feat: add one-click nudge system with popover, throttling, and email notifications (Story 3.2)

Add NudgeController with 1-hour throttling per declaration, NudgePopover component
on declarations index and dashboard, shadcn-vue popover primitives, and per-declaration
nudge tracking. Owners/managers can nudge assigned workers with one click.
Includes 10 feature tests covering authorization, throttling, and cache invalidation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

resources/js/pages/Dashboard.vue

@@ -62,6 +62,7 @@ const breadcrumbs: BreadcrumbItem[] = [
 
 const hasWorkspace = computed(() => !!props.workspaceName);
 const showFeed = ref(false);
+const nudgingIds = ref(new Set<number>());
 
 const isWorkerEmpty = computed(
     () =>
@@ -347,7 +348,21 @@ function navigateToDeclaration(declaration: DashboardDeclaration): void {
                                                                     Voir
                                                                 </DropdownMenuItem>
                                                                 <DropdownMenuItem
-                                                                    disabled
+                                                                    v-if="canNudge"
+                                                                    :disabled="nudgingIds.has(declaration.id)"
+                                                                    @click.stop="
+                                                                        if (!nudgingIds.has(declaration.id)) {
+                                                                            nudgingIds.add(declaration.id);
+                                                                            router.post(
+                                                                                declaration.nudgeUrl,
+                                                                                {},
+                                                                                {
+                                                                                    preserveScroll: true,
+                                                                                    onFinish: () => nudgingIds.delete(declaration.id),
+                                                                                },
+                                                                            );
+                                                                        }
+                                                                    "
                                                                 >
                                                                     <Send
                                                                         class="mr-2 h-4 w-4"