feat: Introduce admin dashboard product standard management

- Added new API endpoints for managing the product dashboard standard, including retrieval, update, and deletion functionalities.
- Enhanced the DashboardConfigurePage to support admin mode for configuring the product dashboard standard.
- Updated the admin navigation to include a link for the product dashboard standard configuration.
- Refactored the dashboard layout logic to utilize the new product standard management features.
- Bumped app_dashboard version to 1.10.0 to reflect these enhancements and changes.

backend/dashboard_layout_schema.py

@@ -39,7 +39,7 @@ def lab_default_layout_dict() -> dict[str, Any]:
 
 
 def product_default_layout_dict() -> dict[str, Any]:
-    """System-Standard für die Produkt-Übersicht (kein DB-Override)."""
+    """Code-Fallback für die Produkt-Übersicht; live-Standard ggf. system_config (siehe get_product_default_base_dict)."""
     on = DEFAULT_PRODUCT_DASHBOARD_WIDGET_IDS
     return {
         "version": 1,

backend/dashboard_widget_entitlements.py

@@ -58,6 +58,14 @@ def widgets_catalog_payload(profile_id: str, conn) -> dict[str, Any]:
     }
 
 
+def widgets_catalog_admin_payload() -> dict[str, Any]:
+    """Admin: alle Widgets als auswählbar (ohne Feature-Filter)."""
+    return {
+        "catalog_version": 1,
+        "widgets": [_public_row(e, allowed=True) for e in WIDGET_CATALOG],
+    }
+
+
 def apply_entitlements_to_layout_dict(layout: dict[str, Any], profile_id: str, conn) -> dict[str, Any]:
     """
     Setzt enabled=False für Widgets ohne Berechtigung. Mindestens ein Widget bleibt aktiv (welcome).

backend/migrations/040_system_config.sql

@@ -0,0 +1,8 @@
+-- Globale System-Konfiguration (Key/Value, JSONB)
+CREATE TABLE IF NOT EXISTS system_config (
+    key VARCHAR(64) PRIMARY KEY,
+    value JSONB NOT NULL,
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE INDEX IF NOT EXISTS idx_system_config_updated_at ON system_config (updated_at);

backend/routers/admin.py

@@ -7,12 +7,21 @@ import os
 import smtplib
 from email.mime.text import MIMEText
 from datetime import datetime
+from typing import Any
 
 from fastapi import APIRouter, HTTPException, Depends
 
 from db import get_db, get_cursor, r2d
 from auth import require_admin, hash_pin
 from models import AdminProfileUpdate
+from dashboard_layout_schema import DashboardLayoutPayload, product_default_layout_dict
+from dashboard_widget_entitlements import widgets_catalog_admin_payload
+from system_dashboard_product_default import (
+    delete_product_default_override,
+    get_product_default_base_dict,
+    get_stored_product_default_validated,
+    upsert_product_default_base,
+)
 
 router = APIRouter(prefix="/api/admin", tags=["admin"])
 
@@ -155,3 +164,52 @@ def admin_test_email(data: dict, session: dict=Depends(require_admin)):
         return {"ok": True, "message": f"Test-E-Mail an {email} gesendet"}
     except Exception as e:
         raise HTTPException(500, f"Fehler beim Senden: {str(e)}")
+
+
+@router.get("/widgets/catalog-full")
+def admin_widgets_catalog_full(session: dict = Depends(require_admin)):
+    """Dashboard-Widget-Katalog ohne Feature-Filter (Konfiguration des Produkt-Standards)."""
+    _ = session
+    return widgets_catalog_admin_payload()
+
+
+@router.get("/dashboard-product-default")
+def admin_get_dashboard_product_default(session: dict = Depends(require_admin)):
+    """Aktueller Produkt-Dashboard-Standard (DB oder Code)."""
+    _ = session
+    with get_db() as conn:
+        layout = get_product_default_base_dict(conn)
+        from_database = get_stored_product_default_validated(conn) is not None
+        code_ref = product_default_layout_dict()
+    return {
+        "from_database": from_database,
+        "layout": layout,
+        "code_reference": code_ref,
+    }
+
+
+@router.put("/dashboard-product-default")
+def admin_put_dashboard_product_default(
+    body: dict[str, Any],
+    session: dict = Depends(require_admin),
+):
+    """System-Standard persistieren (JSON wie Nutzer-Layout v1)."""
+    _ = session
+    try:
+        payload = DashboardLayoutPayload.model_validate(body)
+    except Exception as e:
+        raise HTTPException(422, str(e)) from e
+    stored = payload.to_stored_dict()
+    with get_db() as conn:
+        upsert_product_default_base(conn, stored)
+    return {"ok": True, "layout": stored, "from_database": True}
+
+
+@router.delete("/dashboard-product-default")
+def admin_delete_dashboard_product_default(session: dict = Depends(require_admin)):
+    """DB-Override entfernen; App fällt auf Code-Standard zurück."""
+    _ = session
+    with get_db() as conn:
+        delete_product_default_override(conn)
+        layout = get_product_default_base_dict(conn)
+    return {"ok": True, "layout": layout, "from_database": False}

backend/routers/app_dashboard.py

@@ -13,11 +13,11 @@ from dashboard_layout_schema import (
     DashboardLayoutPayload,
     coalesce_effective_layout,
     lab_default_layout_dict,
-    product_default_layout_dict,
 )
 from dashboard_widget_entitlements import apply_entitlements_to_layout_dict, widgets_catalog_payload
 from db import get_cursor, get_db
 from routers.profiles import get_pid
+from system_dashboard_product_default import get_product_default_base_dict
 
 router = APIRouter(prefix="/api/app", tags=["app-dashboard-lab"])
 
@@ -51,8 +51,11 @@ def get_dashboard_layout(
     raw = row["dashboard_layout"] if row else None
     custom, effective = coalesce_effective_layout(raw)
     with get_db() as conn:
+        base_product = get_product_default_base_dict(conn)
+        if not custom:
+            effective = base_product
         effective = apply_entitlements_to_layout_dict(effective, pid, conn)
-        product_adj = apply_entitlements_to_layout_dict(product_default_layout_dict(), pid, conn)
+        product_adj = apply_entitlements_to_layout_dict(base_product, pid, conn)
         lab_adj = apply_entitlements_to_layout_dict(lab_default_layout_dict(), pid, conn)
     return {
         "custom": custom,
@@ -107,5 +110,6 @@ def reset_dashboard_layout(
         )
         if cur.rowcount == 0:
             raise HTTPException(404, "Profil nicht gefunden")
-        cleared = apply_entitlements_to_layout_dict(product_default_layout_dict(), pid, conn)
+        base = get_product_default_base_dict(conn)
+        cleared = apply_entitlements_to_layout_dict(base, pid, conn)
     return {"ok": True, "layout": cleared}

backend/system_dashboard_product_default.py

@@ -0,0 +1,77 @@
+"""
+Persistenter System-Standard für die Produkt-Übersicht (Dashboard).
+
+Key in system_config: dashboard_product_default — gültiges DashboardLayoutPayload (JSON).
+"""
+from __future__ import annotations
+
+from typing import Any
+
+from psycopg2.extras import Json
+
+from dashboard_layout_schema import DashboardLayoutPayload, product_default_layout_dict
+from db import get_cursor
+
+SYSTEM_CONFIG_KEY_DASHBOARD_PRODUCT_DEFAULT = "dashboard_product_default"
+
+
+def get_stored_product_default_validated(conn) -> dict[str, Any] | None:
+    """Gültiges Layout aus DB oder None (fehlt/ungültig)."""
+    cur = get_cursor(conn)
+    cur.execute(
+        "SELECT value FROM system_config WHERE key = %s",
+        (SYSTEM_CONFIG_KEY_DASHBOARD_PRODUCT_DEFAULT,),
+    )
+    row = cur.fetchone()
+    if not row or row.get("value") is None:
+        return None
+    raw = row["value"]
+    if isinstance(raw, str):
+        import json
+
+        try:
+            raw = json.loads(raw)
+        except json.JSONDecodeError:
+            return None
+    if not isinstance(raw, dict):
+        return None
+    try:
+        payload = DashboardLayoutPayload.model_validate(
+            {"version": raw.get("version", 1), "widgets": raw.get("widgets", [])}
+        )
+        return payload.to_stored_dict()
+    except Exception:
+        return None
+
+
+def get_product_default_base_dict(conn) -> dict[str, Any]:
+    """Basis-Layout (ohne Entitlements): DB-Override oder Code-Standard."""
+    stored = get_stored_product_default_validated(conn)
+    if stored is not None:
+        return stored
+    return product_default_layout_dict()
+
+
+def upsert_product_default_base(conn, layout: dict[str, Any]) -> dict[str, Any]:
+    payload = DashboardLayoutPayload.model_validate(layout)
+    stored = payload.to_stored_dict()
+    cur = get_cursor(conn)
+    cur.execute(
+        """
+        INSERT INTO system_config (key, value, updated_at)
+        VALUES (%s, %s, CURRENT_TIMESTAMP)
+        ON CONFLICT (key) DO UPDATE SET
+            value = EXCLUDED.value,
+            updated_at = CURRENT_TIMESTAMP
+        """,
+        (SYSTEM_CONFIG_KEY_DASHBOARD_PRODUCT_DEFAULT, Json(stored)),
+    )
+    return stored
+
+
+def delete_product_default_override(conn) -> None:
+    cur = get_cursor(conn)
+    cur.execute(
+        "DELETE FROM system_config WHERE key = %s",
+        (SYSTEM_CONFIG_KEY_DASHBOARD_PRODUCT_DEFAULT,),
+    )

backend/tests/test_system_dashboard_product_default.py

@@ -0,0 +1,45 @@
+from dashboard_layout_schema import DashboardLayoutPayload, product_default_layout_dict
+from dashboard_widget_entitlements import widgets_catalog_admin_payload
+
+
+def test_widgets_catalog_admin_all_allowed():
+    p = widgets_catalog_admin_payload()
+    assert p["catalog_version"] == 1
+    assert len(p["widgets"]) >= 1
+    assert all(w["allowed"] is True for w in p["widgets"])
+
+
+def test_get_product_default_base_uses_code_when_no_row(monkeypatch):
+    from system_dashboard_product_default import get_product_default_base_dict
+
+    class _Cur:
+        def execute(self, *a, **k):
+            pass
+
+        def fetchone(self):
+            return None
+
+    monkeypatch.setattr("system_dashboard_product_default.get_cursor", lambda _c: _Cur())
+    assert get_product_default_base_dict(object()) == product_default_layout_dict()
+
+
+def test_get_product_default_base_uses_db_when_valid(monkeypatch):
+    from system_dashboard_product_default import get_product_default_base_dict
+
+    from widget_catalog import ALLOWED_WIDGET_IDS
+
+    small = {
+        "version": 1,
+        "widgets": [{"id": wid, "enabled": wid == "welcome"} for wid in sorted(ALLOWED_WIDGET_IDS)],
+    }
+    DashboardLayoutPayload.model_validate(small)
+
+    class _Cur:
+        def execute(self, *a, **k):
+            pass
+
+        def fetchone(self):
+            return {"value": small}
+
+    monkeypatch.setattr("system_dashboard_product_default.get_cursor", lambda _c: _Cur())
+    assert get_product_default_base_dict(object()) == small

backend/version.py

@@ -9,7 +9,7 @@ Semantic Versioning: MAJOR.MINOR.PATCH
 
 APP_VERSION = "0.9n"
 BUILD_DATE = "2026-04-05"
-DB_SCHEMA_VERSION = "20260406c"  # Migration 039
+DB_SCHEMA_VERSION = "20260406d"  # Migration 040
 
 MODULE_VERSIONS = {
     "auth": "1.2.0",
@@ -24,20 +24,21 @@ MODULE_VERSIONS = {
     "photos": "1.0.0",
     "insights": "1.3.0",
     "prompts": "1.1.0",
-    "admin": "1.2.0",
+    "admin": "1.3.0",  # Dashboard Produkt-Standard (system_config) + catalog-full
     "stats": "1.0.1",
     "exportdata": "1.1.0",
     "importdata": "1.0.0",
     "membership": "2.1.0",
     "workflow": "0.6.0",  # Phase 4: End Node Template Engine
-    "app_dashboard": "1.9.0",  # product vs lab layout defaults; user dashboard configure page API fields
+    "app_dashboard": "1.10.0",  # Produkt-Standard aus system_config; Response-Form unverändert
 }
 
 CHANGELOG = [
     {
         "version": "0.9n",
-        "date": "2026-04-05",
+        "date": "2026-04-06",
         "changes": [
+            "Admin: Produkt-Dashboard-Systemstandard (Migration 040 system_config, API, UI)",
             "Phase 4: End Node Template Engine",
             "workflow_models.py: EndNodeOutputMode enum (AUTO, TEMPLATE)",
             "workflow_executor.py: execute_end_node() with Jinja2 template rendering",

frontend/src/App.jsx

@@ -241,6 +241,7 @@ function AppShell() {
               <Route path="g/:groupId" element={<AdminGroupHubPage />} />
               <Route path="users" element={<AdminUsersPage />} />
               <Route path="system" element={<AdminSystemPage />} />
+              <Route path="dashboard-product-default" element={<DashboardConfigurePage adminMode />} />
               <Route path="tier-limits" element={<AdminTierLimitsPage/>}/>
               <Route path="features" element={<AdminFeaturesPage/>}/>
               <Route path="tiers" element={<AdminTiersPage/>}/>

frontend/src/config/adminNav.js

@@ -115,6 +115,11 @@ export const ADMIN_GROUPS = [
         label: 'SMTP & Metadaten-Export',
         description: 'SMTP-Status, Test-Mail und Placeholder-Katalog (JSON/ZIP).',
       },
+      {
+        to: '/admin/dashboard-product-default',
+        label: 'Produkt-Dashboard (Standard)',
+        description: 'Globales Standard-Layout der Startseite (DB oder Code-Fallback).',
+      },
     ],
   },
 ]

frontend/src/pages/DashboardConfigurePage.jsx

@@ -32,10 +32,14 @@ function catalogMetaById(catalog) {
   return Object.fromEntries(catalog.widgets.map((w) => [w.id, w]))
 }
 
-export default function DashboardConfigurePage() {
+/**
+ * @param {{ adminMode?: boolean }} [props]
+ */
+export default function DashboardConfigurePage({ adminMode = false } = {}) {
   ensurePilotLabWidgetsRegistered()
 
   const [bundle, setBundle] = useState(null)
+  const [adminFromDatabase, setAdminFromDatabase] = useState(null)
   const [catalog, setCatalog] = useState(null)
   const [layout, setLayout] = useState(null)
   const [addPanelOpen, setAddPanelOpen] = useState(false)
@@ -103,16 +107,29 @@ export default function DashboardConfigurePage() {
   const load = useCallback(async () => {
     setErr(null)
     try {
+      if (adminMode) {
+        const [cat, d] = await Promise.all([
+          api.adminGetWidgetsCatalogFull(),
+          api.adminGetDashboardProductDefault(),
+        ])
+        setCatalog(cat)
+        setBundle({ custom: false, product_default_layout: d.layout })
+        setAdminFromDatabase(!!d.from_database)
+        setChartDaysDraftByWidgetId({})
+        setLayout(normalizeLayoutForEditor(structuredClone(d.layout)))
+      } else {
         const [cat, b] = await Promise.all([api.getAppWidgetsCatalog(), api.getAppDashboardLayout()])
         setCatalog(cat)
         setBundle(b)
+        setAdminFromDatabase(null)
         setChartDaysDraftByWidgetId({})
         const base = b.custom ? b.layout : structuredClone(b.product_default_layout)
         setLayout(normalizeLayoutForEditor(base))
+      }
     } catch (e) {
       setErr(formatFastApiDetail(null, e.message))
     }
-  }, [])
+  }, [adminMode])
 
   useEffect(() => {
     load()
@@ -138,8 +155,13 @@ export default function DashboardConfigurePage() {
     setMsg(null)
     setErr(null)
     try {
+      if (adminMode) {
+        await api.adminPutDashboardProductDefault(toSave)
+        setMsg('System-Standard für die Übersicht wurde gespeichert.')
+      } else {
         await api.putAppDashboardLayout(toSave)
         setMsg('Dein Dashboard wurde gespeichert.')
+      }
       await load()
     } catch (e) {
       setErr(formatFastApiDetail(null, e.message))
@@ -149,15 +171,27 @@ export default function DashboardConfigurePage() {
   }
 
   const resetToSystem = async () => {
-    if (!window.confirm('Dein individuelles Layout löschen und System-Standard wiederherstellen?')) return
+    const ok = adminMode
+      ? window.confirm(
+          'Eintrag in der Datenbank löschen und Layout aus dem Code (widget_catalog) wiederherstellen?'
+        )
+      : window.confirm('Dein individuelles Layout löschen und System-Standard wiederherstellen?')
+    if (!ok) return
     setBusy(true)
     setMsg(null)
     setErr(null)
     try {
+      if (adminMode) {
+        const r = await api.adminDeleteDashboardProductDefault()
+        setChartDaysDraftByWidgetId({})
+        setLayout(normalizeLayoutForEditor(r.layout))
+        setMsg('Code-Standard wiederhergestellt (kein DB-Override mehr).')
+      } else {
         const r = await api.resetAppDashboardLayout()
         setChartDaysDraftByWidgetId({})
         setLayout(normalizeLayoutForEditor(r.layout))
         setMsg('Auf System-Standard zurückgesetzt.')
+      }
       await load()
     } catch (e) {
       setErr(formatFastApiDetail(null, e.message))
@@ -253,21 +287,36 @@ export default function DashboardConfigurePage() {
     <div style={{ paddingBottom: 96, textAlign: 'left', maxWidth: 720, margin: '0 auto' }}>
       <div style={{ marginBottom: 20 }}>
         <Link
-          to="/settings"
+          to={adminMode ? '/admin/g/system' : '/settings'}
           className="btn btn-secondary"
           style={{ display: 'inline-flex', marginBottom: 12, textDecoration: 'none' }}
         >
-          ← Einstellungen
+          {adminMode ? '← Basiseinstellungen (Admin)' : '← Einstellungen'}
         </Link>
         <h1 className="page-title" style={{ display: 'flex', alignItems: 'center', gap: 10 }}>
           <LayoutDashboard size={26} color="var(--accent)" />
-          Übersicht anpassen
+          {adminMode ? 'Produkt-Übersicht: Systemstandard' : 'Übersicht anpassen'}
         </h1>
         <p style={{ fontSize: 13, color: 'var(--text2)', lineHeight: 1.6, marginTop: 8 }}>
-          Kacheln für die Startseite sortieren und entfernen. Neue Kacheln über „Kachel hinzufügen“ – mit Suche direkt
-          im eigenen Fenster, ohne langes Scrollen.
+          {adminMode
+            ? 'Globales Standard-Dashboard für alle Nutzer ohne eigenes Layout. Gespeichert in der Datenbank; mit „Code-Standard wiederherstellen“ wird der Eintrag entfernt und der Fallback aus dem Code genutzt.'
+            : 'Kacheln für die Startseite sortieren und entfernen. Neue Kacheln über „Kachel hinzufügen“ – mit Suche direkt im eigenen Fenster, ohne langes Scrollen.'}
         </p>
-        {!bundle?.custom && (
+        {adminMode && adminFromDatabase != null && (
+          <p style={{ fontSize: 12, color: 'var(--accent)', marginTop: 10, lineHeight: 1.5 }}>
+            {adminFromDatabase ? (
+              <>
+                Aktuell gilt ein <strong>gespeicherter Systemstandard</strong> (Datenbank).
+              </>
+            ) : (
+              <>
+                Es liegt <strong>kein DB-Override</strong> vor — es wird der Code-Standard aus dem Widget-Katalog
+                verwendet.
+              </>
+            )}
+          </p>
+        )}
+        {!adminMode && !bundle?.custom && (
           <p style={{ fontSize: 12, color: 'var(--accent)', marginTop: 10, lineHeight: 1.5 }}>
             Du bearbeitest gerade das <strong>System-Standardlayout</strong>. Mit „Speichern“ legst du deine persönliche
             Version ab.
@@ -457,10 +506,14 @@ export default function DashboardConfigurePage() {
           Speichern
         </button>
         <button type="button" className="btn btn-secondary" disabled={busy} onClick={resetToSystem}>
-          System-Standard wiederherstellen
+          {adminMode ? 'Code-Standard wiederherstellen' : 'System-Standard wiederherstellen'}
         </button>
-        <Link to="/" className="btn btn-secondary" style={{ textDecoration: 'none', textAlign: 'center' }}>
-          Zur Übersicht
+        <Link
+          to={adminMode ? '/admin' : '/'}
+          className="btn btn-secondary"
+          style={{ textDecoration: 'none', textAlign: 'center' }}
+        >
+          {adminMode ? 'Admin-Übersicht' : 'Zur Übersicht'}
         </Link>
       </div>
 

frontend/src/utils/api.js

@@ -76,6 +76,13 @@ export const api = {
   putAppDashboardLayout: (layout) => req('/app/dashboard-layout', jput(layout)),
   resetAppDashboardLayout: () => req('/app/dashboard-layout/reset', { method: 'POST' }),
 
+  adminGetWidgetsCatalogFull: () => req('/admin/widgets/catalog-full'),
+  adminGetDashboardProductDefault: () => req('/admin/dashboard-product-default'),
+  adminPutDashboardProductDefault: (layout) =>
+    req('/admin/dashboard-product-default', jput(layout)),
+  adminDeleteDashboardProductDefault: () =>
+    req('/admin/dashboard-product-default', { method: 'DELETE' }),
+
   // Persönliche Referenzwerte (Profil, historisch)
   listReferenceValueTypes: () => req('/reference-value-types'),
   listReferenceValueMetaEnums: () => req('/reference-value-meta/enums'),