AP1.15a: Zielzustands-Designer mit Pan/Zoom und Kanten im Plan-Tab.

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/GateGraphDesigner.jsx

@@ -0,0 +1,528 @@
+import { useCallback, useEffect, useMemo, useRef, useState } from 'react'
+import { useNavigate } from 'react-router-dom'
+import {
+  addRoadmapItemDependency,
+  deleteRoadmapDependency,
+  listInitiativeRoadmapDependencies,
+} from '../api/roadmap.js'
+import { ROADMAP_ITEM_TYPE_LABELS } from '../constants/status.js'
+import { gatePath } from '../utils/routes.js'
+import { computeGateGraphLayout } from '../plan/gateGraphLayout.js'
+import {
+  applyManualGatePositions,
+  clampDesignerZoom,
+  clearManualGatePositions,
+  DESIGNER_ZOOM_STEP,
+  loadManualGatePositions,
+  storeManualGatePositions,
+} from '../plan/gateGraphDesigner.js'
+import { LoadingState } from './LoadingState.jsx'
+import { ErrorState } from './ErrorState.jsx'
+import { EmptyState } from './EmptyState.jsx'
+
+const EDGE_TYPE_LABELS = {
+  requires: 'Voraussetzung',
+  blocks: 'Blockiert',
+  related: 'Bezug',
+}
+
+const CONNECT_HINTS = {
+  requires: 'Schritt 1: Voraussetzung wählen · Schritt 2: abhängiges Gate',
+  blocks: 'Schritt 1: Blocker wählen · Schritt 2: geblocktes Gate',
+  related: 'Schritt 1: erstes Gate · Schritt 2: zweites Gate',
+}
+
+function edgePath(edge) {
+  const midY = (edge.y1 + edge.y2) / 2
+  return `M ${edge.x1} ${edge.y1} C ${edge.x1} ${midY}, ${edge.x2} ${midY}, ${edge.x2} ${edge.y2}`
+}
+
+function truncateTitle(title, max = 28) {
+  if (!title || title.length <= max) return title || 'Gate'
+  return `${title.slice(0, max - 1)}…`
+}
+
+/**
+ * @param {DOMRect} rect
+ * @param {{ x: number, y: number }} pan
+ * @param {number} zoom
+ * @param {number} clientX
+ * @param {number} clientY
+ */
+function clientToGraphPoint(rect, pan, zoom, clientX, clientY) {
+  return {
+    x: (clientX - rect.left - pan.x) / zoom,
+    y: (clientY - rect.top - pan.y) / zoom,
+  }
+}
+
+export function GateGraphDesigner({
+  initiativeId,
+  items,
+  canManage = false,
+  onGraphChanged,
+}) {
+  const navigate = useNavigate()
+  const viewportRef = useRef(null)
+  const [dependencies, setDependencies] = useState([])
+  const [manualPositions, setManualPositions] = useState(() =>
+    loadManualGatePositions(initiativeId),
+  )
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState(null)
+  const [busy, setBusy] = useState(false)
+  const [tool, setTool] = useState('pan')
+  const [edgeType, setEdgeType] = useState('requires')
+  const [connectFromId, setConnectFromId] = useState(null)
+  const [selectedEdgeId, setSelectedEdgeId] = useState(null)
+  const [pan, setPan] = useState({ x: 24, y: 24 })
+  const [zoom, setZoom] = useState(1)
+  const [draggingNodeId, setDraggingNodeId] = useState(null)
+  const dragOffsetRef = useRef({ x: 0, y: 0 })
+  const panStartRef = useRef(null)
+
+  const reloadDependencies = useCallback(async () => {
+    if (!initiativeId) {
+      setDependencies([])
+      return
+    }
+    const data = await listInitiativeRoadmapDependencies(initiativeId)
+    setDependencies(Array.isArray(data) ? data : [])
+  }, [initiativeId])
+
+  useEffect(() => {
+    if (!initiativeId) {
+      setDependencies([])
+      setLoading(false)
+      return undefined
+    }
+    let cancelled = false
+    setLoading(true)
+    setError(null)
+    reloadDependencies()
+      .catch((err) => {
+        if (!cancelled) {
+          setError(err?.message || 'Abhängigkeiten konnten nicht geladen werden.')
+        }
+      })
+      .finally(() => {
+        if (!cancelled) setLoading(false)
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [initiativeId, reloadDependencies])
+
+  useEffect(() => {
+    setManualPositions(loadManualGatePositions(initiativeId))
+    setConnectFromId(null)
+    setSelectedEdgeId(null)
+  }, [initiativeId])
+
+  const baseLayout = useMemo(
+    () => computeGateGraphLayout(items, dependencies),
+    [items, dependencies],
+  )
+
+  const layout = useMemo(
+    () => applyManualGatePositions(baseLayout, manualPositions),
+    [baseLayout, manualPositions],
+  )
+
+  async function notifyGraphChanged() {
+    await reloadDependencies()
+    onGraphChanged?.()
+  }
+
+  async function handleCreateEdge(fromId, toId) {
+    if (!fromId || !toId || fromId === toId) return
+    setBusy(true)
+    setError(null)
+    try {
+      let fromItemId = fromId
+      let toItemId = toId
+      if (edgeType === 'requires') {
+        fromItemId = toId
+        toItemId = fromId
+      }
+      await addRoadmapItemDependency(fromItemId, {
+        to_item_id: toItemId,
+        dependency_type: edgeType,
+      })
+      setConnectFromId(null)
+      await notifyGraphChanged()
+    } catch (err) {
+      setError(err?.message || 'Kante konnte nicht angelegt werden.')
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  async function handleDeleteEdge(edgeId) {
+    if (!edgeId || !canManage) return
+    setBusy(true)
+    setError(null)
+    try {
+      await deleteRoadmapDependency(edgeId)
+      setSelectedEdgeId(null)
+      await notifyGraphChanged()
+    } catch (err) {
+      setError(err?.message || 'Kante konnte nicht entfernt werden.')
+    } finally {
+      setBusy(false)
+    }
+  }
+
+  function handleNodeClick(nodeId, event) {
+    event.stopPropagation()
+    if (busy) return
+
+    if (tool === 'connect' && canManage) {
+      if (!connectFromId) {
+        setConnectFromId(nodeId)
+        setSelectedEdgeId(null)
+        return
+      }
+      if (connectFromId === nodeId) {
+        setConnectFromId(null)
+        return
+      }
+      handleCreateEdge(connectFromId, nodeId)
+      return
+    }
+
+    if (event.detail === 2 && tool === 'pan') {
+      navigate(gatePath(nodeId))
+    }
+  }
+
+  function handleNodePointerDown(node, event) {
+    if (!canManage || tool !== 'pan' || event.button !== 0) return
+    event.stopPropagation()
+    const rect = viewportRef.current?.getBoundingClientRect()
+    if (!rect) return
+    const point = clientToGraphPoint(rect, pan, zoom, event.clientX, event.clientY)
+    dragOffsetRef.current = { x: point.x - node.x, y: point.y - node.y }
+    setDraggingNodeId(node.id)
+    setSelectedEdgeId(null)
+  }
+
+  function handleViewportPointerDown(event) {
+    if (event.button !== 0) return
+    const target = event.target
+    if (target.closest?.('.gate-map-view__node')) return
+    if (target.classList?.contains('gate-map-view__edge')) return
+
+    setSelectedEdgeId(null)
+    if (tool === 'connect') {
+      setConnectFromId(null)
+      return
+    }
+    if (tool !== 'pan' || draggingNodeId) return
+
+    panStartRef.current = {
+      startX: event.clientX,
+      startY: event.clientY,
+      panX: pan.x,
+      panY: pan.y,
+    }
+  }
+
+  useEffect(() => {
+    function handlePointerMove(event) {
+      if (draggingNodeId && canManage) {
+        const rect = viewportRef.current?.getBoundingClientRect()
+        if (!rect) return
+        const point = clientToGraphPoint(rect, pan, zoom, event.clientX, event.clientY)
+        const nextX = Math.max(0, point.x - dragOffsetRef.current.x)
+        const nextY = Math.max(0, point.y - dragOffsetRef.current.y)
+        setManualPositions((prev) => {
+          const next = { ...prev, [draggingNodeId]: { x: nextX, y: nextY } }
+          storeManualGatePositions(initiativeId, next)
+          return next
+        })
+        return
+      }
+
+      if (panStartRef.current) {
+        const deltaX = event.clientX - panStartRef.current.startX
+        const deltaY = event.clientY - panStartRef.current.startY
+        setPan({
+          x: panStartRef.current.panX + deltaX,
+          y: panStartRef.current.panY + deltaY,
+        })
+      }
+    }
+
+    function handlePointerUp() {
+      setDraggingNodeId(null)
+      panStartRef.current = null
+    }
+
+    window.addEventListener('pointermove', handlePointerMove)
+    window.addEventListener('pointerup', handlePointerUp)
+    return () => {
+      window.removeEventListener('pointermove', handlePointerMove)
+      window.removeEventListener('pointerup', handlePointerUp)
+    }
+  }, [canManage, draggingNodeId, initiativeId, pan, zoom])
+
+  function handleWheel(event) {
+    event.preventDefault()
+    const direction = event.deltaY > 0 ? -1 : 1
+    setZoom((current) => clampDesignerZoom(current + direction * DESIGNER_ZOOM_STEP))
+  }
+
+  function handleResetLayout() {
+    clearManualGatePositions(initiativeId)
+    setManualPositions({})
+    setPan({ x: 24, y: 24 })
+    setZoom(1)
+  }
+
+  if (!items.length) {
+    return (
+      <EmptyState message="Noch kein Plan — strukturiere das Vorhaben in überprüfbare Roadmap-Elemente." />
+    )
+  }
+
+  if (loading) {
+    return <LoadingState message="Zielzustands-Designer wird geladen …" />
+  }
+
+  return (
+    <section className="card gate-graph-designer">
+      <div className="section-header">
+        <div>
+          <h2>Zielzustände (Designer)</h2>
+          <p className="section-lead muted">
+            Zielzustands-Graph modellieren — Pan/Zoom, Knoten verschieben, Kanten verbinden. Verify
+            und Kriterien bleiben auf der Gate-Detailseite.
+          </p>
+        </div>
+      </div>
+
+      {error && <ErrorState message={error} />}
+
+      <div className="gate-graph-designer__toolbar">
+        <div className="gate-graph-designer__tool-group" role="group" aria-label="Werkzeug">
+          <button
+            type="button"
+            className={
+              'btn btn-secondary btn-sm' +
+              (tool === 'pan' ? ' gate-graph-designer__tool--active' : '')
+            }
+            aria-pressed={tool === 'pan'}
+            onClick={() => {
+              setTool('pan')
+              setConnectFromId(null)
+            }}
+          >
+            Verschieben
+          </button>
+          {canManage && (
+            <button
+              type="button"
+              className={
+                'btn btn-secondary btn-sm' +
+                (tool === 'connect' ? ' gate-graph-designer__tool--active' : '')
+              }
+              aria-pressed={tool === 'connect'}
+              disabled={busy}
+              onClick={() => {
+                setTool('connect')
+                setConnectFromId(null)
+                setSelectedEdgeId(null)
+              }}
+            >
+              Verbinden
+            </button>
+          )}
+        </div>
+
+        {canManage && tool === 'connect' && (
+          <label className="gate-graph-designer__edge-type">
+            <span className="muted">Kantentyp</span>
+            <select
+              value={edgeType}
+              disabled={busy}
+              onChange={(event) => {
+                setEdgeType(event.target.value)
+                setConnectFromId(null)
+              }}
+            >
+              {Object.entries(EDGE_TYPE_LABELS).map(([value, label]) => (
+                <option key={value} value={value}>
+                  {label}
+                </option>
+              ))}
+            </select>
+          </label>
+        )}
+
+        <div className="gate-graph-designer__zoom-group" role="group" aria-label="Zoom">
+          <button
+            type="button"
+            className="btn btn-secondary btn-sm"
+            aria-label="Verkleinern"
+            onClick={() => setZoom((current) => clampDesignerZoom(current - DESIGNER_ZOOM_STEP))}
+          >
+            −
+          </button>
+          <span className="gate-graph-designer__zoom-label muted">{Math.round(zoom * 100)}%</span>
+          <button
+            type="button"
+            className="btn btn-secondary btn-sm"
+            aria-label="Vergrößern"
+            onClick={() => setZoom((current) => clampDesignerZoom(current + DESIGNER_ZOOM_STEP))}
+          >
+            +
+          </button>
+        </div>
+
+        {canManage && selectedEdgeId && (
+          <button
+            type="button"
+            className="btn btn-secondary btn-sm"
+            disabled={busy}
+            onClick={() => handleDeleteEdge(selectedEdgeId)}
+          >
+            Kante entfernen
+          </button>
+        )}
+
+        {canManage && (
+          <button
+            type="button"
+            className="btn btn-secondary btn-sm"
+            disabled={busy}
+            onClick={handleResetLayout}
+          >
+            Layout zurücksetzen
+          </button>
+        )}
+      </div>
+
+      {tool === 'connect' && canManage && (
+        <p className="gate-graph-designer__hint muted">
+          {CONNECT_HINTS[edgeType] || 'Zwei Gates nacheinander anklicken.'}
+          {connectFromId ? ' — erstes Gate gewählt, zweites wählen.' : ''}
+        </p>
+      )}
+
+      {!canManage && (
+        <p className="gate-graph-designer__hint muted">
+          Nur Ansicht — zum Modellieren fehlt die Berechtigung „Plan verwalten“.
+        </p>
+      )}
+
+      <div
+        ref={viewportRef}
+        className="gate-graph-designer__viewport"
+        onPointerDown={handleViewportPointerDown}
+        onWheel={handleWheel}
+      >
+        <svg
+          className="gate-graph-designer__canvas"
+          width={layout.width}
+          height={layout.height}
+          role="img"
+          aria-label="Zielzustands-Designer"
+          style={{
+            transform: `translate(${pan.x}px, ${pan.y}px) scale(${zoom})`,
+            transformOrigin: '0 0',
+          }}
+        >
+          <defs>
+            <marker
+              id="gate-designer-arrow-requires"
+              markerWidth="8"
+              markerHeight="8"
+              refX="6"
+              refY="4"
+              orient="auto"
+            >
+              <path
+                d="M0,0 L8,4 L0,8 Z"
+                className="gate-map-view__arrow gate-map-view__arrow--requires"
+              />
+            </marker>
+            <marker
+              id="gate-designer-arrow-blocks"
+              markerWidth="8"
+              markerHeight="8"
+              refX="6"
+              refY="4"
+              orient="auto"
+            >
+              <path
+                d="M0,0 L8,4 L0,8 Z"
+                className="gate-map-view__arrow gate-map-view__arrow--blocks"
+              />
+            </marker>
+          </defs>
+
+          {layout.edges.map((edge) => (
+            <path
+              key={edge.id}
+              d={edgePath(edge)}
+              className={
+                'gate-map-view__edge gate-map-view__edge--' +
+                edge.dependency_type +
+                (selectedEdgeId === edge.id ? ' gate-graph-designer__edge--selected' : '')
+              }
+              markerEnd={
+                edge.dependency_type === 'related'
+                  ? undefined
+                  : `url(#gate-designer-arrow-${edge.dependency_type})`
+              }
+              onClick={(event) => {
+                event.stopPropagation()
+                if (canManage) setSelectedEdgeId(edge.id)
+              }}
+            />
+          ))}
+
+          {layout.nodes.map((node) => {
+            const item = node.item
+            const isConnectSource = connectFromId === node.id
+            const nodeClass =
+              'gate-map-view__node gate-map-view__node--' +
+              (item.status || 'planned') +
+              (isConnectSource ? ' gate-graph-designer__node--connect-source' : '') +
+              (draggingNodeId === node.id ? ' gate-graph-designer__node--dragging' : '')
+            return (
+              <g
+                key={node.id}
+                className={nodeClass}
+                transform={`translate(${node.x}, ${node.y})`}
+                onPointerDown={(event) => handleNodePointerDown(node, event)}
+                onClick={(event) => handleNodeClick(node.id, event)}
+              >
+                <rect
+                  className="gate-map-view__node-box"
+                  width={node.width}
+                  height={node.height}
+                  rx="8"
+                  ry="8"
+                />
+                <text className="gate-map-view__node-title" x="12" y="28">
+                  {truncateTitle(item.title)}
+                </text>
+                <text className="gate-map-view__node-meta" x="12" y="50">
+                  {ROADMAP_ITEM_TYPE_LABELS[item.item_type] || item.item_type || 'Gate'}
+                </text>
+              </g>
+            )
+          })}
+        </svg>
+      </div>
+
+      {canManage && (
+        <p className="muted gate-graph-designer__footer-hint">
+          Doppelklick auf Gate öffnet Details. Layout-Positionen werden lokal gespeichert.
+        </p>
+      )}
+    </section>
+  )
+}

frontend/src/components/GateMapView.jsx

@@ -86,8 +86,8 @@ export function GateMapView({ initiativeId, items, graphState: graphStateProp })
         <div>
           <h2>Zielzustände (Graph)</h2>
           <p className="section-lead muted">
-            Read-only Übersicht der Gate-Abhängigkeiten — Kanten auf der Gate-Detailseite pflegen,
-            Verify und Kriterien dort ebenfalls.
+            Read-only Übersicht der Gate-Abhängigkeiten — im Designer modellieren oder auf der
+            Gate-Detailseite Kanten pflegen; Verify und Kriterien dort.
           </p>
         </div>
       </div>
@@ -197,8 +197,8 @@ export function GateMapView({ initiativeId, items, graphState: graphStateProp })
 
       {dependencies.length === 0 && (
         <p className="muted gate-map-view__hint">
-          Noch keine Kanten — auf der Gate-Detailseite unter „Abhängigkeiten“ anlegen; ohne Kanten
-          gelten Gates nach Reihenfolge.
+          Noch keine Kanten — im Designer verbinden oder auf der Gate-Detailseite unter
+          „Abhängigkeiten“ anlegen; ohne Kanten gelten Gates nach Reihenfolge.
         </p>
       )}
     </section>

frontend/src/components/GatesPlanPanel.jsx

@@ -1,6 +1,7 @@
 import { useEffect, useState } from 'react'
 import { RoadmapPlanSection } from './RoadmapPlanSection.jsx'
 import { GateMapView } from './GateMapView.jsx'
+import { GateGraphDesigner } from './GateGraphDesigner.jsx'
 import { resolveGatesViewMode, storeGatesViewMode } from '../plan/gateGraphLayout.js'
 import { listInitiativeRoadmapGraphState } from '../api/roadmap.js'
 
@@ -43,6 +44,13 @@ export function GatesPlanPanel({
     storeGatesViewMode(initiativeId, mode)
   }
 
+  function refreshGraphState() {
+    if (!initiativeId) return
+    listInitiativeRoadmapGraphState(initiativeId)
+      .then((data) => setGraphState(data || null))
+      .catch(() => setGraphState(null))
+  }
+
   const fulfillmentPct =
     graphState?.initiative_fulfillment_ratio != null
       ? Math.round(graphState.initiative_fulfillment_ratio * 100)
@@ -87,6 +95,18 @@ export function GatesPlanPanel({
         >
           Graph
         </button>
+        <button
+          type="button"
+          role="tab"
+          aria-selected={viewMode === 'designer'}
+          className={
+            'gates-plan-panel__tab' +
+            (viewMode === 'designer' ? ' gates-plan-panel__tab--active' : '')
+          }
+          onClick={() => handleViewChange('designer')}
+        >
+          Designer
+        </button>
       </div>
 
       {viewMode === 'list' ? (
@@ -100,8 +120,15 @@ export function GatesPlanPanel({
           busy={busy}
           graphState={graphState}
         />
-      ) : (
+      ) : viewMode === 'graph' ? (
         <GateMapView initiativeId={initiativeId} items={items} graphState={graphState} />
+      ) : (
+        <GateGraphDesigner
+          initiativeId={initiativeId}
+          items={items}
+          canManage={canManage}
+          onGraphChanged={refreshGraphState}
+        />
       )}
     </div>
   )

frontend/src/plan/gateGraphDesigner.js

@@ -0,0 +1,100 @@
+/** Designer-Hilfen für Zielzustands-Graph (AP1.15a) — kein Workflow. */
+
+export const DESIGNER_MIN_ZOOM = 0.5
+export const DESIGNER_MAX_ZOOM = 2
+export const DESIGNER_ZOOM_STEP = 0.1
+
+/**
+ * @param {number} zoom
+ * @returns {number}
+ */
+export function clampDesignerZoom(zoom) {
+  return Math.min(DESIGNER_MAX_ZOOM, Math.max(DESIGNER_MIN_ZOOM, zoom))
+}
+
+/**
+ * @param {string} initiativeId
+ * @returns {Record<string, { x: number, y: number }>}
+ */
+export function loadManualGatePositions(initiativeId) {
+  if (typeof window === 'undefined' || !initiativeId) return {}
+  try {
+    const raw = window.localStorage.getItem(`kairo.plan.gateLayout:${initiativeId}`)
+    if (!raw) return {}
+    const parsed = JSON.parse(raw)
+    return parsed && typeof parsed === 'object' ? parsed : {}
+  } catch {
+    return {}
+  }
+}
+
+/**
+ * @param {string} initiativeId
+ * @param {Record<string, { x: number, y: number }>} positions
+ */
+export function storeManualGatePositions(initiativeId, positions) {
+  if (typeof window === 'undefined' || !initiativeId) return
+  window.localStorage.setItem(
+    `kairo.plan.gateLayout:${initiativeId}`,
+    JSON.stringify(positions),
+  )
+}
+
+/**
+ * @param {string} initiativeId
+ */
+export function clearManualGatePositions(initiativeId) {
+  if (typeof window === 'undefined' || !initiativeId) return
+  window.localStorage.removeItem(`kairo.plan.gateLayout:${initiativeId}`)
+}
+
+/**
+ * @param {{ nodes: Array<{ id: string, x: number, y: number, width: number, height: number, item: object }> }} layout
+ * @param {Record<string, { x: number, y: number }>} manualPositions
+ */
+export function applyManualGatePositions(layout, manualPositions) {
+  if (!layout?.nodes?.length || !manualPositions) return layout
+
+  const nodes = layout.nodes.map((node) => {
+    const manual = manualPositions[node.id]
+    if (!manual) return node
+    return { ...node, x: manual.x, y: manual.y }
+  })
+
+  const nodeById = new Map(nodes.map((node) => [node.id, node]))
+  const edges = (layout.edges || []).map((edge) => {
+    const sourceNode =
+      edge.dependency_type === 'requires'
+        ? nodeById.get(edge.toId || edge.from_item_id)
+        : nodeById.get(edge.fromId || edge.from_item_id)
+    const targetNode =
+      edge.dependency_type === 'requires'
+        ? nodeById.get(edge.fromId || edge.to_item_id)
+        : nodeById.get(edge.toId || edge.to_item_id)
+    if (!sourceNode || !targetNode) return edge
+
+    const center = (node) => ({
+      x: node.x + node.width / 2,
+      y: node.y + node.height / 2,
+    })
+
+    if (edge.dependency_type === 'related') {
+      const from = center(sourceNode)
+      const to = center(targetNode)
+      return { ...edge, x1: from.x, y1: from.y, x2: to.x, y2: to.y }
+    }
+
+    return {
+      ...edge,
+      x1: sourceNode.x + sourceNode.width / 2,
+      y1: sourceNode.y + sourceNode.height,
+      x2: targetNode.x + targetNode.width / 2,
+      y2: targetNode.y,
+    }
+  })
+
+  const width = Math.max(...nodes.map((node) => node.x + node.width), 0) + 32
+  const height = Math.max(...nodes.map((node) => node.y + node.height), 0) + 32
+
+  return { ...layout, nodes, edges, width, height }
+}

frontend/src/plan/gateGraphDesigner.test.js

@@ -0,0 +1,28 @@
+import { describe, expect, it } from 'vitest'
+import {
+  applyManualGatePositions,
+  clampDesignerZoom,
+} from './gateGraphDesigner.js'
+
+describe('gateGraphDesigner', () => {
+  it('clamps zoom range', () => {
+    expect(clampDesignerZoom(0.1)).toBe(0.5)
+    expect(clampDesignerZoom(3)).toBe(2)
+    expect(clampDesignerZoom(1)).toBe(1)
+  })
+
+  it('applies manual node positions', () => {
+    const layout = {
+      nodes: [
+        { id: 'a', x: 10, y: 20, width: 100, height: 72, item: {} },
+        { id: 'b', x: 200, y: 20, width: 100, height: 72, item: {} },
+      ],
+      edges: [],
+      width: 400,
+      height: 200,
+    }
+    const merged = applyManualGatePositions(layout, { a: { x: 50, y: 80 } })
+    expect(merged.nodes.find((n) => n.id === 'a').x).toBe(50)
+    expect(merged.nodes.find((n) => n.id === 'b').x).toBe(200)
+  })
+})

frontend/src/plan/gateGraphLayout.js

@@ -171,12 +171,12 @@ export function computeGateGraphLayout(items, dependencies) {
 /**
  * @param {string} initiativeId
  * @param {number} itemCount
- * @returns {'list' | 'graph'}
+ * @returns {'list' | 'graph' | 'designer'}
  */
 export function resolveGatesViewMode(initiativeId, itemCount) {
   if (typeof window !== 'undefined' && initiativeId) {
     const stored = window.localStorage.getItem(`kairo.plan.gates.view:${initiativeId}`)
-    if (stored === 'list' || stored === 'graph') {
+    if (stored === 'list' || stored === 'graph' || stored === 'designer') {
       return stored
     }
   }
@@ -185,7 +185,7 @@ export function resolveGatesViewMode(initiativeId, itemCount) {
 
 /**
  * @param {string} initiativeId
- * @param {'list' | 'graph'} mode
+ * @param {'list' | 'graph' | 'designer'} mode
  */
 export function storeGatesViewMode(initiativeId, mode) {
   if (typeof window !== 'undefined' && initiativeId) {

frontend/src/styles/components.css

@@ -1874,6 +1874,85 @@
   font-size: 0.875rem;
 }
 
+.gate-graph-designer__toolbar {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  gap: 0.5rem 0.75rem;
+  margin-bottom: 0.75rem;
+}
+
+.gate-graph-designer__tool-group,
+.gate-graph-designer__zoom-group {
+  display: flex;
+  align-items: center;
+  gap: 0.35rem;
+}
+
+.gate-graph-designer__tool--active {
+  border-color: var(--jk-border-strong, #c5ced8);
+  background: var(--jk-surface-muted, #eef2f6);
+}
+
+.gate-graph-designer__edge-type {
+  display: flex;
+  align-items: center;
+  gap: 0.35rem;
+  font-size: 0.875rem;
+}
+
+.gate-graph-designer__zoom-label {
+  min-width: 3rem;
+  text-align: center;
+  font-size: 0.875rem;
+}
+
+.gate-graph-designer__hint,
+.gate-graph-designer__footer-hint {
+  margin: 0 0 0.75rem;
+  font-size: 0.875rem;
+}
+
+.gate-graph-designer__viewport {
+  position: relative;
+  min-height: 420px;
+  max-height: 70vh;
+  overflow: hidden;
+  border: 1px solid var(--jk-border, #dde3ea);
+  border-radius: 8px;
+  background: var(--jk-surface-muted, #f6f8fa);
+  cursor: grab;
+  touch-action: none;
+}
+
+.gate-graph-designer__viewport:active {
+  cursor: grabbing;
+}
+
+.gate-graph-designer__canvas {
+  display: block;
+  pointer-events: all;
+}
+
+.gate-graph-designer__edge--selected {
+  stroke-width: 3;
+  filter: drop-shadow(0 0 2px rgba(0, 0, 0, 0.2));
+}
+
+.gate-graph-designer__node--connect-source .gate-map-view__node-box {
+  stroke: var(--jk-accent, #2563eb);
+  stroke-width: 2;
+}
+
+.gate-graph-designer__node--dragging {
+  opacity: 0.92;
+}
+
+.gate-graph-designer .gate-map-view__edge {
+  pointer-events: stroke;
+  cursor: pointer;
+}
+
 .gate-dependencies-section {
   margin: 1.25rem 0;
   padding-top: 1rem;