feat: add notification center with bell dropdown, full page, and workspace scoping (Story 3.3)

Enhance NotificationDropdown with type-specific icons, French description builder,
click-to-navigate with mark-as-read, and "Voir toutes les notifications" link.
Add full notifications page at /notifications with pagination (25/page), individual
mark-as-read, and empty state. Includes code review fixes: workspace-scoped unread
count and dropdown items, race condition fix (mark-as-read before navigate),
efficient markAllAsRead via direct update, deleted declaration URL handling,
and per-workspace cache keys. 7 new feature tests.

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

app/Http/Controllers/DeclarationMentionController.php

@@ -52,7 +52,7 @@ class DeclarationMentionController extends Controller
             $validated['message'],
         ));
 
-        Cache::forget("user:{$targetUser->id}:unread_notifications");
+        Cache::forget("user:{$targetUser->id}:workspace:{$workspace->id}:unread_notifications");
 
         return back()->with('flash', ['type' => 'success', 'message' => 'Notification envoyée.']);
     }

app/Http/Controllers/FolderMentionController.php

@@ -52,7 +52,7 @@ class FolderMentionController extends Controller
             $validated['message'],
         ));
 
-        Cache::forget("user:{$targetUser->id}:unread_notifications");
+        Cache::forget("user:{$targetUser->id}:workspace:{$workspace->id}:unread_notifications");
 
         return back()->with('flash', ['type' => 'success', 'message' => 'Notification envoyée.']);
     }

app/Http/Controllers/NotificationController.php

@@ -2,12 +2,61 @@
 
 namespace App\Http\Controllers;
 
+use App\Concerns\HasWorkspaceScope;
+use App\Models\Declaration;
+use App\Models\User;
 use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Cache;
+use Inertia\Inertia;
+use Inertia\Response;
 
 class NotificationController extends Controller
 {
+    use HasWorkspaceScope;
+
+    public function index(Request $request): Response
+    {
+        $workspace = $this->currentWorkspace();
+
+        $notifications = $request->user()
+            ->notifications()
+            ->whereJsonContains('data->workspace_id', $workspace->id)
+            ->latest()
+            ->paginate(25);
+
+        $declarationIds = collect($notifications->items())->pluck('data.declaration_id')->filter()->unique()->values();
+        $senderIds = collect($notifications->items())->pluck('data.sender_id')->filter()->unique()->values();
+
+        $declarations = Declaration::whereIn('id', $declarationIds)->pluck('title', 'id');
+        $senders = User::whereIn('id', $senderIds)->pluck('name', 'id');
+
+        $notifications->through(function ($n) use ($declarations, $senders) {
+            $data = $n->data;
+            $declarationId = $data['declaration_id'] ?? null;
+            $senderId = $data['sender_id'] ?? null;
+
+            $declarationExists = $declarationId && isset($declarations[$declarationId]);
+            $data['declaration_title'] = $declarationExists ? $declarations[$declarationId] : null;
+            $data['sender_name'] = $senderId ? ($senders[$senderId] ?? null) : null;
+            $data['url'] = $declarationExists ? route('declarations.show', $declarationId) : null;
+
+            return [
+                'id' => $n->id,
+                'type' => class_basename($n->type),
+                'data' => $data,
+                'read_at' => $n->read_at?->toISOString(),
+                'created_at' => $n->created_at->diffForHumans(),
+            ];
+        });
+
+        return Inertia::render('notifications/Index', [
+            'notifications' => $notifications,
+            'markAllReadUrl' => route('notifications.readAll'),
+            'readUrl' => route('notifications.read', ['id' => '__ID__']),
+        ]);
+    }
+
     public function markAsRead(Request $request, string $id): RedirectResponse
     {
         $request->user()
@@ -16,16 +65,22 @@ class NotificationController extends Controller
             ->firstOrFail()
             ->markAsRead();
 
-        Cache::forget("user:{$request->user()->id}:unread_notifications");
+        $workspaceId = $request->session()->get('current_workspace_id');
+        Cache::forget("user:{$request->user()->id}:workspace:{$workspaceId}:unread_notifications");
 
         return back();
     }
 
     public function markAllAsRead(Request $request): RedirectResponse
     {
-        $request->user()->unreadNotifications->markAsRead();
+        $workspace = $this->currentWorkspace();
 
-        Cache::forget("user:{$request->user()->id}:unread_notifications");
+        $request->user()
+            ->unreadNotifications()
+            ->whereJsonContains('data->workspace_id', $workspace->id)
+            ->update(['read_at' => now()]);
+
+        Cache::forget("user:{$request->user()->id}:workspace:{$workspace->id}:unread_notifications");
 
         return back();
     }

app/Http/Middleware/HandleInertiaRequests.php

@@ -2,6 +2,8 @@
 
 namespace App\Http\Middleware;
 
+use App\Models\Declaration;
+use App\Models\User;
 use App\Models\WorkspaceUser;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Cache;
@@ -81,26 +83,52 @@ class HandleInertiaRequests extends Middleware
             ],
             'sidebarOpen' => ! $request->hasCookie('sidebar_state') || $request->cookie('sidebar_state') === 'true',
             'userNotifications' => [
-                'unread_count' => $user ? Cache::remember(
-                    "user:{$user->id}:unread_notifications",
+                'unread_count' => $user && $currentWorkspace ? Cache::remember(
+                    "user:{$user->id}:workspace:{$currentWorkspace['id']}:unread_notifications",
                     60,
-                    fn () => $user->unreadNotifications()->count()
+                    fn () => $user->unreadNotifications()
+                        ->whereJsonContains('data->workspace_id', $currentWorkspace['id'])
+                        ->count()
                 ) : 0,
                 'readUrl' => fn () => $user ? route('notifications.read', ['id' => '__ID__']) : null,
                 'readAllUrl' => fn () => $user ? route('notifications.readAll') : null,
-                'items' => Inertia::defer(function () use ($user) {
-                    if (! $user) {
+                'notificationsUrl' => fn () => $user ? route('notifications.index') : null,
+                'items' => Inertia::defer(function () use ($user, $currentWorkspace) {
+                    if (! $user || ! $currentWorkspace) {
                         return [];
                     }
 
                     try {
-                        return $user->notifications()->latest()->take(10)->get()->map(fn ($n) => [
-                            'id' => $n->id,
-                            'type' => class_basename($n->type),
-                            'data' => $n->data,
-                            'read_at' => $n->read_at?->toISOString(),
-                            'created_at' => $n->created_at->diffForHumans(),
-                        ])->all();
+                        $notifications = $user->notifications()
+                            ->whereJsonContains('data->workspace_id', $currentWorkspace['id'])
+                            ->latest()
+                            ->take(10)
+                            ->get();
+
+                        $declarationIds = $notifications->pluck('data.declaration_id')->filter()->unique()->values();
+                        $senderIds = $notifications->pluck('data.sender_id')->filter()->unique()->values();
+
+                        $declarations = Declaration::whereIn('id', $declarationIds)->pluck('title', 'id');
+                        $senders = User::whereIn('id', $senderIds)->pluck('name', 'id');
+
+                        return $notifications->map(function ($n) use ($declarations, $senders) {
+                            $data = $n->data;
+                            $declarationId = $data['declaration_id'] ?? null;
+                            $senderId = $data['sender_id'] ?? null;
+
+                            $declarationExists = $declarationId && isset($declarations[$declarationId]);
+                            $data['declaration_title'] = $declarationExists ? $declarations[$declarationId] : null;
+                            $data['sender_name'] = $senderId ? ($senders[$senderId] ?? null) : null;
+                            $data['url'] = $declarationExists ? route('declarations.show', $declarationId) : null;
+
+                            return [
+                                'id' => $n->id,
+                                'type' => class_basename($n->type),
+                                'data' => $data,
+                                'read_at' => $n->read_at?->toISOString(),
+                                'created_at' => $n->created_at->diffForHumans(),
+                            ];
+                        })->all();
                     } catch (\Throwable) {
                         return [];
                     }