) bool {
+	c := strings.TrimSpace(strings.ToLower(cmd))
+	for _, p := range []string{
+		"shutdown", "poweroff", "halt", "reboot",
+		"sudo shutdown", "sudo poweroff", "sudo halt", "sudo reboot",
+		"systemctl poweroff", "systemctl halt", "systemctl reboot",
+	} {
+		if strings.HasPrefix(c, p) {
+			return true
+		}
+	}
+	return false
+}
+
+func RunRemoteCommand(ctx context.Context, host string, port int, user, privKeyPath, knownHostsPath string, strictHostKeyChecking bool, command string) (*ShutdownResult, error) {
+	conn, _, _, err := dialSSH(ctx, host, port, user, privKeyPath, knownHostsPath, strictHostKeyChecking)
+	if err != nil {
+		return &ShutdownResult{Success: false, Error: err.Error()}, nil
+	}
+	defer conn.Close()
+
+	session, err := conn.NewSession()
+	if err != nil {
+		return &ShutdownResult{Success: false, Error: fmt.Sprintf("session: %v", err)}, nil
+	}
+	defer session.Close()
+
+	var stdout, stderr bytes.Buffer
+	session.Stdout = &stdout
+	session.Stderr = &stderr
+
+	effectiveCmd := command
+	if IsShutdownCommand(command) {
+		effectiveCmd = fmt.Sprintf(
+			"nohup %s >/dev/null 2>&1 </dev/null & sleep 1; echo shutdown_initiated",
+			command,
+		)
+	}
+
+	ctx, cancel := context.WithTimeout(ctx, 15*time.Second)
+	defer cancel()
+
+	done := make(chan error, 1)
+	go func() {
+		done <- session.Run(effectiveCmd)
+	}()
+
+	select {
+	case err := <-done:
+		if err != nil {
+			return &ShutdownResult{
+				Success: false,
+				Error:   fmt.Sprintf("exec: %v, stderr: %s", err, stderr.String()),
+			}, nil
+		}
+		return &ShutdownResult{
+			Success: true,
+			Output:  stdout.String(),
+		}, nil
+	case <-ctx.Done():
+		return &ShutdownResult{
+			Success: false,
+			Error:   "command timed out after 15 seconds",
+		}, nil
+	}
+}

internal/sshmanager/testconn.go

@@ -8,7 +8,6 @@ import (
 	"fmt"
 	"net"
 	"os"
-	"path/filepath"
 	"strings"
 	"time"
 
@@ -22,40 +21,35 @@ type ConnResult struct {
 	Fingerprint string
 }
 
-func TestSSHConnection(ctx context.Context, host string, port int, user, privKeyPath, knownHostsPath string, strictHostKeyChecking bool) (*ConnResult, error) {
+func dialSSH(ctx context.Context, host string, port int, user, privKeyPath, knownHostsPath string, strictHostKeyChecking bool) (*ssh.Client, string, ssh.PublicKey, error) {
 	addr := fmt.Sprintf("%s:%d", host, port)
 
 	auths := []ssh.AuthMethod{}
 	if privKeyPath != "" {
 		key, err := os.ReadFile(privKeyPath)
 		if err != nil {
-			return nil, fmt.Errorf("reading private key: %w", err)
+			return nil, "", nil, fmt.Errorf("reading private key: %w", err)
 		}
 		signer, err := ssh.ParsePrivateKey(key)
 		if err != nil {
-			return nil, fmt.Errorf("parsing private key: %w", err)
+			return nil, "", nil, fmt.Errorf("parsing private key: %w", err)
 		}
 		auths = append(auths, ssh.PublicKeys(signer))
 	}
 
 	var capturedFingerprint string
+	var capturedPubKey ssh.PublicKey
+
+	callback, err := NewKnownHostsCallback(knownHostsPath, strictHostKeyChecking)
+	if err != nil {
+		return nil, "", nil, fmt.Errorf("creating host key callback: %w", err)
+	}
+
 	hostKeyCallback := func(hostname string, remote net.Addr, key ssh.PublicKey) error {
 		h := sha256.Sum256(key.Marshal())
 		capturedFingerprint = "SHA256:" + base64.RawStdEncoding.EncodeToString(h[:])
-		if strictHostKeyChecking && knownHostsPath != "" {
-			kh, err := GetKnownHost(filepath.Dir(knownHostsPath), host, port)
-			if err != nil {
-				return fmt.Errorf("checking known_hosts: %w", err)
-			}
-			if kh == nil {
-				return fmt.Errorf("host key not found in known_hosts: %s", hostname)
-			}
-			wantFP := kh.Fingerprint
-			if capturedFingerprint != wantFP {
-				return fmt.Errorf("host key mismatch: got %s, want %s", capturedFingerprint, wantFP)
-			}
-		}
-		return nil
+		capturedPubKey = key
+		return callback(hostname, remote, key)
 	}
 
 	cfg := &ssh.ClientConfig{
@@ -71,23 +65,27 @@ func TestSSHConnection(ctx context.Context, host string, port int, user, privKey
 	conn, err := ssh.Dial("tcp", addr, cfg)
 	if err != nil {
 		if strings.Contains(err.Error(), "known_hosts") || strings.Contains(err.Error(), "host key") {
-			return &ConnResult{
-				Success:     false,
-				Error:       fmt.Sprintf("host key verification failed: %v", err),
-				Fingerprint: capturedFingerprint,
-			}, nil
+			return nil, capturedFingerprint, capturedPubKey, fmt.Errorf("host key verification failed: %v", err)
 		}
+		return nil, capturedFingerprint, capturedPubKey, fmt.Errorf("connection failed: %v", err)
+	}
+	return conn, capturedFingerprint, capturedPubKey, nil
+}
+
+func TestSSHConnection(ctx context.Context, host string, port int, user, privKeyPath, knownHostsPath string, strictHostKeyChecking bool) (*ConnResult, error) {
+	conn, fingerprint, _, err := dialSSH(ctx, host, port, user, privKeyPath, knownHostsPath, strictHostKeyChecking)
+	if err != nil {
 		return &ConnResult{
 			Success:     false,
-			Error:       fmt.Sprintf("connection failed: %v", err),
-			Fingerprint: capturedFingerprint,
+			Error:       err.Error(),
+			Fingerprint: fingerprint,
 		}, nil
 	}
 	defer conn.Close()
 
 	session, err := conn.NewSession()
 	if err != nil {
-		return &ConnResult{Success: false, Error: fmt.Sprintf("session: %v", err), Fingerprint: capturedFingerprint}, nil
+		return &ConnResult{Success: false, Error: fmt.Sprintf("session: %v", err), Fingerprint: fingerprint}, nil
 	}
 	defer session.Close()
 
@@ -99,13 +97,17 @@ func TestSSHConnection(ctx context.Context, host string, port int, user, privKey
 		return &ConnResult{
 			Success:     false,
 			Error:       fmt.Sprintf("exec: %v, stderr: %s", err, stderr.String()),
-			Fingerprint: capturedFingerprint,
+			Fingerprint: fingerprint,
 		}, nil
 	}
 
 	return &ConnResult{
 		Success:     true,
 		Output:      stdout.String(),
-		Fingerprint: capturedFingerprint,
+		Fingerprint: fingerprint,
 	}, nil
 }
+
+func ConnectForApproval(ctx context.Context, host string, port int, user, privKeyPath, knownHostsPath string) (*ssh.Client, string, ssh.PublicKey, error) {
+	return dialSSH(ctx, host, port, user, privKeyPath, knownHostsPath, false)
+}

internal/syncengine/engine.go

@@ -25,16 +25,24 @@ type Engine struct {
 	mu          sync.RWMutex
 	stopped     bool
 	lastProbeAt atomic.Int64
+	jobsWG      sync.WaitGroup
+	stopCh      chan struct{}
+
+	jobsTotal   map[string]int64
+	jobsTotalMu sync.Mutex
 }
 
 type Event struct {
-	Type      string
-	JobID     int64
-	MachineID int64
-	Key       string
-	Value     string
-	Line      string
-	Stream    string
+	Type       string          `json:"type"`
+	JobID      int64           `json:"job_id"`
+	MachineID  int64           `json:"machine_id"`
+	Key        string          `json:"key,omitempty"`
+	Value      string          `json:"value,omitempty"`
+	Line       string          `json:"line,omitempty"`
+	Stream     string          `json:"stream,omitempty"`
+	Progress   *ProgressFields `json:"progress,omitempty"`
+	TotalBytes int64           `json:"total_bytes,omitempty"`
+	SentBytes  int64           `json:"sent_bytes,omitempty"`
 }
 
 func New(database interface{ SQLDB() *sql.DB }, cfg *config.Config) *Engine {
@@ -43,12 +51,56 @@ func New(database interface{ SQLDB() *sql.DB }, cfg *config.Config) *Engine {
 		cfg:      cfg,
 		queue:    NewQueue(),
 		eventBus: NewEventBus(200),
+		stopCh:   make(chan struct{}),
+		jobsTotal: map[string]int64{
+			"success":   0,
+			"failed":    0,
+			"cancelled": 0,
+		},
 	}
 	return e
 }
 
-func (e *Engine) Start() {}
-func (e *Engine) Stop()  {}
+func (e *Engine) Start() {
+	e.recoverOrphanedJobs()
+	slog.Info("engine started")
+}
+
+func (e *Engine) Stop() {
+	e.mu.Lock()
+	if e.stopped {
+		e.mu.Unlock()
+		return
+	}
+	e.stopped = true
+	e.mu.Unlock()
+
+	close(e.stopCh)
+
+	runningIDs := e.queue.RunningJobs()
+	for _, id := range runningIDs {
+		e.queue.Cancel(id, false)
+	}
+
+	e.jobsWG.Wait()
+	slog.Info("engine stopped")
+}
+
+func (e *Engine) recoverOrphanedJobs() {
+	jobRepo := models.NewJobRepository(e.db)
+	jobs, err := jobRepo.GetByStatusAny([]string{"queued", "waking_up", "running"})
+	if err != nil {
+		slog.Warn("failed to recover orphaned jobs", "error", err)
+		return
+	}
+	for _, j := range jobs {
+		slog.Warn("recovered orphaned job, marking as failed",
+			"job_id", j.ID, "pair_id", j.SyncPairID, "status", j.Status)
+		jobRepo.UpdateStatus(j.ID, "failed")
+		jobRepo.SetError(j.ID, "crash_recovery",
+			fmt.Sprintf("job was %s when server shut down unexpectedly", j.Status))
+	}
+}
 
 func (e *Engine) SubscribeJob(jobID int64) (chan Event, func()) {
 	return e.eventBus.Subscribe(jobID)
@@ -81,9 +133,12 @@ func (e *Engine) wakeMachine(ctx context.Context, m *models.Machine) {
 }
 
 func (e *Engine) Run(ctx context.Context, jobID int64, pairID int64) error {
-	if e.queue.IsRunning(pairID) {
-		existingJobID, _ := e.queue.GetJobID(pairID)
-		return fmt.Errorf("%w: job %d is already running", ErrAlreadyRunning, existingJobID)
+	if e.queue.IsRunning(jobID) {
+		return fmt.Errorf("%w: job %d is already running", ErrAlreadyRunning, jobID)
+	}
+
+	if existingJobID, exists := e.queue.GetByPair(pairID); exists {
+		return fmt.Errorf("%w: job %d is already running for this sync pair", ErrAlreadyRunning, existingJobID)
 	}
 
 	jobCtx, cancel := context.WithCancel(ctx)
@@ -96,7 +151,10 @@ func (e *Engine) Run(ctx context.Context, jobID int64, pairID int64) error {
 	if enqueueErr != nil {
 		return enqueueErr
 	}
-	defer e.queue.Dequeue(pairID)
+	defer e.queue.Dequeue(jobID)
+
+	e.jobsWG.Add(1)
+	defer e.jobsWG.Done()
 
 	pairRepo := models.NewSyncPairRepository(e.db)
 	pair, err := pairRepo.GetByID(pairID)
@@ -243,7 +301,17 @@ func (e *Engine) Run(ctx context.Context, jobID int64, pairID int64) error {
 		}
 	}
 
+	var lastFileName string
 	onLine := func(stream, line string) {
+		if stream == "stdout" && isProgressOnlyLine(line) {
+			if p := parseProgressFields(line); p != nil {
+				e.emit(Event{Type: "progress", JobID: jobID, Line: line, Stream: stream, Progress: p, Value: lastFileName})
+			}
+			return
+		}
+		if stream == "stdout" && isFileNameLine(line) {
+			lastFileName = line
+		}
 		f, _ := os.OpenFile(logPath, os.O_APPEND|os.O_WRONLY, 0644)
 		if f != nil {
 			fmt.Fprintln(f, line)
@@ -264,25 +332,33 @@ func (e *Engine) Run(ctx context.Context, jobID int64, pairID int64) error {
 		destPrivKeyPath, err := e.resolveSSHKey(dstMachine)
 		if err != nil {
 			slog.Warn("failed to resolve destination SSH key, using server key", "error", err)
-			destPrivKeyPath = filepath.Join(e.cfg.SSHDir(), "id_ed25519")
+			destPrivKeyPath = ""
 		}
-		destPrivKeyBytes, err := os.ReadFile(destPrivKeyPath)
-		if err != nil {
-			slog.Warn("failed to read destination SSH key, using empty", "error", err)
-			destPrivKeyBytes = []byte{}
-		}
-		result, err = runner.RunRemote(jobCtx, cfg, RemoteMachine{
+		result, err = runner.RunRemote(jobCtx, cfg,
+			&MachineKeys{
 				Host:    srcMachine.Host,
 				Port:    srcMachine.Port,
 				SSHUser: srcMachine.SSHUser,
 				PrivKey: privKey,
-			DestPrivKey: string(destPrivKeyBytes),
-		}, onLine)
+			},
+			&MachineKeys{
+				Host:    dstMachine.Host,
+				Port:    dstMachine.Port,
+				SSHUser: dstMachine.SSHUser,
+				PrivKey: destPrivKeyPath,
+			},
+			destPrivKeyPath,
+			onLine)
 	} else {
 		result, err = runner.Run(jobCtx, cfg, onLine)
 	}
 	flush()
 
+	stats := result.Stats
+	if stats != nil && stats.TotalSize > 0 {
+		e.emit(Event{Type: "progress_total", JobID: jobID, TotalBytes: stats.TotalSize, SentBytes: stats.SentBytes})
+	}
+
 	if err != nil {
 		if jobCtx.Err() != nil {
 			code := "cancelled_shutdown"
@@ -294,6 +370,7 @@ func (e *Engine) Run(ctx context.Context, jobID int64, pairID int64) error {
 			e.setJobError(jobID, code, msg)
 			e.setJobStatus(jobID, "cancelled")
 			e.emit(Event{Type: "status", JobID: jobID, Key: "status", Value: "cancelled", Line: msg})
+			e.persistAndClose(jobID)
 			return jobCtx.Err()
 		}
 		e.setJobStatus(jobID, "failed")
@@ -312,11 +389,15 @@ func (e *Engine) Run(ctx context.Context, jobID int64, pairID int64) error {
 		e.setJobStatus(jobID, "failed")
 		e.setJobError(jobID, errCode, errMsg)
 		e.emit(Event{Type: "status", JobID: jobID, Key: "status", Value: "failed", Line: errMsg})
+		e.persistAndClose(jobID)
 		return fmt.Errorf("rsync exited with code %d: %s", result.ExitCode, result.Stderr)
 	}
 
 	e.setJobStatus(jobID, "success")
 	e.emit(Event{Type: "status", JobID: jobID, Key: "status", Value: "success"})
+	if stats != nil {
+		e.persistJobTotals(jobID, stats)
+	}
 	slog.Info("job completed", "job_id", jobID, "pair", pair.Name)
 	e.persistAndClose(jobID)
 	return nil
@@ -324,6 +405,23 @@ func (e *Engine) Run(ctx context.Context, jobID int64, pairID int64) error {
 
 func (e *Engine) persistAndClose(jobID int64) {
 	e.eventBus.CloseJobChannels(jobID)
+	logRepo := models.NewJobLogRepository(e.db)
+	count, err := logRepo.CountByJobID(jobID)
+	if err == nil && count > 2000 {
+		if truncateErr := logRepo.TruncateKeepingHeaderTail(jobID, 50, 100); truncateErr != nil {
+			slog.Warn("failed to truncate job logs", "job_id", jobID, "error", truncateErr)
+		}
+	}
+}
+
+func (e *Engine) persistJobTotals(jobID int64, stats *RsyncStats) {
+	if stats == nil {
+		return
+	}
+	jobRepo := models.NewJobRepository(e.db)
+	if err := jobRepo.SetTotals(jobID, stats.TotalSize, stats.SentBytes); err != nil {
+		slog.Warn("failed to persist job totals", "job_id", jobID, "error", err)
+	}
 }
 
 func (e *Engine) resolveSSHKey(machine *models.Machine) (string, error) {
@@ -338,17 +436,18 @@ func (e *Engine) resolveSSHKey(machine *models.Machine) (string, error) {
 	return sshKey.PrivateKeyPath, nil
 }
 
-func (e *Engine) Cancel(jobID int64, syncPairID int64, byUser bool) bool {
-	if e.queue.IsRunning(syncPairID) {
-		e.queue.Cancel(syncPairID, byUser)
-		return true
-	}
-	return false
+func (e *Engine) Cancel(jobID int64, byUser bool) bool {
+	return e.queue.Cancel(jobID, byUser)
 }
 
 func (e *Engine) setJobStatus(jobID int64, status string) {
 	jobRepo := models.NewJobRepository(e.db)
 	jobRepo.UpdateStatus(jobID, status)
+	if status == "success" || status == "failed" || status == "cancelled" {
+		e.jobsTotalMu.Lock()
+		e.jobsTotal[status]++
+		e.jobsTotalMu.Unlock()
+	}
 }
 
 func (e *Engine) setJobLogFile(jobID int64, path string) {
@@ -452,3 +551,36 @@ func (e *Engine) ProbeAllMachines() {
 	}
 	wg.Wait()
 }
+
+func (e *Engine) GetJobsTotal() map[string]int64 {
+	e.jobsTotalMu.Lock()
+	defer e.jobsTotalMu.Unlock()
+	return e.jobsTotal
+}
+
+func (e *Engine) GetJobsRunning() int64 {
+	return int64(len(e.queue.RunningJobs()))
+}
+
+func (e *Engine) GetQueueDepth() int64 {
+	return int64(e.queue.Len())
+}
+
+func (e *Engine) GetMachineCounts() (online, total int64) {
+	machineRepo := models.NewMachineRepository(e.db)
+	ms, err := machineRepo.GetAll()
+	if err != nil {
+		return 0, 0
+	}
+	for _, m := range ms {
+		total++
+		if m.Status == "online" {
+			online++
+		}
+	}
+	return online, total
+}
+
+func (e *Engine) DB() *sql.DB {
+	return e.db
+}

internal/syncengine/eventbus.go

@@ -8,20 +8,17 @@ import (
 type EventBus struct {
 	subscribers map[int64]map[chan Event]struct{}
 	mu          sync.RWMutex
-	global      chan Event
 	bufferSize  int
 	globalSubs  []globalSub
 }
 
 type globalSub struct {
 	ch chan Event
-	done chan struct{}
 }
 
 func NewEventBus(bufferSize int) *EventBus {
 	return &EventBus{
 		subscribers: make(map[int64]map[chan Event]struct{}),
-		global:      make(chan Event, bufferSize),
 		bufferSize:  bufferSize,
 		globalSubs:  nil,
 	}
@@ -51,32 +48,10 @@ func (eb *EventBus) Subscribe(jobID int64) (chan Event, func()) {
 
 func (eb *EventBus) SubscribeGlobal() (chan Event, func()) {
 	ch := make(chan Event, eb.bufferSize)
-	done := make(chan struct{})
 	eb.mu.Lock()
-	eb.globalSubs = append(eb.globalSubs, globalSub{ch: ch, done: done})
+	eb.globalSubs = append(eb.globalSubs, globalSub{ch: ch})
 	eb.mu.Unlock()
-	go func() {
-		defer func() {
-			if r := recover(); r != nil {
-				slog.Error("SubscribeGlobal goroutine panicked", "reason", r)
-			}
-			close(ch)
-		}()
-		for {
-			select {
-			case evt := <-eb.global:
-				select {
-				case ch <- evt:
-				default:
-					slog.Warn("global event subscriber buffer full, dropping event", "type", evt.Type)
-				}
-			case <-done:
-				return
-			}
-		}
-	}()
 	return ch, func() {
-		close(done)
 		eb.mu.Lock()
 		for i, s := range eb.globalSubs {
 			if s.ch == ch {
@@ -85,6 +60,7 @@ func (eb *EventBus) SubscribeGlobal() (chan Event, func()) {
 			}
 		}
 		eb.mu.Unlock()
+		close(ch)
 	}
 }
 
@@ -102,10 +78,12 @@ func (eb *EventBus) Publish(evt Event) {
 		}
 	}
 
+	for _, sub := range eb.globalSubs {
 		select {
-	case eb.global <- evt:
+		case sub.ch <- evt:
 		default:
-		slog.Warn("global event bus full, dropping event", "type", evt.Type)
+			slog.Warn("global event subscriber buffer full, dropping event", "type", evt.Type)
+		}
 	}
 }
 

internal/syncengine/parser.go

@@ -24,6 +24,15 @@ type ProgressLine struct {
 	XferedBytes int64
 }
 
+type ProgressFields struct {
+	FileBytes  int64 `json:"file_bytes"`
+	Pct        int   `json:"pct"`
+	SpeedBps   int64 `json:"speed_bps"`
+	EtaSeconds int   `json:"eta_seconds"`
+	XfrDone    int   `json:"xfr_done"`
+	XfrTotal   int   `json:"xfr_total"`
+}
+
 var (
 	progressRegex = regexp.MustCompile(`\s*([\d,]+)\s+([\d,]+)\s+([\d%]+)\s*`)
 	sentRegex     = regexp.MustCompile(`sent\s+([\d,]+)\s+bytes`)
@@ -32,6 +41,24 @@ var (
 	filesRegex    = regexp.MustCompile(`Number of files: ([\d,]+)`)
 )
 
+var perFileProgressRegex = regexp.MustCompile(
+	`^\s*(\d{1,3}(?:,\d{3})+)\s+(\d+)%\s+(\d+\.\d+)([kMG])B/s\s+(\d+:\d{2}:\d{2})(.*)`,
+)
+
+var xfrRegex = regexp.MustCompile(`xfr#(\d+).*to-chk=(\d+)/(\d+)`)
+
+func parseXfrSuffix(suffix string) (done, total int) {
+	m := xfrRegex.FindStringSubmatch(suffix)
+	if m == nil {
+		return 0, 0
+	}
+	done, _ = strconv.Atoi(m[1])
+	t, _ := strconv.Atoi(m[2])
+	_ = t
+	total, _ = strconv.Atoi(m[3])
+	return done, total
+}
+
 func ParseProgressLine(line string) *ProgressLine {
 	if strings.Contains(line, "files to consider") || strings.Contains(line, "files...") {
 		return &ProgressLine{Phase: "scanning"}
@@ -74,3 +101,71 @@ func ParseFinalStats(output string) *RsyncStats {
 	}
 	return stats
 }
+
+func isProgressOnlyLine(line string) bool {
+	return perFileProgressRegex.MatchString(line)
+}
+
+func parseProgressFields(line string) *ProgressFields {
+	m := perFileProgressRegex.FindStringSubmatch(line)
+	if m == nil {
+		return nil
+	}
+	bytes, _ := strconv.ParseInt(strings.ReplaceAll(m[1], ",", ""), 10, 64)
+	pct, _ := strconv.Atoi(m[2])
+	speed, _ := strconv.ParseFloat(m[3], 64)
+	unit := m[4]
+	eta := m[5]
+	suffix := m[6]
+
+	speedBps := int64(speed * 1e6)
+	switch unit {
+	case "k", "K":
+		speedBps = int64(speed * 1e3)
+	case "m", "M":
+		speedBps = int64(speed * 1e6)
+	case "g", "G":
+		speedBps = int64(speed * 1e9)
+	}
+
+	etaSecs := 0
+	parts := strings.Split(eta, ":")
+	if len(parts) == 3 {
+		h, _ := strconv.Atoi(parts[0])
+		m, _ := strconv.Atoi(parts[1])
+		s, _ := strconv.Atoi(parts[2])
+		etaSecs = h*3600 + m*60 + s
+	}
+
+	pf := &ProgressFields{
+		FileBytes:  bytes,
+		Pct:        pct,
+		SpeedBps:   speedBps,
+		EtaSeconds: etaSecs,
+	}
+
+	if suffix != "" {
+		done, total := parseXfrSuffix(suffix)
+		pf.XfrDone = done
+		pf.XfrTotal = total
+	}
+
+	return pf
+}
+
+func isFileNameLine(line string) bool {
+	if line == "" || strings.TrimSpace(line) == "" {
+		return false
+	}
+	if strings.Contains(line, "sending incremental file list") ||
+		strings.Contains(line, "building file list") ||
+		strings.Contains(line, "cannot open") ||
+		strings.Contains(line, "skipping non-regular") ||
+		strings.HasPrefix(line, "sent ") ||
+		strings.HasPrefix(line, "total ") ||
+		strings.HasPrefix(line, "Number of files:") ||
+		strings.Contains(line, "bytes received") {
+		return false
+	}
+	return !isProgressOnlyLine(line)
+}

internal/syncengine/parser_test.go

@@ -0,0 +1,124 @@
+package syncengine
+
+import "testing"
+
+func TestIsProgressOnlyLine(t *testing.T) {
+	cases := []struct {
+		name  string
+		line  string
+		expect bool
+	}{
+		{"per-file progress 0%", "    32,768 0% 0.00kB/s 0:00:00", true},
+		{"per-file progress 7%", " 2,260,893,696 7% 51.14MB/s 0:08:45", true},
+		{"per-file progress with xfr suffix", "   67,141,632 0% 32.02MB/s 0:15:06 (xfr#1, to-chk=4/10)", true},
+		{"filename line", "Dragon Ball Sleeping Princess in Devil's Castle (1987)/", false},
+		{"sending incremental file list header", "sending incremental file list", false},
+		{"sent bytes stats", "sent 123,456 bytes  received 789 bytes  12.34kB/s", false},
+		{"total size stats", "total size is 999,999,999  speedup is 1.23", false},
+		{"Number of files stats", "Number of files: 10", false},
+		{"building file list", "building file list ...", false},
+		{"empty line", "", false},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got := isProgressOnlyLine(tc.line)
+			if got != tc.expect {
+				t.Errorf("isProgressOnlyLine(%q) = %v, want %v", tc.line, got, tc.expect)
+			}
+		})
+	}
+}
+
+func TestParseProgressFields(t *testing.T) {
+	cases := []struct {
+		name           string
+		line           string
+		wantPct        int
+		wantSpeedBps   int64
+		wantEtaSeconds int
+		wantXfrDone    int
+		wantXfrTotal   int
+	}{
+		{
+			name:           "progress 0% with kB/s",
+			line:           "    32,768 0% 0.00kB/s 0:00:00",
+			wantPct:        0,
+			wantSpeedBps:   0,
+			wantEtaSeconds: 0,
+		},
+		{
+			name:           "progress 7% with MB/s",
+			line:           " 2,260,893,696 7% 51.14MB/s 0:08:45",
+			wantPct:        7,
+			wantSpeedBps:   51_140_000,
+			wantEtaSeconds: 8*60 + 45,
+		},
+		{
+			name:           "progress with xfr suffix",
+			line:           "   67,141,632 0% 32.02MB/s 0:15:06 (xfr#1, to-chk=4/10)",
+			wantPct:        0,
+			wantSpeedBps:   32_020_000,
+			wantEtaSeconds: 15*60 + 6,
+			wantXfrDone:    1,
+			wantXfrTotal:   10,
+		},
+		{
+			name:           "progress with GB/s",
+			line:           " 1,234,567,890 50% 1.23GB/s 0:01:30",
+			wantPct:        50,
+			wantSpeedBps:   1_230_000_000,
+			wantEtaSeconds: 1*60 + 30,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			p := parseProgressFields(tc.line)
+			if p == nil {
+				t.Fatalf("parseProgressFields(%q) returned nil, want non-nil", tc.line)
+			}
+			if p.Pct != tc.wantPct {
+				t.Errorf("pct = %d, want %d", p.Pct, tc.wantPct)
+			}
+			if p.SpeedBps != tc.wantSpeedBps {
+				t.Errorf("speedBps = %d, want %d", p.SpeedBps, tc.wantSpeedBps)
+			}
+			if p.EtaSeconds != tc.wantEtaSeconds {
+				t.Errorf("etaSeconds = %d, want %d", p.EtaSeconds, tc.wantEtaSeconds)
+			}
+			if tc.wantXfrTotal > 0 && p.XfrDone != tc.wantXfrDone {
+				t.Errorf("xfrDone = %d, want %d", p.XfrDone, tc.wantXfrDone)
+			}
+			if tc.wantXfrTotal > 0 && p.XfrTotal != tc.wantXfrTotal {
+				t.Errorf("xfrTotal = %d, want %d", p.XfrTotal, tc.wantXfrTotal)
+			}
+		})
+	}
+}
+
+func TestIsFileNameLine(t *testing.T) {
+	cases := []struct {
+		name   string
+		line   string
+		expect bool
+	}{
+		{"directory path", "Dragon Ball Sleeping Princess in Devil's Castle (1987)/", true},
+		{"file path", "Dragon Ball Sleeping Princess in Devil's Castle (1987)/Dragon Ball...WEBDL-2160p.mkv", true},
+		{"sending incremental file list header", "sending incremental file list", false},
+		{"sent stats", "sent 12,345 bytes  received 1,234 bytes", false},
+		{"total size stats", "total size is 999,999,999", false},
+		{"Number of files", "Number of files: 10", false},
+		{"progress line", " 2,260,893,696 7% 51.14MB/s 0:08:45", false},
+		{"empty", "", false},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got := isFileNameLine(tc.line)
+			if got != tc.expect {
+				t.Errorf("isFileNameLine(%q) = %v, want %v", tc.line, got, tc.expect)
+			}
+		})
+	}
+}

internal/syncengine/queue.go

@@ -14,59 +14,84 @@ type Queue struct {
 
 type RunInfo struct {
 	JobID       int64
+	SyncPairID  int64
 	Cancel      func()
-	ByUser bool
+	CancelledBy bool
 }
 
 func NewQueue() *Queue {
 	return &Queue{runs: make(map[int64]*RunInfo)}
 }
 
-func (q *Queue) Enqueue(syncPairID, jobID int64, cancel func()) error {
+func (q *Queue) Enqueue(syncPairID, jobID int64, cancelFn func()) error {
 	q.mu.Lock()
 	defer q.mu.Unlock()
-	if _, exists := q.runs[syncPairID]; exists {
+	if _, exists := q.runs[jobID]; exists {
 		return ErrAlreadyRunning
 	}
-	q.runs[syncPairID] = &RunInfo{JobID: jobID, Cancel: cancel}
+	for _, info := range q.runs {
+		if info.SyncPairID == syncPairID {
+			return ErrAlreadyRunning
+		}
+	}
+	q.runs[jobID] = &RunInfo{JobID: jobID, SyncPairID: syncPairID, Cancel: cancelFn}
 	return nil
 }
 
-func (q *Queue) Dequeue(syncPairID int64) {
+func (q *Queue) Dequeue(jobID int64) {
 	q.mu.Lock()
 	defer q.mu.Unlock()
-	delete(q.runs, syncPairID)
+	delete(q.runs, jobID)
 }
 
-func (q *Queue) IsRunning(syncPairID int64) bool {
+func (q *Queue) IsRunning(jobID int64) bool {
 	q.mu.Lock()
 	defer q.mu.Unlock()
-	_, exists := q.runs[syncPairID]
+	_, exists := q.runs[jobID]
 	return exists
 }
 
-func (q *Queue) GetJobID(syncPairID int64) (int64, bool) {
+func (q *Queue) GetByPair(syncPairID int64) (jobID int64, exists bool) {
 	q.mu.Lock()
 	defer q.mu.Unlock()
-	info, exists := q.runs[syncPairID]
-	if !exists {
-		return 0, false
-	}
+	for _, info := range q.runs {
+		if info.SyncPairID == syncPairID {
 			return info.JobID, true
 		}
+	}
+	return 0, false
+}
 
-func (q *Queue) Cancel(syncPairID int64, byUser bool) {
+func (q *Queue) Cancel(jobID int64, byUser bool) bool {
 	q.mu.Lock()
 	defer q.mu.Unlock()
-	if info, exists := q.runs[syncPairID]; exists && info.Cancel != nil {
-		info.ByUser = byUser
+	if info, exists := q.runs[jobID]; exists && info.Cancel != nil {
+		info.CancelledBy = byUser
 		info.Cancel()
+		return true
 	}
+	return false
 }
 
-func (q *Queue) IsCancelledByUser(syncPairID int64) bool {
+func (q *Queue) IsCancelledByUser(jobID int64) bool {
 	q.mu.Lock()
 	defer q.mu.Unlock()
-	info, exists := q.runs[syncPairID]
-	return exists && info.ByUser
+	info, exists := q.runs[jobID]
+	return exists && info.CancelledBy
+}
+
+func (q *Queue) RunningJobs() []int64 {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+	ids := make([]int64, 0, len(q.runs))
+	for id := range q.runs {
+		ids = append(ids, id)
+	}
+	return ids
+}
+
+func (q *Queue) Len() int {
+	q.mu.Lock()
+	defer q.mu.Unlock()
+	return len(q.runs)
 }

internal/syncengine/queue_test.go

@@ -7,7 +7,7 @@ import (
 func TestQueue(t *testing.T) {
 	q := NewQueue()
 
-	if q.IsRunning(1) {
+	if q.IsRunning(100) {
 		t.Error("queue should be empty")
 	}
 
@@ -16,35 +16,37 @@ func TestQueue(t *testing.T) {
 
 	err := q.Enqueue(1, 100, cancel)
 	if err != nil {
-		t.Errorf("Enqueue(1) unexpected error: %v", err)
+		t.Errorf("Enqueue(1, 100) unexpected error: %v", err)
 	}
 
-	if !q.IsRunning(1) {
-		t.Error("queue should contain syncPair 1")
+	if !q.IsRunning(100) {
+		t.Error("queue should contain job 100")
 	}
 
-	jobID, ok := q.GetJobID(1)
+	jobID, ok := q.GetByPair(1)
 	if !ok || jobID != 100 {
-		t.Errorf("GetJobID(1) = %d, %v, want 100, true", jobID, ok)
+		t.Errorf("GetByPair(1) = %d, %v, want 100, true", jobID, ok)
 	}
 
 	err = q.Enqueue(1, 200, nil)
 	if err != ErrAlreadyRunning {
-		t.Errorf("Enqueue(1) again = %v, want ErrAlreadyRunning", err)
+		t.Errorf("Enqueue(1, 200) = %v, want ErrAlreadyRunning", err)
 	}
 
-	q.Cancel(1, true)
+	ok = q.Cancel(100, true)
+	if !ok {
+		t.Error("Cancel(100) should return true")
+	}
 	if !cancelCalled {
 		t.Error("Cancel should have called the cancel func")
 	}
-	if !q.IsCancelledByUser(1) {
-		t.Error("IsCancelledByUser should return true after Cancel(1, true)")
+	if !q.IsCancelledByUser(100) {
+		t.Error("IsCancelledByUser should return true after Cancel(100, true)")
 	}
 
-	q.Dequeue(1)
+	q.Dequeue(100)
 
-	q.Dequeue(1)
-	if q.IsRunning(1) {
+	if q.IsRunning(100) {
 		t.Error("queue should be empty after Dequeue")
 	}
 }

internal/syncengine/rsync_runner.go

@@ -2,13 +2,99 @@ package syncengine
 
 import (
 	"context"
-	"encoding/base64"
 	"fmt"
 	"io"
+	"log/slog"
 	"os/exec"
+	"path/filepath"
+	"strconv"
 	"strings"
 )
 
+var allowedRsyncFlags = map[string]bool{
+	"-v":              true,
+	"-vv":             true,
+	"-q":              true,
+	"-h":              true,
+	"-P":              true,
+	"-n":              true,
+	"-z":              true,
+	"-c":              true,
+	"-u":              true,
+	"-W":              true,
+	"-i":              true,
+	"-a":              true,
+	"-r":              true,
+	"-l":              true,
+	"-t":              true,
+	"-p":              true,
+	"-g":              true,
+	"-o":              true,
+	"-D":              true,
+	"--verbose":       true,
+	"--quiet":         true,
+	"--help":          true,
+	"--partial":       true,
+	"--partial-dir":   true,
+	"--delay-updates": true,
+	"--delete":        true,
+	"--delete-before": true,
+	"--delete-after":  true,
+	"--delete-excluded": true,
+	"--exclude":       true,
+	"--exclude-from":  true,
+	"--dry-run":       true,
+	"--compress":      true,
+	"--skip-compress": true,
+	"--whole-file":    true,
+	"--checksum":     true,
+	"--update":        true,
+	"--existing":      true,
+	"--ignore-existing": true,
+	"--remove-source-files": true,
+	"--chmod":         true,
+	"--owner":         true,
+	"--group":         true,
+	"--perms":         true,
+	"--executability":  true,
+	"--acls":          true,
+	"--xattrs":        true,
+	"--numeric-ids":   true,
+	"--fake-super":    true,
+	"--bwlimit":       true,
+	"--max-size":      true,
+	"--min-size":      true,
+	"--append":        true,
+	"--append-verify": true,
+	"--itemize-changes": true,
+}
+
+var blockedRsyncFlags = map[string]bool{
+	"--rsync-path":   true,
+	"-e":            true,
+	"--files-from":  true,
+	"--read-batch":  true,
+	"--write-batch": true,
+	"--log-file":    true,
+}
+
+func isSafeRsyncFlag(flag string) bool {
+	if allowedRsyncFlags[flag] {
+		return true
+	}
+	safePrefixes := []string{
+		"-a", "-v", "-z", "-P", "-n", "-c", "-u", "-W", "-i",
+		"--exclude=", "--chmod=", "--bwlimit=", "--max-size=", "--min-size=",
+		"--partial-dir=", "--skip-compress=",
+	}
+	for _, p := range safePrefixes {
+		if strings.HasPrefix(flag, p) {
+			return true
+		}
+	}
+	return false
+}
+
 type RsyncResult struct {
 	ExitCode   int
 	Stdout     string
@@ -40,15 +126,124 @@ func NewRsyncRunner(sshDir, privKey string) *RsyncRunner {
 }
 
 func (r *RsyncRunner) Run(ctx context.Context, pair *SyncPairConfig, onLine func(stream string, line string)) (*RsyncResult, error) {
-	args := r.buildArgs(pair)
+	cmd := r.buildRsyncCmd(ctx, pair)
+	return r.runCmd(ctx, cmd, onLine)
+}
 
+func (r *RsyncRunner) buildRsyncCmd(ctx context.Context, pair *SyncPairConfig) *exec.Cmd {
+	args := r.buildArgs(pair)
 	cmd := exec.CommandContext(ctx, "rsync", args...)
 	if r.privKey != "" {
 		sshCmd := fmt.Sprintf("ssh -i %s -o StrictHostKeyChecking=accept-new -o UserKnownHostsFile=%s",
 			r.privKey, strings.TrimRight(r.sshDir, "/")+"/known_hosts")
-		cmd.Args = append([]string{"rsync", "-e", sshCmd}, args[1:]...)
+		cmd.Args = append([]string{"rsync", "-e", sshCmd}, args...)
+	}
+	return cmd
 }
 
+func (r *RsyncRunner) buildArgs(pair *SyncPairConfig) []string {
+	var args []string
+
+	flags := strings.Fields(pair.RsyncFlags)
+	for _, flag := range flags {
+		if strings.HasPrefix(flag, "-") {
+			if blockedRsyncFlags[flag] {
+				slog.Warn("blocked dangerous rsync flag", "flag", flag)
+				continue
+			}
+			if !isSafeRsyncFlag(flag) {
+				slog.Warn("disallowed rsync flag", "flag", flag)
+				continue
+			}
+		}
+		args = append(args, flag)
+	}
+
+	for _, pattern := range pair.ExcludePatterns {
+		args = append(args, "--exclude="+pattern)
+	}
+
+	if pair.Direction == "mirror" {
+		args = append(args, "--delete")
+	}
+
+	args = append(args, "--")
+	src := ensureDirSlash(pair.Source)
+	if pair.Direction == "pull" {
+		args = append(args, pair.Dest, src)
+	} else {
+		args = append(args, src, pair.Dest)
+	}
+
+	return args
+}
+
+// ensureDirSlash guarantees the source path is treated by rsync as a
+// directory whose contents are copied, regardless of whether the user
+// supplied a trailing slash. This avoids the common foot-gun where
+// "rsync host:/path/series /dest/" creates /dest/series/<contents> nested
+// inside an extra "series" subdirectory.
+func ensureDirSlash(p string) string {
+	if strings.HasSuffix(p, "/") {
+		return p
+	}
+	return p + "/"
+}
+
+type MachineKeys struct {
+	Host    string
+	Port    int
+	SSHUser string
+	PrivKey string
+}
+
+func (r *RsyncRunner) RunRemote(ctx context.Context, pair *SyncPairConfig, src *MachineKeys, dst *MachineKeys, destKey string, onLine func(stream string, line string)) (*RsyncResult, error) {
+	if src.Port == 0 {
+		src.Port = 22
+	}
+	if src.PrivKey == "" {
+		src.PrivKey = filepath.Join(r.sshDir, "id_ed25519")
+	}
+	if destKey == "" {
+		destKey = filepath.Join(r.sshDir, "id_ed25519")
+	}
+
+	args := r.buildArgs(pair)
+
+	innerSSH := fmt.Sprintf("ssh -i %s -o StrictHostKeyChecking=accept-new -o UserKnownHostsFile=%s",
+		destKey, filepath.Join(r.sshDir, "known_hosts"))
+	rsyncFlags := args[:len(args)-2]
+	sourcePath := args[len(args)-2]
+	destPath := args[len(args)-1]
+
+	var rsyncCmd []string
+	rsyncCmd = append(rsyncCmd, "rsync")
+	rsyncCmd = append(rsyncCmd, "-e")
+	rsyncCmd = append(rsyncCmd, innerSSH)
+	rsyncCmd = append(rsyncCmd, rsyncFlags...)
+	rsyncCmd = append(rsyncCmd, sourcePath, destPath)
+
+	remoteCmd := "rsync"
+	for _, arg := range rsyncFlags {
+		remoteCmd += " " + strconv.Quote(arg)
+	}
+	remoteCmd += " -e " + strconv.Quote(innerSSH) + " " + strconv.Quote(sourcePath) + " " + strconv.Quote(destPath)
+	remoteCmd = "sh -c " + strconv.Quote(remoteCmd)
+
+	sshArgs := []string{
+		"-i", src.PrivKey,
+		"-o", "StrictHostKeyChecking=accept-new",
+		"-o", "UserKnownHostsFile=" + filepath.Join(r.sshDir, "known_hosts"),
+		"-p", fmt.Sprintf("%d", src.Port),
+		fmt.Sprintf("%s@%s", src.SSHUser, src.Host),
+	}
+	sshArgs = append(sshArgs, remoteCmd)
+
+	cmd := exec.CommandContext(ctx, "ssh", sshArgs...)
+	return r.runCmd(ctx, cmd, onLine)
+}
+
+func (r *RsyncRunner) runCmd(ctx context.Context, cmd *exec.Cmd, onLine func(stream string, line string)) (*RsyncResult, error) {
 	stdout, err := cmd.StdoutPipe()
 	if err != nil {
 		return nil, fmt.Errorf("stdout pipe: %w", err)
@@ -133,146 +328,3 @@ func (r *RsyncRunner) Run(ctx context.Context, pair *SyncPairConfig, onLine func
 
 	return result, nil
 }
-
-func (r *RsyncRunner) buildArgs(pair *SyncPairConfig) []string {
-	var args []string
-
-	flags := strings.Fields(pair.RsyncFlags)
-	args = append(args, flags...)
-
-	for _, pattern := range pair.ExcludePatterns {
-		args = append(args, "--exclude="+pattern)
-	}
-
-	if pair.Direction == "mirror" {
-		args = append(args, "--delete")
-	}
-
-	if pair.Direction == "pull" {
-		args = append(args, pair.Dest, pair.Source)
-	} else {
-		args = append(args, pair.Source, pair.Dest)
-	}
-
-	return args
-}
-
-type RemoteMachine struct {
-	Host        string
-	Port        int
-	SSHUser     string
-	PrivKey     string
-	DestPrivKey string
-}
-
-func (r *RsyncRunner) RunRemote(ctx context.Context, pair *SyncPairConfig, remote RemoteMachine, onLine func(stream string, line string)) (*RsyncResult, error) {
-	args := r.buildArgs(pair)
-
-	var remoteCmd string
-	if remote.DestPrivKey != "" {
-		encodedKey := base64.StdEncoding.EncodeToString([]byte(remote.DestPrivKey))
-		innerSSH := fmt.Sprintf(`ssh -i /tmp/syncserver-dest-key -o StrictHostKeyChecking=accept-new -o UserKnownHostsFile=/dev/null`)
-		rsyncPart := fmt.Sprintf("rsync %s -e %q",
-			strings.Join(args, " "), innerSSH)
-		remoteCmd = fmt.Sprintf(
-			`echo '%s' | base64 -d > /tmp/syncserver-dest-key && chmod 600 /tmp/syncserver-dest-key && %s; STATUS=$?; rm -f /tmp/syncserver-dest-key; exit $STATUS`,
-			encodedKey, rsyncPart)
-	} else {
-		remoteCmd = "rsync " + strings.Join(args, " ")
-	}
-
-	sshArgs := []string{
-		"-i", remote.PrivKey,
-		"-o", "StrictHostKeyChecking=accept-new",
-		"-o", "UserKnownHostsFile=" + strings.TrimRight(r.sshDir, "/") + "/known_hosts",
-		"-p", fmt.Sprintf("%d", remote.Port),
-		fmt.Sprintf("%s@%s", remote.SSHUser, remote.Host),
-	}
-	sshArgs = append(sshArgs, remoteCmd)
-
-	cmd := exec.CommandContext(ctx, "ssh", sshArgs...)
-
-	stdout, err := cmd.StdoutPipe()
-	if err != nil {
-		return nil, fmt.Errorf("stdout pipe: %w", err)
-	}
-	stderr, err := cmd.StderrPipe()
-	if err != nil {
-		return nil, fmt.Errorf("stderr pipe: %w", err)
-	}
-
-	if err := cmd.Start(); err != nil {
-		return nil, fmt.Errorf("starting ssh: %w", err)
-	}
-
-	var outLines, errLines []string
-	done := make(chan struct{})
-	go func() {
-		br := io.Reader(stdout)
-		buf := make([]byte, 4096)
-		for {
-			n, err := br.Read(buf)
-			if n > 0 {
-				line := strings.TrimRight(string(buf[:n]), "\r\n")
-				if line != "" {
-					outLines = append(outLines, line)
-					if onLine != nil {
-						onLine("stdout", line)
-					}
-				}
-			}
-			if err != nil {
-				break
-			}
-		}
-		select {
-		case <-done:
-		default:
-			close(done)
-		}
-	}()
-
-	go func() {
-		br := io.Reader(stderr)
-		buf := make([]byte, 4096)
-		for {
-			n, err := br.Read(buf)
-			if n > 0 {
-				line := strings.TrimRight(string(buf[:n]), "\r\n")
-				if line != "" {
-					errLines = append(errLines, line)
-					if onLine != nil {
-						onLine("stderr", line)
-					}
-				}
-			}
-			if err != nil {
-				break
-			}
-		}
-		select {
-		case <-done:
-		default:
-			close(done)
-		}
-	}()
-
-	err = cmd.Wait()
-	<-done
-
-	result := &RsyncResult{
-		ExitCode: 0,
-		Stdout:   strings.Join(outLines, "\n"),
-		Stderr:   strings.Join(errLines, "\n"),
-		Stats:    ParseFinalStats(strings.Join(outLines, "\n")),
-	}
-	if err != nil {
-		if exitErr, ok := err.(*exec.ExitError); ok {
-			result.ExitCode = exitErr.ExitCode()
-		} else {
-			result.ExitCode = -1
-		}
-	}
-
-	return result, nil
-}

internal/syncengine/rsync_runner_test.go

@@ -0,0 +1,312 @@
+package syncengine
+
+import (
+	"context"
+	"strings"
+	"testing"
+)
+
+type remoteCmdTest struct {
+	srcHost   string
+	srcUser   string
+	srcPath   string
+	dstHost   string
+	dstUser   string
+	dstPath   string
+	direction string
+}
+
+func (tc remoteCmdTest) build() (srcArg, dstArg string) {
+	runner := NewRsyncRunner("/tmp/ssh", "")
+	args := runner.buildArgs(&SyncPairConfig{
+		Source:    tc.srcPath,
+		Dest:      tc.dstPath,
+		Direction: tc.direction,
+	})
+	sourcePath := args[len(args)-2]
+	destPath := args[len(args)-1]
+	return sourcePath, destPath
+}
+
+func TestBuildArgs_Push(t *testing.T) {
+	runner := NewRsyncRunner("/tmp/ssh", "")
+	pair := &SyncPairConfig{
+		Source:          "/local/src",
+		Dest:            "admin@10.5.0.144:/remote/dst",
+		Direction:       "push",
+		RsyncFlags:      "-aP",
+		ExcludePatterns: []string{},
+	}
+	args := runner.buildArgs(pair)
+	if args[0] != "-aP" {
+		t.Errorf("first flag = %q, want %q", args[0], "-aP")
+	}
+	if args[len(args)-2] != "/local/src/" {
+		t.Errorf("source = %q, want %q (auto-appended trailing slash)", args[len(args)-2], "/local/src/")
+	}
+	if args[len(args)-1] != "admin@10.5.0.144:/remote/dst" {
+		t.Errorf("dest = %q, want %q", args[len(args)-1], "admin@10.5.0.144:/remote/dst")
+	}
+}
+
+func TestBuildArgs_Pull(t *testing.T) {
+	runner := NewRsyncRunner("/tmp/ssh", "")
+	pair := &SyncPairConfig{
+		Source:          "admin@10.5.0.144:/remote/src",
+		Dest:            "/local/dst",
+		Direction:       "pull",
+		RsyncFlags:      "-aP",
+		ExcludePatterns: []string{},
+	}
+	args := runner.buildArgs(pair)
+	if args[len(args)-2] != "/local/dst" {
+		t.Errorf("pull: second-to-last (dest) = %q, want %q", args[len(args)-2], "/local/dst")
+	}
+	if args[len(args)-1] != "admin@10.5.0.144:/remote/src/" {
+		t.Errorf("pull: last (source) = %q, want %q (auto-appended trailing slash)", args[len(args)-1], "admin@10.5.0.144:/remote/src/")
+	}
+}
+
+func TestBuildArgs_Mirror(t *testing.T) {
+	runner := NewRsyncRunner("/tmp/ssh", "")
+	pair := &SyncPairConfig{
+		Source:          "/local/src",
+		Dest:            "admin@10.5.0.144:/remote/dst",
+		Direction:       "mirror",
+		RsyncFlags:      "-aP",
+		ExcludePatterns: []string{},
+	}
+	args := runner.buildArgs(pair)
+	foundDelete := false
+	for _, a := range args {
+		if a == "--delete" {
+			foundDelete = true
+			break
+		}
+	}
+	if !foundDelete {
+		t.Errorf("mirror args = %v, want --delete present", args)
+	}
+}
+
+func TestBuildArgs_MultiTokenFlags(t *testing.T) {
+	runner := NewRsyncRunner("/tmp/ssh", "")
+	pair := &SyncPairConfig{
+		Source:          "/local/src",
+		Dest:            "admin@10.5.0.144:/remote/dst",
+		Direction:       "push",
+		RsyncFlags:      "-aP --partial",
+		ExcludePatterns: []string{},
+	}
+	args := runner.buildArgs(pair)
+	if args[0] != "-aP" {
+		t.Errorf("first flag = %q, want %q", args[0], "-aP")
+	}
+	if args[1] != "--partial" {
+		t.Errorf("second flag = %q, want %q", args[1], "--partial")
+	}
+}
+
+func TestBuildArgs_ExcludePatterns(t *testing.T) {
+	runner := NewRsyncRunner("/tmp/ssh", "")
+	pair := &SyncPairConfig{
+		Source:          "/local/src",
+		Dest:            "admin@10.5.0.144:/remote/dst",
+		Direction:       "push",
+		RsyncFlags:      "-aP",
+		ExcludePatterns: []string{"*.tmp", ".DS_Store"},
+	}
+	args := runner.buildArgs(pair)
+	var excludes []string
+	for _, a := range args {
+		if strings.HasPrefix(a, "--exclude=") {
+			excludes = append(excludes, a)
+		}
+	}
+	if len(excludes) != 2 {
+		t.Errorf("excludes = %v, want 2 exclude entries", excludes)
+	}
+	if excludes[0] != "--exclude=*.tmp" {
+		t.Errorf("exclude[0] = %q, want %q", excludes[0], "--exclude=*.tmp")
+	}
+}
+
+func TestRunRemote_PushDestNoDoublePrefix(t *testing.T) {
+	tc := remoteCmdTest{
+		srcHost:   "10.5.1.10",
+		srcUser:   "root",
+		srcPath:   "/share/homes/admin/media",
+		dstHost:   "10.5.0.144",
+		dstUser:   "admin",
+		dstPath:   "admin@10.5.0.144:/share/media/peliculas",
+		direction: "push",
+	}
+	_, dstArg := tc.build()
+
+	if countOccurrences(dstArg, "@") > 1 {
+		t.Errorf("push dest %q has double SSH spec", dstArg)
+	}
+	if dstArg != "admin@10.5.0.144:/share/media/peliculas" {
+		t.Errorf("push dest = %q, want 'admin@10.5.0.144:/share/media/peliculas'", dstArg)
+	}
+}
+
+func TestRunRemote_PushSrcAndDestStayAsIs(t *testing.T) {
+	tc := remoteCmdTest{
+		srcHost:   "10.5.1.10",
+		srcUser:   "root",
+		srcPath:   "/share/homes/admin/media",
+		dstHost:   "10.5.0.144",
+		dstUser:   "admin",
+		dstPath:   "/share/media/peliculas",
+		direction: "push",
+	}
+	srcArg, dstArg := tc.build()
+
+	if srcArg != "/share/homes/admin/media/" {
+		t.Errorf("push src = %q, want '/share/homes/admin/media/' (auto-appended trailing slash, no user@host: prefix added)", srcArg)
+	}
+	if dstArg != "/share/media/peliculas" {
+		t.Errorf("push dst = %q, want raw path '/share/media/peliculas'", dstArg)
+	}
+}
+
+func TestRunRemote_PullSrcAndDestStayAsIs(t *testing.T) {
+	tc := remoteCmdTest{
+		srcHost:   "10.5.0.144",
+		srcUser:   "admin",
+		srcPath:   "admin@10.5.0.144:/share/media/peliculas",
+		dstHost:   "10.5.1.10",
+		dstUser:   "root",
+		dstPath:   "/share/data",
+		direction: "pull",
+	}
+	srcArg, dstArg := tc.build()
+
+	if countOccurrences(srcArg, "@") > 1 {
+		t.Errorf("pull src %q has double SSH spec", srcArg)
+	}
+	if srcArg != "/share/data" {
+		t.Errorf("pull src (rsync dest) = %q, want raw '/share/data'", srcArg)
+	}
+	if !strings.HasPrefix(dstArg, "admin@10.5.0.144:/") {
+		t.Errorf("pull dst (rsync src) = %q, want 'admin@10.5.0.144:/...' prefix", dstArg)
+	}
+}
+
+func TestBuildArgs_AutoAppendsTrailingSlashToSource(t *testing.T) {
+	cases := []struct {
+		name     string
+		source   string
+		dest     string
+		direction string
+		wantSrc  string
+	}{
+		{
+			name:      "push, source without trailing slash",
+			source:    "/mnt/storage/multimedia/series",
+			dest:      "/share/media/series",
+			direction: "push",
+			wantSrc:   "/mnt/storage/multimedia/series/",
+		},
+		{
+			name:      "push, source already has trailing slash (idempotent)",
+			source:    "/mnt/storage/multimedia/series/",
+			dest:      "/share/media/series",
+			direction: "push",
+			wantSrc:   "/mnt/storage/multimedia/series/",
+		},
+		{
+			name:      "push, remote source without trailing slash",
+			source:    "admin@baby-nas:/mnt/storage/multimedia/series",
+			dest:      "/share/media/series",
+			direction: "push",
+			wantSrc:   "admin@baby-nas:/mnt/storage/multimedia/series/",
+		},
+		{
+			name:      "pull, source without trailing slash",
+			source:    "admin@baby-nas:/mnt/storage/multimedia/series",
+			dest:      "/share/media/series",
+			direction: "pull",
+			wantSrc:   "admin@baby-nas:/mnt/storage/multimedia/series/",
+		},
+		{
+			name:      "mirror, source without trailing slash",
+			source:    "/mnt/storage/multimedia/series",
+			dest:      "admin@10.5.0.144:/share/media/series",
+			direction: "mirror",
+			wantSrc:   "/mnt/storage/multimedia/series/",
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			runner := NewRsyncRunner("/tmp/ssh", "")
+			pair := &SyncPairConfig{
+				Source:    tc.source,
+				Dest:      tc.dest,
+				Direction: tc.direction,
+			}
+			args := runner.buildArgs(pair)
+
+			var gotSrc, gotDest string
+			if tc.direction == "pull" {
+				gotDest = args[len(args)-2]
+				gotSrc = args[len(args)-1]
+			} else {
+				gotSrc = args[len(args)-2]
+				gotDest = args[len(args)-1]
+			}
+
+			if gotSrc != tc.wantSrc {
+				t.Errorf("source = %q, want %q (dest must never be touched)", gotSrc, tc.wantSrc)
+			}
+			if gotDest != tc.dest {
+				t.Errorf("dest = %q, want %q (dest must never be normalized)", gotDest, tc.dest)
+			}
+		})
+	}
+}
+
+func countOccurrences(s, substr string) int {
+	return strings.Count(s, substr)
+}
+
+func TestRun_FlagsPreservedWithPrivKey(t *testing.T) {
+	runner := NewRsyncRunner("/tmp/ssh", "/tmp/ssh/id_ed25519")
+	pair := &SyncPairConfig{
+		Source:          "/local/src",
+		Dest:            "admin@10.5.0.144:/remote/dst",
+		Direction:       "push",
+		RsyncFlags:      "-aP --partial",
+		ExcludePatterns: []string{},
+	}
+
+	cmd := runner.buildRsyncCmd(context.Background(), pair)
+
+	if cmd.Args[0] != "rsync" {
+		t.Errorf("cmd.Args[0] = %q, want 'rsync'", cmd.Args[0])
+	}
+	if cmd.Args[1] != "-e" {
+		t.Errorf("cmd.Args[1] = %q, want '-e' (the -e flag for ssh)", cmd.Args[1])
+	}
+	if !strings.Contains(cmd.Args[2], "ssh -i") {
+		t.Errorf("cmd.Args[2] = %q, want ssh -i ...", cmd.Args[2])
+	}
+	hasAP := false
+	hasPartial := false
+	for i, a := range cmd.Args {
+		if a == "-aP" && i > 2 {
+			hasAP = true
+		}
+		if a == "--partial" && i > 2 {
+			hasPartial = true
+		}
+	}
+	if !hasAP {
+		t.Errorf("cmd.Args = %v, want -aP flag preserved (not dropped)", cmd.Args)
+	}
+	if !hasPartial {
+		t.Errorf("cmd.Args = %v, want --partial flag present", cmd.Args)
+	}
+}

internal/webui/dist/index.html

@@ -1,14 +0,0 @@
-<!doctype html>
-<html lang="en">
-  <head>
-    <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <base href="/">
-    <title>SyncServer</title>
-    <script type="module" crossorigin src="./assets/index-B2TqqDPF.js"></script>
-    <link rel="stylesheet" crossorigin href="./assets/index-BepSbXPY.css">
-  </head>
-  <body>
-    <div id="root"></div>
-  </body>
-</html>

scripts/deploy.sh

@@ -111,7 +111,7 @@ else
     NEW_VERSION=$(grep -oE 'var version = "[0-9]+\.[0-9]+\.[0-9]+"' cmd/server/main.go | grep -oE '[0-9]+\.[0-9]+\.[0-9]+')
     [ "$NEW_VERSION" != "$CURRENT_VERSION" ] || die "Version bump failed"
 
-    git add cmd/server/main.go Makefile
+    git add -f cmd/server/main.go Makefile
     git commit -m "Bump version to $NEW_VERSION" >/dev/null
     git push || die "git push failed"
     success "Bumped to $NEW_VERSION and pushed"

web/src/App.tsx

@@ -6,6 +6,7 @@ import {
   NavLink,
   Outlet,
   useNavigate,
+  Link,
 } from 'react-router-dom';
 import { useState, useEffect } from 'react';
 import { Toaster } from 'sonner';
@@ -20,6 +21,8 @@ import {
   LogOut,
   Menu,
   X,
+  Clock,
+  ArrowLeft,
 } from 'lucide-react';
 import { ErrorBoundary } from './components/ErrorBoundary';
 import { Spinner } from './components/ui/Spinner';
@@ -34,11 +37,13 @@ import JobHistory from './pages/JobHistory';
 import JobDetail from './pages/JobDetail';
 import SettingsPage from './pages/Settings';
 import SSHKeys from './pages/SSHKeys';
+import Schedules from './pages/Schedules';
 
 const navItems = [
   { to: '/', label: 'Dashboard', icon: LayoutDashboard },
   { to: '/machines', label: 'Machines', icon: Server },
   { to: '/sync-pairs', label: 'Sync Pairs', icon: GitCompare },
+  { to: '/schedules', label: 'Schedules', icon: Clock },
   { to: '/jobs', label: 'Jobs', icon: History },
   { to: '/ssh-keys', label: 'SSH Keys', icon: Key },
   { to: '/settings', label: 'Settings', icon: SettingsIcon },
@@ -217,6 +222,21 @@ function Layout() {
   );
 }
 
+function NotFound() {
+  return (
+    <div className="flex flex-col items-center justify-center min-h-[50vh] gap-3">
+      <p className="text-2xl font-bold text-fg">404</p>
+      <p className="text-fg-muted">Page not found</p>
+      <Button variant="secondary" asChild>
+        <Link to="/">
+          <ArrowLeft className="h-4 w-4" />
+          Back to Dashboard
+        </Link>
+      </Button>
+    </div>
+  );
+}
+
 export default function App() {
   return (
     <BrowserRouter>
@@ -233,12 +253,13 @@ export default function App() {
             <Route path="/" element={<Dashboard />} />
             <Route path="/machines" element={<Machines />} />
             <Route path="/sync-pairs" element={<SyncPairs />} />
+            <Route path="/schedules" element={<Schedules />} />
             <Route path="/jobs" element={<JobHistory />} />
             <Route path="/jobs/:id" element={<JobDetail />} />
             <Route path="/ssh-keys" element={<SSHKeys />} />
             <Route path="/settings" element={<SettingsPage />} />
           </Route>
-          <Route path="*" element={<Navigate to="/" />} />
+          <Route path="*" element={<NotFound />} />
         </Routes>
       </ErrorBoundary>
     </BrowserRouter>

web/src/api/client.ts

@@ -53,6 +53,9 @@ export interface Machine {
   fingerprint_confirmed: boolean;
   host_key_fingerprint: string | null;
   status: string;
+  last_seen_at: string | null;
+  created_at: string;
+  shutdown_command: string;
 }
 
 export interface TestConnectionResponse {
@@ -116,3 +119,42 @@ export interface SettingsInfo {
   data_dir: string;
   ssh_pub_key: string;
 }
+
+export interface DeployKeysResponse {
+  success: boolean;
+  messages: string[];
+  errors: string[];
+}
+
+export interface DeployKeysOptions {
+  known_hosts_host?: string;
+}
+
+export async function deployKeys(machineId: number, options?: DeployKeysOptions): Promise<DeployKeysResponse> {
+  return api<DeployKeysResponse>(`/api/machines/${machineId}/deploy-keys`, {
+    method: 'POST',
+    body: options ?? {},
+  });
+}
+
+export interface ShutdownResponse {
+  success: boolean;
+  output?: string;
+  error?: string;
+}
+
+export interface Schedule {
+  id: number;
+  sync_pair_id: number;
+  sync_pair_name: string;
+  cron_expr: string;
+  next_run_at: string | null;
+  enabled: boolean;
+  created_at: string;
+}
+
+export async function shutdownMachine(machineId: number): Promise<ShutdownResponse> {
+  return api<ShutdownResponse>(`/api/machines/${machineId}/shutdown`, {
+    method: 'POST',
+  });
+}

web/src/lib/status.ts

@@ -25,7 +25,7 @@ export type BadgeVariant = VariantProps<typeof badgeVariants>['variant']
 const STATUS_TO_VARIANT: Record<string, BadgeVariant> = {
   running: 'running',
   pending: 'pending',
-  waking: 'waking',
+  waking: 'pending',
   success: 'success',
   error: 'error',
   failed: 'error',
@@ -33,6 +33,8 @@ const STATUS_TO_VARIANT: Record<string, BadgeVariant> = {
   cancelled: 'neutral',
   info: 'info',
   unknown: 'neutral',
+  online: 'success',
+  offline: 'error',
 }
 
 export function statusVariant(status: string): BadgeVariant {

web/src/pages/Dashboard.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useState } from 'react';
 import { Link } from 'react-router-dom';
-import { Server, Activity, HardDrive, Clock, Plus } from 'lucide-react';
+import { Server, Activity, HardDrive, Clock, Plus, XCircle } from 'lucide-react';
 import { api, Machine, Job, SyncPair } from '../api/client';
 import { Badge } from '@/components/ui/Badge';
 import { Button } from '@/components/ui/Button';
@@ -12,6 +12,7 @@ import { Skeleton } from '@/components/ui/Skeleton';
 import { statusVariant, statusLabel } from '@/lib/status';
 import { formatRelativeTime } from '@/lib/utils';
 import { subscribeMachineStatus } from '@/lib/sse';
+import { toast } from 'sonner';
 
 export default function Dashboard() {
   const [machines, setMachines] = useState<Machine[]>([]);
@@ -48,6 +49,17 @@ export default function Dashboard() {
 
   const pairName = (id: number) => pairs.find(p => p.id === id)?.name ?? `Pair ${id}`;
 
+  async function cancelJob(jobId: number) {
+    try {
+      await api(`/api/jobs/${jobId}/cancel`, { method: 'POST' });
+      toast.success('Job cancelled');
+      const j = await api<Job[]>(`/api/jobs?limit=5`);
+      setJobs(j);
+    } catch (e: unknown) {
+      toast.error((e as Error).message);
+    }
+  }
+
   const online = machines.filter(m => m.status.startsWith('online')).length;
   const todayJobs = jobs.filter(j => {
     if (!j.started_at) return false;
@@ -156,6 +168,7 @@ export default function Dashboard() {
                   <TableHead>Sync Pair</TableHead>
                   <TableHead>Status</TableHead>
                   <TableHead>Started</TableHead>
+                  <TableHead className="w-16">Actions</TableHead>
                 </TableRow>
               </TableHeader>
               <TableBody>
@@ -178,6 +191,19 @@ export default function Dashboard() {
                     <TableCell className="text-fg-muted text-xs">
                       {j.started_at ? formatRelativeTime(j.started_at) : '-'}
                     </TableCell>
+                    <TableCell>
+                      {['queued', 'waking_up', 'running'].includes(j.status) && (
+                        <Button
+                          variant="ghost"
+                          size="icon-sm"
+                          onClick={() => cancelJob(j.id)}
+                          className="text-rose-400 hover:text-rose-300 hover:bg-rose-500/10"
+                          title="Cancel job"
+                        >
+                          <XCircle className="h-3.5 w-3.5" />
+                        </Button>
+                      )}
+                    </TableCell>
                   </TableRow>
                 ))}
               </TableBody>

web/src/pages/JobDetail.tsx

@@ -1,6 +1,6 @@
 import { useEffect, useState, useRef, useCallback } from 'react';
 import { useParams, Link } from 'react-router-dom';
-import { api } from '../api/client';
+import { api, apiRaw } from '../api/client';
 import type { Job, LogLine, SyncPair } from '../api/client';
 import { Badge } from '@/components/ui/Badge';
 import { Button } from '@/components/ui/Button';
@@ -28,18 +28,32 @@ import {
   Terminal,
   AlertCircle,
   Ban,
+  ChevronDown,
+  Activity,
 } from 'lucide-react';
 import { toast } from 'sonner';
 import { statusVariant, statusLabel, getErrorCodeInfo } from '@/lib/status';
 import { formatDuration } from '@/lib/utils';
 import { cn } from '@/lib/utils';
 
+interface SSEProgress {
+  file_bytes: number;
+  pct: number;
+  speed_bps: number;
+  eta_seconds: number;
+  xfr_done: number;
+  xfr_total: number;
+}
+
 interface SSEEvent {
   type: string;
   job_id: number;
   status?: string;
   line?: string;
   stream?: string;
+  progress?: SSEProgress;
+  totalBytes?: number;
+  sentBytes?: number;
 }
 
 export default function JobDetail() {
@@ -56,6 +70,10 @@ export default function JobDetail() {
   const [cancelModal, setCancelModal] = useState(false);
   const [cancelReason, setCancelReason] = useState('');
   const [errorModal, setErrorModal] = useState(false);
+  const [progress, setProgress] = useState<SSEProgress | null>(null);
+  const [finalTotals, setFinalTotals] = useState<{ totalBytes: number; sentBytes: number } | null>(null);
+  const [hasMoreLogs, setHasMoreLogs] = useState(false);
+  const [loadingMore, setLoadingMore] = useState(false);
 
   useEffect(() => {
     loadJob();
@@ -78,6 +96,13 @@ export default function JobDetail() {
             return updated;
           });
         }
+        if (evt.type === 'progress' && evt.progress) {
+          setProgress(evt.progress);
+        }
+        if (evt.type === 'progress_total' && evt.totalBytes !== undefined && evt.sentBytes !== undefined) {
+          setFinalTotals({ totalBytes: evt.totalBytes, sentBytes: evt.sentBytes });
+          setProgress(null);
+        }
       };
     }
     return () => esRef.current?.close();
@@ -109,8 +134,10 @@ export default function JobDetail() {
       )) ?? [];
       if (offset === 0) {
         setLogs(ls);
+        setHasMoreLogs(ls.length === 1000);
       } else {
         setLogs(prev => [...prev, ...ls]);
+        setHasMoreLogs(ls.length === 1000);
       }
     } catch {}
   }
@@ -130,12 +157,33 @@ export default function JobDetail() {
     }
   }
 
-  function downloadLog() {
+async function downloadLog() {
+    try {
+      const resp = await apiRaw(`/api/jobs/${id}/log/download`);
+      if (resp.ok && resp.body) {
+        const blob = await resp.blob();
+        const url = URL.createObjectURL(blob);
+        const a = document.createElement('a');
+        a.href = url;
+        a.download = `job-${id}.log`;
+        document.body.appendChild(a);
+        a.click();
+        document.body.removeChild(a);
+        URL.revokeObjectURL(url);
+      } else {
+        fallbackDownload();
+      }
+    } catch {
+      fallbackDownload();
+    }
+  }
+
+  function fallbackDownload() {
     const allLines = [
       ...logs.map(l => `[${l.timestamp}] [${l.stream}] ${l.content}`),
       ...liveLines.map(l => `[LIVE] [${l.stream}] ${l.text}`),
     ];
-    const blob = new Blob([allLines.join('\n')], { type: 'text/plain' });
+    const blob = new Blob(allLines as string[], { type: 'text/plain' });
     const url = URL.createObjectURL(blob);
     const a = document.createElement('a');
     a.href = url;
@@ -321,6 +369,10 @@ export default function JobDetail() {
         </div>
       )}
 
+      {(progress || finalTotals) && (
+        <TransferProgress progress={progress} finalTotals={finalTotals} />
+      )}
+
       <Card className="flex flex-col min-h-0">
         <div className="flex items-center justify-between px-4 py-3 border-b border-border shrink-0">
           <div className="flex items-center gap-2">
@@ -378,6 +430,23 @@ export default function JobDetail() {
             </>
           )}
           <div ref={logEndRef} />
+          {hasMoreLogs && (
+            <div className="flex justify-center py-2">
+              <Button
+                variant="secondary"
+                size="sm"
+                onClick={async () => {
+                  setLoadingMore(true);
+                  await loadLogs(logs.length);
+                  setLoadingMore(false);
+                }}
+                disabled={loadingMore}
+              >
+                <ChevronDown className="h-4 w-4" />
+                {loadingMore ? 'Loading...' : 'Load more'}
+              </Button>
+            </div>
+          )}
         </div>
       </Card>
 
@@ -452,3 +521,86 @@ function LogLine({
     </div>
   );
 }
+
+function formatBytes(bytes: number): string {
+  if (bytes === 0) return '0 B';
+  const units = ['B', 'kB', 'MB', 'GB', 'TB'];
+  const i = Math.floor(Math.log(bytes) / Math.log(1024));
+  return `${(bytes / Math.pow(1024, i)).toFixed(1)} ${units[i]}`;
+}
+
+function formatSpeed(bps: number): string {
+  if (bps === 0) return '0 B/s';
+  const units = ['B/s', 'kB/s', 'MB/s', 'GB/s'];
+  const i = Math.floor(Math.log(bps) / Math.log(1000));
+  return `${(bps / Math.pow(1000, i)).toFixed(1)} ${units[i]}`;
+}
+
+function TransferProgress({
+  progress,
+  finalTotals,
+}: {
+  progress: SSEProgress | null;
+  finalTotals: { totalBytes: number; sentBytes: number } | null;
+}) {
+  const globalPct = finalTotals && finalTotals.totalBytes > 0
+    ? Math.round((finalTotals.sentBytes / finalTotals.totalBytes) * 100)
+    : null;
+
+  return (
+    <Card>
+      <div className="p-4 space-y-3">
+        <div className="flex items-center gap-2">
+          <Activity className="h-4 w-4 text-accent" />
+          <span className="text-xs font-semibold text-fg-muted uppercase tracking-wider">
+            Transfer Progress
+          </span>
+        </div>
+
+        {progress && (
+          <>
+            <div className="space-y-1.5">
+              <div className="flex justify-between text-xs text-fg-muted">
+                <span>Current file</span>
+                <span>{progress.pct}%</span>
+              </div>
+              <div className="h-2 bg-border rounded-full overflow-hidden">
+                <div
+                  className="h-full bg-accent transition-all duration-300 rounded-full"
+                  style={{ width: `${progress.pct}%` }}
+                />
+              </div>
+            </div>
+
+            <div className="flex justify-between text-xs text-fg-muted">
+              <span className="font-mono">
+                xfr#{(progress.xfr_done).toLocaleString()}/{progress.xfr_total > 0 ? progress.xfr_total.toLocaleString() : '?'}
+              </span>
+              <span className="font-mono">
+                {formatSpeed(progress.speed_bps)}
+              </span>
+              <span className="font-mono">
+                ETA {progress.eta_seconds > 0 ? `${Math.floor(progress.eta_seconds / 60)}m ${progress.eta_seconds % 60}s` : '-'}
+              </span>
+            </div>
+          </>
+        )}
+
+        {finalTotals && (
+          <div className="space-y-1.5">
+            <div className="flex justify-between text-xs text-fg-muted">
+              <span>Total transferred</span>
+              <span>{globalPct}% — {formatBytes(finalTotals.sentBytes)} / {formatBytes(finalTotals.totalBytes)}</span>
+            </div>
+            <div className="h-2 bg-border rounded-full overflow-hidden">
+              <div
+                className="h-full bg-emerald-500 transition-all duration-300 rounded-full"
+                style={{ width: `${globalPct ?? 0}%` }}
+              />
+            </div>
+          </div>
+        )}
+      </div>
+    </Card>
+  );
+}

web/src/pages/Machines.tsx

@@ -1,10 +1,11 @@
 import { useEffect, useState } from 'react';
-import { api, Machine, SSHKey, TestConnectionResponse } from '../api/client';
+import { api, Machine, SSHKey, TestConnectionResponse, deployKeys, DeployKeysResponse, shutdownMachine, ShutdownResponse } from '../api/client';
 import { Button } from '@/components/ui/Button';
 import { Input } from '@/components/ui/Input';
 import { Label } from '@/components/ui/Label';
 import { Select, SelectValue, SelectTrigger, SelectContent, SelectItem } from '@/components/ui/Select';
 import { Badge } from '@/components/ui/Badge';
+import { statusVariant } from '@/lib/status';
 import {
   Modal,
   ModalContent,
@@ -26,7 +27,7 @@ import {
 import { EmptyState } from '@/components/ui/EmptyState';
 import { CopyButton } from '@/components/ui/CopyButton';
 import { Card } from '@/components/ui/Card';
-import { Pencil, Trash2, Plus, Server, Zap, Cable } from 'lucide-react';
+import { Pencil, Trash2, Plus, Server, Zap, Cable, KeyRound, Power } from 'lucide-react';
 import { toast } from 'sonner';
 import { cn } from '@/lib/utils';
 import { subscribeMachineStatus } from '@/lib/sse';
@@ -43,6 +44,7 @@ type MachineForm = {
   broadcast_addr: string;
   wake_timeout_seconds: number;
   wake_check_interval_seconds: number;
+  shutdown_command: string;
 };
 
 const defaultForm: MachineForm = {
@@ -57,6 +59,7 @@ const defaultForm: MachineForm = {
   broadcast_addr: '',
   wake_timeout_seconds: 180,
   wake_check_interval_seconds: 5,
+  shutdown_command: 'shutdown now',
 };
 
 export default function Machines() {
@@ -68,6 +71,8 @@ export default function Machines() {
   const [loading, setLoading] = useState(false);
   const [probing, setProbing] = useState(false);
   const [connModal, setConnModal] = useState<{ machine: Machine | null; result: TestConnectionResponse | null; loading: boolean }>({ machine: null, result: null, loading: false });
+  const [deployModal, setDeployModal] = useState<{ machine: Machine | null; result: DeployKeysResponse | null; loading: boolean }>({ machine: null, result: null, loading: false });
+  const [shutdownModal, setShutdownModal] = useState<{ machine: Machine | null; result: ShutdownResponse | null; loading: boolean }>({ machine: null, result: null, loading: false });
 
   useEffect(() => {
     load();
@@ -117,6 +122,7 @@ export default function Machines() {
       broadcast_addr: m.broadcast_addr || '',
       wake_timeout_seconds: m.wake_timeout_seconds || 180,
       wake_check_interval_seconds: m.wake_check_interval_seconds || 5,
+      shutdown_command: m.shutdown_command || 'shutdown now',
     });
     setModalOpen(true);
   }
@@ -148,6 +154,7 @@ export default function Machines() {
         broadcast_addr: form.broadcast_addr || null,
         wake_timeout_seconds: Number(form.wake_timeout_seconds),
         wake_check_interval_seconds: Number(form.wake_check_interval_seconds),
+        shutdown_command: form.shutdown_command || 'shutdown now',
       };
       await api(form.id ? `/api/machines/${form.id}` : '/api/machines', {
         method: form.id ? 'PUT' : 'POST',
@@ -213,6 +220,20 @@ export default function Machines() {
     setConnModal({ machine: null, result: null, loading: false });
   }
 
+  async function handleDeployKeys(m: Machine) {
+    setDeployModal({ machine: m, result: null, loading: true });
+    try {
+      const result = await deployKeys(m.id);
+      setDeployModal({ machine: m, result, loading: false });
+    } catch (e: unknown) {
+      setDeployModal({ machine: m, result: { success: false, messages: [], errors: [(e as Error).message] }, loading: false });
+    }
+  }
+
+  function closeDeployModal() {
+    setDeployModal({ machine: null, result: null, loading: false });
+  }
+
   function keyLabel(id: number | null) {
     if (!id) return 'Server Key';
     const k = sshKeys.find(k => k.id === id);
@@ -263,6 +284,7 @@ export default function Machines() {
                   <TableHead>WoL</TableHead>
                   <TableHead>WoL Timeout</TableHead>
                   <TableHead>Status</TableHead>
+                  <TableHead>Last Seen</TableHead>
                   <TableHead className="w-24">Actions</TableHead>
                 </TableRow>
               </TableHeader>
@@ -297,6 +319,11 @@ export default function Machines() {
                     <TableCell>
                       <StatusBadge status={m.status} />
                     </TableCell>
+                    <TableCell>
+                      <span className="text-xs text-fg-muted">
+                        {m.last_seen_at ? new Date(m.last_seen_at).toLocaleString() : <span className="text-fg-subtle">—</span>}
+                      </span>
+                    </TableCell>
                     <TableCell>
                       <div className="flex items-center gap-1">
                         <Button
@@ -315,6 +342,14 @@ export default function Machines() {
                         >
                           <Cable className="h-3.5 w-3.5" />
                         </Button>
+                        <Button
+                          variant="ghost"
+                          size="icon-sm"
+                          onClick={() => handleDeployKeys(m)}
+                          title="Deploy SSH Keys"
+                        >
+                          <KeyRound className="h-3.5 w-3.5" />
+                        </Button>
                         {m.wol_enabled && (
                           <Button
                             variant="ghost"
@@ -325,6 +360,15 @@ export default function Machines() {
                             <Zap className="h-3.5 w-3.5" />
                           </Button>
                         )}
+                        <Button
+                          variant="ghost"
+                          size="icon-sm"
+                          onClick={() => setShutdownModal({ machine: m, result: null, loading: false })}
+                          title="Shutdown"
+                          className="text-amber-400 hover:text-amber-300 hover:bg-amber-500/10"
+                        >
+                          <Power className="h-3.5 w-3.5" />
+                        </Button>
                         <Button
                           variant="ghost"
                           size="icon-sm"
@@ -514,6 +558,20 @@ export default function Machines() {
                   </div>
                 </div>
               )}
+              <div className="space-y-1.5">
+                <Label htmlFor="shutdown_command">Shutdown Command</Label>
+                <Input
+                  id="shutdown_command"
+                  placeholder="shutdown now"
+                  value={form.shutdown_command}
+                  onChange={e =>
+                    setForm({ ...form, shutdown_command: e.target.value })
+                  }
+                />
+                <p className="text-xs text-fg-subtle">
+                  Command sent via SSH to power off the machine. Leave blank to use the default.
+                </p>
+              </div>
             </ModalBody>
             <ModalFooter>
               <Button
@@ -551,6 +609,76 @@ export default function Machines() {
         </ModalContent>
       </Modal>
 
+      <Modal open={shutdownModal.machine !== null} onOpenChange={v => !v && setShutdownModal({ machine: null, result: null, loading: false })}>
+        <ModalContent size="md">
+          <ModalHeader>
+            <ModalTitle>Shutdown Machine</ModalTitle>
+            <ModalDescription>
+              Are you sure you want to power off <strong>{shutdownModal.machine?.name}</strong>? You will need physical or remote access to power it back on.
+            </ModalDescription>
+          </ModalHeader>
+          <ModalBody className="space-y-4">
+            {shutdownModal.machine?.wol_enabled && (
+              <div className="rounded-card bg-sky-500/10 border border-sky-500/30 p-3 text-xs text-sky-300">
+                Wake-on-LAN is enabled — you can power this machine back on remotely.
+              </div>
+            )}
+            {shutdownModal.loading && (
+              <div className="flex items-center justify-center py-8">
+                <div className="h-6 w-6 border-2 border-accent border-t-transparent rounded-full animate-spin" />
+              </div>
+            )}
+            {!shutdownModal.loading && shutdownModal.result && (
+              shutdownModal.result.success ? (
+                <div className="rounded-card bg-emerald-500/10 border border-emerald-500/30 p-4">
+                  <p className="text-sm font-medium text-emerald-400">Shutdown command sent</p>
+                  {shutdownModal.result.output && (
+                    <pre className="text-xs text-fg-muted mt-1 whitespace-pre-wrap">{shutdownModal.result.output}</pre>
+                  )}
+                </div>
+              ) : (
+                <div className="rounded-card bg-rose-500/10 border border-rose-500/30 p-4">
+                  <p className="text-sm font-medium text-rose-400">Shutdown failed</p>
+                  <p className="text-xs text-fg-muted mt-1">{shutdownModal.result.error}</p>
+                </div>
+              )
+            )}
+          </ModalBody>
+          <ModalFooter>
+            <Button variant="secondary" onClick={() => setShutdownModal({ machine: null, result: null, loading: false })}>
+              {shutdownModal.result ? 'Close' : 'Cancel'}
+            </Button>
+            {!shutdownModal.result && (
+              <Button
+                variant="danger-solid"
+                loading={shutdownModal.loading}
+                onClick={async () => {
+                  if (!shutdownModal.machine) return;
+                  setShutdownModal(s => ({ ...s, loading: true }));
+                  try {
+                    const result = await shutdownMachine(shutdownModal.machine.id);
+                    setShutdownModal({ machine: shutdownModal.machine, result, loading: false });
+                    if (result.success) {
+                      toast.success(`Shutdown command sent to ${shutdownModal.machine.name}`);
+                    } else {
+                      toast.error(`Shutdown failed: ${result.error}`);
+                    }
+                  } catch (e) {
+                    setShutdownModal({
+                      machine: shutdownModal.machine,
+                      result: { success: false, error: (e as Error).message },
+                      loading: false,
+                    });
+                  }
+                }}
+              >
+                Shutdown
+              </Button>
+            )}
+          </ModalFooter>
+        </ModalContent>
+      </Modal>
+
       <Modal open={connModal.machine !== null} onOpenChange={v => !v && closeConnModal()}>
         <ModalContent size="md">
           <ModalHeader>
@@ -607,7 +735,7 @@ export default function Machines() {
             <Button variant="secondary" onClick={closeConnModal}>
               Close
             </Button>
-            {!connModal.loading && connModal.result && !connModal.result.success && connModal.result.fingerprint && connModal.machine && !connModal.machine.fingerprint_confirmed && (
+            {!connModal.loading && connModal.result && connModal.result.fingerprint && connModal.machine && !connModal.machine.fingerprint_confirmed && (
               <Button onClick={handleApproveFingerprint}>
                 Approve &amp; Trust Fingerprint
               </Button>
@@ -615,16 +743,63 @@ export default function Machines() {
           </ModalFooter>
         </ModalContent>
       </Modal>
+
+      <Modal open={deployModal.machine !== null} onOpenChange={v => !v && closeDeployModal()}>
+        <ModalContent size="md">
+          <ModalHeader>
+            <ModalTitle>Deploy SSH Keys</ModalTitle>
+            <ModalDescription>
+              {deployModal.machine?.name} ({deployModal.machine?.host}:{deployModal.machine?.port})
+            </ModalDescription>
+          </ModalHeader>
+          <ModalBody className="space-y-4">
+            {deployModal.loading && (
+              <div className="flex flex-col items-center justify-center py-8 gap-3">
+                <div className="h-6 w-6 border-2 border-accent border-t-transparent rounded-full animate-spin" />
+                <p className="text-sm text-fg-muted">Deploying keys...</p>
+              </div>
+            )}
+            {!deployModal.loading && deployModal.result && (
+              <div className="space-y-4">
+                {deployModal.result.success ? (
+                  <div className="rounded-card bg-emerald-500/10 border border-emerald-500/30 p-4">
+                    <p className="text-sm font-medium text-emerald-400 mb-2">Deployment successful</p>
+                    <ul className="space-y-1">
+                      {(deployModal.result.messages ?? []).map((msg, i) => (
+                        <li key={i} className="text-xs text-fg-muted flex items-start gap-2">
+                          <span className="text-emerald-400 mt-0.5">&#10003;</span>
+                          {msg}
+                        </li>
+                      ))}
+                    </ul>
+                  </div>
+                ) : (
+                  <div className="rounded-card bg-rose-500/10 border border-rose-500/30 p-4">
+                    <p className="text-sm font-medium text-rose-400 mb-2">Deployment failed</p>
+                    <ul className="space-y-1">
+                      {(deployModal.result.errors ?? []).map((err, i) => (
+                        <li key={i} className="text-xs text-fg-muted flex items-start gap-2">
+                          <span className="text-rose-400 mt-0.5">&#10007;</span>
+                          {err}
+                        </li>
+                      ))}
+                    </ul>
+                  </div>
+                )}
+              </div>
+            )}
+          </ModalBody>
+          <ModalFooter>
+            <Button variant="secondary" onClick={closeDeployModal}>
+              Close
+            </Button>
+          </ModalFooter>
+        </ModalContent>
+      </Modal>
     </div>
   );
 }
 
 function StatusBadge({ status }: { status: string }) {
-  const variant =
-    status === 'online'
-      ? 'success'
-      : status === 'offline'
-        ? 'neutral'
-        : 'info';
-  return <Badge variant={variant} label={status} />;
+  return <Badge variant={statusVariant(status)} label={status} />;
 }

web/src/pages/Schedules.tsx

@@ -0,0 +1,334 @@
+import { useEffect, useState } from 'react';
+import { api, SyncPair, Schedule } from '../api/client';
+import { Button } from '@/components/ui/Button';
+import { Input } from '@/components/ui/Input';
+import { Label } from '@/components/ui/Label';
+import { Select, SelectValue, SelectTrigger, SelectContent, SelectItem } from '@/components/ui/Select';
+import {
+  Modal,
+  ModalContent,
+  ModalHeader,
+  ModalTitle,
+  ModalDescription,
+  ModalBody,
+  ModalFooter,
+} from '@/components/ui/Modal';
+import { PageHeader } from '@/components/ui/PageHeader';
+import {
+  Table,
+  TableHeader,
+  TableBody,
+  TableHead,
+  TableRow,
+  TableCell,
+} from '@/components/ui/Table';
+import { EmptyState } from '@/components/ui/EmptyState';
+import { Badge } from '@/components/ui/Badge';
+import { Card } from '@/components/ui/Card';
+import { Trash2, Plus, Clock, Pencil, AlertTriangle } from 'lucide-react';
+import { toast } from 'sonner';
+import { cn } from '@/lib/utils';
+
+type ScheduleForm = {
+  id: number | undefined;
+  sync_pair_id: number | null;
+  cron_expr: string;
+  enabled: boolean;
+};
+
+const defaultForm: ScheduleForm = {
+  id: undefined,
+  sync_pair_id: null,
+  cron_expr: '',
+  enabled: true,
+};
+
+export default function Schedules() {
+  const [schedules, setSchedules] = useState<Schedule[]>([]);
+  const [syncPairs, setSyncPairs] = useState<SyncPair[]>([]);
+  const [modalOpen, setModalOpen] = useState(false);
+  const [deleteId, setDeleteId] = useState<number | null>(null);
+  const [form, setForm] = useState<ScheduleForm>(defaultForm);
+  const [loading, setLoading] = useState(false);
+
+  useEffect(() => {
+    load();
+  }, []);
+
+  async function load() {
+    try {
+      const [s, p] = await Promise.all([
+        api<Schedule[]>('/api/schedules'),
+        api<SyncPair[]>('/api/sync-pairs'),
+      ]);
+      setSchedules(s);
+      setSyncPairs(p);
+    } catch {}
+  }
+
+  function openCreate() {
+    setForm(defaultForm);
+    setModalOpen(true);
+  }
+
+  async function handleSubmit(e: React.FormEvent) {
+    e.preventDefault();
+    if (!form.sync_pair_id) {
+      toast.error('Sync pair is required');
+      return;
+    }
+    if (!form.cron_expr.trim()) {
+      toast.error('Cron expression is required');
+      return;
+    }
+    setLoading(true);
+    try {
+      await api(form.id ? `/api/schedules/${form.id}` : '/api/schedules', {
+        method: form.id ? 'PUT' : 'POST',
+        body: {
+          sync_pair_id: form.sync_pair_id,
+          cron_expr: form.cron_expr,
+          enabled: form.enabled,
+        },
+      });
+      setModalOpen(false);
+      toast.success(form.id ? 'Schedule updated' : 'Schedule created');
+      load();
+    } catch (e: unknown) {
+      toast.error((e as Error).message);
+    } finally {
+      setLoading(false);
+    }
+  }
+
+  async function handleToggleEnabled(schedule: Schedule) {
+    try {
+      await api(`/api/schedules/${schedule.id}`, {
+        method: 'PUT',
+        body: {
+          cron_expr: schedule.cron_expr,
+          enabled: !schedule.enabled,
+        },
+      });
+      toast.success(`Schedule ${schedule.enabled ? 'disabled' : 'enabled'}`);
+      load();
+    } catch (e: unknown) {
+      toast.error((e as Error).message);
+    }
+  }
+
+  async function handleDelete() {
+    if (deleteId === null) return;
+    try {
+      await api(`/api/schedules/${deleteId}`, { method: 'DELETE' });
+      toast.success('Schedule deleted');
+      setDeleteId(null);
+      load();
+    } catch (e: unknown) {
+      toast.error((e as Error).message);
+    }
+  }
+
+  function syncPairName(id: number) {
+    const p = syncPairs.find(p => p.id === id);
+    return p ? p.name : `Sync Pair ${id}`;
+  }
+
+  function formatNextRun(nextRun: string | null) {
+    if (!nextRun) return 'Not scheduled';
+    const d = new Date(nextRun);
+    return d.toLocaleString();
+  }
+
+  return (
+    <div className="space-y-6">
+      <PageHeader
+        title="Schedules"
+        description="Automate sync pair execution with cron-based scheduling"
+        actions={
+          <Button onClick={openCreate} size="sm">
+            <Plus className="h-4 w-4" />
+            Add Schedule
+          </Button>
+        }
+      />
+
+      <Card>
+        <div className="p-0">
+          {schedules.length === 0 ? (
+            <EmptyState
+              icon={<Clock className="h-5 w-5" />}
+              title="No schedules"
+              description="Create a schedule to automate sync pair execution"
+              action={
+                <Button onClick={openCreate} size="sm">
+                  <Plus className="h-4 w-4" />
+                  Add Schedule
+                </Button>
+              }
+            />
+          ) : (
+            <Table>
+              <TableHeader>
+                <TableRow>
+                  <TableHead>Sync Pair</TableHead>
+                  <TableHead>Cron Expression</TableHead>
+                  <TableHead>Next Run</TableHead>
+                  <TableHead>Status</TableHead>
+                  <TableHead className="w-28">Actions</TableHead>
+                </TableRow>
+              </TableHeader>
+              <TableBody>
+                {schedules.map(s => (
+                  <TableRow key={s.id}>
+                    <TableCell className="font-medium">{syncPairName(s.sync_pair_id)}</TableCell>
+                    <TableCell>
+                      <code className="text-xs bg-surface-raised px-2 py-1 rounded font-mono">
+                        {s.cron_expr}
+                      </code>
+                    </TableCell>
+                    <TableCell className="text-fg-muted text-sm">
+                      {formatNextRun(s.next_run_at)}
+                    </TableCell>
+                    <TableCell>
+                      <button
+                        onClick={() => handleToggleEnabled(s)}
+                        className={cn(
+                          'relative inline-flex h-5 w-9 items-center rounded-full transition-colors focus:outline-none focus:ring-2 focus:ring-accent/40 focus:ring-offset-2 focus:ring-offset-canvas',
+                          s.enabled ? 'bg-emerald-500/20' : 'bg-surface-raised'
+                        )}
+                      >
+                        <span
+                          className={cn(
+                            'inline-block h-3.5 w-3.5 transform rounded-full bg-fg-muted transition-transform',
+                            s.enabled ? 'translate-x-4 bg-emerald-400' : 'translate-x-1 bg-fg-subtle'
+                          )}
+                        />
+                      </button>
+                    </TableCell>
+                    <TableCell>
+                      <div className="flex items-center gap-1">
+                        <Button
+                          variant="ghost"
+                          size="icon-sm"
+                          onClick={() => setDeleteId(s.id)}
+                          className="text-rose-400 hover:text-rose-300 hover:bg-rose-500/10"
+                          title="Delete"
+                        >
+                          <Trash2 className="h-3.5 w-3.5" />
+                        </Button>
+                      </div>
+                    </TableCell>
+                  </TableRow>
+                ))}
+              </TableBody>
+            </Table>
+          )}
+        </div>
+      </Card>
+
+      <Modal open={modalOpen} onOpenChange={setModalOpen}>
+        <ModalContent size="md">
+          <ModalHeader>
+            <ModalTitle>Add Schedule</ModalTitle>
+            <ModalDescription>
+              Schedule automated sync pair execution using cron syntax.
+              Format: &quot;minute hour day-of-month month day-of-week&quot;
+            </ModalDescription>
+          </ModalHeader>
+          <form onSubmit={handleSubmit}>
+            <ModalBody className="space-y-4">
+              <div className="space-y-1.5">
+                <Label htmlFor="sch-sync-pair" required>
+                  Sync Pair
+                </Label>
+                <Select
+                  value={form.sync_pair_id?.toString() ?? ''}
+                  onValueChange={v => setForm({ ...form, sync_pair_id: Number(v) })}
+                >
+                  <SelectTrigger id="sch-sync-pair">
+                    <SelectValue placeholder="Select a sync pair" />
+                  </SelectTrigger>
+                  <SelectContent>
+                    {syncPairs.map(p => (
+                      <SelectItem key={p.id} value={p.id.toString()}>
+                        {p.name}
+                      </SelectItem>
+                    ))}
+                  </SelectContent>
+                </Select>
+              </div>
+              <div className="space-y-1.5">
+                <Label htmlFor="sch-cron" required>
+                  Cron Expression
+                </Label>
+                <Input
+                  id="sch-cron"
+                  placeholder="0 2 * * *"
+                  value={form.cron_expr}
+                  onChange={e => setForm({ ...form, cron_expr: e.target.value })}
+                  className="font-mono"
+                />
+                <p className="text-xs text-fg-subtle">
+                  Format: &quot;m h dom mon dow&quot; (5 fields, no seconds)
+                  <br />
+                  Examples: &quot;0 2 * * *&quot; (daily at 2am), &quot;0 */6 * * *&quot; (every 6 hours)
+                </p>
+              </div>
+              <div
+                className={cn(
+                  'flex items-center gap-2 rounded-card p-3 transition-colors',
+                  form.enabled
+                    ? 'bg-accent/5 border border-accent/20'
+                    : 'bg-surface-raised border border-border'
+                )}
+              >
+                <input
+                  type="checkbox"
+                  id="sch-enabled"
+                  checked={form.enabled}
+                  onChange={e => setForm({ ...form, enabled: e.target.checked })}
+                  className="h-4 w-4 rounded border-border accent-accent"
+                />
+                <Label htmlFor="sch-enabled" className="cursor-pointer mb-0">
+                  Enable this schedule
+                </Label>
+              </div>
+            </ModalBody>
+            <ModalFooter>
+              <Button
+                type="button"
+                variant="secondary"
+                onClick={() => setModalOpen(false)}
+              >
+                Cancel
+              </Button>
+              <Button type="submit" loading={loading}>
+                Add Schedule
+              </Button>
+            </ModalFooter>
+          </form>
+        </ModalContent>
+      </Modal>
+
+      <Modal open={deleteId !== null} onOpenChange={v => !v && setDeleteId(null)}>
+        <ModalContent size="sm">
+          <ModalHeader>
+            <ModalTitle>Delete Schedule</ModalTitle>
+            <ModalDescription>
+              Are you sure you want to delete this schedule?
+            </ModalDescription>
+          </ModalHeader>
+          <ModalFooter>
+            <Button variant="secondary" onClick={() => setDeleteId(null)}>
+              Cancel
+            </Button>
+            <Button variant="danger-solid" onClick={handleDelete}>
+              Delete
+            </Button>
+          </ModalFooter>
+        </ModalContent>
+      </Modal>
+    </div>
+  );
+}

web/src/pages/Settings.tsx

@@ -3,16 +3,21 @@ import { CopyButton } from '@/components/ui/CopyButton';
 import { Button } from '@/components/ui/Button';
 import { PageHeader } from '@/components/ui/PageHeader';
 import { Card, CardHeader, CardTitle, CardBody } from '@/components/ui/Card';
-import { Key, Download, Terminal } from 'lucide-react';
+import { Key, Download, Terminal, HardDrive } from 'lucide-react';
+import { api, SettingsInfo } from '../api/client';
 
 export default function Settings() {
   const [pubKey, setPubKey] = useState('');
+  const [dataDir, setDataDir] = useState('');
   const [loading, setLoading] = useState(true);
 
   useEffect(() => {
+    Promise.all([
       fetch('/api/settings/pubkey', { credentials: 'include' })
         .then(r => (r.ok ? r.text() : ''))
-      .then(t => setPubKey(t))
+        .then(t => setPubKey(t)),
+      api<SettingsInfo>('/api/settings/info').then(info => setDataDir(info.data_dir)),
+    ])
       .catch(() => {})
       .finally(() => setLoading(false));
   }, []);
@@ -75,6 +80,20 @@ export default function Settings() {
         </CardBody>
       </Card>
 
+      <Card>
+        <CardHeader>
+          <div className="flex items-center gap-2">
+            <div className="rounded-card bg-accent/10 p-1">
+              <HardDrive className="h-4 w-4 text-accent" />
+            </div>
+            <CardTitle>Data Directory</CardTitle>
+          </div>
+        </CardHeader>
+        <CardBody>
+          <div className="text-sm font-mono text-fg">{dataDir || '-'}</div>
+        </CardBody>
+      </Card>
+
       <Card>
         <CardHeader>
           <div className="flex items-center gap-2">

web/src/pages/SyncPairs.tsx

@@ -26,7 +26,7 @@ import {
 import { EmptyState } from '@/components/ui/EmptyState';
 import { Badge } from '@/components/ui/Badge';
 import { Card } from '@/components/ui/Card';
-import { Play, Trash2, Plus, GitCompare, ArrowRight, ArrowLeft, Pencil } from 'lucide-react';
+import { Play, Trash2, Plus, GitCompare, ArrowRight, ArrowLeft, Pencil, AlertTriangle } from 'lucide-react';
 import { toast } from 'sonner';
 import { cn } from '@/lib/utils';
 
@@ -111,6 +111,14 @@ export default function SyncPairs() {
       toast.error('Source and destination paths are required');
       return;
     }
+    if (
+      form.source_machine_id !== null &&
+      form.dest_machine_id !== null &&
+      form.source_machine_id === form.dest_machine_id
+    ) {
+      toast.error('Source and destination cannot be the same machine');
+      return;
+    }
     setLoading(true);
     try {
       await api(form.id ? `/api/sync-pairs/${form.id}` : '/api/sync-pairs', {
@@ -287,8 +295,8 @@ export default function SyncPairs() {
             <ModalTitle>{form.id ? 'Edit Sync Pair' : 'Add Sync Pair'}</ModalTitle>
             <ModalDescription>
               {form.id
-                ? 'Update the configuration for this sync pair'
-                : 'Define a new source and destination for data syncing'}
+                ? 'Update this sync pair. Direction: push (src→dst), pull (dst←src), or mirror (push + --delete).'
+                : 'Define source and destination for data syncing. Pick a direction: push (src→dst), pull (dst←src), or mirror (push + --delete).'}
             </ModalDescription>
           </ModalHeader>
           <form onSubmit={handleSubmit}>
@@ -325,6 +333,9 @@ export default function SyncPairs() {
                       ))}
                     </SelectContent>
                   </Select>
+                  <p className="text-xs text-fg-subtle">
+                    Where the data lives. Pick <span className="font-medium">Local server</span> if it&apos;s on this machine, otherwise the remote machine holding the data.
+                  </p>
                 </div>
                 <div className="space-y-1.5">
                   <Label htmlFor="sp-dest-machine">Dest Machine</Label>
@@ -346,6 +357,9 @@ export default function SyncPairs() {
                       ))}
                     </SelectContent>
                   </Select>
+                  <p className="text-xs text-fg-subtle">
+                    Where to copy the data. Can be the same machine (no-op) or any remote. Remote-to-remote is supported.
+                  </p>
                 </div>
               </div>
               <div className="grid grid-cols-2 gap-3">
@@ -361,6 +375,9 @@ export default function SyncPairs() {
                       setForm({ ...form, source_path: e.target.value })
                     }
                   />
+                  <p className="text-xs text-fg-subtle">
+                    Directory on the source machine. Its <span className="font-medium">contents</span> will be copied into the destination. Trailing <code className="font-mono">/</code> is optional.
+                  </p>
                 </div>
                 <div className="space-y-1.5">
                   <Label htmlFor="sp-dest-path" required>
@@ -374,6 +391,9 @@ export default function SyncPairs() {
                       setForm({ ...form, dest_path: e.target.value })
                     }
                   />
+                  <p className="text-xs text-fg-subtle">
+                    Directory on the destination machine where the source contents will land.
+                  </p>
                 </div>
               </div>
               <div className="grid grid-cols-2 gap-3">
@@ -394,6 +414,12 @@ export default function SyncPairs() {
                       <SelectItem value="mirror">Mirror</SelectItem>
                     </SelectContent>
                   </Select>
+                  <p className="text-xs text-fg-subtle">
+                    <span className="font-medium">Push</span> copies source → destination.{' '}
+                    <span className="font-medium">Pull</span> reverses it (dest ← source).{' '}
+                    <span className="font-medium">Mirror</span> is like push but adds{' '}
+                    <code className="font-mono">--delete</code> (see warning).
+                  </p>
                 </div>
                 <div className="space-y-1.5">
                   <Label htmlFor="sp-rsync-flags">Rsync Flags</Label>
@@ -407,6 +433,22 @@ export default function SyncPairs() {
                   />
                 </div>
               </div>
+              {form.direction === 'mirror' && (
+                <div
+                  role="alert"
+                  className="flex items-start gap-2 rounded-card p-3 bg-amber-500/10 border border-amber-500/30"
+                >
+                  <AlertTriangle className="h-4 w-4 text-amber-400 shrink-0 mt-0.5" />
+                  <div className="text-xs text-amber-200 leading-relaxed">
+                    <span className="font-semibold">Mirror will delete files.</span>{' '}
+                    With <code className="font-mono">--delete</code>, any file in the
+                    destination that doesn&apos;t exist in the source is permanently
+                    removed. Double-check both paths before saving — a wrong
+                    destination (e.g. <code className="font-mono">/</code> or{' '}
+                    <code className="font-mono">/home</code>) can wipe data.
+                  </div>
+                </div>
+              )}
               <div className="space-y-1.5">
                 <Label htmlFor="sp-exclude">Exclude Patterns</Label>
                 <Textarea