feat: external importers + uptime monitors (merge plan M1)

Two tracks from the Beszel/Domain-Locker merge plan in ROADMAP.md:

- Importers: POST /api/import/external sniffs Homepage services.yml,
  Homarr JSON, and Dashy conf.yml into sections/items; SettingsDialog
  import now accepts all four formats.
- Monitors (M1): monitors + heartbeats schema, pure checkers for
  http/tcp/ping/dns/keyword/json-query/push, scheduler on app ctx,
  CRUD + check-now + push ingest API, /monitors + /monitors/:id pages
  (wouter), monitor board widget, ServiceDialog monitor opt-in.

Authored By: TDvorak <[email protected]>

Generated with Devin (https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

ROADMAP.md

@@ -34,6 +34,10 @@ or popover logic.
 | `v0.1.0` | Phase 0 + 1 — working MVP, single image | manual smoke test ✅ |
 | `v0.2.0` | Phase 2 — widget layer + first integrations | Pi-hole widget live ✅ |
 | `v0.3.0` | Phase 3 — four renderers, ⌘K palette, icon suggest | palette + switcher live ✅ |
+| `v0.4.0` | Phase M1 — uptime monitors + alerts backbone | monitor lifecycle live |
+| `v0.5.0` | Phase M2 — domain intelligence | domain lookup + expiry alerts |
+| `v0.6.0` | Phase M3 — system monitoring + agent | agent ingest + charts |
+| `v0.7.0` | Phase M4 — incidents, status pages, badges, metrics | public status page live |
 | `v1.0.0` | Phase 4 — OSS polish, docs, importers, CI releases | public repo launch |
 | `v1.x` | Phase 5 — demand-driven extras only | per-feature |
 
@@ -113,6 +117,78 @@ The product's spine: sections, services, drag-drop, multi-URL.
 
 **Exit:** all four renderers work off the same board state; palette navigates everything. — verified: both new renderers render/persist/dnd/collapse, palette filters and executes, icon suggest resolves real CDN assets, 360px + light theme, docker image 43.9 MB.
 
+## Merge program — Beszel fork → Dash
+
+Source: the local Beszel fork (`~/Desktop/PROG+HTML/Beszel` — PocketBase hub
+with custom monitors/domains/status-pages) plus lissy93/domain-locker as
+design inspiration. Upstream references cloned to `../_ref/beszel` and
+`../_ref/domain-locker` for consultation only.
+
+**No code moves verbatim.** The fork is PocketBase collections + its own
+auth + a WebSocket agent; Dash is Gin + SQLite + goose with no auth. We port
+data models, check logic, and lookup pipelines — DB, API, and UI layers are
+re-implemented on Dash conventions.
+
+**Deployment reality.** Monitoring needs a persistent process (schedulers),
+non-HTTP egress (WHOIS :43, ICMP, SMTP, raw TCP), and a writable DB. None of
+that exists on serverless — Vercel cannot host this product, full stop. The
+deploy story stays `docker run` + GHCR image + goreleaser binaries; agents
+are a second small binary.
+
+**UI model.** The app becomes routed: `/` board (default), `/monitors`,
+`/domains`, `/systems`, `/status/:slug` (public, no board chrome). Router:
+`wouter` (~2 kB — every route we need, nothing more). Charts: `recharts`.
+Board widgets surface monitoring entities through the existing widget
+registry — monitor uptime, domain expiry, system gauges — so the board
+becomes the summary layer over the monitoring pages.
+
+### Phase M1 — Monitors → v0.4.0
+
+Uptime checking: the backbone everything else hangs off.
+
+- [ ] Schema: `monitors` (name, type, url/hostname/port, method, keyword, json_query, expected_value, interval_s, timeout_s, retries, active, status, tags, notes), `heartbeats` (monitor_id, status, ping_ms, msg, cert_expiry, checked_at — 30-day retention prune)
+- [ ] In-process scheduler: due-monitor sweep, bounded worker pool, heartbeat write, status transitions
+- [ ] Checkers: `http`/`https`, `tcp`, `ping` (unprivileged ICMP datagram via `x/net/icmp` — distroless has no ping binary), `dns`, `keyword`, `json-query`, `push` (caller-generated ingest URL)
+- [ ] API: `/api/monitors` CRUD, `/:id/heartbeats?range=`, pause/resume, check-now
+- [ ] Monitors page (status, uptime 24h/30d, ping, interval) + detail (response chart, heartbeat log)
+- [ ] Board widget type `monitor` bound to a monitor id
+- [ ] ServiceDialog checkbox: create matching http monitor from a service URL
+- [ ] The fork's ~30 exotic monitor types were TCP stubs — not ported. Real types only.
+
+### Phase M2 — Domains → v0.5.0
+
+Domain-locker-grade domain intelligence.
+
+- [ ] Schema: `domains` (core columns + `extra` JSON for the long tail), `domain_history` (domain_id, change_type, field, old, new, at)
+- [ ] Lookup pipeline ported from fork `hub/domains/whois/lookup.go`, trimmed: RDAP over HTTPS → native WHOIS TCP:43 + parser; SSL chain via `crypto/tls`; DNS (NS/MX/TXT/A/AAAA) via `net.Resolver`; host geo via ip-api; provider detection via fork `detect/providers.go`; favicon
+- [ ] Daily scheduler + manual refresh; field diffs recorded to `domain_history`
+- [ ] Alerts: `alert_rules` + `notifications` tables; dispatchers — generic webhook (JSON POST), SMTP via `net/smtp`, Discord/Slack presets. Triggers: domain expiry ≤ N days, SSL expiry ≤ N days, monitor down/recovered (M1), system offline (M3)
+- [ ] Domains page + detail (expiry countdown, registrar, SSL, DNS, subdomains)
+- [ ] Board widget `domain` (expiry countdown)
+- [ ] Subdomain discovery: port `subdomain_discovery.go`, opt-in per domain
+- [ ] Not ported (v1): whoisxml API, EURid web scraping, SEO/robots parsing, valuation estimates — demand only
+
+### Phase M3 — Systems → v0.6.0
+
+Beszel-style server monitoring, push-based.
+
+- [ ] Schema: `systems` (name, token, host, os/arch, last_seen, status), `system_stats` (system_id, ts, cpu, mem, disk, net, load, temps JSON, containers JSON — retention prune)
+- [ ] Ingest: `POST /api/systems/ingest` with per-system bearer token; offline when silent > 3× interval
+- [ ] `cmd/dash-agent`: Linux-first collector — `/proc` (cpu/mem/net/load/uptime), `/sys` hwmon temps, statfs disk; container stats when `/var/run/docker.sock` present; POST every 10s; systemd unit + Dockerfile
+- [ ] Systems page (gauge cards, uptime, last seen) + detail (recharts: cpu%, mem, disk io, net, temps)
+- [ ] Board widget `system` (cpu/mem bars)
+- [ ] Not ported: the beszel agent protocol (SSH/WS into PocketBase) — our agent is push-JSON. SMART/ZFS/GPU metrics deferred to demand.
+
+### Phase M4 — Ops layer → v0.7.0
+
+- [ ] Incidents: `incidents` + `incident_updates`; manual CRUD + auto-open on monitor down, auto-resolve on recovery; severity + status flow (open → ack → resolved → closed)
+- [ ] Maintenance windows: `maintenance_windows`; suppress alerts, show `maintenance` state while active
+- [ ] Status pages: `status_pages` + `status_page_monitors`; public `/status/:slug` route + public API endpoint
+- [ ] Badges: `GET /badge/:kind/:id.svg` — stateless SVG from live data (status/uptime/response/domain/system)
+- [ ] `GET /metrics` Prometheus exposition
+- [ ] Bulk: CSV import monitors + domains; JSON export folded into existing `/api/export`
+- [ ] ⌘K palette + header nav wired for new pages
+
 ## Phase 4 — Open-source launch → v1.0.0
 
 - [ ] Docs: install, configuration, widget development guide (`docs/`)

apps/backend/cmd/dash/main.go

@@ -42,8 +42,11 @@ func main() {
 	}
 	defer func() { _ = sqlDB.Close() }()
 
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
 	iconsDir := filepath.Join(dataDir, "icons")
-	router := api.NewRouter(logger, sqlDB, iconsDir)
+	router := api.NewRouter(ctx, logger, sqlDB, iconsDir)
 	if err := web.Register(router); err != nil {
 		logger.Fatal("register embedded UI", zap.Error(err))
 	}
@@ -51,9 +54,6 @@ func main() {
 	addr := ":" + envOr("DASH_PORT", "8080")
 	srv := &http.Server{Addr: addr, Handler: router, ReadHeaderTimeout: 10 * time.Second}
 
-	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
-	defer stop()
-
 	go func() {
 		logger.Info("listening", zap.String("addr", addr), zap.String("data", dataDir))
 		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {

apps/backend/go.mod

@@ -4,8 +4,10 @@ go 1.27
 
 require (
 	github.com/gin-gonic/gin v1.12.0
+	github.com/goccy/go-yaml v1.19.2
 	github.com/pressly/goose/v3 v3.28.0
 	go.uber.org/zap v1.28.0
+	golang.org/x/net v0.58.0
 	modernc.org/sqlite v1.59.0
 )
 
@@ -21,7 +23,6 @@ require (
 	github.com/go-playground/universal-translator v0.18.1 // indirect
 	github.com/go-playground/validator/v10 v10.30.1 // indirect
 	github.com/goccy/go-json v0.10.5 // indirect
-	github.com/goccy/go-yaml v1.19.2 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
@@ -42,7 +43,6 @@ require (
 	go.uber.org/multierr v1.11.0 // indirect
 	golang.org/x/arch v0.22.0 // indirect
 	golang.org/x/crypto v0.55.0 // indirect
-	golang.org/x/net v0.58.0 // indirect
 	golang.org/x/sync v0.22.0 // indirect
 	golang.org/x/sys v0.47.0 // indirect
 	golang.org/x/text v0.41.0 // indirect

apps/backend/internal/api/api.go

@@ -2,6 +2,7 @@
 package api
 
 import (
+	"context"
 	"crypto/rand"
 	"database/sql"
 	"encoding/hex"
@@ -12,25 +13,33 @@ import (
 	"time"
 
 	"github.com/gin-gonic/gin"
+	"github.com/tdvorak/dash/internal/widget"
 	"go.uber.org/zap"
 )
 
-// Server holds handler dependencies: DB, icon dir, status + widget caches.
+// Server holds handler dependencies: DB, icon dir, logger, caches.
 type Server struct {
 	db       *sql.DB
 	iconsDir string
+	log      *zap.Logger
 	status   *statusCache
 	widgets  *widgetCache
 }
 
 // NewRouter builds the HTTP handler: zap access log, recovery, /api routes.
-func NewRouter(logger *zap.Logger, db *sql.DB, iconsDir string) *gin.Engine {
+// A non-nil ctx starts the monitor scheduler; nil keeps it off (tests).
+func NewRouter(ctx context.Context, logger *zap.Logger, db *sql.DB, iconsDir string) *gin.Engine {
 	s := &Server{
 		db:       db,
 		iconsDir: iconsDir,
+		log:      logger,
 		status:   newStatusCache(60 * time.Second),
 		widgets:  newWidgetCache(30 * time.Second),
 	}
+	widget.Register(&monitorWidget{db: db})
+	if ctx != nil {
+		go s.runScheduler(ctx.Done())
+	}
 
 	r := gin.New()
 	r.Use(accessLog(logger), gin.Recovery())
@@ -51,6 +60,15 @@ func NewRouter(logger *zap.Logger, db *sql.DB, iconsDir string) *gin.Engine {
 	v1.POST("/items/:id/icon", s.uploadIcon)
 	v1.GET("/icons/:file", s.getIcon)
 
+	v1.GET("/monitors", s.listMonitorsH)
+	v1.POST("/monitors", s.createMonitor)
+	v1.GET("/monitors/:id", s.getMonitor)
+	v1.PATCH("/monitors/:id", s.patchMonitor)
+	v1.DELETE("/monitors/:id", s.deleteMonitor)
+	v1.GET("/monitors/:id/heartbeats", s.monitorHeartbeats)
+	v1.POST("/monitors/:id/check", s.checkNow)
+	v1.Any("/push/:token", s.pushIngest)
+
 	v1.GET("/status", s.getStatus)
 	v1.GET("/widgets/types", s.widgetTypes)
 	v1.GET("/widgets/:id/data", s.widgetData)
@@ -58,6 +76,7 @@ func NewRouter(logger *zap.Logger, db *sql.DB, iconsDir string) *gin.Engine {
 	v1.PUT("/settings", s.putSettings)
 	v1.GET("/export", s.exportBoard)
 	v1.POST("/import", s.importBoard)
+	v1.POST("/import/external", s.importExternal)
 
 	return r
 }

apps/backend/internal/api/api_test.go

@@ -22,7 +22,7 @@ func testServer(t *testing.T) *httptest.Server {
 	}
 	t.Cleanup(func() { d.Close() })
 	gin.SetMode(gin.TestMode)
-	return httptest.NewServer(NewRouter(zap.NewNop(), d, t.TempDir()))
+	return httptest.NewServer(NewRouter(nil, zap.NewNop(), d, t.TempDir()))
 }
 
 func do(t *testing.T, method, url, body string) (*http.Response, map[string]any) {
@@ -178,6 +178,209 @@ func TestWidgetEndpoints(t *testing.T) {
 	}
 }
 
+func TestImportExternalHomepage(t *testing.T) {
+	srv := testServer(t)
+	defer srv.Close()
+
+	body := `- Media:
+    - Plex:
+        href: http://plex.local:32400
+        icon: plex
+    - NoLink:
+        description: widget-only entry
+- Apps:
+    - Sonarr:
+        href: https://sonarr.example.com
+        icon: https://icons.example.com/sonarr.png
+`
+	res, _ := do(t, "POST", srv.URL+"/api/import/external", body)
+	if res.StatusCode != http.StatusOK {
+		t.Fatalf("homepage import: %d", res.StatusCode)
+	}
+	var secs []Section
+	resp, err := http.Get(srv.URL + "/api/sections")
+	if err != nil {
+		t.Fatalf("get sections: %v", err)
+	}
+	defer resp.Body.Close()
+	if err := json.NewDecoder(resp.Body).Decode(&secs); err != nil {
+		t.Fatalf("decode: %v", err)
+	}
+	if len(secs) != 2 {
+		t.Fatalf("expected 2 sections, got %+v", secs)
+	}
+	media := secs[0]
+	if media.Name != "Media" || len(media.Items) != 1 {
+		t.Fatalf("bad Media section: %+v", media)
+	}
+	if media.Items[0].Name != "Plex" || len(media.Items[0].URLs) != 1 {
+		t.Fatalf("bad Plex item: %+v", media.Items[0])
+	}
+	if media.Items[0].Icon == "" {
+		t.Fatal("expected resolved CDN icon")
+	}
+	apps := secs[1]
+	if apps.Items[0].Icon != "https://icons.example.com/sonarr.png" {
+		t.Fatalf("icon passthrough failed: %+v", apps.Items[0])
+	}
+}
+
+func TestImportExternalDashy(t *testing.T) {
+	srv := testServer(t)
+	defer srv.Close()
+
+	body := `appConfig:
+  title: test
+sections:
+  - name: Media
+    items:
+      - title: Plex
+        url: http://plex.local
+        icon: favicon
+      - title: Broken
+        url: "notaurl"
+`
+	res, _ := do(t, "POST", srv.URL+"/api/import/external", body)
+	if res.StatusCode != http.StatusOK {
+		t.Fatalf("dashy import: %d", res.StatusCode)
+	}
+	var secs []Section
+	resp, err := http.Get(srv.URL + "/api/sections")
+	if err != nil {
+		t.Fatalf("get sections: %v", err)
+	}
+	defer resp.Body.Close()
+	if err := json.NewDecoder(resp.Body).Decode(&secs); err != nil {
+		t.Fatalf("decode: %v", err)
+	}
+	if len(secs) != 1 || len(secs[0].Items) != 1 {
+		t.Fatalf("bad sections: %+v", secs)
+	}
+	if secs[0].Items[0].Icon != "http://plex.local/favicon.ico" {
+		t.Fatalf("favicon resolution failed: %+v", secs[0].Items[0])
+	}
+}
+
+func TestImportExternalHomarr(t *testing.T) {
+	srv := testServer(t)
+	defer srv.Close()
+
+	body := `{"apps":[{"name":"Plex","url":"http://plex.local","icon":"hl-plex","categoryId":"c1"},{"name":"Sonarr","url":"http://sonarr.local","categoryId":"c1"}],"categories":[{"id":"c1","name":"Media"}]}`
+	res, _ := do(t, "POST", srv.URL+"/api/import/external", body)
+	if res.StatusCode != http.StatusOK {
+		t.Fatalf("homarr import: %d", res.StatusCode)
+	}
+	var secs []Section
+	resp, err := http.Get(srv.URL + "/api/sections")
+	if err != nil {
+		t.Fatalf("get sections: %v", err)
+	}
+	defer resp.Body.Close()
+	if err := json.NewDecoder(resp.Body).Decode(&secs); err != nil {
+		t.Fatalf("decode: %v", err)
+	}
+	if len(secs) != 1 || secs[0].Name != "Media" || len(secs[0].Items) != 2 {
+		t.Fatalf("bad sections: %+v", secs)
+	}
+}
+
+func TestImportExternalRejectsGarbage(t *testing.T) {
+	srv := testServer(t)
+	defer srv.Close()
+	res, body := do(t, "POST", srv.URL+"/api/import/external", `{"foo": 1}`)
+	if res.StatusCode != http.StatusBadRequest {
+		t.Fatalf("expected 400, got %d: %v", res.StatusCode, body)
+	}
+}
+
+func TestMonitorLifecycle(t *testing.T) {
+	srv := testServer(t)
+	defer srv.Close()
+
+	// Target that returns 200.
+	up := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer up.Close()
+
+	res, mv := do(t, "POST", srv.URL+"/api/monitors", `{"name":"Site","type":"http","url":"`+up.URL+`","intervalS":60}`)
+	if res.StatusCode != http.StatusCreated {
+		t.Fatalf("create: %d %v", res.StatusCode, mv)
+	}
+	id := mv["id"].(string)
+
+	// check-now -> up, heartbeat recorded.
+	res, mv = do(t, "POST", srv.URL+"/api/monitors/"+id+"/check", "")
+	if res.StatusCode != http.StatusOK || mv["status"] != "up" {
+		t.Fatalf("check-now: %d %v", res.StatusCode, mv)
+	}
+	resp, err := http.Get(srv.URL + "/api/monitors/" + id + "/heartbeats")
+	if err != nil {
+		t.Fatalf("heartbeats: %v", err)
+	}
+	var hbs []map[string]any
+	_ = json.NewDecoder(resp.Body).Decode(&hbs)
+	resp.Body.Close()
+	if len(hbs) != 1 || hbs[0]["status"] != "up" {
+		t.Fatalf("expected 1 up heartbeat, got %v", hbs)
+	}
+
+	// pause -> paused + inactive
+	res, mv = do(t, "PATCH", srv.URL+"/api/monitors/"+id, `{"active":false}`)
+	if res.StatusCode != http.StatusOK || mv["status"] != "paused" || mv["active"] != false {
+		t.Fatalf("pause: %v", mv)
+	}
+
+	// delete
+	res, _ = do(t, "DELETE", srv.URL+"/api/monitors/"+id, "")
+	if res.StatusCode != http.StatusNoContent {
+		t.Fatalf("delete: %d", res.StatusCode)
+	}
+	res, _ = do(t, "GET", srv.URL+"/api/monitors/"+id, "")
+	if res.StatusCode != http.StatusNotFound {
+		t.Fatalf("expected 404 after delete, got %d", res.StatusCode)
+	}
+}
+
+func TestMonitorCheckDown(t *testing.T) {
+	srv := testServer(t)
+	defer srv.Close()
+	res, mv := do(t, "POST", srv.URL+"/api/monitors", `{"name":"Dead","type":"http","url":"http://127.0.0.1:1","timeoutS":1}`)
+	if res.StatusCode != http.StatusCreated {
+		t.Fatalf("create: %v", mv)
+	}
+	id := mv["id"].(string)
+	res, mv = do(t, "POST", srv.URL+"/api/monitors/"+id+"/check", "")
+	if res.StatusCode != http.StatusOK || mv["status"] != "down" {
+		t.Fatalf("expected down, got %v", mv)
+	}
+}
+
+func TestPushMonitor(t *testing.T) {
+	srv := testServer(t)
+	defer srv.Close()
+	res, mv := do(t, "POST", srv.URL+"/api/monitors", `{"name":"Backup","type":"push","intervalS":60}`)
+	if res.StatusCode != http.StatusCreated {
+		t.Fatalf("create: %v", mv)
+	}
+	token, _ := mv["pushToken"].(string)
+	if token == "" {
+		t.Fatal("no push token issued")
+	}
+	res, _ = do(t, "GET", srv.URL+"/api/push/"+token+"?msg=done", "")
+	if res.StatusCode != http.StatusOK {
+		t.Fatalf("push: %d", res.StatusCode)
+	}
+	res, mv = do(t, "GET", srv.URL+"/api/monitors/"+mv["id"].(string), "")
+	if mv["status"] != "up" {
+		t.Fatalf("expected up after push, got %v", mv["status"])
+	}
+	res, _ = do(t, "GET", srv.URL+"/api/push/bogus", "")
+	if res.StatusCode != http.StatusNotFound {
+		t.Fatalf("bad token: %d", res.StatusCode)
+	}
+}
+
 func TestMidpoint(t *testing.T) {
 	f := func(v float64) *float64 { return &v }
 	if got := midpoint(nil, nil); got != 1024 {

apps/backend/internal/api/importers.go

@@ -0,0 +1,322 @@
+package api
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/goccy/go-yaml"
+)
+
+// diBase mirrors the frontend's dashboard-icons CDN root (ServiceDialog).
+const diBase = "https://cdn.jsdelivr.net/gh/homarr-labs/dashboard-icons/png"
+
+// importExternal ingests a foreign dashboard config — Homepage services.yml,
+// Homarr JSON export, or Dashy conf.yml — and replaces the board with it.
+// Format is sniffed from the body; settings are left untouched.
+func (s *Server) importExternal(c *gin.Context) {
+	body, err := io.ReadAll(io.LimitReader(c.Request.Body, 8<<20))
+	if err != nil || len(body) == 0 {
+		fail(c, http.StatusBadRequest, "empty or unreadable body")
+		return
+	}
+	sections, err := parseExternal(body)
+	if err != nil {
+		fail(c, http.StatusBadRequest, err.Error())
+		return
+	}
+	if err := s.replaceBoard(sections, nil); err != nil {
+		failImport(c, err)
+		return
+	}
+	board, err := s.board()
+	if err != nil {
+		fail(c, http.StatusInternalServerError, err.Error())
+		return
+	}
+	c.JSON(http.StatusOK, board)
+}
+
+// parseExternal sniffs the config format: JSON decodes as Homarr; a YAML
+// sequence is Homepage's grouped services list; a YAML mapping carrying
+// `sections` is a Dashy conf.yml.
+func parseExternal(body []byte) ([]Section, error) {
+	var j any
+	if json.Unmarshal(body, &j) == nil {
+		return parseHomarr(j)
+	}
+	var y any
+	if err := yaml.Unmarshal(body, &y); err != nil {
+		return nil, errors.New("unreadable file — expected JSON or YAML")
+	}
+	switch root := y.(type) {
+	case []any:
+		return parseHomepage(root)
+	case map[string]any:
+		if _, ok := root["sections"]; ok {
+			return parseDashy(body)
+		}
+	}
+	return nil, errors.New("unrecognized config — expected a Homepage services.yml, Homarr JSON export, or Dashy conf.yml")
+}
+
+// ---------- Homepage ----------
+
+// parseHomepage walks a services.yml: a sequence of single-key maps
+// (group name -> sequence of single-key service maps). Bare single-key
+// entries at the top level land in an "Imported" section.
+func parseHomepage(groups []any) ([]Section, error) {
+	var secs []Section
+	loose := Section{Name: "Imported"}
+	for _, g := range groups {
+		gm, ok := g.(map[string]any)
+		if !ok {
+			continue
+		}
+		for name, v := range gm {
+			switch val := v.(type) {
+			case []any:
+				sec := Section{Name: name, Items: homepageItems(val)}
+				if len(sec.Items) > 0 {
+					secs = append(secs, sec)
+				}
+			case map[string]any:
+				if it, ok := homepageService(name, val); ok {
+					loose.Items = append(loose.Items, it)
+				}
+			}
+		}
+	}
+	if len(loose.Items) > 0 {
+		secs = append([]Section{loose}, secs...)
+	}
+	if len(secs) == 0 {
+		return nil, errors.New("homepage: no importable services found")
+	}
+	return assignIDs(secs), nil
+}
+
+func homepageItems(list []any) []Item {
+	var items []Item
+	for _, raw := range list {
+		m, ok := raw.(map[string]any)
+		if !ok {
+			continue
+		}
+		for name, fields := range m {
+			fm, _ := fields.(map[string]any)
+			if it, ok := homepageService(name, fm); ok {
+				items = append(items, it)
+			}
+		}
+	}
+	return items
+}
+
+// homepageService maps one service entry. Entries without a reachable URL
+// (pure widget config, bare ping targets) are skipped rather than failing
+// the whole import.
+func homepageService(name string, fields map[string]any) (Item, bool) {
+	u := strOf(fields, "href", "siteMonitor", "ping")
+	if strings.TrimSpace(name) == "" || !validURL(u) {
+		return Item{}, false
+	}
+	return importedItem(name, resolveIcon(strOf(fields, "icon"), u), u), true
+}
+
+// ---------- Homarr ----------
+
+// parseHomarr tolerates Homarr's shifting export shapes: `categories[].apps`,
+// a flat `apps` array grouped by category id, or board `sections[].items`.
+func parseHomarr(root any) ([]Section, error) {
+	m, ok := root.(map[string]any)
+	if !ok {
+		return nil, errors.New("homarr: expected a JSON object")
+	}
+	var secs []Section
+	seen := map[string]bool{}
+	catNames := map[string]string{}
+
+	for _, c := range arrOf(m["categories"]) {
+		cm, _ := c.(map[string]any)
+		if name := strOf(cm, "name"); name != "" {
+			catNames[strOf(cm, "id")] = name
+			if s := sectionFromApps(name, arrOf(cm["apps"]), seen); len(s.Items) > 0 {
+				secs = append(secs, s)
+			}
+		}
+	}
+
+	if apps := arrOf(m["apps"]); len(apps) > 0 {
+		var order []string
+		byCat := map[string][]any{}
+		for _, a := range apps {
+			am, _ := a.(map[string]any)
+			cat := strOf(am, "categoryId", "category")
+			if _, ok := byCat[cat]; !ok {
+				order = append(order, cat)
+			}
+			byCat[cat] = append(byCat[cat], a)
+		}
+		for _, cat := range order {
+			name := catNames[cat]
+			if name == "" {
+				name = "Imported"
+			}
+			if s := sectionFromApps(name, byCat[cat], seen); len(s.Items) > 0 {
+				secs = append(secs, s)
+			}
+		}
+	}
+
+	for _, raw := range arrOf(m["sections"]) {
+		sm, _ := raw.(map[string]any)
+		if s := sectionFromApps(strOf(sm, "name"), arrOf(sm["items"]), seen); len(s.Items) > 0 {
+			secs = append(secs, s)
+		}
+	}
+
+	if len(secs) == 0 {
+		return nil, errors.New("homarr: no apps found")
+	}
+	return assignIDs(secs), nil
+}
+
+func sectionFromApps(name string, apps []any, seen map[string]bool) Section {
+	sec := Section{Name: orDefault(name, "Imported")}
+	for _, a := range apps {
+		am, _ := a.(map[string]any)
+		it, ok := homarrItem(am)
+		if !ok || seen[it.Name+"|"+it.URLs[0].URL] {
+			continue
+		}
+		seen[it.Name+"|"+it.URLs[0].URL] = true
+		sec.Items = append(sec.Items, it)
+	}
+	return sec
+}
+
+func homarrItem(m map[string]any) (Item, bool) {
+	name := strOf(m, "name", "title", "label")
+	u := strOf(m, "url", "href", "appUrl", "externalUrl", "internalUrl")
+	if name == "" || !validURL(u) {
+		return Item{}, false
+	}
+	return importedItem(name, resolveIcon(strOf(m, "icon", "iconUrl"), u), u), true
+}
+
+// ---------- Dashy ----------
+
+type dashyConf struct {
+	Sections []struct {
+		Name  string `yaml:"name"`
+		Items []struct {
+			Title string `yaml:"title"`
+			URL   string `yaml:"url"`
+			Icon  string `yaml:"icon"`
+		} `yaml:"items"`
+	} `yaml:"sections"`
+}
+
+func parseDashy(body []byte) ([]Section, error) {
+	var conf dashyConf
+	if err := yaml.Unmarshal(body, &conf); err != nil {
+		return nil, fmt.Errorf("dashy: malformed conf.yml")
+	}
+	var secs []Section
+	for _, ds := range conf.Sections {
+		sec := Section{Name: orDefault(ds.Name, "Imported")}
+		for _, di := range ds.Items {
+			if di.Title == "" || !validURL(di.URL) {
+				continue
+			}
+			sec.Items = append(sec.Items, importedItem(di.Title, resolveIcon(di.Icon, di.URL), di.URL))
+		}
+		secs = append(secs, sec)
+	}
+	if len(secs) == 0 {
+		return nil, errors.New("dashy: no sections found")
+	}
+	return assignIDs(secs), nil
+}
+
+// ---------- shared ----------
+
+// assignIDs stamps fresh ids and 1024-spaced positions on an imported tree.
+func assignIDs(secs []Section) []Section {
+	for si := range secs {
+		secs[si].ID = newID("s")
+		secs[si].Position = float64(si+1) * 1024
+		for ii := range secs[si].Items {
+			it := &secs[si].Items[ii]
+			it.ID = newID("i")
+			it.SectionID = secs[si].ID
+			it.Kind = orDefault(it.Kind, "service")
+			it.Position = float64(ii+1) * 1024
+			for ui := range it.URLs {
+				it.URLs[ui].ID = newID("u")
+				it.URLs[ui].Position = float64(ui+1) * 1024
+			}
+		}
+	}
+	return secs
+}
+
+func importedItem(name, icon, u string) Item {
+	return Item{Kind: "service", Name: name, Icon: icon, URLs: []URL{{URL: u}}}
+}
+
+// resolveIcon maps a foreign icon reference to a usable URL: passthrough for
+// absolute URLs, favicon derivation for Dashy's `favicon`, the dashboard-icons
+// CDN for prefixed or bare slugs, and "" (letter tile) for local file paths
+// that only existed on the old dashboard.
+func resolveIcon(icon, itemURL string) string {
+	icon = strings.TrimSpace(icon)
+	switch {
+	case icon == "":
+		return ""
+	case strings.HasPrefix(icon, "http://"), strings.HasPrefix(icon, "https://"):
+		return icon
+	case icon == "favicon", icon == "generalfavicon":
+		return faviconOf(itemURL)
+	case strings.ContainsAny(icon, "/.\\"):
+		return ""
+	}
+	lower := strings.ToLower(icon)
+	for _, p := range []string{"si-", "sh-", "hl-", "di-", "mdi-"} {
+		if rest, ok := strings.CutPrefix(lower, p); ok {
+			if rest == "" {
+				return ""
+			}
+			return diBase + "/" + rest + ".png"
+		}
+	}
+	return diBase + "/" + lower + ".png"
+}
+
+func faviconOf(raw string) string {
+	u, err := url.Parse(raw)
+	if err != nil || u.Host == "" {
+		return ""
+	}
+	return u.Scheme + "://" + u.Host + "/favicon.ico"
+}
+
+func arrOf(v any) []any {
+	a, _ := v.([]any)
+	return a
+}
+
+func strOf(m map[string]any, keys ...string) string {
+	for _, k := range keys {
+		if s, ok := m[k].(string); ok && s != "" {
+			return s
+		}
+	}
+	return ""
+}

apps/backend/internal/api/monitors.go

@@ -0,0 +1,549 @@
+package api
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"strconv"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/tdvorak/dash/internal/monitor"
+	"github.com/tdvorak/dash/internal/widget"
+	"go.uber.org/zap"
+)
+
+// ---------- model ----------
+
+const monitorCols = `id, name, type, url, hostname, port, method, headers, body,
+	keyword, keyword_invert, json_query, expected, dns_type, interval_s, timeout_s,
+	retries, active, status, push_token, tags, notes, position, last_check, created_at`
+
+func scanMonitor(row interface{ Scan(...any) error }) (*monitor.Monitor, error) {
+	var m monitor.Monitor
+	var tags string
+	var invert, active int
+	err := row.Scan(&m.ID, &m.Name, &m.Type, &m.URL, &m.Hostname, &m.Port, &m.Method,
+		&m.Headers, &m.Body, &m.Keyword, &invert, &m.JSONQuery, &m.Expected, &m.DNSType,
+		&m.IntervalS, &m.TimeoutS, &m.Retries, &active, &m.Status, &m.PushToken,
+		&tags, &m.Notes, &m.Position, &m.LastCheck, &m.CreatedAt)
+	if err != nil {
+		return nil, err
+	}
+	m.KeywordInvert = invert != 0
+	m.Active = active != 0
+	_ = json.Unmarshal([]byte(tags), &m.Tags)
+	if m.Tags == nil {
+		m.Tags = []string{}
+	}
+	return &m, nil
+}
+
+func (s *Server) loadMonitor(id string) (*monitor.Monitor, error) {
+	row := s.db.QueryRow(`SELECT `+monitorCols+` FROM monitors WHERE id = ?`, id)
+	return scanMonitor(row)
+}
+
+func (s *Server) loadMonitorByToken(token string) (*monitor.Monitor, error) {
+	row := s.db.QueryRow(`SELECT `+monitorCols+` FROM monitors WHERE push_token = ? AND push_token != ''`, token)
+	return scanMonitor(row)
+}
+
+func (s *Server) listMonitors() ([]monitor.Monitor, error) {
+	rows, err := s.db.Query(`SELECT ` + monitorCols + ` FROM monitors ORDER BY position, name`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []monitor.Monitor
+	for rows.Next() {
+		m, err := scanMonitor(rows)
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, *m)
+	}
+	return out, rows.Err()
+}
+
+// ---------- uptime stats ----------
+
+type uptimeStats struct {
+	Up         int     `json:"up"`
+	Down       int     `json:"down"`
+	Uptime24h  float64 `json:"uptime24h"`
+	Uptime30d  float64 `json:"uptime30d"`
+	AvgPing24h int     `json:"avgPing24h"`
+}
+
+func (s *Server) monitorStats(id string) uptimeStats {
+	var st uptimeStats
+	pct := func(hours int) float64 {
+		var up, down int
+		_ = s.db.QueryRow(`SELECT COALESCE(SUM(status='up'),0), COALESCE(SUM(status='down'),0)
+			FROM heartbeats WHERE monitor_id = ? AND checked_at >= datetime('now', ?)`,
+			id, "-"+strconv.Itoa(hours)+" hours").Scan(&up, &down)
+		if up+down == 0 {
+			return 100
+		}
+		return float64(up) / float64(up+down) * 100
+	}
+	st.Uptime24h = pct(24)
+	st.Uptime30d = pct(720)
+	_ = s.db.QueryRow(`SELECT COALESCE(AVG(NULLIF(ping_ms,0)),0) FROM heartbeats
+		WHERE monitor_id = ? AND checked_at >= datetime('now','-24 hours')`, id).Scan(&st.AvgPing24h)
+	_ = s.db.QueryRow(`SELECT COALESCE(SUM(status='up'),0), COALESCE(SUM(status='down'),0)
+		FROM heartbeats WHERE monitor_id = ?`, id).Scan(&st.Up, &st.Down)
+	return st
+}
+
+// monitorView is the API shape: the row plus live uptime stats.
+type monitorView struct {
+	*monitor.Monitor
+	Stats uptimeStats `json:"stats"`
+}
+
+// ---------- handlers ----------
+
+func (s *Server) listMonitorsH(c *gin.Context) {
+	ms, err := s.listMonitors()
+	if err != nil {
+		fail(c, http.StatusInternalServerError, err.Error())
+		return
+	}
+	out := make([]monitorView, 0, len(ms))
+	for i := range ms {
+		out = append(out, monitorView{Monitor: &ms[i], Stats: s.monitorStats(ms[i].ID)})
+	}
+	c.JSON(http.StatusOK, out)
+}
+
+// monitorInput is the create/update payload — all fields optional on PATCH.
+type monitorInput struct {
+	Name          *string  `json:"name"`
+	Type          *string  `json:"type"`
+	URL           *string  `json:"url"`
+	Hostname      *string  `json:"hostname"`
+	Port          *int     `json:"port"`
+	Method        *string  `json:"method"`
+	Headers       *string  `json:"headers"`
+	Body          *string  `json:"body"`
+	Keyword       *string  `json:"keyword"`
+	KeywordInvert *bool    `json:"keywordInvert"`
+	JSONQuery     *string  `json:"jsonQuery"`
+	Expected      *string  `json:"expected"`
+	DNSType       *string  `json:"dnsType"`
+	IntervalS     *int     `json:"intervalS"`
+	TimeoutS      *int     `json:"timeoutS"`
+	Retries       *int     `json:"retries"`
+	Active        *bool    `json:"active"`
+	Tags          []string `json:"tags"`
+	Notes         *string  `json:"notes"`
+}
+
+func validMonitorType(t string) bool {
+	for _, v := range monitor.Types() {
+		if v == t {
+			return true
+		}
+	}
+	return false
+}
+
+func strOr(p *string) string {
+	if p == nil {
+		return ""
+	}
+	return *p
+}
+
+func strOr2(p *string, def string) string {
+	if p == nil || *p == "" {
+		return def
+	}
+	return *p
+}
+
+func intOr(p *int) int {
+	if p == nil {
+		return 0
+	}
+	return *p
+}
+
+func intOr2(p *int, def int) int {
+	if p == nil || *p <= 0 {
+		return def
+	}
+	return *p
+}
+
+func boolOr(p *bool) bool { return p != nil && *p }
+
+func boolOr2(p *bool, def bool) bool {
+	if p == nil {
+		return def
+	}
+	return *p
+}
+
+func (s *Server) createMonitor(c *gin.Context) {
+	var in monitorInput
+	if err := c.ShouldBindJSON(&in); err != nil || in.Name == nil || in.Type == nil {
+		fail(c, http.StatusBadRequest, "name and type required")
+		return
+	}
+	if !validMonitorType(*in.Type) {
+		fail(c, http.StatusBadRequest, "invalid type")
+		return
+	}
+	id := newID("m")
+	token := ""
+	if *in.Type == "push" {
+		token = newID("push")
+	}
+	tags, _ := json.Marshal(in.Tags)
+	if in.Tags == nil {
+		tags = []byte("[]")
+	}
+	_, err := s.db.Exec(`INSERT INTO monitors
+		(id, name, type, url, hostname, port, method, headers, body, keyword,
+		 keyword_invert, json_query, expected, dns_type, interval_s, timeout_s,
+		 retries, active, push_token, tags, notes, position)
+		VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)`,
+		id, *in.Name, *in.Type, strOr(in.URL), strOr(in.Hostname), intOr(in.Port),
+		strOr2(in.Method, "GET"), strOr2(in.Headers, "{}"), strOr(in.Body),
+		strOr(in.Keyword), boolOr(in.KeywordInvert), strOr(in.JSONQuery),
+		strOr(in.Expected), strOr2(in.DNSType, "A"), intOr2(in.IntervalS, 60),
+		intOr2(in.TimeoutS, 10), intOr(in.Retries), boolOr2(in.Active, true),
+		token, string(tags), strOr(in.Notes), float64(time.Now().UnixNano())/1e9)
+	if err != nil {
+		fail(c, http.StatusInternalServerError, err.Error())
+		return
+	}
+	m, err := s.loadMonitor(id)
+	if err != nil {
+		fail(c, http.StatusInternalServerError, err.Error())
+		return
+	}
+	c.JSON(http.StatusCreated, monitorView{Monitor: m, Stats: s.monitorStats(id)})
+}
+
+func (s *Server) getMonitor(c *gin.Context) {
+	m, err := s.loadMonitor(c.Param("id"))
+	if notFound(err) {
+		fail(c, http.StatusNotFound, "monitor not found")
+		return
+	}
+	if err != nil {
+		fail(c, http.StatusInternalServerError, err.Error())
+		return
+	}
+	c.JSON(http.StatusOK, monitorView{Monitor: m, Stats: s.monitorStats(m.ID)})
+}
+
+// patchMonitor applies a sparse update; `active` flips pause/resume.
+func (s *Server) patchMonitor(c *gin.Context) {
+	id := c.Param("id")
+	if _, err := s.loadMonitor(id); notFound(err) {
+		fail(c, http.StatusNotFound, "monitor not found")
+		return
+	}
+	var in monitorInput
+	if err := c.ShouldBindJSON(&in); err != nil {
+		fail(c, http.StatusBadRequest, "invalid body")
+		return
+	}
+	if in.Type != nil && !validMonitorType(*in.Type) {
+		fail(c, http.StatusBadRequest, "invalid type")
+		return
+	}
+	setStr := func(col string, p *string) {
+		if p != nil {
+			_, _ = s.db.Exec(`UPDATE monitors SET `+col+` = ? WHERE id = ?`, *p, id)
+		}
+	}
+	setStr("name", in.Name)
+	setStr("type", in.Type)
+	setStr("url", in.URL)
+	setStr("hostname", in.Hostname)
+	setStr("method", in.Method)
+	setStr("headers", in.Headers)
+	setStr("body", in.Body)
+	setStr("keyword", in.Keyword)
+	setStr("json_query", in.JSONQuery)
+	setStr("expected", in.Expected)
+	setStr("dns_type", in.DNSType)
+	setStr("notes", in.Notes)
+	setInt := func(col string, p *int) {
+		if p != nil {
+			_, _ = s.db.Exec(`UPDATE monitors SET `+col+` = ? WHERE id = ?`, *p, id)
+		}
+	}
+	setInt("port", in.Port)
+	setInt("interval_s", in.IntervalS)
+	setInt("timeout_s", in.TimeoutS)
+	setInt("retries", in.Retries)
+	if in.KeywordInvert != nil {
+		_, _ = s.db.Exec(`UPDATE monitors SET keyword_invert = ? WHERE id = ?`, *in.KeywordInvert, id)
+	}
+	if in.Tags != nil {
+		tags, _ := json.Marshal(in.Tags)
+		_, _ = s.db.Exec(`UPDATE monitors SET tags = ? WHERE id = ?`, string(tags), id)
+	}
+	if in.Active != nil {
+		// pause/resume flips the stored status back to pending for a fresh probe
+		status := "pending"
+		if !*in.Active {
+			status = "paused"
+		}
+		_, _ = s.db.Exec(`UPDATE monitors SET active = ?, status = ? WHERE id = ?`, *in.Active, status, id)
+	}
+	m, err := s.loadMonitor(id)
+	if err != nil {
+		fail(c, http.StatusInternalServerError, err.Error())
+		return
+	}
+	c.JSON(http.StatusOK, monitorView{Monitor: m, Stats: s.monitorStats(id)})
+}
+
+func (s *Server) deleteMonitor(c *gin.Context) {
+	res, err := s.db.Exec(`DELETE FROM monitors WHERE id = ?`, c.Param("id"))
+	if err != nil {
+		fail(c, http.StatusInternalServerError, err.Error())
+		return
+	}
+	if n, _ := res.RowsAffected(); n == 0 {
+		fail(c, http.StatusNotFound, "monitor not found")
+		return
+	}
+	c.Status(http.StatusNoContent)
+}
+
+// heartbeats returns the recent check history for charts/logs.
+func (s *Server) monitorHeartbeats(c *gin.Context) {
+	hours, _ := strconv.Atoi(c.DefaultQuery("hours", "24"))
+	if hours <= 0 || hours > 24*30 {
+		hours = 24
+	}
+	rows, err := s.db.Query(`SELECT id, status, ping_ms, msg, cert_expiry, checked_at
+		FROM heartbeats WHERE monitor_id = ? AND checked_at >= datetime('now', ?)
+		ORDER BY checked_at`, c.Param("id"), "-"+strconv.Itoa(hours)+" hours")
+	if err != nil {
+		fail(c, http.StatusInternalServerError, err.Error())
+		return
+	}
+	defer rows.Close()
+	type hb struct {
+		ID         int    `json:"id"`
+		Status     string `json:"status"`
+		PingMs     int    `json:"pingMs"`
+		Msg        string `json:"msg"`
+		CertExpiry int    `json:"certExpiry"`
+		CheckedAt  string `json:"checkedAt"`
+	}
+	out := []hb{}
+	for rows.Next() {
+		var h hb
+		if err := rows.Scan(&h.ID, &h.Status, &h.PingMs, &h.Msg, &h.CertExpiry, &h.CheckedAt); err != nil {
+			fail(c, http.StatusInternalServerError, err.Error())
+			return
+		}
+		out = append(out, h)
+	}
+	c.JSON(http.StatusOK, out)
+}
+
+// checkNow runs one check synchronously and returns the refreshed view.
+func (s *Server) checkNow(c *gin.Context) {
+	m, err := s.loadMonitor(c.Param("id"))
+	if notFound(err) {
+		fail(c, http.StatusNotFound, "monitor not found")
+		return
+	}
+	if err != nil {
+		fail(c, http.StatusInternalServerError, err.Error())
+		return
+	}
+	s.runCheck(m)
+	m, err = s.loadMonitor(m.ID)
+	if err != nil {
+		fail(c, http.StatusInternalServerError, err.Error())
+		return
+	}
+	c.JSON(http.StatusOK, monitorView{Monitor: m, Stats: s.monitorStats(m.ID)})
+}
+
+// pushIngest is the push-monitor endpoint: any hit records an up heartbeat.
+// ?msg= and ?ping= are optional annotations.
+func (s *Server) pushIngest(c *gin.Context) {
+	m, err := s.loadMonitorByToken(c.Param("token"))
+	if err != nil {
+		fail(c, http.StatusNotFound, "unknown push token")
+		return
+	}
+	msg := c.Query("msg")
+	ping, _ := strconv.Atoi(c.Query("ping"))
+	s.writeHeartbeat(m, &monitor.Result{Up: true, PingMs: ping, Msg: msg, CertExpiry: -1})
+	_, _ = s.db.Exec(`UPDATE monitors SET status = 'up', last_check = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?`, m.ID)
+	c.JSON(http.StatusOK, gin.H{"status": "ok"})
+}
+
+// ---------- scheduler ----------
+
+// runScheduler sweeps for due monitors every tick; each check runs in a
+// bounded worker. Push monitors go stale -> down when silent too long.
+func (s *Server) runScheduler(done <-chan struct{}) {
+	tick := time.NewTicker(10 * time.Second)
+	prune := time.NewTicker(time.Hour)
+	defer tick.Stop()
+	defer prune.Stop()
+	for {
+		select {
+		case <-done:
+			return
+		case <-tick.C:
+			s.sweep()
+		case <-prune.C:
+			if _, err := s.db.Exec(`DELETE FROM heartbeats WHERE checked_at < datetime('now','-30 days')`); err != nil {
+				s.log.Error("heartbeat prune", zap.Error(err))
+			}
+		}
+	}
+}
+
+var checkSem = make(chan struct{}, 8)
+
+func (s *Server) sweep() {
+	rows, err := s.db.Query(`SELECT ` + monitorCols + ` FROM monitors
+		WHERE active = 1 AND type != 'push'
+		AND (last_check IS NULL OR datetime(last_check, '+' || interval_s || ' seconds') <= datetime('now'))`)
+	if err != nil {
+		s.log.Error("monitor sweep", zap.Error(err))
+		return
+	}
+	var due []monitor.Monitor
+	for rows.Next() {
+		if m, err := scanMonitor(rows); err == nil {
+			due = append(due, *m)
+		}
+	}
+	rows.Close()
+
+	for i := range due {
+		m := &due[i]
+		checkSem <- struct{}{}
+		go func() {
+			defer func() { <-checkSem }()
+			s.runCheck(m)
+		}()
+	}
+
+	// Push monitors: mark down when no push arrived within 2x interval.
+	if _, err := s.db.Exec(`UPDATE monitors SET status = 'down',
+		last_check = strftime('%Y-%m-%dT%H:%M:%fZ','now')
+		WHERE type = 'push' AND active = 1
+		AND last_check IS NOT NULL
+		AND datetime(last_check, '+' || (2 * interval_s) || ' seconds') <= datetime('now')
+		AND status != 'down'`); err != nil {
+		s.log.Error("push stale sweep", zap.Error(err))
+	}
+}
+
+// runCheck executes one monitor check (with retries) and persists the result.
+func (s *Server) runCheck(m *monitor.Monitor) *monitor.Result {
+	var res *monitor.Result
+	for attempt := 0; attempt <= m.Retries; attempt++ {
+		res = monitor.Check(context.Background(), m)
+		if res.Up || attempt == m.Retries {
+			break
+		}
+		time.Sleep(2 * time.Second)
+	}
+	s.writeHeartbeat(m, res)
+	prev := m.Status
+	next := "down"
+	if res.Up {
+		next = "up"
+	}
+	if _, err := s.db.Exec(`UPDATE monitors SET status = ?, last_check = strftime('%Y-%m-%dT%H:%M:%fZ','now') WHERE id = ?`,
+		next, m.ID); err != nil {
+		s.log.Error("monitor update", zap.Error(err))
+	}
+	if prev != next && prev != "pending" {
+		s.onMonitorTransition(m, prev, next)
+	}
+	return res
+}
+
+func (s *Server) writeHeartbeat(m *monitor.Monitor, res *monitor.Result) {
+	status := "down"
+	if res.Up {
+		status = "up"
+	}
+	if _, err := s.db.Exec(`INSERT INTO heartbeats (monitor_id, status, ping_ms, msg, cert_expiry)
+		VALUES (?,?,?,?,?)`, m.ID, status, res.PingMs, truncate(res.Msg, 300), res.CertExpiry); err != nil {
+		s.log.Error("heartbeat write", zap.Error(err))
+	}
+}
+
+// onMonitorTransition is the alert seam — M2 wires notifications here.
+func (s *Server) onMonitorTransition(m *monitor.Monitor, prev, next string) {
+	s.log.Info("monitor transition",
+		zap.String("monitor", m.Name), zap.String("from", prev), zap.String("to", next))
+}
+
+func truncate(s string, n int) string {
+	if len(s) > n {
+		return s[:n]
+	}
+	return s
+}
+
+// ---------- widget fetcher ----------
+
+// monitorWidget serves board tiles bound to a monitor via config.monitorId.
+type monitorWidget struct{ db *sql.DB }
+
+func (w *monitorWidget) Meta() widget.Type {
+	return widget.Type{
+		Type: "monitor", Name: "Monitor",
+		Description: "Live status of an uptime monitor",
+		Fields: []widget.Field{
+			{Key: "monitorId", Label: "Monitor", Required: true},
+		},
+	}
+}
+
+func (w *monitorWidget) Fetch(_ context.Context, cfg json.RawMessage) (any, error) {
+	var c struct {
+		MonitorID string `json:"monitorId"`
+	}
+	if err := json.Unmarshal(cfg, &c); err != nil || c.MonitorID == "" {
+		return nil, errors.New("config.monitorId required")
+	}
+	row := w.db.QueryRow(`SELECT `+monitorCols+` FROM monitors WHERE id = ?`, c.MonitorID)
+	m, err := scanMonitor(row)
+	if err != nil {
+		return nil, errors.New("monitor not found")
+	}
+	var up, down int
+	var avgPing float64
+	_ = w.db.QueryRow(`SELECT COALESCE(SUM(status='up'),0), COALESCE(SUM(status='down'),0),
+		COALESCE(AVG(NULLIF(ping_ms,0)),0)
+		FROM heartbeats WHERE monitor_id = ? AND checked_at >= datetime('now','-24 hours')`,
+		m.ID).Scan(&up, &down, &avgPing)
+	uptime := 100.0
+	if up+down > 0 {
+		uptime = float64(up) / float64(up+down) * 100
+	}
+	return map[string]any{
+		"name":     m.Name,
+		"status":   m.Status,
+		"uptime24": uptime,
+		"ping":     int(avgPing),
+		"type":     m.Type,
+	}, nil
+}

apps/backend/internal/api/transfer.go

@@ -2,11 +2,26 @@ package api
 
 import (
 	"encoding/json"
+	"errors"
+	"fmt"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
 )
 
+// errBadInput marks payload validation failures so import handlers can map
+// them to 400 while genuine DB failures stay 500.
+var errBadInput = errors.New("invalid import payload")
+
+// failImport maps replaceBoard errors: bad input -> 400, the rest -> 500.
+func failImport(c *gin.Context, err error) {
+	if errors.Is(err, errBadInput) {
+		fail(c, http.StatusBadRequest, err.Error())
+		return
+	}
+	fail(c, http.StatusInternalServerError, err.Error())
+}
+
 // Export is the portable backup shape: version + settings + board tree.
 type Export struct {
 	Version  int                        `json:"version"`
@@ -36,75 +51,10 @@ func (s *Server) importBoard(c *gin.Context) {
 		fail(c, http.StatusBadRequest, "invalid export payload")
 		return
 	}
-
+	if err := s.replaceBoard(in.Sections, in.Settings); err != nil {
-	tx, err := s.db.Begin()
+		failImport(c, err)
-	if err != nil {
-		fail(c, http.StatusInternalServerError, err.Error())
 		return
 	}
-	defer func() { _ = tx.Rollback() }()
-
-	for _, q := range []string{`DELETE FROM urls`, `DELETE FROM items`, `DELETE FROM sections`} {
-		if _, err := tx.Exec(q); err != nil {
-			fail(c, http.StatusInternalServerError, err.Error())
-			return
-		}
-	}
-	for _, sec := range in.Sections {
-		if sec.ID == "" || sec.Name == "" {
-			fail(c, http.StatusBadRequest, "section missing id or name")
-			return
-		}
-		if _, err := tx.Exec(`INSERT INTO sections (id, name, position, collapsed) VALUES (?, ?, ?, ?)`,
-			sec.ID, sec.Name, sec.Position, sec.Collapsed); err != nil {
-			fail(c, http.StatusInternalServerError, err.Error())
-			return
-		}
-		for _, it := range sec.Items {
-			if it.ID == "" || it.Name == "" {
-				fail(c, http.StatusBadRequest, "item missing id or name")
-				return
-			}
-			var cfg any
-			if it.Config != nil {
-				cfg = string(*it.Config)
-			}
-			if _, err := tx.Exec(
-				`INSERT INTO items (id, section_id, kind, name, icon, position, config) VALUES (?, ?, ?, ?, ?, ?, ?)`,
-				it.ID, sec.ID, orDefault(it.Kind, "service"), it.Name, it.Icon, it.Position, cfg); err != nil {
-				fail(c, http.StatusInternalServerError, err.Error())
-				return
-			}
-			for _, u := range it.URLs {
-				if !validURL(u.URL) {
-					fail(c, http.StatusBadRequest, "invalid url: "+u.URL)
-					return
-				}
-				uid := u.ID
-				if uid == "" {
-					uid = newID("u")
-				}
-				if _, err := tx.Exec(`INSERT INTO urls (id, item_id, url, label, position) VALUES (?, ?, ?, ?, ?)`,
-					uid, it.ID, u.URL, u.Label, u.Position); err != nil {
-					fail(c, http.StatusInternalServerError, err.Error())
-					return
-				}
-			}
-		}
-	}
-	for k, v := range in.Settings {
-		if _, err := tx.Exec(
-			`INSERT INTO settings (key, value) VALUES (?, ?)
-			 ON CONFLICT(key) DO UPDATE SET value = excluded.value`, k, string(v)); err != nil {
-			fail(c, http.StatusInternalServerError, err.Error())
-			return
-		}
-	}
-	if err := tx.Commit(); err != nil {
-		fail(c, http.StatusInternalServerError, err.Error())
-		return
-	}
-
 	sections, err := s.board()
 	if err != nil {
 		fail(c, http.StatusInternalServerError, err.Error())
@@ -113,6 +63,66 @@ func (s *Server) importBoard(c *gin.Context) {
 	c.JSON(http.StatusOK, sections)
 }
 
+// replaceBoard swaps all board rows inside one transaction — shared by the
+// Dash export import and the external-config importers.
+func (s *Server) replaceBoard(sections []Section, settings map[string]json.RawMessage) error {
+	tx, err := s.db.Begin()
+	if err != nil {
+		return err
+	}
+	defer func() { _ = tx.Rollback() }()
+
+	for _, q := range []string{`DELETE FROM urls`, `DELETE FROM items`, `DELETE FROM sections`} {
+		if _, err := tx.Exec(q); err != nil {
+			return err
+		}
+	}
+	for _, sec := range sections {
+		if sec.ID == "" || sec.Name == "" {
+			return fmt.Errorf("%w: section missing id or name", errBadInput)
+		}
+		if _, err := tx.Exec(`INSERT INTO sections (id, name, position, collapsed) VALUES (?, ?, ?, ?)`,
+			sec.ID, sec.Name, sec.Position, sec.Collapsed); err != nil {
+			return err
+		}
+		for _, it := range sec.Items {
+			if it.ID == "" || it.Name == "" {
+				return fmt.Errorf("%w: item missing id or name", errBadInput)
+			}
+			var cfg any
+			if it.Config != nil {
+				cfg = string(*it.Config)
+			}
+			if _, err := tx.Exec(
+				`INSERT INTO items (id, section_id, kind, name, icon, position, config) VALUES (?, ?, ?, ?, ?, ?, ?)`,
+				it.ID, sec.ID, orDefault(it.Kind, "service"), it.Name, it.Icon, it.Position, cfg); err != nil {
+				return err
+			}
+			for _, u := range it.URLs {
+				if !validURL(u.URL) {
+					return fmt.Errorf("%w: invalid url: %s", errBadInput, u.URL)
+				}
+				uid := u.ID
+				if uid == "" {
+					uid = newID("u")
+				}
+				if _, err := tx.Exec(`INSERT INTO urls (id, item_id, url, label, position) VALUES (?, ?, ?, ?, ?)`,
+					uid, it.ID, u.URL, u.Label, u.Position); err != nil {
+					return err
+				}
+			}
+		}
+	}
+	for k, v := range settings {
+		if _, err := tx.Exec(
+			`INSERT INTO settings (key, value) VALUES (?, ?)
+			 ON CONFLICT(key) DO UPDATE SET value = excluded.value`, k, string(v)); err != nil {
+			return err
+		}
+	}
+	return tx.Commit()
+}
+
 func orDefault(v, def string) string {
 	if v == "" {
 		return def

apps/backend/internal/db/migrations/0003_monitors.sql

@@ -0,0 +1,45 @@
+-- +goose Up
+-- Uptime monitors and their check history (merge phase M1).
+CREATE TABLE monitors (
+    id             TEXT PRIMARY KEY,
+    name           TEXT NOT NULL,
+    type           TEXT NOT NULL CHECK (type IN ('http','tcp','ping','dns','keyword','json','push')),
+    url            TEXT NOT NULL DEFAULT '',
+    hostname       TEXT NOT NULL DEFAULT '',
+    port           INTEGER NOT NULL DEFAULT 0,
+    method         TEXT NOT NULL DEFAULT 'GET',
+    headers        JSON NOT NULL DEFAULT '{}',
+    body           TEXT NOT NULL DEFAULT '',
+    keyword        TEXT NOT NULL DEFAULT '',
+    keyword_invert INTEGER NOT NULL DEFAULT 0,
+    json_query     TEXT NOT NULL DEFAULT '',
+    expected       TEXT NOT NULL DEFAULT '',
+    dns_type       TEXT NOT NULL DEFAULT 'A',
+    interval_s     INTEGER NOT NULL DEFAULT 60,
+    timeout_s      INTEGER NOT NULL DEFAULT 10,
+    retries        INTEGER NOT NULL DEFAULT 0,
+    active         INTEGER NOT NULL DEFAULT 1,
+    status         TEXT NOT NULL DEFAULT 'pending' CHECK (status IN ('up','down','pending','paused','maintenance')),
+    push_token     TEXT NOT NULL DEFAULT '',
+    tags           JSON NOT NULL DEFAULT '[]',
+    notes          TEXT NOT NULL DEFAULT '',
+    position       REAL NOT NULL DEFAULT 0,
+    last_check     TEXT,
+    created_at     TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
+);
+CREATE INDEX monitors_due ON monitors(active, last_check);
+
+CREATE TABLE heartbeats (
+    id          INTEGER PRIMARY KEY AUTOINCREMENT,
+    monitor_id  TEXT NOT NULL REFERENCES monitors(id) ON DELETE CASCADE,
+    status      TEXT NOT NULL CHECK (status IN ('up','down')),
+    ping_ms     INTEGER NOT NULL DEFAULT 0,
+    msg         TEXT NOT NULL DEFAULT '',
+    cert_expiry INTEGER NOT NULL DEFAULT -1,
+    checked_at  TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now'))
+);
+CREATE INDEX heartbeats_monitor_time ON heartbeats(monitor_id, checked_at);
+
+-- +goose Down
+DROP TABLE heartbeats;
+DROP TABLE monitors;

apps/backend/internal/monitor/monitor.go

@@ -0,0 +1,315 @@
+// Package monitor holds the uptime-check domain: the Monitor model mirroring
+// the monitors table, plus the check implementations the scheduler invokes.
+// No DB access, no HTTP handlers — pure check logic.
+package monitor
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net"
+	"net/http"
+	"strconv"
+	"strings"
+	"time"
+
+	"golang.org/x/net/icmp"
+	"golang.org/x/net/ipv4"
+)
+
+// Monitor mirrors one row of the monitors table.
+type Monitor struct {
+	ID            string    `json:"id"`
+	Name          string    `json:"name"`
+	Type          string    `json:"type"`
+	URL           string    `json:"url"`
+	Hostname      string    `json:"hostname"`
+	Port          int       `json:"port"`
+	Method        string    `json:"method"`
+	Headers       string    `json:"headers"` // JSON object
+	Body          string    `json:"body"`
+	Keyword       string    `json:"keyword"`
+	KeywordInvert bool      `json:"keywordInvert"`
+	JSONQuery     string    `json:"jsonQuery"`
+	Expected      string    `json:"expected"`
+	DNSType       string    `json:"dnsType"`
+	IntervalS     int       `json:"intervalS"`
+	TimeoutS      int       `json:"timeoutS"`
+	Retries       int       `json:"retries"`
+	Active        bool      `json:"active"`
+	Status        string    `json:"status"`
+	PushToken     string    `json:"pushToken,omitempty"`
+	Tags          []string  `json:"tags"`
+	Notes         string    `json:"notes"`
+	Position      float64   `json:"position"`
+	LastCheck     *string   `json:"lastCheck"`
+	CreatedAt     string    `json:"createdAt"`
+}
+
+// Result is the outcome of one check.
+type Result struct {
+	Up         bool
+	PingMs     int
+	Msg        string
+	CertExpiry int // days until TLS cert expiry; -1 when not applicable
+}
+
+// Types lists the check kinds the add-monitor dialog offers.
+func Types() []string {
+	return []string{"http", "tcp", "ping", "dns", "keyword", "json", "push"}
+}
+
+// Check dispatches to the checker for m.Type. Retries happen in the caller.
+func Check(ctx context.Context, m *Monitor) *Result {
+	timeout := time.Duration(m.TimeoutS) * time.Second
+	if timeout <= 0 {
+		timeout = 10 * time.Second
+	}
+	ctx, cancel := context.WithTimeout(ctx, timeout)
+	defer cancel()
+
+	switch m.Type {
+	case "http", "keyword", "json":
+		return checkHTTP(ctx, m)
+	case "tcp":
+		return checkTCP(ctx, m)
+	case "ping":
+		return checkPing(ctx, m)
+	case "dns":
+		return checkDNS(ctx, m)
+	default:
+		return &Result{Msg: "unknown monitor type: " + m.Type}
+	}
+}
+
+func hostOf(m *Monitor) string {
+	if m.Hostname != "" {
+		return m.Hostname
+	}
+	return m.URL
+}
+
+func checkHTTP(ctx context.Context, m *Monitor) *Result {
+	method := m.Method
+	if method == "" {
+		method = http.MethodGet
+	}
+	var body io.Reader
+	if m.Body != "" {
+		body = strings.NewReader(m.Body)
+	}
+	req, err := http.NewRequestWithContext(ctx, method, m.URL, body)
+	if err != nil {
+		return &Result{Msg: "bad url: " + m.URL}
+	}
+	var hdrs map[string]string
+	if json.Unmarshal([]byte(m.Headers), &hdrs) == nil {
+		for k, v := range hdrs {
+			req.Header.Set(k, v)
+		}
+	}
+	if m.Body != "" && req.Header.Get("Content-Type") == "" {
+		req.Header.Set("Content-Type", "application/json")
+	}
+
+	start := time.Now()
+	resp, err := http.DefaultClient.Do(req)
+	ping := int(time.Since(start).Milliseconds())
+	if err != nil {
+		return &Result{Msg: err.Error()}
+	}
+	defer resp.Body.Close()
+
+	res := &Result{PingMs: ping}
+	if resp.TLS != nil && len(resp.TLS.PeerCertificates) > 0 {
+		res.CertExpiry = int(time.Until(resp.TLS.PeerCertificates[0].NotAfter).Hours() / 24)
+	} else {
+		res.CertExpiry = -1
+	}
+
+	switch m.Type {
+	case "keyword", "json":
+		raw, err := io.ReadAll(io.LimitReader(resp.Body, 4<<20))
+		if err != nil {
+			res.Msg = "read body: " + err.Error()
+			return res
+		}
+		if m.Type == "keyword" {
+			found := strings.Contains(string(raw), m.Keyword)
+			if m.KeywordInvert {
+				found = !found
+			}
+			res.Up = found
+			res.Msg = fmt.Sprintf("keyword %q %s", m.Keyword, map[bool]string{true: "found", false: "absent"}[found])
+			return res
+		}
+		return checkJSONBody(res, raw, m)
+	default:
+		res.Up = resp.StatusCode < 400
+		res.Msg = fmt.Sprintf("HTTP %d", resp.StatusCode)
+		return res
+	}
+}
+
+// checkJSONBody walks a dot path ("a.b.0.c") into decoded JSON and compares
+// the leaf to m.Expected.
+func checkJSONBody(res *Result, raw []byte, m *Monitor) *Result {
+	var v any
+	if err := json.Unmarshal(raw, &v); err != nil {
+		res.Msg = "invalid JSON: " + err.Error()
+		return res
+	}
+	for _, key := range strings.Split(m.JSONQuery, ".") {
+		switch n := v.(type) {
+		case map[string]any:
+			v = n[key]
+		case []any:
+			i, err := strconv.Atoi(key)
+			if err != nil || i < 0 || i >= len(n) {
+				res.Msg = "json path missing: " + m.JSONQuery
+				return res
+			}
+			v = n[i]
+		default:
+			res.Msg = "json path missing: " + m.JSONQuery
+			return res
+		}
+	}
+	got := fmt.Sprint(v)
+	res.Up = got == m.Expected
+	res.Msg = fmt.Sprintf("%s = %q (want %q)", m.JSONQuery, got, m.Expected)
+	return res
+}
+
+func checkTCP(ctx context.Context, m *Monitor) *Result {
+	host := hostOf(m)
+	if host == "" {
+		return &Result{Msg: "hostname or url required"}
+	}
+	addr := net.JoinHostPort(host, strconv.Itoa(m.Port))
+	start := time.Now()
+	conn, err := (&net.Dialer{}).DialContext(ctx, "tcp", addr)
+	if err != nil {
+		return &Result{Msg: err.Error()}
+	}
+	_ = conn.Close()
+	return &Result{Up: true, PingMs: int(time.Since(start).Milliseconds()), Msg: "port open"}
+}
+
+// checkPing sends one ICMP echo. Raw sockets need CAP_NET_RAW; the udp4
+// datagram path works unprivileged on Linux via ping_group_range.
+func checkPing(ctx context.Context, m *Monitor) *Result {
+	host := hostOf(m)
+	if host == "" {
+		return &Result{Msg: "hostname required"}
+	}
+	dst, err := net.ResolveIPAddr("ip4", host)
+	if err != nil {
+		if dst, err = net.ResolveIPAddr("ip6", host); err != nil {
+			return &Result{Msg: "resolve: " + err.Error()}
+		}
+	}
+
+	conn, err := icmp.ListenPacket("ip4:icmp", "0.0.0.0")
+	if err != nil {
+		conn, err = icmp.ListenPacket("udp4", "0.0.0.0")
+	}
+	if err != nil {
+		return &Result{Msg: "icmp unavailable (needs cap_net_raw or ping_group_range): " + err.Error()}
+	}
+	defer conn.Close()
+	_ = conn.SetDeadline(time.Now().Add(4 * time.Second))
+
+	wm := icmp.Message{Type: ipv4.ICMPTypeEcho, Code: 0, Body: &icmp.Echo{
+		ID:   1,
+		Seq:  1,
+		Data: []byte("dash"),
+	}}
+	wb, err := wm.Marshal(nil)
+	if err != nil {
+		return &Result{Msg: err.Error()}
+	}
+	start := time.Now()
+	var dstAddr net.Addr = dst
+	if _, err := conn.WriteTo(wb, dstAddr); err != nil {
+		return &Result{Msg: err.Error()}
+	}
+	rb := make([]byte, 1500)
+	for {
+		n, _, err := conn.ReadFrom(rb)
+		if err != nil {
+			return &Result{Msg: "no reply: " + err.Error()}
+		}
+		rm, err := icmp.ParseMessage(ipv4.ICMPTypeEchoReply.Protocol(), rb[:n])
+		if err != nil {
+			continue
+		}
+		if rm.Type == ipv4.ICMPTypeEchoReply {
+			return &Result{Up: true, PingMs: int(time.Since(start).Milliseconds()), Msg: "echo reply"}
+		}
+	}
+}
+
+func checkDNS(ctx context.Context, m *Monitor) *Result {
+	host := hostOf(m)
+	if host == "" {
+		return &Result{Msg: "hostname required"}
+	}
+	r := net.DefaultResolver
+	start := time.Now()
+	var answers []string
+	var err error
+	switch strings.ToUpper(m.DNSType) {
+	case "AAAA":
+		var ips []net.IP
+		ips, err = r.LookupIP(ctx, "ip6", host)
+		for _, ip := range ips {
+			answers = append(answers, ip.String())
+		}
+	case "MX":
+		var mxs []*net.MX
+		mxs, err = r.LookupMX(ctx, host)
+		for _, mx := range mxs {
+			answers = append(answers, mx.Host)
+		}
+	case "NS":
+		var nss []*net.NS
+		nss, err = r.LookupNS(ctx, host)
+		for _, ns := range nss {
+			answers = append(answers, ns.Host)
+		}
+	case "TXT":
+		answers, err = r.LookupTXT(ctx, host)
+	case "CNAME":
+		var c string
+		c, err = r.LookupCNAME(ctx, host)
+		if c != "" {
+			answers = []string{c}
+		}
+	default: // A
+		var ips []net.IP
+		ips, err = r.LookupIP(ctx, "ip4", host)
+		for _, ip := range ips {
+			answers = append(answers, ip.String())
+		}
+	}
+	ping := int(time.Since(start).Milliseconds())
+	if err != nil {
+		return &Result{Msg: err.Error()}
+	}
+	if len(answers) == 0 {
+		return &Result{Msg: "no records"}
+	}
+	res := &Result{Up: true, PingMs: ping, Msg: strings.Join(answers, ", ")}
+	if m.Expected != "" {
+		for _, a := range answers {
+			if strings.Contains(a, m.Expected) {
+				return res
+			}
+		}
+		res.Up = false
+		res.Msg = fmt.Sprintf("no record contains %q (got %s)", m.Expected, res.Msg)
+	}
+	return res
+}

apps/backend/internal/widget/adguard.go

@@ -11,7 +11,7 @@ import (
 // AdGuard Home REST API: GET /control/stats with HTTP basic auth.
 type adguard struct{}
 
-func init() { register(adguard{}) }
+func init() { Register(adguard{}) }
 
 func (adguard) Meta() Type {
 	return Type{

apps/backend/internal/widget/clock.go

@@ -10,7 +10,7 @@ import (
 // it and the add-widget dialog can offer it like any other type.
 type clock struct{}
 
-func init() { register(clock{}) }
+func init() { Register(clock{}) }
 
 func (clock) Meta() Type {
 	return Type{

apps/backend/internal/widget/immich.go

@@ -10,7 +10,7 @@ import (
 // Immich REST API: GET /api/statistics with an x-api-key header.
 type immich struct{}
 
-func init() { register(immich{}) }
+func init() { Register(immich{}) }
 
 func (immich) Meta() Type {
 	return Type{

apps/backend/internal/widget/pihole.go

@@ -11,7 +11,7 @@ import (
 // jarvis: v5 only for now — v6 (/api/...) lands when someone runs it.
 type pihole struct{}
 
-func init() { register(pihole{}) }
+func init() { Register(pihole{}) }
 
 func (pihole) Meta() Type {
 	return Type{

apps/backend/internal/widget/widget.go

@@ -40,7 +40,9 @@ type Fetcher interface {
 
 var registry = map[string]Fetcher{}
 
-func register(f Fetcher) { registry[f.Meta().Type] = f }
+// Register adds a fetcher — used by the api package for DB-backed widgets
+// (monitor/domain/system) that can't live in this leaf package.
+func Register(f Fetcher) { registry[f.Meta().Type] = f }
 
 // Get resolves a config.type to its fetcher.
 func Get(t string) (Fetcher, bool) {

apps/frontend/package.json

@@ -28,8 +28,10 @@
     "lucide-react": "^0.545.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",
+    "recharts": "^3.10.1",
     "tailwind-merge": "^3.3.1",
-    "tw-animate-css": "^1.4.0"
+    "tw-animate-css": "^1.4.0",
+    "wouter": "^3.11.0"
   },
   "devDependencies": {
     "@tailwindcss/vite": "^4.1.13",

apps/frontend/src/App.tsx

@@ -1,12 +1,16 @@
 import { useEffect, useState } from "react";
-import { LayoutGrid, Moon, Plus, Search, Settings, Sun } from "lucide-react";
+import { Link, Route, useLocation } from "wouter";
+import { Activity, LayoutGrid, Moon, Plus, Search, Settings, Sun } from "lucide-react";
 import { BoardProvider, useBoard } from "@/board/store";
 import { Board } from "@/board/Board";
 import { ServiceDialog } from "@/components/ServiceDialog";
 import { WidgetDialog } from "@/components/WidgetDialog";
 import { SettingsDialog } from "@/components/SettingsDialog";
 import { CommandPalette } from "@/components/CommandPalette";
+import { MonitorsPage } from "@/pages/MonitorsPage";
+import { MonitorDetailPage } from "@/pages/MonitorDetailPage";
 import { Button } from "@/components/ui/button";
+import { cn } from "@/lib/utils";
 import type { Item } from "@/types";
 
 export default function App() {
@@ -17,8 +21,14 @@ export default function App() {
 	);
 }
 
+const NAV = [
+	{ href: "/", label: "Board", icon: LayoutGrid },
+	{ href: "/monitors", label: "Monitors", icon: Activity },
+];
+
 function Shell() {
 	const board = useBoard();
+	const [loc] = useLocation();
 	const [settingsOpen, setSettingsOpen] = useState(false);
 	const [paletteOpen, setPaletteOpen] = useState(false);
 	const [svcOpen, setSvcOpen] = useState(false);
@@ -60,6 +70,24 @@ function Shell() {
 					</svg>
 					Dash
 				</div>
+				<nav className="ml-6 flex items-center gap-1" aria-label="Primary">
+					{NAV.map((n) => {
+						const active = n.href === "/" ? loc === "/" : loc.startsWith(n.href);
+						return (
+							<Link
+								key={n.href}
+								href={n.href}
+								className={cn(
+									"flex items-center gap-1.5 rounded-[7px] px-2.5 py-1.5 text-[12.5px] transition-colors",
+									active ? "bg-surface-hover text-text" : "text-text-faint hover:text-text",
+								)}
+							>
+								<n.icon size={13} strokeWidth={1.8} />
+								{n.label}
+							</Link>
+						);
+					})}
+				</nav>
 				<div className="ml-auto flex items-center gap-2">
 					<Button
 						variant="outline" aria-label="Search (⌘K)"
@@ -95,7 +123,15 @@ function Shell() {
 				</div>
 			</header>
 
+			<Route path="/">
 				<Board onEditItem={openEditor} />
+			</Route>
+			<Route path="/monitors">
+				<MonitorsPage />
+			</Route>
+			<Route path="/monitors/:id">
+				{(p) => <MonitorDetailPage id={p.id} />}
+			</Route>
 
 			<ServiceDialog open={svcOpen} onOpenChange={setSvcOpen} item={editing?.kind === "service" ? editing : undefined} />
 			<WidgetDialog open={wdgOpen} onOpenChange={setWdgOpen} item={editing?.kind === "widget" ? editing : undefined} />

apps/frontend/src/components/CommandPalette.tsx

@@ -1,5 +1,6 @@
 import { useEffect, useMemo, useRef, useState } from "react";
-import { ArrowRight, Download, LayoutGrid, Moon, Plus, Settings, Sun } from "lucide-react";
+import { useLocation } from "wouter";
+import { Activity, ArrowRight, Download, LayoutGrid, Moon, Plus, Settings, Sun } from "lucide-react";
 import { useBoard } from "@/board/store";
 import { hostOf, IconImg } from "@/board/primitives";
 import { rendererLabels, rendererList } from "@/renderers";
@@ -34,12 +35,15 @@ export function CommandPalette({
 	onSettings(): void;
 }) {
 	const board = useBoard();
+	const [, navigate] = useLocation();
 	const [query, setQuery] = useState("");
 	const [active, setActive] = useState(0);
 	const listRef = useRef<HTMLDivElement>(null);
 
 	const commands = useMemo<Command[]>(() => {
 		const cmds: Command[] = [
+			{ id: "nav-board", group: "Actions", glyph: LayoutGrid, label: "Go to Board", run: () => navigate("/") },
+			{ id: "nav-monitors", group: "Actions", glyph: Activity, label: "Go to Monitors", run: () => navigate("/monitors") },
 			{ id: "add-service", group: "Actions", glyph: Plus, label: "Add service", hint: "new", run: onAddService },
 			{ id: "add-widget", group: "Actions", glyph: Plus, label: "Add widget", hint: "new", run: onAddWidget },
 			{ id: "settings", group: "Actions", glyph: Settings, label: "Open settings", run: onSettings },
@@ -73,7 +77,7 @@ export function CommandPalette({
 			}
 		}
 		return cmds;
-	}, [board.sections, board.theme, board.renderer, board.setSetting, onAddService, onAddWidget, onSettings]);
+	}, [board.sections, board.theme, board.renderer, board.setSetting, onAddService, onAddWidget, onSettings, navigate]);
 
 	const q = query.trim().toLowerCase();
 	const filtered = q

apps/frontend/src/components/MonitorDialog.tsx

@@ -0,0 +1,242 @@
+import { useEffect, useState } from "react";
+import { api } from "@/api";
+import type { Monitor, MonitorInput } from "@/types";
+import { Button } from "@/components/ui/button";
+import {
+	Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle,
+} from "@/components/ui/dialog";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
+
+const TYPES = ["http", "tcp", "ping", "dns", "keyword", "json", "push"] as const;
+type MonType = (typeof TYPES)[number];
+
+// One dialog for add + edit. The type picker drives which fields matter —
+// same pattern as ServiceDialog.
+export function MonitorDialog({
+	open,
+	onOpenChange,
+	monitor,
+	onSaved,
+}: {
+	open: boolean;
+	onOpenChange: (o: boolean) => void;
+	monitor?: Monitor | undefined;
+	onSaved: () => void;
+}) {
+	const editing = Boolean(monitor);
+	const [f, setF] = useState<Record<string, string>>({});
+	const [busy, setBusy] = useState(false);
+	const [err, setErr] = useState("");
+
+	useEffect(() => {
+		if (!open) return;
+		setErr("");
+		setF({
+			name: monitor?.name ?? "",
+			type: monitor?.type ?? "http",
+			url: monitor?.url ?? "",
+			hostname: monitor?.hostname ?? "",
+			port: monitor?.port ? String(monitor.port) : "",
+			method: monitor?.method ?? "GET",
+			keyword: monitor?.keyword ?? "",
+			keywordInvert: monitor?.keywordInvert ? "1" : "",
+			jsonQuery: monitor?.jsonQuery ?? "",
+			expected: monitor?.expected ?? "",
+			dnsType: monitor?.dnsType ?? "A",
+			intervalS: String(monitor?.intervalS ?? 60),
+			timeoutS: String(monitor?.timeoutS ?? 10),
+			retries: String(monitor?.retries ?? 0),
+			notes: monitor?.notes ?? "",
+		});
+	}, [open, monitor]);
+
+	const set = (k: string) => (e: React.ChangeEvent<HTMLInputElement>) =>
+		setF((s) => ({ ...s, [k]: e.target.value }));
+	const type = (f.type || "http") as MonType;
+
+	async function submit() {
+		if (!f.name?.trim()) return setErr("Name is required"), undefined;
+		if (type !== "push" && type !== "tcp" && type !== "ping" && type !== "dns" && !f.url?.trim())
+			return setErr("URL is required"), undefined;
+		if ((type === "tcp" || type === "ping" || type === "dns") && !f.hostname?.trim() && !f.url?.trim())
+			return setErr("Hostname is required"), undefined;
+		setBusy(true);
+		const body: MonitorInput = {
+			name: f.name.trim(),
+			type,
+			url: f.url?.trim() ?? "",
+			hostname: f.hostname?.trim() ?? "",
+			port: parseInt(f.port ?? "0") || 0,
+			method: f.method || "GET",
+			keyword: f.keyword ?? "",
+			keywordInvert: f.keywordInvert === "1",
+			jsonQuery: f.jsonQuery ?? "",
+			expected: f.expected ?? "",
+			dnsType: f.dnsType || "A",
+			intervalS: Math.max(10, parseInt(f.intervalS ?? "60") || 60),
+			timeoutS: Math.max(1, parseInt(f.timeoutS ?? "10") || 10),
+			retries: Math.max(0, parseInt(f.retries ?? "0") || 0),
+			notes: f.notes ?? "",
+		};
+		try {
+			if (editing && monitor) {
+				await api.PATCH("/api/monitors/{id}", { params: { path: { id: monitor.id! } }, body });
+			} else {
+				await api.POST("/api/monitors", { body });
+			}
+			onSaved();
+			onOpenChange(false);
+		} catch {
+			setErr("save failed");
+		} finally {
+			setBusy(false);
+		}
+	}
+
+	return (
+		<Dialog open={open} onOpenChange={onOpenChange}>
+			<DialogContent className="max-w-md">
+				<DialogHeader>
+					<DialogTitle>{editing ? "Edit monitor" : "New monitor"}</DialogTitle>
+					<DialogDescription>Uptime check on a schedule.</DialogDescription>
+				</DialogHeader>
+
+				<div className="flex max-h-[60vh] flex-col gap-4 overflow-y-auto pr-1">
+					<div className="grid grid-cols-[1fr_130px] gap-3">
+						<div className="flex flex-col gap-1.5">
+							<Label htmlFor="mon-name">Name</Label>
+							<Input id="mon-name" value={f.name ?? ""} onChange={set("name")} placeholder="Plex" autoFocus />
+						</div>
+						<div className="flex flex-col gap-1.5">
+							<Label>Type</Label>
+							<Select value={type} onValueChange={(v) => setF((s) => ({ ...s, type: v }))}>
+								<SelectTrigger><SelectValue /></SelectTrigger>
+								<SelectContent>
+									{TYPES.map((t) => <SelectItem key={t} value={t}>{t}</SelectItem>)}
+								</SelectContent>
+							</Select>
+						</div>
+					</div>
+
+					{(type === "http" || type === "keyword" || type === "json") && (
+						<>
+							<div className="grid grid-cols-[1fr_110px] gap-3">
+								<div className="flex flex-col gap-1.5">
+									<Label htmlFor="mon-url">URL</Label>
+									<Input id="mon-url" value={f.url ?? ""} onChange={set("url")} placeholder="https://plex.local" className="font-mono text-[12px]" />
+								</div>
+								<div className="flex flex-col gap-1.5">
+									<Label>Method</Label>
+									<Select value={f.method || "GET"} onValueChange={(v) => setF((s) => ({ ...s, method: v }))}>
+										<SelectTrigger><SelectValue /></SelectTrigger>
+										<SelectContent>
+											{["GET", "HEAD", "POST"].map((m) => <SelectItem key={m} value={m}>{m}</SelectItem>)}
+										</SelectContent>
+									</Select>
+								</div>
+							</div>
+							{type === "keyword" && (
+								<div className="flex flex-col gap-1.5">
+									<Label htmlFor="mon-kw">Keyword</Label>
+									<Input id="mon-kw" value={f.keyword ?? ""} onChange={set("keyword")} placeholder="text that must appear" className="font-mono text-[12px]" />
+									<label className="flex items-center gap-2 text-[12px] text-text-dim">
+										<input type="checkbox" checked={f.keywordInvert === "1"}
+											onChange={(e) => setF((s) => ({ ...s, keywordInvert: e.target.checked ? "1" : "" }))} />
+										Invert (down when found)
+									</label>
+								</div>
+							)}
+							{type === "json" && (
+								<div className="grid grid-cols-2 gap-3">
+									<div className="flex flex-col gap-1.5">
+										<Label htmlFor="mon-jq">JSON path</Label>
+										<Input id="mon-jq" value={f.jsonQuery ?? ""} onChange={set("jsonQuery")} placeholder="data.status" className="font-mono text-[12px]" />
+									</div>
+									<div className="flex flex-col gap-1.5">
+										<Label htmlFor="mon-exp">Expected</Label>
+										<Input id="mon-exp" value={f.expected ?? ""} onChange={set("expected")} placeholder="ok" className="font-mono text-[12px]" />
+									</div>
+								</div>
+							)}
+						</>
+					)}
+
+					{(type === "tcp" || type === "ping" || type === "dns") && (
+						<div className="grid grid-cols-[1fr_110px] gap-3">
+							<div className="flex flex-col gap-1.5">
+								<Label htmlFor="mon-host">Hostname</Label>
+								<Input id="mon-host" value={f.hostname ?? ""} onChange={set("hostname")} placeholder="nas.local" className="font-mono text-[12px]" />
+							</div>
+							{type === "tcp" ? (
+								<div className="flex flex-col gap-1.5">
+									<Label htmlFor="mon-port">Port</Label>
+									<Input id="mon-port" value={f.port ?? ""} onChange={set("port")} placeholder="443" className="font-mono text-[12px]" />
+								</div>
+							) : type === "dns" ? (
+								<div className="flex flex-col gap-1.5">
+									<Label>Record</Label>
+									<Select value={f.dnsType || "A"} onValueChange={(v) => setF((s) => ({ ...s, dnsType: v }))}>
+										<SelectTrigger><SelectValue /></SelectTrigger>
+										<SelectContent>
+											{["A", "AAAA", "CNAME", "MX", "NS", "TXT"].map((t) => <SelectItem key={t} value={t}>{t}</SelectItem>)}
+										</SelectContent>
+									</Select>
+								</div>
+							) : <div />}
+						</div>
+					)}
+					{type === "dns" && (
+						<div className="flex flex-col gap-1.5">
+							<Label htmlFor="mon-dnsexp">Expected record contains (optional)</Label>
+							<Input id="mon-dnsexp" value={f.expected ?? ""} onChange={set("expected")} className="font-mono text-[12px]" />
+						</div>
+					)}
+
+					{type === "push" && (
+						<p className="rounded-[8px] border border-border bg-surface px-3 py-2 text-[12px] text-text-dim">
+							After saving, your jobs call the shown push URL on a schedule.
+							If it goes quiet for 2× the interval, the monitor flips down.
+						</p>
+					)}
+
+					<div className="grid grid-cols-3 gap-3">
+						<div className="flex flex-col gap-1.5">
+							<Label htmlFor="mon-int">Interval (s)</Label>
+							<Input id="mon-int" value={f.intervalS ?? "60"} onChange={set("intervalS")} className="font-mono text-[12px]" />
+						</div>
+						<div className="flex flex-col gap-1.5">
+							<Label htmlFor="mon-to">Timeout (s)</Label>
+							<Input id="mon-to" value={f.timeoutS ?? "10"} onChange={set("timeoutS")} className="font-mono text-[12px]" />
+						</div>
+						<div className="flex flex-col gap-1.5">
+							<Label htmlFor="mon-re">Retries</Label>
+							<Input id="mon-re" value={f.retries ?? "0"} onChange={set("retries")} className="font-mono text-[12px]" />
+						</div>
+					</div>
+
+					{monitor?.pushToken ? (
+						<div className="flex flex-col gap-1.5">
+							<Label>Push URL</Label>
+							<code className="rounded-[8px] border border-border bg-surface px-3 py-2 font-mono text-[11px] text-text-dim">
+								{location.origin}/api/push/{monitor.pushToken}
+							</code>
+						</div>
+					) : null}
+
+					{err ? <p className="text-[12px] text-destructive">{err}</p> : null}
+				</div>
+
+				<DialogFooter className="items-center">
+					<Button type="button" variant="outline" onClick={() => onOpenChange(false)} disabled={busy}>
+						Cancel
+					</Button>
+					<Button type="button" onClick={() => void submit()} disabled={busy}>
+						{busy ? "Saving…" : editing ? "Save" : "Add monitor"}
+					</Button>
+				</DialogFooter>
+			</DialogContent>
+		</Dialog>
+	);
+}

apps/frontend/src/components/ServiceDialog.tsx

@@ -1,6 +1,7 @@
 import { useEffect, useRef, useState } from "react";
 import { Plus, Trash2, Upload, X } from "lucide-react";
 import { useBoard } from "@/board/store";
+import { api } from "@/api";
 import type { Item, UrlInput } from "@/types";
 import { Button } from "@/components/ui/button";
 import {
@@ -33,6 +34,7 @@ export function ServiceDialog({
 	const [icon, setIcon] = useState("");
 	const [urls, setUrls] = useState<UrlInput[]>([{ url: "", label: "local" }]);
 	const [sectionId, setSectionId] = useState("");
+	const [alsoMonitor, setAlsoMonitor] = useState(false);
 	const [busy, setBusy] = useState(false);
 	const [err, setErr] = useState("");
 	const fileRef = useRef<HTMLInputElement>(null);
@@ -48,6 +50,7 @@ export function ServiceDialog({
 				: [{ url: "", label: "local" }],
 		);
 		setSectionId(item?.sectionId ?? board.sections[0]?.id ?? "");
+		setAlsoMonitor(false);
 	}, [open, item, board.sections]);
 
 	const setUrl = (i: number, patch: Partial<UrlInput>) =>
@@ -81,6 +84,12 @@ export function ServiceDialog({
 					urls: cleanUrls,
 				});
 				if (created && file) await board.uploadIcon(created.id, file);
+				if (alsoMonitor && cleanUrls[0]) {
+					// Uptime check on the primary URL — appears under /monitors.
+					await api.POST("/api/monitors", {
+						body: { name: name.trim(), type: "http", url: cleanUrls[0].url },
+					});
+				}
 			}
 			onOpenChange(false);
 		} catch (e) {
@@ -193,6 +202,17 @@ export function ServiceDialog({
 						<p className="text-[11px] text-text-faint">URL or uploaded file; blank shows a letter tile.</p>
 					</div>
 
+					{!editing && (
+						<label className="flex items-center gap-2 text-[12.5px] text-text-dim">
+							<input
+								type="checkbox"
+								checked={alsoMonitor}
+								onChange={(e) => setAlsoMonitor(e.target.checked)}
+							/>
+							Also create an uptime monitor for the first URL
+						</label>
+					)}
+
 					{err ? <p className="text-[12px] text-destructive">{err}</p> : null}
 				</div>
 

apps/frontend/src/components/SettingsDialog.tsx

@@ -28,11 +28,22 @@ export function SettingsDialog({ open, onOpenChange }: { open: boolean; onOpenCh
 
 	async function importJson(file: File) {
 		setMsg("");
-		const res = await fetch("/api/import", { method: "POST", body: file });
+		// Dash exports are JSON with {version, sections}; anything else
+		// (Homepage/Homarr/Dashy) goes to the external importer for sniffing.
+		let target = "/api/import/external";
+		try {
+			const j: unknown = JSON.parse(await file.text());
+			if (j !== null && typeof j === "object" && "version" in j && "sections" in j) {
+				target = "/api/import";
+			}
+		} catch { /* not JSON — external importer handles YAML */ }
+		const res = await fetch(target, { method: "POST", body: file });
 		if (res.ok) {
 			location.reload(); // import replaces state; a reload re-syncs everything
 		} else {
-			setMsg("Import failed — not a Dash export?");
+			// SAFETY: error responses always carry {error: string} per openapi.yaml Error schema.
+			const body = (await res.json().catch(() => null)) as { error?: string } | null;
+			setMsg(body?.error ?? "Import failed");
 		}
 	}
 
@@ -90,7 +101,7 @@ export function SettingsDialog({ open, onOpenChange }: { open: boolean; onOpenCh
 							<Upload size={12} /> Import
 						</Button>
 						<input
-							ref={fileRef} type="file" accept="application/json" className="hidden"
+							ref={fileRef} type="file" accept=".json,.yml,.yaml" className="hidden"
 							onChange={(e) => {
 								const f = e.target.files?.[0];
 								if (f) void importJson(f);
@@ -98,6 +109,7 @@ export function SettingsDialog({ open, onOpenChange }: { open: boolean; onOpenCh
 							}}
 						/>
 					</div>
+					<p className="text-[11px] text-text-faint">Import accepts Dash exports plus Homepage, Homarr, and Dashy configs.</p>
 					{msg ? <p className="text-[12px] text-destructive">{msg}</p> : null}
 				</div>
 			</DialogContent>

apps/frontend/src/components/WidgetDialog.tsx

@@ -31,6 +31,7 @@ export function WidgetDialog({
 	const [name, setName] = useState("");
 	const [sectionId, setSectionId] = useState("");
 	const [values, setValues] = useState<Record<string, string>>({});
+	const [monitors, setMonitors] = useState<{ id?: string; name?: string }[]>([]);
 	const [busy, setBusy] = useState(false);
 	const [err, setErr] = useState("");
 
@@ -42,6 +43,10 @@ export function WidgetDialog({
 			.then((r) => r.json() as Promise<WidgetType[]>)
 			.then(setTypes)
 			.catch(() => setTypes([]));
+		fetch("/api/monitors")
+			.then((r) => r.json() as Promise<{ id?: string; name?: string }[]>)
+			.then(setMonitors)
+			.catch(() => setMonitors([]));
 
 		const cfg = item?.config ?? null;
 		setType(cfg && typeof cfg.type === "string" ? cfg.type : "");
@@ -141,6 +146,19 @@ export function WidgetDialog({
 							<Label htmlFor={`wdg-${f.key}`}>
 								{f.label}{f.required ? "" : " (optional)"}
 							</Label>
+							{f.key === "monitorId" ? (
+								<Select
+									value={values[f.key] ?? ""}
+									onValueChange={(v) => setValues((s) => ({ ...s, [f.key]: v }))}
+								>
+									<SelectTrigger><SelectValue placeholder="Pick a monitor…" /></SelectTrigger>
+									<SelectContent>
+										{monitors.map((m) => (
+											<SelectItem key={m.id} value={m.id ?? ""}>{m.name}</SelectItem>
+										))}
+									</SelectContent>
+								</Select>
+							) : (
 								<Input
 									id={`wdg-${f.key}`}
 									type={f.secret ? "password" : "text"}
@@ -149,6 +167,7 @@ export function WidgetDialog({
 									onChange={(e) => setValues((v) => ({ ...v, [f.key]: e.target.value }))}
 									className="font-mono text-[12px]"
 								/>
+							)}
 						</div>
 					))}
 

apps/frontend/src/pages/MonitorDetailPage.tsx

@@ -0,0 +1,146 @@
+import { useCallback, useEffect, useState } from "react";
+import { Link } from "wouter";
+import { ArrowLeft, Pause, Play, RefreshCw, Trash2 } from "lucide-react";
+import { Area, AreaChart, CartesianGrid, ResponsiveContainer, Tooltip, XAxis, YAxis } from "recharts";
+import { api } from "@/api";
+import type { Heartbeat, MonitorView } from "@/types";
+import { MonitorDialog } from "@/components/MonitorDialog";
+import { Button } from "@/components/ui/button";
+import { cn } from "@/lib/utils";
+
+export function MonitorDetailPage({ id }: { id: string }) {
+	const [m, setM] = useState<MonitorView | null>(null);
+	const [hbs, setHbs] = useState<Heartbeat[]>([]);
+	const [hours, setHours] = useState(24);
+	const [dlgOpen, setDlgOpen] = useState(false);
+
+	const load = useCallback(async () => {
+		const [{ data: mv }, { data: hb }] = await Promise.all([
+			api.GET("/api/monitors/{id}", { params: { path: { id } } }),
+			api.GET("/api/monitors/{id}/heartbeats", { params: { path: { id }, query: { hours } } }),
+		]);
+		if (mv) setM(mv);
+		if (hb) setHbs(hb);
+	}, [id, hours]);
+
+	useEffect(() => {
+		void load();
+		const t = setInterval(() => void load(), 30_000);
+		return () => clearInterval(t);
+	}, [load]);
+
+	if (!m) return <main className="mx-auto max-w-5xl px-7 py-8 text-[13px] text-text-faint">Loading…</main>;
+
+	const chart = hbs.map((h) => ({
+		t: new Date(h.checkedAt ?? "").toLocaleTimeString([], { hour: "2-digit", minute: "2-digit" }),
+		ping: h.pingMs,
+		up: h.status === "up",
+	}));
+
+	return (
+		<main className="mx-auto w-full max-w-5xl px-7 py-8">
+			<Link href="/monitors" className="mb-4 inline-flex items-center gap-1.5 text-[12px] text-text-faint hover:text-text">
+				<ArrowLeft size={12} /> Monitors
+			</Link>
+
+			<div className="mb-6 flex items-start justify-between">
+				<div>
+					<div className="flex items-center gap-2.5">
+						<span className={cn("size-2 rounded-full", m.status === "up" ? "bg-up" : m.status === "down" ? "bg-down" : "bg-text-faint/40")} />
+						<h1 className="text-[17px] font-semibold tracking-tight">{m.name}</h1>
+						<span className="font-mono text-[10.5px] uppercase tracking-[0.08em] text-text-faint">{m.status}</span>
+					</div>
+					<p className="mt-1 font-mono text-[11.5px] text-text-faint">
+						{m.type} · {m.url || m.hostname}{m.port ? `:${m.port}` : ""} · every {m.intervalS}s
+					</p>
+				</div>
+				<div className="flex gap-2">
+					<Button variant="outline" size="sm" onClick={() => void api.POST("/api/monitors/{id}/check", { params: { path: { id } } }).then(load)}>
+						<RefreshCw size={12} /> Check now
+					</Button>
+					<Button variant="outline" size="sm"
+						onClick={() => void api.PATCH("/api/monitors/{id}", { params: { path: { id } }, body: { active: !m.active } }).then(load)}>
+						{m.active ? <Pause size={12} /> : <Play size={12} />} {m.active ? "Pause" : "Resume"}
+					</Button>
+					<Button variant="outline" size="sm" onClick={() => setDlgOpen(true)}>Edit</Button>
+					<Button variant="outline" size="sm" aria-label="Delete"
+						onClick={() => {
+							if (confirm(`Delete monitor "${m.name}"?`)) {
+								void api.DELETE("/api/monitors/{id}", { params: { path: { id } } }).then(() => { location.href = "/monitors"; });
+							}
+						}}>
+						<Trash2 size={12} />
+					</Button>
+				</div>
+			</div>
+
+			<div className="mb-6 grid grid-cols-4 gap-3 max-[720px]:grid-cols-2">
+				{[
+					["Uptime 24h", `${m.stats?.uptime24h?.toFixed(2)}%`],
+					["Uptime 30d", `${m.stats?.uptime30d?.toFixed(2)}%`],
+					["Avg ping 24h", m.stats?.avgPing24h ? `${m.stats.avgPing24h} ms` : "—"],
+					["Checks", String((m.stats?.up ?? 0) + (m.stats?.down ?? 0))],
+				].map(([k, v]) => (
+					<div key={k} className="rounded-[10px] border border-border bg-surface px-4 py-3">
+						<div className="font-mono text-[10px] uppercase tracking-[0.1em] text-text-faint">{k}</div>
+						<div className="mt-1 font-mono text-[17px] font-medium">{v}</div>
+					</div>
+				))}
+			</div>
+
+			<div className="mb-2 flex items-center justify-between">
+				<h2 className="font-mono text-[10.5px] uppercase tracking-[0.12em] text-text-faint">Response time</h2>
+				<div className="flex gap-1">
+					{[24, 168, 720].map((h) => (
+						<button key={h} type="button" onClick={() => setHours(h)}
+							className={cn("rounded-[6px] px-2 py-1 font-mono text-[10.5px]",
+								hours === h ? "bg-surface-hover text-text" : "text-text-faint hover:text-text")}>
+							{h === 24 ? "24h" : h === 168 ? "7d" : "30d"}
+						</button>
+					))}
+				</div>
+			</div>
+			<div className="mb-6 h-56 rounded-[10px] border border-border bg-surface p-3">
+				<ResponsiveContainer width="100%" height="100%">
+					<AreaChart data={chart} margin={{ top: 4, right: 4, bottom: 0, left: -18 }}>
+						<CartesianGrid stroke="var(--border)" strokeDasharray="3 3" vertical={false} />
+						<XAxis dataKey="t" tick={{ fontSize: 10, fill: "var(--text-faint)" }} tickLine={false} axisLine={false} minTickGap={40} />
+						<YAxis tick={{ fontSize: 10, fill: "var(--text-faint)" }} tickLine={false} axisLine={false} unit=" ms" width={62} />
+						<Tooltip
+							contentStyle={{ background: "var(--surface)", border: "1px solid var(--border)", borderRadius: 8, fontSize: 11 }}
+							labelStyle={{ color: "var(--text-faint)" }}
+						/>
+						<Area type="monotone" dataKey="ping" stroke="var(--up)" fill="var(--up)" fillOpacity={0.12} strokeWidth={1.5} dot={false} isAnimationActive={false} />
+					</AreaChart>
+				</ResponsiveContainer>
+			</div>
+
+			<h2 className="mb-2 font-mono text-[10.5px] uppercase tracking-[0.12em] text-text-faint">Recent checks</h2>
+			<div className="overflow-hidden rounded-[10px] border border-border">
+				<table className="w-full text-[12px]">
+					<tbody>
+						{[...hbs].reverse().slice(0, 40).map((h) => (
+							<tr key={h.id} className="border-b border-border/60 last:border-0">
+								<td className="px-4 py-2 font-mono text-[10.5px] text-text-faint">
+									{new Date(h.checkedAt ?? "").toLocaleString()}
+								</td>
+								<td className="px-4 py-2">
+									<span className={cn("font-mono text-[10.5px] uppercase", h.status === "up" ? "text-up" : "text-down")}>
+										{h.status}
+									</span>
+								</td>
+								<td className="px-4 py-2 font-mono text-[11px] text-text-dim">{h.pingMs ? `${h.pingMs}ms` : "—"}</td>
+								<td className="px-4 py-2 font-mono text-[11px] text-text-faint">{h.msg}</td>
+							</tr>
+						))}
+						{hbs.length === 0 && (
+							<tr><td className="px-4 py-6 text-center text-text-faint">No checks in range.</td></tr>
+						)}
+					</tbody>
+				</table>
+			</div>
+
+			<MonitorDialog open={dlgOpen} onOpenChange={setDlgOpen} monitor={m} onSaved={load} />
+		</main>
+	);
+}

apps/frontend/src/pages/MonitorsPage.tsx

@@ -0,0 +1,135 @@
+import { useCallback, useEffect, useState } from "react";
+import { Link } from "wouter";
+import { Pause, Play, Plus, RefreshCw, Trash2 } from "lucide-react";
+import { api } from "@/api";
+import type { MonitorView } from "@/types";
+import { MonitorDialog } from "@/components/MonitorDialog";
+import { Button } from "@/components/ui/button";
+import { cn } from "@/lib/utils";
+
+function StatusDot({ status }: { status?: string }) {
+	return (
+		<span
+			className={cn(
+				"size-1.5 shrink-0 rounded-full",
+				status === "up" ? "bg-up" : status === "down" ? "bg-down" : "bg-text-faint/40",
+			)}
+		/>
+	);
+}
+
+export function MonitorsPage() {
+	const [monitors, setMonitors] = useState<MonitorView[]>([]);
+	const [loaded, setLoaded] = useState(false);
+	const [dlgOpen, setDlgOpen] = useState(false);
+	const [editing, setEditing] = useState<MonitorView | undefined>();
+
+	const load = useCallback(async () => {
+		const { data } = await api.GET("/api/monitors");
+		if (data) setMonitors(data);
+		setLoaded(true);
+	}, []);
+
+	useEffect(() => {
+		void load();
+		const t = setInterval(() => void load(), 30_000);
+		return () => clearInterval(t);
+	}, [load]);
+
+	async function act(id: string | undefined, fn: () => Promise<unknown>) {
+		if (!id) return;
+		await fn();
+		await load();
+	}
+
+	return (
+		<main className="mx-auto w-full max-w-5xl px-7 py-8">
+			<div className="mb-5 flex items-center justify-between">
+				<div>
+					<h1 className="text-[15px] font-semibold tracking-tight">Monitors</h1>
+					<p className="text-[12px] text-text-faint">Uptime checks on a schedule.</p>
+				</div>
+				<Button onClick={() => { setEditing(undefined); setDlgOpen(true); }}>
+					<Plus size={13} strokeWidth={2.2} /> New monitor
+				</Button>
+			</div>
+
+			{loaded && monitors.length === 0 ? (
+				<div className="rounded-[10px] border border-dashed border-border px-6 py-14 text-center">
+					<p className="text-[13px] text-text-dim">No monitors yet.</p>
+					<p className="mt-1 text-[11.5px] text-text-faint">
+						HTTP, TCP, ping, DNS, keyword, JSON path, or push — checks run server-side on your interval.
+					</p>
+				</div>
+			) : (
+				<div className="overflow-hidden rounded-[10px] border border-border">
+					<table className="w-full text-[13px]">
+						<thead>
+							<tr className="border-b border-border bg-surface text-left font-mono text-[10px] uppercase tracking-[0.1em] text-text-faint">
+								<th className="px-4 py-2.5 font-medium">Status</th>
+								<th className="px-4 py-2.5 font-medium">Name</th>
+								<th className="px-4 py-2.5 font-medium">Type</th>
+								<th className="px-4 py-2.5 font-medium">Uptime 24h</th>
+								<th className="px-4 py-2.5 font-medium">Uptime 30d</th>
+								<th className="px-4 py-2.5 font-medium">Ping</th>
+								<th className="px-4 py-2.5 font-medium">Every</th>
+								<th className="px-4 py-2.5" />
+							</tr>
+						</thead>
+						<tbody>
+							{monitors.map((m) => (
+								<tr key={m.id} className="border-b border-border/60 last:border-0 hover:bg-surface-hover/60">
+									<td className="px-4 py-3">
+										<span className="flex items-center gap-2 font-mono text-[10.5px] uppercase tracking-[0.06em] text-text-faint">
+											<StatusDot status={m.status} />
+											{m.status}
+										</span>
+									</td>
+									<td className="px-4 py-3 font-medium">
+										<Link href={`/monitors/${m.id}`} className="hover:underline">{m.name}</Link>
+									</td>
+									<td className="px-4 py-3 font-mono text-[11px] text-text-dim">{m.type}</td>
+									<td className="px-4 py-3 font-mono text-[11px] text-text-dim">
+										{m.stats?.uptime24h?.toFixed(1)}%
+									</td>
+									<td className="px-4 py-3 font-mono text-[11px] text-text-dim">
+										{m.stats?.uptime30d?.toFixed(1)}%
+									</td>
+									<td className="px-4 py-3 font-mono text-[11px] text-text-dim">
+										{m.stats?.avgPing24h ? `${m.stats.avgPing24h}ms` : "—"}
+									</td>
+									<td className="px-4 py-3 font-mono text-[11px] text-text-dim">{m.intervalS}s</td>
+									<td className="px-4 py-3">
+										<div className="flex items-center justify-end gap-1">
+											<Button variant="outline" size="icon" aria-label="Check now"
+												onClick={() => void act(m.id, () => api.POST("/api/monitors/{id}/check", { params: { path: { id: m.id! } } }))}>
+												<RefreshCw size={12} />
+											</Button>
+											<Button variant="outline" size="icon" aria-label={m.active ? "Pause" : "Resume"}
+												onClick={() => void act(m.id, () => api.PATCH("/api/monitors/{id}", { params: { path: { id: m.id! } }, body: { active: !m.active } }))}>
+												{m.active ? <Pause size={12} /> : <Play size={12} />}
+											</Button>
+											<Button variant="outline" size="icon" aria-label="Delete"
+												onClick={() => {
+													if (confirm(`Delete monitor "${m.name}"?`)) {
+														void act(m.id, () => api.DELETE("/api/monitors/{id}", { params: { path: { id: m.id! } } }));
+													}
+												}}>
+												<Trash2 size={12} />
+											</Button>
+											<Button variant="outline" size="sm" onClick={() => { setEditing(m); setDlgOpen(true); }}>
+												Edit
+											</Button>
+										</div>
+									</td>
+								</tr>
+							))}
+						</tbody>
+					</table>
+				</div>
+			)}
+
+			<MonitorDialog open={dlgOpen} onOpenChange={setDlgOpen} monitor={editing} onSaved={load} />
+		</main>
+	);
+}

apps/frontend/src/types.ts

@@ -11,6 +11,12 @@ export type Status = components["schemas"]["Status"];
 export type StatusMap = Record<string, Status>;
 export type ExportPayload = components["schemas"]["Export"];
 
+// Monitoring (merge program) — same generated-schema rule applies.
+export type Monitor = components["schemas"]["Monitor"];
+export type MonitorInput = components["schemas"]["MonitorInput"];
+export type MonitorView = components["schemas"]["MonitorView"];
+export type Heartbeat = components["schemas"]["Heartbeat"];
+
 export type Theme = "dark" | "light";
 export type RendererName = "bento" | "cards" | "index" | "console";
 

apps/frontend/src/widgets/index.tsx

@@ -3,6 +3,7 @@ import type { Item } from "@/types";
 import { ClockWidget } from "@/widgets/clock";
 import { PiholeWidget, AdguardWidget } from "@/widgets/blocker";
 import { ImmichWidget } from "@/widgets/immich";
+import { MonitorWidget } from "@/widgets/monitor";
 
 // WidgetHost seam: renderers own the tile chrome; this maps config.type to
 // the component that fills it. Adding a widget = one fetcher in Go + one
@@ -28,6 +29,7 @@ const registry: WidgetRegistry = {
 	pihole: { view: PiholeWidget },
 	adguard: { view: AdguardWidget },
 	immich: { view: ImmichWidget },
+	monitor: { view: MonitorWidget },
 };
 
 export function cfgStr(item: Item, key: string): string {

apps/frontend/src/widgets/monitor.tsx

@@ -0,0 +1,38 @@
+import type { WidgetData } from "@/widgets";
+import type { Item } from "@/types";
+import { cn } from "@/lib/utils";
+
+// Board tile for an uptime monitor: status dot, uptime %, avg ping.
+// config.monitorId binds it; data comes from the monitor fetcher.
+export function MonitorWidget({ item, data, error }: {
+	item: Item;
+	data: WidgetData | undefined;
+	error: string | undefined;
+}) {
+	const status = typeof data?.status === "string" ? data.status : undefined;
+	const uptime = typeof data?.uptime24 === "number" ? data.uptime24 : undefined;
+	const ping = typeof data?.ping === "number" ? data.ping : undefined;
+	const monId = typeof item.config?.monitorId === "string" ? item.config.monitorId : "";
+
+	return (
+		<a
+			href={monId ? `/monitors/${monId}` : "/monitors"}
+			className="flex w-full items-center gap-2.5 text-left"
+			onClick={(e) => e.stopPropagation()}
+		>
+			<span
+				className={cn(
+					"size-1.5 shrink-0 rounded-full",
+					error ? "bg-down" : status === "up" ? "bg-up" : status === "down" ? "bg-down" : "bg-text-faint/40",
+				)}
+			/>
+			<span className="min-w-0 flex-1 truncate text-[12.5px] font-medium">
+				{typeof data?.name === "string" ? data.name : item.name}
+			</span>
+			<span className="shrink-0 font-mono text-[10.5px] text-text-faint">
+				{error ? "err" : uptime !== undefined ? `${uptime.toFixed(1)}%` : "…"}
+				{ping ? ` · ${Math.round(ping)}ms` : ""}
+			</span>
+		</a>
+	);
+}

openapi.yaml

@@ -214,6 +214,164 @@ paths:
         "404":
           $ref: "#/components/responses/NotFound"
 
+  /api/monitors:
+    get:
+      operationId: listMonitors
+      summary: All monitors with live uptime stats
+      responses:
+        "200":
+          description: Monitors ordered by position
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: "#/components/schemas/MonitorView"
+    post:
+      operationId: createMonitor
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/MonitorInput"
+      responses:
+        "201":
+          description: Created monitor
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/MonitorView"
+        "400":
+          $ref: "#/components/responses/BadRequest"
+
+  /api/monitors/{id}:
+    get:
+      operationId: getMonitor
+      parameters:
+        - $ref: "#/components/parameters/id"
+      responses:
+        "200":
+          description: Monitor with stats
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/MonitorView"
+        "404":
+          $ref: "#/components/responses/NotFound"
+    patch:
+      operationId: updateMonitor
+      summary: Sparse update; `active` toggles pause/resume
+      parameters:
+        - $ref: "#/components/parameters/id"
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              $ref: "#/components/schemas/MonitorInput"
+      responses:
+        "200":
+          description: Updated monitor
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/MonitorView"
+        "404":
+          $ref: "#/components/responses/NotFound"
+    delete:
+      operationId: deleteMonitor
+      parameters:
+        - $ref: "#/components/parameters/id"
+      responses:
+        "204":
+          description: Monitor and its heartbeats deleted
+        "404":
+          $ref: "#/components/responses/NotFound"
+
+  /api/monitors/{id}/heartbeats:
+    get:
+      operationId: monitorHeartbeats
+      parameters:
+        - $ref: "#/components/parameters/id"
+        - name: hours
+          in: query
+          schema:
+            type: integer
+            default: 24
+            maximum: 720
+      responses:
+        "200":
+          description: Check history, oldest first
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: "#/components/schemas/Heartbeat"
+
+  /api/monitors/{id}/check:
+    post:
+      operationId: checkMonitorNow
+      summary: Run one check synchronously
+      parameters:
+        - $ref: "#/components/parameters/id"
+      responses:
+        "200":
+          description: Monitor after the check
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/MonitorView"
+        "404":
+          $ref: "#/components/responses/NotFound"
+
+  /api/push/{token}:
+    get:
+      operationId: pushMonitorGet
+      summary: Record an up heartbeat for a push monitor
+      parameters:
+        - name: token
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: msg
+          in: query
+          schema:
+            type: string
+        - name: ping
+          in: query
+          schema:
+            type: integer
+      responses:
+        "200":
+          description: Heartbeat recorded
+        "404":
+          $ref: "#/components/responses/NotFound"
+    post:
+      operationId: pushMonitorPost
+      summary: Record an up heartbeat for a push monitor
+      parameters:
+        - name: token
+          in: path
+          required: true
+          schema:
+            type: string
+        - name: msg
+          in: query
+          schema:
+            type: string
+        - name: ping
+          in: query
+          schema:
+            type: integer
+      responses:
+        "200":
+          description: Heartbeat recorded
+        "404":
+          $ref: "#/components/responses/NotFound"
+
   /api/widgets/types:
     get:
       operationId: widgetTypes
@@ -330,6 +488,40 @@ paths:
         "400":
           $ref: "#/components/responses/BadRequest"
 
+  /api/import/external:
+    post:
+      operationId: importExternal
+      summary: >
+        Import a foreign dashboard config — Homepage services.yml, Homarr
+        JSON export, or Dashy conf.yml. Format is auto-detected; the board
+        is replaced and existing settings are preserved.
+      requestBody:
+        required: true
+        content:
+          application/octet-stream:
+            schema:
+              type: string
+              format: binary
+          application/json:
+            schema:
+              type: string
+              format: binary
+          text/yaml:
+            schema:
+              type: string
+              format: binary
+      responses:
+        "200":
+          description: Imported board tree
+          content:
+            application/json:
+              schema:
+                type: array
+                items:
+                  $ref: "#/components/schemas/Section"
+        "400":
+          $ref: "#/components/responses/BadRequest"
+
 components:
   parameters:
     id:
@@ -518,6 +710,150 @@ components:
         checkedAt:
           type: string
           format: date-time
+    Monitor:
+      type: object
+      required: [id, name, type, active, status]
+      properties:
+        id:
+          type: string
+        name:
+          type: string
+        type:
+          type: string
+          enum: [http, tcp, ping, dns, keyword, json, push]
+        url:
+          type: string
+        hostname:
+          type: string
+        port:
+          type: integer
+        method:
+          type: string
+        headers:
+          type: string
+          description: JSON object of request headers
+        body:
+          type: string
+        keyword:
+          type: string
+        keywordInvert:
+          type: boolean
+        jsonQuery:
+          type: string
+          description: Dot path into a JSON response, e.g. "data.status"
+        expected:
+          type: string
+        dnsType:
+          type: string
+        intervalS:
+          type: integer
+        timeoutS:
+          type: integer
+        retries:
+          type: integer
+        active:
+          type: boolean
+        status:
+          type: string
+          enum: [up, down, pending, paused, maintenance]
+        pushToken:
+          type: string
+        tags:
+          type: array
+          items:
+            type: string
+        notes:
+          type: string
+        position:
+          type: number
+        lastCheck:
+          type: string
+          format: date-time
+          nullable: true
+        createdAt:
+          type: string
+          format: date-time
+    MonitorInput:
+      type: object
+      properties:
+        name:
+          type: string
+        type:
+          type: string
+          enum: [http, tcp, ping, dns, keyword, json, push]
+        url:
+          type: string
+        hostname:
+          type: string
+        port:
+          type: integer
+        method:
+          type: string
+        headers:
+          type: string
+        body:
+          type: string
+        keyword:
+          type: string
+        keywordInvert:
+          type: boolean
+        jsonQuery:
+          type: string
+        expected:
+          type: string
+        dnsType:
+          type: string
+        intervalS:
+          type: integer
+        timeoutS:
+          type: integer
+        retries:
+          type: integer
+        active:
+          type: boolean
+        tags:
+          type: array
+          items:
+            type: string
+        notes:
+          type: string
+    UptimeStats:
+      type: object
+      properties:
+        up:
+          type: integer
+        down:
+          type: integer
+        uptime24h:
+          type: number
+        uptime30d:
+          type: number
+        avgPing24h:
+          type: integer
+    MonitorView:
+      allOf:
+        - $ref: "#/components/schemas/Monitor"
+        - type: object
+          properties:
+            stats:
+              $ref: "#/components/schemas/UptimeStats"
+    Heartbeat:
+      type: object
+      properties:
+        id:
+          type: integer
+        status:
+          type: string
+          enum: [up, down]
+        pingMs:
+          type: integer
+        msg:
+          type: string
+        certExpiry:
+          type: integer
+        checkedAt:
+          type: string
+          format: date-time
     WidgetField:
       type: object
       required: [key, label]

package-lock.json

@@ -37,8 +37,10 @@
         "lucide-react": "^0.545.0",
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
+        "recharts": "^3.10.1",
         "tailwind-merge": "^3.3.1",
-        "tw-animate-css": "^1.4.0"
+        "tw-animate-css": "^1.4.0",
+        "wouter": "^3.11.0"
       },
       "devDependencies": {
         "@tailwindcss/vite": "^4.1.13",
@@ -1986,6 +1988,32 @@
         "npm": ">=9.5.0"
       }
     },
+    "node_modules/@reduxjs/toolkit": {
+      "version": "2.12.0",
+      "resolved": "https://registry.npmjs.org/@reduxjs/toolkit/-/toolkit-2.12.0.tgz",
+      "integrity": "sha512-KiT+RzZbp6mQET+Mg+h2c97+9j1sNflUxQkIHI7Yuzf6Peu+OYpmkn6nbHWmLLWj+1ZODUJFwGZ7gx3L9R9EOw==",
+      "license": "MIT",
+      "dependencies": {
+        "@standard-schema/spec": "^1.0.0",
+        "@standard-schema/utils": "^0.3.0",
+        "immer": "^11.0.0",
+        "redux": "^5.0.1",
+        "redux-thunk": "^3.1.0",
+        "reselect": "^5.1.0"
+      },
+      "peerDependencies": {
+        "react": "^16.9.0 || ^17.0.0 || ^18 || ^19",
+        "react-redux": "^7.2.1 || ^8.1.3 || ^9.0.0"
+      },
+      "peerDependenciesMeta": {
+        "react": {
+          "optional": true
+        },
+        "react-redux": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@rolldown/pluginutils": {
       "version": "1.0.0-rc.3",
       "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0-rc.3.tgz",
@@ -2382,6 +2410,18 @@
         "win32"
       ]
     },
+    "node_modules/@standard-schema/spec": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@standard-schema/spec/-/spec-1.1.0.tgz",
+      "integrity": "sha512-l2aFy5jALhniG5HgqrD6jXLi/rUWrKvqN/qJx6yoJsgKhblVd+iqqU4RCXavm/jPityDo5TCvKMnpjKnOriy0w==",
+      "license": "MIT"
+    },
+    "node_modules/@standard-schema/utils": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/@standard-schema/utils/-/utils-0.3.0.tgz",
+      "integrity": "sha512-e7Mew686owMaPJVNNLs55PUvgz371nKgwsc4vxE49zsODpJEnxgxRo2y/OKrqueavXgZNMDVj3DdHFlaSAeU8g==",
+      "license": "MIT"
+    },
     "node_modules/@tailwindcss/node": {
       "version": "4.3.3",
       "resolved": "https://registry.npmjs.org/@tailwindcss/node/-/node-4.3.3.tgz",
@@ -2711,6 +2751,69 @@
         "@babel/types": "^7.28.2"
       }
     },
+    "node_modules/@types/d3-array": {
+      "version": "3.2.2",
+      "resolved": "https://registry.npmjs.org/@types/d3-array/-/d3-array-3.2.2.tgz",
+      "integrity": "sha512-hOLWVbm7uRza0BYXpIIW5pxfrKe0W+D5lrFiAEYR+pb6w3N2SwSMaJbXdUfSEv+dT4MfHBLtn5js0LAWaO6otw==",
+      "license": "MIT"
+    },
+    "node_modules/@types/d3-color": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/@types/d3-color/-/d3-color-3.1.3.tgz",
+      "integrity": "sha512-iO90scth9WAbmgv7ogoq57O9YpKmFBbmoEoCHDB2xMBY0+/KVrqAaCDyCE16dUspeOvIxFFRI+0sEtqDqy2b4A==",
+      "license": "MIT"
+    },
+    "node_modules/@types/d3-ease": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/@types/d3-ease/-/d3-ease-3.0.2.tgz",
+      "integrity": "sha512-NcV1JjO5oDzoK26oMzbILE6HW7uVXOHLQvHshBUW4UMdZGfiY6v5BeQwh9a9tCzv+CeefZQHJt5SRgK154RtiA==",
+      "license": "MIT"
+    },
+    "node_modules/@types/d3-interpolate": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/@types/d3-interpolate/-/d3-interpolate-3.0.4.tgz",
+      "integrity": "sha512-mgLPETlrpVV1YRJIglr4Ez47g7Yxjl1lj7YKsiMCb27VJH9W8NVM6Bb9d8kkpG/uAQS5AmbA48q2IAolKKo1MA==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/d3-color": "*"
+      }
+    },
+    "node_modules/@types/d3-path": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/@types/d3-path/-/d3-path-3.1.1.tgz",
+      "integrity": "sha512-VMZBYyQvbGmWyWVea0EHs/BwLgxc+MKi1zLDCONksozI4YJMcTt8ZEuIR4Sb1MMTE8MMW49v0IwI5+b7RmfWlg==",
+      "license": "MIT"
+    },
+    "node_modules/@types/d3-scale": {
+      "version": "4.0.9",
+      "resolved": "https://registry.npmjs.org/@types/d3-scale/-/d3-scale-4.0.9.tgz",
+      "integrity": "sha512-dLmtwB8zkAeO/juAMfnV+sItKjlsw2lKdZVVy6LRr0cBmegxSABiLEpGVmSJJ8O08i4+sGR6qQtb6WtuwJdvVw==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/d3-time": "*"
+      }
+    },
+    "node_modules/@types/d3-shape": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/@types/d3-shape/-/d3-shape-3.2.0.tgz",
+      "integrity": "sha512-kVd74ta9eof3eJOvbNd1vGKS/XERRyQbT26Og63hIsvDO84cjD5gEOhsXf26w3FSoNlPVz84DOFcKv/oou+fMw==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/d3-path": "*"
+      }
+    },
+    "node_modules/@types/d3-time": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/@types/d3-time/-/d3-time-3.0.4.tgz",
+      "integrity": "sha512-yuzZug1nkAAaBlBBikKZTgzCeA+k1uy4ZFwWANOfKw5z5LRhV0gNA7gNkKm7HoK+HRN0wX3EkxGk0fpbWhmB7g==",
+      "license": "MIT"
+    },
+    "node_modules/@types/d3-timer": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/@types/d3-timer/-/d3-timer-3.0.2.tgz",
+      "integrity": "sha512-Ps3T8E8dZDam6fUyNiMkekK3XUsaUEik+idO9/YjPtfj2qruF8tFBXS7XhtE4iIXBLxhmLjP3SXpLhVf21I9Lw==",
+      "license": "MIT"
+    },
     "node_modules/@types/estree": {
       "version": "1.0.9",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.9.tgz",
@@ -2756,6 +2859,12 @@
         "@types/react": "^18.0.0"
       }
     },
+    "node_modules/@types/use-sync-external-store": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/@types/use-sync-external-store/-/use-sync-external-store-0.0.6.tgz",
+      "integrity": "sha512-zFDAD+tlpf2r4asuHEj0XH6pY6i0g5NeAHPn+15wk3BV6JA69eERFXC1gyGThDkVa1zCyKr5jox1+2LbV/AMLg==",
+      "license": "MIT"
+    },
     "node_modules/@vitejs/plugin-react": {
       "version": "5.2.0",
       "resolved": "https://registry.npmjs.org/@vitejs/plugin-react/-/plugin-react-5.2.0.tgz",
@@ -2950,6 +3059,127 @@
       "devOptional": true,
       "license": "MIT"
     },
+    "node_modules/d3-array": {
+      "version": "3.2.4",
+      "resolved": "https://registry.npmjs.org/d3-array/-/d3-array-3.2.4.tgz",
+      "integrity": "sha512-tdQAmyA18i4J7wprpYq8ClcxZy3SC31QMeByyCFyRt7BVHdREQZ5lpzoe5mFEYZUWe+oq8HBvk9JjpibyEV4Jg==",
+      "license": "ISC",
+      "dependencies": {
+        "internmap": "1 - 2"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-color": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/d3-color/-/d3-color-3.1.0.tgz",
+      "integrity": "sha512-zg/chbXyeBtMQ1LbD/WSoW2DpC3I0mpmPdW+ynRTj/x2DAWYrIY7qeZIHidozwV24m4iavr15lNwIwLxRmOxhA==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-ease": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-ease/-/d3-ease-3.0.1.tgz",
+      "integrity": "sha512-wR/XK3D3XcLIZwpbvQwQ5fK+8Ykds1ip7A2Txe0yxncXSdq1L9skcG7blcedkOX+ZcgxGAmLX1FrRGbADwzi0w==",
+      "license": "BSD-3-Clause",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-format": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/d3-format/-/d3-format-3.1.2.tgz",
+      "integrity": "sha512-AJDdYOdnyRDV5b6ArilzCPPwc1ejkHcoyFarqlPqT7zRYjhavcT3uSrqcMvsgh2CgoPbK3RCwyHaVyxYcP2Arg==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-interpolate": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-interpolate/-/d3-interpolate-3.0.1.tgz",
+      "integrity": "sha512-3bYs1rOD33uo8aqJfKP3JWPAibgw8Zm2+L9vBKEHJ2Rg+viTR7o5Mmv5mZcieN+FRYaAOWX5SJATX6k1PWz72g==",
+      "license": "ISC",
+      "dependencies": {
+        "d3-color": "1 - 3"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-path": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/d3-path/-/d3-path-3.1.0.tgz",
+      "integrity": "sha512-p3KP5HCf/bvjBSSKuXid6Zqijx7wIfNW+J/maPs+iwR35at5JCbLUT0LzF1cnjbCHWhqzQTIN2Jpe8pRebIEFQ==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-scale": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/d3-scale/-/d3-scale-4.0.2.tgz",
+      "integrity": "sha512-GZW464g1SH7ag3Y7hXjf8RoUuAFIqklOAq3MRl4OaWabTFJY9PN/E1YklhXLh+OQ3fM9yS2nOkCoS+WLZ6kvxQ==",
+      "license": "ISC",
+      "dependencies": {
+        "d3-array": "2.10.0 - 3",
+        "d3-format": "1 - 3",
+        "d3-interpolate": "1.2.0 - 3",
+        "d3-time": "2.1.1 - 3",
+        "d3-time-format": "2 - 4"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-shape": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/d3-shape/-/d3-shape-3.2.0.tgz",
+      "integrity": "sha512-SaLBuwGm3MOViRq2ABk3eLoxwZELpH6zhl3FbAoJ7Vm1gofKx6El1Ib5z23NUEhF9AsGl7y+dzLe5Cw2AArGTA==",
+      "license": "ISC",
+      "dependencies": {
+        "d3-path": "^3.1.0"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-time": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/d3-time/-/d3-time-3.1.0.tgz",
+      "integrity": "sha512-VqKjzBLejbSMT4IgbmVgDjpkYrNWUYJnbCGo874u7MMKIWsILRX+OpX/gTk8MqjpT1A/c6HY2dCA77ZN0lkQ2Q==",
+      "license": "ISC",
+      "dependencies": {
+        "d3-array": "2 - 3"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-time-format": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/d3-time-format/-/d3-time-format-4.1.0.tgz",
+      "integrity": "sha512-dJxPBlzC7NugB2PDLwo9Q8JiTR3M3e4/XANkreKSUxF8vvXKqm1Yfq4Q5dl8budlunRVlUUaDUgFt7eA8D6NLg==",
+      "license": "ISC",
+      "dependencies": {
+        "d3-time": "1 - 3"
+      },
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/d3-timer": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/d3-timer/-/d3-timer-3.0.1.tgz",
+      "integrity": "sha512-ndfJ/JxxMd3nw31uyKoY2naivF+r29V+Lc0svZxe1JvvIRmi8hUsrMvdOwgS1o6uBHmiz91geQ0ylPP0aj1VUA==",
+      "license": "ISC",
+      "engines": {
+        "node": ">=12"
+      }
+    },
     "node_modules/debug": {
       "version": "4.4.3",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
@@ -2968,6 +3198,12 @@
         }
       }
     },
+    "node_modules/decimal.js-light": {
+      "version": "2.5.1",
+      "resolved": "https://registry.npmjs.org/decimal.js-light/-/decimal.js-light-2.5.1.tgz",
+      "integrity": "sha512-qIMFpTMZmny+MMIitAB6D7iVPEorVw6YQRWkvarTkT4tBeSLLiHzcwj6q0MmYSFCiVpiqPJTJEYIrpcPzVEIvg==",
+      "license": "MIT"
+    },
     "node_modules/detect-libc": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.1.2.tgz",
@@ -3005,6 +3241,18 @@
         "node": ">=10.13.0"
       }
     },
+    "node_modules/es-toolkit": {
+      "version": "1.52.0",
+      "resolved": "https://registry.npmjs.org/es-toolkit/-/es-toolkit-1.52.0.tgz",
+      "integrity": "sha512-XTNEJQh1tY1ZJVcf6ayP/2n4ZPyaHlW2FWs7xvw5ddPuhUVjLD3olQVQS7kf58JbAB48iL0uL/jerTrjtV3lDA==",
+      "license": "MIT",
+      "workspaces": [
+        "docs",
+        "benchmarks",
+        "tests/types",
+        "tests/browser-compat"
+      ]
+    },
     "node_modules/esbuild": {
       "version": "0.28.2",
       "resolved": "https://registry.npmjs.org/esbuild/-/esbuild-0.28.2.tgz",
@@ -3057,6 +3305,12 @@
         "node": ">=6"
       }
     },
+    "node_modules/eventemitter3": {
+      "version": "5.0.4",
+      "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-5.0.4.tgz",
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