Mejoras en el grafo de trazabilidad

- Corregir referencia a colorMode (agregar .value)
- Optimizar renderizado de aristas usando paths SVG
- Mejorar posicionamiento de nodos con agrupación por padre
- Evitar solapamiento de nodos hermanos
- Ajustar cálculo dinámico del ancho del SVG

nuxt4/app/components/lotes/TrazabilidadGraph.vue

@@ -30,7 +30,7 @@
         </defs>
 
         <!-- Grid horizontal y vertical -->
-        <g stroke="#e2e8f0" stroke-width="1" :stroke-opacity="colorMode === 'dark' ? 0.1 : 0.35">
+        <g stroke="#e2e8f0" stroke-width="1" :stroke-opacity="colorMode.value === 'dark' ? 0.1 : 0.35">
           <line
             v-for="depth in depthLines"
             :key="`h-${depth}`"
@@ -52,48 +52,20 @@
         </g>
 
         <!-- Aristas con codo (vertical + horizontal) -->
-        <g stroke="url(#edgeGradient)" stroke-width="2.5" stroke-linecap="round">
-          <template v-for="edge in edges" :key="`${edge.from}-${edge.to}`">
-            <!-- tramo vertical -->
-            <line
-              :x1="edge.fromPos.x"
-              :y1="edge.fromPos.y"
-              :x2="edge.fromPos.x"
-              :y2="edge.midPos.y"
-              class="transition-opacity duration-200"
-              :opacity="0.9"
-            />
-            <!-- tramo horizontal -->
-            <line
-              :x1="edge.fromPos.x"
-              :y1="edge.midPos.y"
-              :x2="edge.toPos.x"
-              :y2="edge.midPos.y"
-              class="transition-opacity duration-200"
-              :opacity="0.9"
-            />
-            <!-- tramo final vertical -->
-            <line
-              :x1="edge.toPos.x"
-              :y1="edge.midPos.y"
-              :x2="edge.toPos.x"
-              :y2="edge.toPos.y"
-              class="transition-opacity duration-200"
-              :opacity="0.9"
-            />
-
-            <!-- tramo diagonal suave (opcional) -->
-            <line
-              v-if="edge.toPos.x !== edge.fromPos.x"
-              :x1="edge.fromPos.x"
-              :y1="edge.midPos.y"
-              :x2="edge.toPos.x"
-              :y2="edge.toPos.y"
-              class="transition-opacity duration-200"
-              :opacity="0.4"
-              stroke-dasharray="4 6"
-            />
-          </template>
+        <g
+          stroke="url(#edgeGradient)"
+          stroke-width="2.5"
+          stroke-linecap="round"
+          stroke-linejoin="round"
+          fill="none"
+        >
+          <path
+            v-for="edge in edges"
+            :key="edge.id"
+            :d="edge.path"
+            class="transition-opacity duration-200"
+            :opacity="0.9"
+          />
         </g>
 
         <!-- Nodos -->
@@ -170,6 +142,10 @@ const paddingX = 80
 const paddingY = 60
 const levelGap = 140
 const nodeBox = { width: 180, height: 64 }
+const horizontalGap = 40
+const siblingSpacing = nodeBox.width + horizontalGap
+const edgePadding = 12
+const minElbowHeight = 24
 const colorMode = useColorMode()
 const bgGradient = computed(() => colorMode.value === 'dark'
   ? 'from-slate-900 to-slate-950'
@@ -203,23 +179,88 @@ const nodes = computed<GraphNode[]>(() => {
   const result: GraphNode[] = []
   const levels = groupedByDepth.value
   if (levels.size === 0) return result
-  const maxCount = Math.max(...Array.from(levels.values()).map((l) => l.length))
 
-  for (const [depth, rows] of Array.from(levels.entries()).sort((a, b) => a[0] - b[0])) {
-    const count = rows.length
-    const width = Math.max(maxCount * nodeBox.width * 1.2, 400)
-    const spacing = width / (count + 1)
-    rows.forEach((row, idx) => {
+  const depthKeys = Array.from(levels.keys()).sort((a, b) => a - b)
+  const minCenterX = paddingX + nodeBox.width / 2
+  const placedByDepth = new Map<number, GraphNode[]>()
+
+  for (const depth of depthKeys) {
+    const rows = [...(levels.get(depth) || [])]
+
+    // Nivel raíz: ubicar centrado y con separación básica
+    if (depth === 0) {
+      rows.forEach((row, idx) => {
+        result.push({
+          id: row.lote_id,
+          label: row.codigo || row.lote_id.slice(0, 8),
+          tipo: row.tipo,
+          cantidad_kg: row.cantidad_kg,
+          depth,
+          x: minCenterX + idx * siblingSpacing,
+          y: paddingY + depth * levelGap,
+        })
+      })
+      placedByDepth.set(depth, result.filter((n) => n.depth === depth))
+      continue
+    }
+
+    const parents = placedByDepth.get(depth - 1) || []
+    const childrenByParent = new Map<string, TrazabilidadRow[]>()
+    const placedIds = new Set<string>()
+
+    for (const row of rows) {
+      const key = row.parent_lote_id || '__orphan__'
+      const list = childrenByParent.get(key) || []
+      list.push(row)
+      childrenByParent.set(key, list)
+    }
+
+    let cursor = minCenterX
+
+    // Ubicar hijos agrupados bajo su padre directo
+    for (const parent of parents) {
+      const children = childrenByParent.get(parent.id)
+      if (!children?.length) continue
+
+      const groupWidth = (children.length - 1) * siblingSpacing
+      let startX = parent.x - groupWidth / 2
+
+      // Evitar solapamiento con grupos previos
+      if (startX < cursor) startX = cursor
+
+      children.forEach((row, idx) => {
+        const x = startX + idx * siblingSpacing
+        result.push({
+          id: row.lote_id,
+          label: row.codigo || row.lote_id.slice(0, 8),
+          tipo: row.tipo,
+          cantidad_kg: row.cantidad_kg,
+          depth,
+          x,
+          y: paddingY + depth * levelGap,
+        })
+        placedIds.add(row.lote_id)
+        cursor = x + siblingSpacing
+      })
+    }
+
+    // Cualquier nodo huérfano (sin padre en el nivel superior) se coloca al final
+    const orphanRows = rows.filter((row) => !placedIds.has(row.lote_id))
+    orphanRows.forEach((row, idx) => {
+      const x = cursor + idx * siblingSpacing
       result.push({
         id: row.lote_id,
         label: row.codigo || row.lote_id.slice(0, 8),
         tipo: row.tipo,
         cantidad_kg: row.cantidad_kg,
         depth,
-        x: paddingX + spacing * (idx + 1),
+        x,
         y: paddingY + depth * levelGap,
       })
+      cursor = x + siblingSpacing
     })
+
+    placedByDepth.set(depth, result.filter((n) => n.depth === depth))
   }
 
   return result
@@ -235,11 +276,11 @@ const nodeById = computed(() => {
 
 const edges = computed(() => {
   const list: {
+    id: string
     from: string
     to: string
-    fromPos: { x: number; y: number }
-    toPos: { x: number; y: number }
-    midPos: { x: number; y: number }
+    path: string
+    midY: number
   }[] = []
 
   for (const row of props.historial) {
@@ -247,12 +288,20 @@ const edges = computed(() => {
     const fromNode = nodeById.value.get(row.parent_lote_id)
     const toNode = nodeById.value.get(row.lote_id)
     if (fromNode && toNode) {
+      const fromY = fromNode.y + nodeBox.height / 2 + edgePadding
+      const toY = toNode.y - nodeBox.height / 2 - edgePadding
+      const rawMidY = (fromY + toY) / 2
+      const midY = Math.max(
+        fromY + minElbowHeight,
+        Math.min(toY - minElbowHeight, rawMidY),
+      )
+
       list.push({
+        id: `${fromNode.id}-${toNode.id}`,
         from: fromNode.id,
         to: toNode.id,
-        fromPos: { x: fromNode.x, y: fromNode.y + nodeBox.height / 2 },
-        toPos: { x: toNode.x, y: toNode.y - nodeBox.height / 2 },
-        midPos: { x: fromNode.x, y: (fromNode.y + toNode.y) / 2 },
+        midY,
+        path: `M ${fromNode.x} ${fromY} L ${fromNode.x} ${midY} L ${toNode.x} ${midY} L ${toNode.x} ${toY}`,
       })
     }
   }
@@ -262,8 +311,11 @@ const edges = computed(() => {
 
 const svgWidth = computed(() => {
   if (!nodes.value.length) return 600
-  const maxX = Math.max(...nodes.value.map((n) => n.x + nodeBox.width / 2), 600)
-  return maxX + paddingX
+  const xs = nodes.value.map((n) => n.x)
+  const minX = Math.min(...xs)
+  const maxX = Math.max(...xs)
+  const width = (maxX - minX) + paddingX * 2 + nodeBox.width
+  return Math.max(width, 600)
 })
 
 const svgHeight = computed(() => {