feat: implement Story 2.1 — Owner/Manager Command Center Dashboard

- Rewrite DashboardController with cached role-scoped KPI aggregation
  (Cache::remember, 5-min TTL, Declaration::forUser scope)
- Create StatCard.vue component with CVA status variants and a11y
- Rewrite Dashboard.vue with 4-column KPI grid + urgent declarations table
- Add mise_en_demeure status to DeclarationStatus enum with transitions
- Exclude termine, mise_en_demeure, ferme from dashboard queries
- Set deadline proximity red threshold to ≤5 days
- Add abort(404) for non-member workspace access per architecture
- Fix null-safe client access for soft-deleted clients
- Fix hardcoded routes with Wayfinder type-safe imports
- Fix DashboardProps.stats type to allow null
- Add aria-pressed to StatCard for accessibility
- Install shadcn-vue table component (11 files)
- Add 11 Pest feature tests + 3 mise_en_demeure transition tests
- Fix DeclarationFactory eager workspace creation causing slug collisions
- 196 tests pass, 836 assertions, zero regressions

resources/js/components/ui/table/TableEmpty.vue

@@ -0,0 +1,34 @@
+<script setup lang="ts">
+import type { HTMLAttributes } from "vue"
+import { reactiveOmit } from "@vueuse/core"
+import { cn } from "@/lib/utils"
+import TableCell from "./TableCell.vue"
+import TableRow from "./TableRow.vue"
+
+const props = withDefaults(defineProps<{
+  class?: HTMLAttributes["class"]
+  colspan?: number
+}>(), {
+  colspan: 1,
+})
+
+const delegatedProps = reactiveOmit(props, "class")
+</script>
+
+<template>
+  <TableRow>
+    <TableCell
+      :class="
+        cn(
+          'p-4 whitespace-nowrap align-middle text-sm text-foreground',
+          props.class,
+        )
+      "
+      v-bind="delegatedProps"
+    >
+      <div class="flex items-center justify-center py-10">
+        <slot />
+      </div>
+    </TableCell>
+  </TableRow>
+</template>