diff --git a/backend/dashboard_layout_schema.py b/backend/dashboard_layout_schema.py
index 63372a4..d0b30c4 100644
--- a/backend/dashboard_layout_schema.py
+++ b/backend/dashboard_layout_schema.py
@@ -1,7 +1,7 @@
 """
 Dashboard-Layout v1 (Nutzer-Lab): Validierung und Standard-Layout.
 
-Single Source für erlaubte Widget-IDs (sync mit Frontend widgetRegistry).
+Erlaubte Widget-IDs und Standard-Reihenfolge: widget_catalog.WIDGET_CATALOG
 """
 from __future__ import annotations
 
@@ -9,27 +9,22 @@ from typing import Any, Literal
 
 from pydantic import BaseModel, Field, model_validator
 
-ALLOWED_WIDGET_IDS: frozenset[str] = frozenset(
-    {
-        "welcome",
-        "quick_capture",
-        "kpi_board",
-        "body_overview",
-        "activity_overview",
-    }
-)
+from widget_catalog import ALLOWED_WIDGET_IDS, WIDGET_CATALOG
+
+# Abwärtskompatibel (Tests importieren weiterhin aus diesem Modul)
+__all__ = [
+    "ALLOWED_WIDGET_IDS",
+    "DashboardLayoutPayload",
+    "DashboardWidgetEntry",
+    "coalesce_effective_layout",
+    "default_layout_dict",
+]
 
 
 def default_layout_dict() -> dict[str, Any]:
     return {
         "version": 1,
-        "widgets": [
-            {"id": "welcome", "enabled": True},
-            {"id": "quick_capture", "enabled": True},
-            {"id": "kpi_board", "enabled": True},
-            {"id": "body_overview", "enabled": True},
-            {"id": "activity_overview", "enabled": True},
-        ],
+        "widgets": [{"id": e["id"], "enabled": True} for e in WIDGET_CATALOG],
     }
 
 
diff --git a/backend/routers/app_dashboard.py b/backend/routers/app_dashboard.py
index 7124ed4..3598267 100644
--- a/backend/routers/app_dashboard.py
+++ b/backend/routers/app_dashboard.py
@@ -12,10 +12,18 @@ from auth import require_auth
 from dashboard_layout_schema import DashboardLayoutPayload, coalesce_effective_layout, default_layout_dict
 from db import get_cursor, get_db
 from routers.profiles import get_pid
+from widget_catalog import catalog_response
 
 router = APIRouter(prefix="/api/app", tags=["app-dashboard-lab"])
 
 
+@router.get("/widgets/catalog")
+def get_widgets_catalog(session: dict = Depends(require_auth)) -> dict[str, Any]:
+    """Metadaten aller registrierbaren Dashboard-Widgets (IDs, Titel)."""
+    _ = session
+    return catalog_response()
+
+
 @router.get("/dashboard-layout")
 def get_dashboard_layout(
     x_profile_id: Optional[str] = Header(default=None),
diff --git a/backend/tests/test_widget_catalog.py b/backend/tests/test_widget_catalog.py
new file mode 100644
index 0000000..25e186d
--- /dev/null
+++ b/backend/tests/test_widget_catalog.py
@@ -0,0 +1,25 @@
+"""Widget-Katalog: Konsistenz (IDs, Default-Layout, Katalog-Response)."""
+
+from dashboard_layout_schema import default_layout_dict
+from widget_catalog import ALLOWED_WIDGET_IDS, WIDGET_CATALOG, catalog_response
+
+
+def test_catalog_ids_unique_and_match_allowed():
+    ids = [e["id"] for e in WIDGET_CATALOG]
+    assert len(ids) == len(set(ids))
+    assert frozenset(ids) == ALLOWED_WIDGET_IDS
+
+
+def test_default_layout_follows_catalog_order():
+    d = default_layout_dict()
+    assert d["version"] == 1
+    got = [w["id"] for w in d["widgets"]]
+    assert got == [e["id"] for e in WIDGET_CATALOG]
+    assert all(w["enabled"] is True for w in d["widgets"])
+
+
+def test_catalog_response_shape():
+    r = catalog_response()
+    assert r["catalog_version"] == 1
+    assert len(r["widgets"]) == len(WIDGET_CATALOG)
+    assert {w["id"] for w in r["widgets"]} == ALLOWED_WIDGET_IDS
diff --git a/backend/version.py b/backend/version.py
index a54f0a8..20a4d2c 100644
--- a/backend/version.py
+++ b/backend/version.py
@@ -30,7 +30,7 @@ MODULE_VERSIONS = {
     "importdata": "1.0.0",
     "membership": "2.1.0",
     "workflow": "0.6.0",  # Phase 4: End Node Template Engine
-    "app_dashboard": "1.0.0",  # Dashboard-Lab Layout API (/api/app)
+    "app_dashboard": "1.1.0",  # Dashboard-Lab + GET /widgets/catalog (Widget-System Iteration 1)
 }
 
 CHANGELOG = [
diff --git a/backend/widget_catalog.py b/backend/widget_catalog.py
new file mode 100644
index 0000000..210d398
--- /dev/null
+++ b/backend/widget_catalog.py
@@ -0,0 +1,55 @@
+"""
+Öffentlicher Widget-Katalog (Dashboard-Lab / später Produkt-Dashboard).
+
+Single Source für: erlaubte IDs, Standard-Reihenfolge, Anzeige-Metadaten für API/GUI.
+Frontend-Komponenten registrieren dieselben IDs lokal (siehe widgetSystem/registerPilotLabWidgets).
+"""
+from __future__ import annotations
+
+from typing import Any, TypedDict
+
+
+class WidgetCatalogEntry(TypedDict):
+    id: str
+    title: str
+    description: str
+
+
+# Reihenfolge in der Liste = Standard-Layout (alle default_enabled: True im Default-Layout)
+WIDGET_CATALOG: list[WidgetCatalogEntry] = [
+    {
+        "id": "welcome",
+        "title": "Willkommen",
+        "description": "Begrüßung und Kurzkontext",
+    },
+    {
+        "id": "quick_capture",
+        "title": "Schnelleingabe",
+        "description": "Gewicht und Vitalwerte erfassen",
+    },
+    {
+        "id": "kpi_board",
+        "title": "KPI-Kacheln",
+        "description": "Referenzwerte, KF%, Kalorien",
+    },
+    {
+        "id": "body_overview",
+        "title": "Körper (Chart)",
+        "description": "Gewicht & Kennzahlen",
+    },
+    {
+        "id": "activity_overview",
+        "title": "Aktivität",
+        "description": "Training & Konsistenz",
+    },
+]
+
+ALLOWED_WIDGET_IDS: frozenset[str] = frozenset(e["id"] for e in WIDGET_CATALOG)
+
+
+def catalog_response() -> dict[str, Any]:
+    """Payload für GET /api/app/widgets/catalog."""
+    return {
+        "catalog_version": 1,
+        "widgets": list(WIDGET_CATALOG),
+    }
diff --git a/frontend/src/app/areas/dashboardLab/dashboardLabWidgets.js b/frontend/src/app/areas/dashboardLab/dashboardLabWidgets.js
deleted file mode 100644
index 13db16f..0000000
--- a/frontend/src/app/areas/dashboardLab/dashboardLabWidgets.js
+++ /dev/null
@@ -1,10 +0,0 @@
-/**
- * Dashboard-Lab: Widget-Metadaten (IDs müssen mit backend/dashboard_layout_schema.py übereinstimmen).
- */
-export const DASHBOARD_LAB_WIDGET_META = [
-  { id: 'welcome', label: 'Willkommen' },
-  { id: 'quick_capture', label: 'Schnelleingabe' },
-  { id: 'kpi_board', label: 'KPI-Kacheln' },
-  { id: 'body_overview', label: 'Körper (Chart)' },
-  { id: 'activity_overview', label: 'Aktivität' },
-]
diff --git a/frontend/src/pages/DashboardLabPage.jsx b/frontend/src/pages/DashboardLabPage.jsx
index 18ce9fe..ac09de2 100644
--- a/frontend/src/pages/DashboardLabPage.jsx
+++ b/frontend/src/pages/DashboardLabPage.jsx
@@ -2,45 +2,34 @@ import { useCallback, useEffect, useState } from 'react'
 import { ChevronDown, ChevronUp, LayoutGrid } from 'lucide-react'
 import { Link } from 'react-router-dom'
 import { api, formatFastApiDetail } from '../utils/api'
-import { DASHBOARD_LAB_WIDGET_META } from '../app/areas/dashboardLab/dashboardLabWidgets'
-import PilotWelcome from '../components/pilot/PilotWelcome'
-import PilotQuickCapture from '../components/pilot/PilotQuickCapture'
-import PilotKpiBoard from '../components/pilot/PilotKpiBoard'
-import PilotBodySection from '../components/pilot/PilotBodySection'
-import PilotActivitySection from '../components/pilot/PilotActivitySection'
+import { WidgetRenderer } from '../widgetSystem/dashboardWidgetRegistry'
+import { ensurePilotLabWidgetsRegistered } from '../widgetSystem/registerPilotLabWidgets'
+import { moveWidget, toggleWidget } from '../widgetSystem/layoutEditor'
 
-const metaById = Object.fromEntries(DASHBOARD_LAB_WIDGET_META.map((m) => [m.id, m]))
-
-function moveWidget(layout, index, delta) {
-  const next = [...layout.widgets]
-  const j = index + delta
-  if (j < 0 || j >= next.length) return layout
-  ;[next[index], next[j]] = [next[j], next[index]]
-  return { ...layout, widgets: next }
-}
-
-function toggleWidget(layout, index) {
-  const next = layout.widgets.map((w, i) =>
-    i === index ? { ...w, enabled: !w.enabled } : w
-  )
-  const anyOn = next.some((w) => w.enabled)
-  if (!anyOn) return layout
-  return { ...layout, widgets: next }
+function catalogMetaById(catalog) {
+  if (!catalog?.widgets?.length) return {}
+  return Object.fromEntries(catalog.widgets.map((w) => [w.id, w]))
 }
 
 export default function DashboardLabPage() {
+  ensurePilotLabWidgetsRegistered()
+
   const [refreshTick, setRefreshTick] = useState(0)
-  const bump = () => setRefreshTick((t) => t + 1)
+  const requestRefresh = () => setRefreshTick((t) => t + 1)
+  const [catalog, setCatalog] = useState(null)
   const [bundle, setBundle] = useState(null)
   const [layout, setLayout] = useState(null)
   const [err, setErr] = useState(null)
   const [busy, setBusy] = useState(false)
   const [msg, setMsg] = useState(null)
 
+  const metaById = catalogMetaById(catalog)
+
   const load = useCallback(async () => {
     setErr(null)
     try {
-      const b = await api.getAppDashboardLayout()
+      const [cat, b] = await Promise.all([api.getAppWidgetsCatalog(), api.getAppDashboardLayout()])
+      setCatalog(cat)
       setBundle(b)
       setLayout(b.layout)
     } catch (e) {
@@ -92,23 +81,6 @@ export default function DashboardLabPage() {
     }
   }
 
-  const renderWidget = (id) => {
-    switch (id) {
-      case 'welcome':
-        return <PilotWelcome key="welcome" />
-      case 'quick_capture':
-        return <PilotQuickCapture key="quick_capture" onSaved={bump} />
-      case 'kpi_board':
-        return <PilotKpiBoard key="kpi_board" refreshTick={refreshTick} />
-      case 'body_overview':
-        return <PilotBodySection key="body_overview" refreshTick={refreshTick} />
-      case 'activity_overview':
-        return <PilotActivitySection key="activity_overview" refreshTick={refreshTick} />
-      default:
-        return null
-    }
-  }
-
   if (err && !layout) {
     return (
       <div style={{ padding: 24, maxWidth: 640, margin: '0 auto' }}>
@@ -128,8 +100,6 @@ export default function DashboardLabPage() {
     )
   }
 
-  const enabledOrder = layout.widgets.filter((w) => w.enabled)
-
   return (
     <div style={{ paddingBottom: 96, textAlign: 'left', maxWidth: 920, margin: '0 auto' }}>
       <div style={{ marginBottom: 20 }}>
@@ -145,10 +115,10 @@ export default function DashboardLabPage() {
           App-Bereich: Dashboard-Lab
         </h1>
         <p style={{ fontSize: 13, color: 'var(--text2)', lineHeight: 1.6, marginTop: 8 }}>
-          Geschützte Route (Login erforderlich). Widget-Reihenfolge und Sichtbarkeit werden pro Profil in der
-          Datenbank gespeichert — getrennt vom Produktiv-Dashboard. Vergleich:{' '}
+          Widget-System (Iteration 1): Katalog vom Server, Registry im Frontend, Renderer für alle
+          Pilot-Module. Layout wird pro Profil persistiert — getrennt vom Produktiv-Dashboard. Vergleich:{' '}
           <Link to="/pilot/viz" style={{ color: 'var(--accent)' }}>
-            Pilot-Übersicht (festes Layout)
+            Pilot-Übersicht (festes Standard-Layout)
           </Link>
           .
         </p>
@@ -171,15 +141,11 @@ export default function DashboardLabPage() {
             Status: {bundle.custom ? 'individuell gespeichert' : 'Standard (nicht in DB)'}
           </p>
         )}
-        {err && (
-          <p style={{ fontSize: 12, color: '#D85A30', marginBottom: 8 }}>{err}</p>
-        )}
-        {msg && (
-          <p style={{ fontSize: 12, color: 'var(--accent)', marginBottom: 8 }}>{msg}</p>
-        )}
+        {err && <p style={{ fontSize: 12, color: '#D85A30', marginBottom: 8 }}>{err}</p>}
+        {msg && <p style={{ fontSize: 12, color: 'var(--accent)', marginBottom: 8 }}>{msg}</p>}
         <ul style={{ listStyle: 'none', padding: 0, margin: '0 0 12px' }}>
           {layout.widgets.map((w, i) => {
-            const label = metaById[w.id]?.label || w.id
+            const label = metaById[w.id]?.title || w.id
             return (
               <li
                 key={w.id}
@@ -237,7 +203,7 @@ export default function DashboardLabPage() {
         </div>
       </div>
 
-      {enabledOrder.map((w) => renderWidget(w.id))}
+      <WidgetRenderer layout={layout} refreshTick={refreshTick} requestRefresh={requestRefresh} />
     </div>
   )
 }
diff --git a/frontend/src/pages/PilotVizPage.jsx b/frontend/src/pages/PilotVizPage.jsx
index a657ead..a45351b 100644
--- a/frontend/src/pages/PilotVizPage.jsx
+++ b/frontend/src/pages/PilotVizPage.jsx
@@ -1,21 +1,19 @@
 import { useState } from 'react'
 import { FlaskConical } from 'lucide-react'
 import { Link } from 'react-router-dom'
-import PilotWelcome from '../components/pilot/PilotWelcome'
-import PilotQuickCapture from '../components/pilot/PilotQuickCapture'
-import PilotKpiBoard from '../components/pilot/PilotKpiBoard'
-import PilotBodySection from '../components/pilot/PilotBodySection'
-import PilotActivitySection from '../components/pilot/PilotActivitySection'
+import { WidgetRenderer } from '../widgetSystem/dashboardWidgetRegistry'
+import { ensurePilotLabWidgetsRegistered } from '../widgetSystem/registerPilotLabWidgets'
+import { DEFAULT_LAB_LAYOUT } from '../widgetSystem/defaultLabLayout'
 
 /**
- * Pilot-Übersicht nach Product-Spec:
- * Willkommen → Schnelleingabe (Gewicht + Vitalwerte) → KPIs (Referenzen + KF% + Ø kcal, max. 9)
- * → Bereich Körper (Gewicht-Chart 30 T, Ø7/Ø14, Bewertung wie Verlauf)
- * → Bereich Aktivität (Trainingstyp 30 T, Konsistenz).
+ * Pilot-Übersicht nach Product-Spec (festes Standard-Layout).
+ * Nutzt dasselbe Widget-Rendering wie /app/dashboard-lab.
  */
 export default function PilotVizPage() {
+  ensurePilotLabWidgetsRegistered()
+
   const [refreshTick, setRefreshTick] = useState(0)
-  const bump = () => setRefreshTick((t) => t + 1)
+  const requestRefresh = () => setRefreshTick((t) => t + 1)
 
   return (
     <div style={{ paddingBottom: 96, textAlign: 'left', maxWidth: 920, margin: '0 auto' }}>
@@ -37,11 +35,11 @@ export default function PilotVizPage() {
         </p>
       </div>
 
-      <PilotWelcome />
-      <PilotQuickCapture onSaved={bump} />
-      <PilotKpiBoard refreshTick={refreshTick} />
-      <PilotBodySection refreshTick={refreshTick} />
-      <PilotActivitySection refreshTick={refreshTick} />
+      <WidgetRenderer
+        layout={DEFAULT_LAB_LAYOUT}
+        refreshTick={refreshTick}
+        requestRefresh={requestRefresh}
+      />
     </div>
   )
 }
diff --git a/frontend/src/utils/api.js b/frontend/src/utils/api.js
index 815ae7d..ad04e3b 100644
--- a/frontend/src/utils/api.js
+++ b/frontend/src/utils/api.js
@@ -70,7 +70,8 @@ export const api = {
   getProfile:    ()      => req('/profile'),
   updateActiveProfile:(d)=> req('/profile', jput(d)),
 
-  // App-Bereich: Dashboard-Lab (Layout JSON, Issue #65)
+  // App-Bereich: Dashboard-Lab (Layout JSON, Issue #65) + Widget-Katalog
+  getAppWidgetsCatalog: () => req('/app/widgets/catalog'),
   getAppDashboardLayout: () => req('/app/dashboard-layout'),
   putAppDashboardLayout: (layout) => req('/app/dashboard-layout', jput(layout)),
   resetAppDashboardLayout: () => req('/app/dashboard-layout/reset', { method: 'POST' }),
diff --git a/frontend/src/widgetSystem/dashboardWidgetRegistry.jsx b/frontend/src/widgetSystem/dashboardWidgetRegistry.jsx
new file mode 100644
index 0000000..edb7ead
--- /dev/null
+++ b/frontend/src/widgetSystem/dashboardWidgetRegistry.jsx
@@ -0,0 +1,60 @@
+/** @typedef {{ refreshTick: number, requestRefresh: () => void }} WidgetRenderContext */
+
+const registry = new Map()
+
+/**
+ * @param {{ id: string, Component: import('react').ComponentType<any>, mapProps?: (ctx: WidgetRenderContext) => Record<string, unknown> }} spec
+ */
+export function registerDashboardWidget(spec) {
+  if (!spec?.id || !spec?.Component) {
+    console.warn('registerDashboardWidget: id und Component erforderlich', spec)
+    return
+  }
+  registry.set(spec.id, spec)
+}
+
+export function getRegisteredWidgetIds() {
+  return [...registry.keys()]
+}
+
+export function clearDashboardWidgetRegistry() {
+  registry.clear()
+}
+
+/**
+ * Nur für Tests: Registry neu füllen.
+ */
+export function __resetDashboardWidgetRegistryForTests() {
+  registry.clear()
+}
+
+/**
+ * @param {string} id
+ * @param {WidgetRenderContext} ctx
+ */
+export function renderRegisteredWidget(id, ctx) {
+  const spec = registry.get(id)
+  if (!spec) {
+    return (
+      <div key={id} className="card" style={{ borderColor: 'var(--danger, #D85A30)', marginBottom: 16 }}>
+        <strong>Unbekanntes Widget</strong>
+        <div style={{ fontSize: 13, color: 'var(--text2)' }}>{id}</div>
+      </div>
+    )
+  }
+  const { Component } = spec
+  const props = spec.mapProps ? spec.mapProps(ctx) : {}
+  return <Component key={id} {...props} />
+}
+
+/**
+ * Rendert alle aktivierten Widgets in Layout-Reihenfolge.
+ * @param {{ version: number, widgets: Array<{ id: string, enabled: boolean }> }} layout
+ * @param {WidgetRenderContext} ctx
+ */
+export function WidgetRenderer({ layout, refreshTick, requestRefresh }) {
+  if (!layout?.widgets?.length) return null
+  const ctx = { refreshTick, requestRefresh }
+  const enabled = layout.widgets.filter((w) => w.enabled)
+  return <>{enabled.map((w) => renderRegisteredWidget(w.id, ctx))}</>
+}
diff --git a/frontend/src/widgetSystem/defaultLabLayout.js b/frontend/src/widgetSystem/defaultLabLayout.js
new file mode 100644
index 0000000..5da9c5c
--- /dev/null
+++ b/frontend/src/widgetSystem/defaultLabLayout.js
@@ -0,0 +1,15 @@
+/**
+ * Standard-Layout v1 (nur Pilot-Fallback ohne API).
+ * Reihenfolge: gleich backend/widget_catalog.WIDGET_CATALOG bei Änderung dort mitpflegen
+ * (oder später nur noch aus GET /api/app/dashboard-layout default_layout beziehen).
+ */
+export const DEFAULT_LAB_LAYOUT = {
+  version: 1,
+  widgets: [
+    { id: 'welcome', enabled: true },
+    { id: 'quick_capture', enabled: true },
+    { id: 'kpi_board', enabled: true },
+    { id: 'body_overview', enabled: true },
+    { id: 'activity_overview', enabled: true },
+  ],
+}
diff --git a/frontend/src/widgetSystem/layoutEditor.js b/frontend/src/widgetSystem/layoutEditor.js
new file mode 100644
index 0000000..4737714
--- /dev/null
+++ b/frontend/src/widgetSystem/layoutEditor.js
@@ -0,0 +1,16 @@
+export function moveWidget(layout, index, delta) {
+  const next = [...layout.widgets]
+  const j = index + delta
+  if (j < 0 || j >= next.length) return layout
+  const t = next[index]
+  next[index] = next[j]
+  next[j] = t
+  return { ...layout, widgets: next }
+}
+
+export function toggleWidget(layout, index) {
+  const next = layout.widgets.map((w, i) => (i === index ? { ...w, enabled: !w.enabled } : w))
+  const anyOn = next.some((w) => w.enabled)
+  if (!anyOn) return layout
+  return { ...layout, widgets: next }
+}
diff --git a/frontend/src/widgetSystem/registerPilotLabWidgets.js b/frontend/src/widgetSystem/registerPilotLabWidgets.js
new file mode 100644
index 0000000..5d21cdc
--- /dev/null
+++ b/frontend/src/widgetSystem/registerPilotLabWidgets.js
@@ -0,0 +1,47 @@
+/**
+ * Pilot/Lab-Widgets registrieren. IDs müssen zu backend/widget_catalog.WIDGET_CATALOG passen.
+ */
+import PilotWelcome from '../components/pilot/PilotWelcome'
+import PilotQuickCapture from '../components/pilot/PilotQuickCapture'
+import PilotKpiBoard from '../components/pilot/PilotKpiBoard'
+import PilotBodySection from '../components/pilot/PilotBodySection'
+import PilotActivitySection from '../components/pilot/PilotActivitySection'
+import { registerDashboardWidget } from './dashboardWidgetRegistry'
+
+let _registered = false
+
+export function ensurePilotLabWidgetsRegistered() {
+  if (_registered) return
+  _registered = true
+
+  registerDashboardWidget({
+    id: 'welcome',
+    Component: PilotWelcome,
+    mapProps: () => ({}),
+  })
+  registerDashboardWidget({
+    id: 'quick_capture',
+    Component: PilotQuickCapture,
+    mapProps: (ctx) => ({ onSaved: ctx.requestRefresh }),
+  })
+  registerDashboardWidget({
+    id: 'kpi_board',
+    Component: PilotKpiBoard,
+    mapProps: (ctx) => ({ refreshTick: ctx.refreshTick }),
+  })
+  registerDashboardWidget({
+    id: 'body_overview',
+    Component: PilotBodySection,
+    mapProps: (ctx) => ({ refreshTick: ctx.refreshTick }),
+  })
+  registerDashboardWidget({
+    id: 'activity_overview',
+    Component: PilotActivitySection,
+    mapProps: (ctx) => ({ refreshTick: ctx.refreshTick }),
+  })
+}
+
+/** @internal Nur für Tests */
+export function __resetPilotLabRegistrationForTests() {
+  _registered = false
+}