feat(app): unify KPI tiles with AppKpiCard

Introduce AppKpiCard for consistent metric layout (icon + value, title,
subtitle row) and default VCard chrome without mixed border-shadow accents.
Use on organisation overview (all primary icons, equal stretch row) and
home dashboard. Regenerate component type declarations.

Made-with: Cursor

apps/app/src/components/AppKpiCard.vue

@@ -0,0 +1,70 @@
+<script setup lang="ts">
+/**
+ * Standaard KPI-tegel: icon + waarde, titel, optionele ondertitel.
+ * Zelfde structuur als event-statistieken; kaart-chrome is altijd gelijk (geen gekleurde rand tenzij borderAccent).
+ */
+type BorderAccent = 'primary' | 'warning' | 'info' | 'success' | 'error'
+
+const props = withDefaults(
+  defineProps<{
+    icon: string
+    iconColor?: string
+    value: string | number
+    title: string
+    /** Ondertitel; ontbreekt er een, dan blijft één regelhoogte gereserveerd voor gelijke tegelhoogtes. */
+    subtitle?: string
+    clickable?: boolean
+    borderAccent?: BorderAccent
+  }>(),
+  {
+    iconColor: 'primary',
+    clickable: false,
+  },
+)
+
+const emit = defineEmits<{
+  click: []
+}>()
+
+function onClick() {
+  if (props.clickable)
+    emit('click')
+}
+</script>
+
+<template>
+  <VCard
+    :class="[
+      'flex-grow-1 w-100 d-flex flex-column',
+      clickable ? 'cursor-pointer' : '',
+      borderAccent ? `card-border-shadow-${borderAccent}` : '',
+    ]"
+    @click="onClick"
+  >
+    <VCardText class="flex-grow-1 d-flex flex-column">
+      <div class="d-flex align-center mb-1">
+        <VAvatar
+          :color="iconColor"
+          variant="tonal"
+          size="44"
+          rounded
+          class="me-4"
+        >
+          <VIcon
+            :icon="icon"
+            size="28"
+          />
+        </VAvatar>
+        <h4 class="text-h4 mb-0">
+          {{ value }}
+        </h4>
+      </div>
+      <p class="mb-1">
+        {{ title }}
+      </p>
+      <p class="mb-0 text-body-secondary text-sm">
+        {{ subtitle ?? '\u00a0' }}
+      </p>
+    </VCardText>
+  </VCard>
+</template>