feat: Refactor PilotVizPage and widget registry for improved layout and rendering

- Replaced the previous widget retrieval method with a new layout-based approach in PilotVizPage.
- Introduced a PilotVizAdminCard for layout configuration and management.
- Updated widget definitions in the registry to include new components and default order.
- Enhanced user feedback for widget visibility with a message when no widgets are active.

frontend/src/components/pilot/GoalsSnapshotWidget.jsx

@@ -0,0 +1,76 @@
+import { useState, useEffect } from 'react'
+import { Link } from 'react-router-dom'
+import { Target } from 'lucide-react'
+import { api } from '../../utils/api'
+
+export default function GoalsSnapshotWidget() {
+  const [count, setCount] = useState(null)
+  const [loading, setLoading] = useState(true)
+  const [err, setErr] = useState(null)
+
+  useEffect(() => {
+    let cancelled = false
+    ;(async () => {
+      try {
+        const list = await api.listGoals()
+        if (!cancelled) {
+          setCount(Array.isArray(list) ? list.length : 0)
+          setErr(null)
+        }
+      } catch (e) {
+        if (!cancelled) {
+          setErr(e.message || 'Laden fehlgeschlagen')
+          setCount(null)
+        }
+      } finally {
+        if (!cancelled) setLoading(false)
+      }
+    })()
+    return () => {
+      cancelled = true
+    }
+  }, [])
+
+  if (loading) {
+    return (
+      <div style={{ padding: 16, textAlign: 'center' }}>
+        <div className="spinner" />
+      </div>
+    )
+  }
+  if (err) {
+    return <div style={{ fontSize: 13, color: 'var(--danger)' }}>{err}</div>
+  }
+
+  return (
+    <div style={{ display: 'flex', alignItems: 'flex-start', gap: 14, flexWrap: 'wrap' }}>
+      <div
+        style={{
+          width: 44,
+          height: 44,
+          borderRadius: 12,
+          background: 'var(--accent-light)',
+          display: 'flex',
+          alignItems: 'center',
+          justifyContent: 'center',
+          flexShrink: 0,
+        }}
+      >
+        <Target size={22} color="var(--accent)" />
+      </div>
+      <div style={{ flex: '1 1 200px' }}>
+        <div style={{ fontSize: 15, fontWeight: 600, color: 'var(--text1)' }}>
+          {count === 0
+            ? 'Noch keine strategischen Ziele'
+            : `${count} ${count === 1 ? 'Ziel' : 'Ziele'} aktiv`}
+        </div>
+        <p style={{ fontSize: 13, color: 'var(--text2)', margin: '8px 0 0', lineHeight: 1.5 }}>
+          Focus Areas und Fortschritt – wie auf dem Haupt-Dashboard, hier als Pilot-Widget.
+        </p>
+        <Link to="/goals" className="btn btn-secondary" style={{ marginTop: 12, display: 'inline-block', fontSize: 12, padding: '6px 12px', textDecoration: 'none' }}>
+          Zu den Zielen →
+        </Link>
+      </div>
+    </div>
+  )
+}

frontend/src/components/pilot/PilotVizAdminCard.jsx

@@ -0,0 +1,128 @@
+import { Settings2, RotateCcw, ChevronUp, ChevronDown } from 'lucide-react'
+import { PILOT_WIDGET_DEFS, PILOT_WIDGET_IDS_DEFAULT_ORDER } from '../../pilot/widgetRegistry'
+import { resetPilotLayout, savePilotLayout } from '../../pilot/pilotLayoutStorage'
+
+/**
+ * Pilot: lokale Konfiguration (Ein/Aus, Reihenfolge). Kein Admin-Recht nötig.
+ */
+export default function PilotVizAdminCard({ layout, onLayoutChange }) {
+  const persist = (next) => {
+    savePilotLayout(next)
+    onLayoutChange(next)
+  }
+
+  const move = (index, dir) => {
+    const nextOrder = [...layout.order]
+    const j = index + dir
+    if (j < 0 || j >= nextOrder.length) return
+    ;[nextOrder[index], nextOrder[j]] = [nextOrder[j], nextOrder[index]]
+    persist({ ...layout, order: nextOrder })
+  }
+
+  const toggle = (id) => {
+    persist({
+      ...layout,
+      enabled: { ...layout.enabled, [id]: !layout.enabled[id] },
+    })
+  }
+
+  const handleReset = () => {
+    onLayoutChange(resetPilotLayout())
+  }
+
+  return (
+    <section
+      className="card section-gap"
+      style={{
+        borderStyle: 'solid',
+        borderColor: 'var(--accent)',
+        borderWidth: 1,
+        background: 'var(--surface)',
+      }}
+    >
+      <div className="card-title" style={{ display: 'flex', alignItems: 'center', gap: 8 }}>
+        <Settings2 size={18} color="var(--accent)" />
+        Widget-Konfiguration (Pilot)
+      </div>
+      <p style={{ fontSize: 12, color: 'var(--text2)', marginTop: 4, marginBottom: 14, lineHeight: 1.5 }}>
+        Sichtbarkeit und Reihenfolge steuern. Wird nur <strong>lokal in diesem Browser</strong> gespeichert
+        (<code style={{ fontSize: 11 }}>localStorage</code>) – gut zum Ausprobieren vor einer serverseitigen
+        Profil-Konfiguration.
+      </p>
+
+      <ul style={{ listStyle: 'none', margin: 0, padding: 0, display: 'flex', flexDirection: 'column', gap: 8 }}>
+        {layout.order.map((id, index) => {
+          const def = PILOT_WIDGET_DEFS[id]
+          if (!def) return null
+          const on = !!layout.enabled[id]
+          return (
+            <li
+              key={id}
+              style={{
+                display: 'flex',
+                alignItems: 'center',
+                gap: 8,
+                flexWrap: 'wrap',
+                padding: '10px 12px',
+                borderRadius: 10,
+                background: on ? 'var(--surface2)' : 'var(--surface)',
+                border: '1px solid var(--border)',
+                opacity: on ? 1 : 0.72,
+              }}
+            >
+              <div style={{ display: 'flex', flexDirection: 'column', gap: 2 }}>
+                <button
+                  type="button"
+                  className="btn btn-secondary"
+                  style={{ padding: '4px 8px', minWidth: 36 }}
+                  title="Nach oben"
+                  disabled={index === 0}
+                  onClick={() => move(index, -1)}
+                >
+                  <ChevronUp size={16} />
+                </button>
+                <button
+                  type="button"
+                  className="btn btn-secondary"
+                  style={{ padding: '4px 8px', minWidth: 36 }}
+                  title="Nach unten"
+                  disabled={index === layout.order.length - 1}
+                  onClick={() => move(index, 1)}
+                >
+                  <ChevronDown size={16} />
+                </button>
+              </div>
+              <div style={{ flex: 1, minWidth: 140 }}>
+                <div style={{ fontSize: 13, fontWeight: 600, color: 'var(--text1)' }}>{def.title}</div>
+                <code style={{ fontSize: 10, color: 'var(--text3)' }}>{id}</code>
+              </div>
+              <label
+                style={{
+                  display: 'flex',
+                  alignItems: 'center',
+                  gap: 8,
+                  fontSize: 13,
+                  cursor: 'pointer',
+                  userSelect: 'none',
+                }}
+              >
+                <input type="checkbox" checked={on} onChange={() => toggle(id)} />
+                sichtbar
+              </label>
+            </li>
+          )
+        })}
+      </ul>
+
+      <div style={{ marginTop: 14, display: 'flex', flexWrap: 'wrap', gap: 8, alignItems: 'center' }}>
+        <button type="button" className="btn btn-secondary" onClick={handleReset} style={{ display: 'inline-flex', alignItems: 'center', gap: 8 }}>
+          <RotateCcw size={14} />
+          Standard wiederherstellen
+        </button>
+        <span style={{ fontSize: 11, color: 'var(--text3)' }}>
+          Standard-Reihenfolge: {PILOT_WIDGET_IDS_DEFAULT_ORDER.join(' → ')}
+        </span>
+      </div>
+    </section>
+  )
+}

frontend/src/components/pilot/WeightKpiWidget.jsx

@@ -0,0 +1,87 @@
+import { useState, useEffect } from 'react'
+import { Link } from 'react-router-dom'
+import dayjs from 'dayjs'
+import { api } from '../../utils/api'
+
+export default function WeightKpiWidget() {
+  const [stats, setStats] = useState(null)
+  const [loading, setLoading] = useState(true)
+  const [err, setErr] = useState(null)
+
+  useEffect(() => {
+    let cancelled = false
+    ;(async () => {
+      try {
+        const s = await api.weightStats()
+        if (!cancelled) {
+          setStats(s)
+          setErr(null)
+        }
+      } catch (e) {
+        if (!cancelled) {
+          setErr(e.message || 'Laden fehlgeschlagen')
+          setStats(null)
+        }
+      } finally {
+        if (!cancelled) setLoading(false)
+      }
+    })()
+    return () => {
+      cancelled = true
+    }
+  }, [])
+
+  if (loading) {
+    return (
+      <div style={{ padding: 16, textAlign: 'center' }}>
+        <div className="spinner" />
+      </div>
+    )
+  }
+  if (err) {
+    return <div style={{ fontSize: 13, color: 'var(--danger)' }}>{err}</div>
+  }
+  const latest = stats?.latest
+  const prev = stats?.prev
+  if (!latest) {
+    return (
+      <p style={{ fontSize: 13, color: 'var(--text2)', margin: 0 }}>
+        Noch kein Gewicht erfasst.{' '}
+        <Link to="/weight" style={{ color: 'var(--accent)' }}>
+          Zur Eingabe
+        </Link>
+      </p>
+    )
+  }
+
+  const delta =
+    prev && typeof latest.weight === 'number' && typeof prev.weight === 'number'
+      ? Math.round((latest.weight - prev.weight) * 10) / 10
+      : null
+  const deltaColor =
+    delta == null ? 'var(--text3)' : delta < 0 ? 'var(--accent)' : delta > 0 ? 'var(--warn)' : 'var(--text3)'
+
+  return (
+    <div style={{ display: 'flex', flexWrap: 'wrap', gap: 16, alignItems: 'flex-end' }}>
+      <div>
+        <div style={{ fontSize: 11, color: 'var(--text3)', marginBottom: 4 }}>Aktuelles Gewicht</div>
+        <div style={{ fontSize: 26, fontWeight: 800, color: '#378ADD', lineHeight: 1 }}>
+          {latest.weight}
+          <span style={{ fontSize: 14, fontWeight: 600, color: 'var(--text2)', marginLeft: 4 }}>kg</span>
+        </div>
+        <div style={{ fontSize: 12, color: 'var(--text3)', marginTop: 6 }}>
+          Stand {dayjs(latest.date).format('DD.MM.YYYY')}
+        </div>
+      </div>
+      {delta != null && (
+        <div style={{ fontSize: 13, fontWeight: 600, color: deltaColor }}>
+          {delta > 0 ? '+' : ''}
+          {delta} kg <span style={{ fontWeight: 400, color: 'var(--text3)' }}>ggü. Vorher</span>
+        </div>
+      )}
+      <Link to="/history" className="btn btn-secondary" style={{ fontSize: 12, padding: '6px 12px', textDecoration: 'none' }}>
+        Verlauf →
+      </Link>
+    </div>
+  )
+}

frontend/src/pages/PilotVizPage.jsx

@@ -1,13 +1,16 @@
+import { useState } from 'react'
 import { FlaskConical } from 'lucide-react'
 import { Link } from 'react-router-dom'
-import { getPilotWidgetsInOrder } from '../pilot/widgetRegistry'
+import { resolvePilotWidgetsForRender } from '../pilot/widgetRegistry'
+import { loadPilotLayout } from '../pilot/pilotLayoutStorage'
+import PilotVizAdminCard from '../components/pilot/PilotVizAdminCard'
 
 /**
  * Pilot: Widget-Schicht (Layer 3b) parallel zum produktiven Dashboard.
- * Daten für Referenzwerte: Layer 1 (backend/data_layer/reference_values.py) → API.
  */
 export default function PilotVizPage() {
-  const widgets = getPilotWidgetsInOrder()
+  const [layout, setLayout] = useState(() => loadPilotLayout())
+  const widgets = resolvePilotWidgetsForRender(layout)
 
   return (
     <div style={{ paddingBottom: 96, textAlign: 'left', maxWidth: 900, margin: '0 auto' }}>
@@ -24,26 +27,34 @@ export default function PilotVizPage() {
           Pilot: Visualisierungs-Module
         </h1>
         <p style={{ fontSize: 14, color: 'var(--text2)', lineHeight: 1.6, marginTop: 8 }}>
-          Testumgebung für die zukünftige Widget-Registry. Die produktive Übersicht und der Verlauf bleiben
-          unverändert. Referenzwerte-Summary wird über die gleiche API geladen wie in der Erfassungs-UI, angeboten
-          durch den Data Layer (Layer 1).
+          Testumgebung für die Widget-Registry. Konfiguration unten; produktive Übersicht und Verlauf sind unverändert.
         </p>
       </div>
 
-      {widgets.map((def) => {
-        const { Component } = def
-        return (
-          <section key={def.id} className="card section-gap" style={{ overflow: 'hidden' }}>
-            <div className="card-title">{def.title}</div>
-            {def.description && (
-              <p style={{ fontSize: 13, color: 'var(--text2)', marginTop: 4, marginBottom: 14, lineHeight: 1.5 }}>
-                {def.description}
-              </p>
-            )}
-            <Component />
-          </section>
-        )
-      })}
+      <PilotVizAdminCard layout={layout} onLayoutChange={setLayout} />
+
+      {widgets.length === 0 ? (
+        <div className="card section-gap" style={{ textAlign: 'center', padding: 24 }}>
+          <p style={{ fontSize: 14, color: 'var(--text2)', margin: 0 }}>
+            Keine Widgets sichtbar. Aktiviere mindestens eines in der <strong>Widget-Konfiguration</strong> oben.
+          </p>
+        </div>
+      ) : (
+        widgets.map((def) => {
+          const { Component } = def
+          return (
+            <section key={def.id} className="card section-gap" style={{ overflow: 'hidden' }}>
+              <div className="card-title">{def.title}</div>
+              {def.description && (
+                <p style={{ fontSize: 13, color: 'var(--text2)', marginTop: 4, marginBottom: 14, lineHeight: 1.5 }}>
+                  {def.description}
+                </p>
+              )}
+              <Component />
+            </section>
+          )
+        })
+      )}
     </div>
   )
 }

frontend/src/pilot/pilotLayoutStorage.js

@@ -0,0 +1,52 @@
+/**
+ * Pilot-Layout: nur lokal (localStorage), kein Server.
+ * Dient zum Testen von Sichtbarkeit und Reihenfolge vor einer DB-Lösung.
+ */
+
+import { PILOT_WIDGET_DEFS, PILOT_WIDGET_IDS_DEFAULT_ORDER } from './widgetRegistry'
+
+const STORAGE_KEY = 'mitai_pilot_viz_layout_v1'
+
+function defaultLayout() {
+  const order = [...PILOT_WIDGET_IDS_DEFAULT_ORDER]
+  const enabled = Object.fromEntries(order.map((id) => [id, true]))
+  return { version: 1, order, enabled}
+}
+
+function mergeWithRegistry(saved) {
+  if (!saved || typeof saved !== 'object') return defaultLayout()
+  const known = new Set(Object.keys(PILOT_WIDGET_DEFS))
+  let order = Array.isArray(saved.order) ? saved.order.filter((id) => known.has(id)) : []
+  for (const id of PILOT_WIDGET_IDS_DEFAULT_ORDER) {
+    if (!order.includes(id)) order.push(id)
+  }
+  const enabled = { ...defaultLayout().enabled, ...(saved.enabled && typeof saved.enabled === 'object' ? saved.enabled : {}) }
+  for (const id of Object.keys(PILOT_WIDGET_DEFS)) {
+    if (typeof enabled[id] !== 'boolean') enabled[id] = true
+  }
+  return { version: 1, order, enabled }
+}
+
+export function loadPilotLayout() {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    if (!raw) return defaultLayout()
+    return mergeWithRegistry(JSON.parse(raw))
+  } catch {
+    return defaultLayout()
+  }
+}
+
+export function savePilotLayout(layout) {
+  try {
+    localStorage.setItem(STORAGE_KEY, JSON.stringify(layout))
+  } catch {
+    /* ignore quota */
+  }
+}
+
+export function resetPilotLayout() {
+  const d = defaultLayout()
+  savePilotLayout(d)
+  return d
+}

frontend/src/pilot/widgetRegistry.js

@@ -1,20 +1,38 @@
 import ReferenceValuesSummaryWidget from '../components/pilot/ReferenceValuesSummaryWidget'
+import GoalsSnapshotWidget from '../components/pilot/GoalsSnapshotWidget'
+import WeightKpiWidget from '../components/pilot/WeightKpiWidget'
 
 /**
- * Pilot: konfigurierbare Widget-Reihenfolge (Layer 3b-Vorspiel).
- * Nur für /pilot/viz – produktives Dashboard bleibt unverändert.
+ * Pilot: Widget-Registry (Layer 3b-Vorspiel).
+ * Reihenfolge-Default: PILOT_WIDGET_IDS_DEFAULT_ORDER
  */
-export const PILOT_WIDGET_ORDER = ['reference_values_summary']
+export const PILOT_WIDGET_IDS_DEFAULT_ORDER = ['weight_kpi', 'goals_teaser', 'reference_values_summary']
 
 export const PILOT_WIDGET_DEFS = {
+  weight_kpi: {
+    id: 'weight_kpi',
+    title: 'Gewicht (KPI)',
+    description: 'Letzter Eintrag und Delta zum vorherigen Messwert (API weight/stats).',
+    Component: WeightKpiWidget,
+  },
+  goals_teaser: {
+    id: 'goals_teaser',
+    title: 'Strategische Ziele',
+    description: 'Anzahl aktiver Ziele, Link zur Ziele-Seite (API goals/list).',
+    Component: GoalsSnapshotWidget,
+  },
   reference_values_summary: {
     id: 'reference_values_summary',
     title: 'Referenzwerte',
-    description: 'Aktuellste Kennwerte pro Typ (Daten via Layer 1 → bestehende API).',
+    description: 'Aktuellste Kennwerte pro Typ (Layer 1 → /profile-reference-values/summary).',
     Component: ReferenceValuesSummaryWidget,
   },
 }
 
-export function getPilotWidgetsInOrder() {
-  return PILOT_WIDGET_ORDER.map((id) => PILOT_WIDGET_DEFS[id]).filter(Boolean)
+/** Sichtbare Widgets in gespeicherter Reihenfolge (für Render). */
+export function resolvePilotWidgetsForRender(layout) {
+  if (!layout?.order) return []
+  return layout.order
+    .filter((id) => layout.enabled[id] && PILOT_WIDGET_DEFS[id])
+    .map((id) => PILOT_WIDGET_DEFS[id])
 }