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>

app/Http/Controllers/DeclarationController.php

@@ -76,11 +76,13 @@ class DeclarationController extends Controller
                 'title' => $declaration->title,
                 'type' => $declaration->type->value,
                 'client_name' => $declaration->client->company_name,
+                'assignee_name' => $declaration->assignee?->name,
                 'status' => $declaration->status->value,
                 'due_date' => $declaration->due_date?->format('Y-m-d'),
                 'showUrl' => route('declarations.show', $declaration),
                 'editUrl' => route('declarations.edit', $declaration),
                 'destroyUrl' => route('declarations.destroy', $declaration),
+                'nudgeUrl' => ! $isWorker ? route('declarations.nudge', $declaration) : null,
             ]);
 
         return Inertia::render('declarations/Index', [
@@ -90,6 +92,7 @@ class DeclarationController extends Controller
             'canCreate' => ! $isWorker,
             'canEdit' => ! $isWorker,
             'canDelete' => ! $isWorker,
+            'canNudge' => ! $isWorker,
         ]);
     }