fix(a11y): Name der Glocke enthält die sichtbare Zahl (Lighthouse label-content-name-mismatch)

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>

ApiCore-Frontend/src/components/notification-bell.spec.tsx

@@ -60,7 +60,7 @@ describe("NotificationBell", () => {
       notification({ id: "n-2", message: "Ohne Ziel", relatedType: "Colony", relatedId: "c-9" }),
     ]);
     renderBell();
-    await userEvent.click(await screen.findByRole("button", { name: "Benachrichtigungen" }));
+    await userEvent.click(await screen.findByRole("button", { name: /^Benachrichtigungen/ }));
 
     const linked = await screen.findByText("Wartezeit-Konflikt bei B3");
     expect(linked.closest("a")).toHaveAttribute("href", "/harvests/h-1");
@@ -76,7 +76,7 @@ describe("NotificationBell", () => {
       notification({ id: "n-2", message: "Schema", link: "https://evil.example" }),
     ]);
     renderBell();
-    await userEvent.click(await screen.findByRole("button", { name: "Benachrichtigungen" }));
+    await userEvent.click(await screen.findByRole("button", { name: /^Benachrichtigungen/ }));
     expect((await screen.findByText("Wartezeit-Konflikt bei B3")).closest("a")).toBeNull();
     expect(screen.getByText("Schema").closest("a")).toBeNull();
   });
@@ -84,7 +84,7 @@ describe("NotificationBell", () => {
   it("hides „Alle gelesen“ when nothing is unread and names the category in words", async () => {
     vi.mocked(fetchNotifications).mockResolvedValue([notification({ read: true })]);
     renderBell();
-    await userEvent.click(await screen.findByRole("button", { name: "Benachrichtigungen" }));
+    await userEvent.click(await screen.findByRole("button", { name: /^Benachrichtigungen/ }));
     expect(await screen.findByText("Wartezeit")).toBeInTheDocument();
     expect(screen.queryByRole("menuitem", { name: /Alle gelesen/ })).not.toBeInTheDocument();
   });
@@ -120,10 +120,12 @@ describe("NotificationBell", () => {
     expect(vi.mocked(toast.error).mock.calls[0][1]).toEqual({ id: "notification-read-error" });
   });
 
-  it("the badge is announced with the unread count, the digit is hidden from readers", async () => {
+  it("the button name carries the visible badge text, the digit itself is hidden from readers", async () => {
     vi.mocked(fetchNotifications).mockResolvedValue([notification({}), notification({ id: "n-2" })]);
     renderBell();
-    expect(await screen.findByText("2 ungelesene Benachrichtigungen")).toHaveClass("sr-only");
+    expect(
+      await screen.findByRole("button", { name: "Benachrichtigungen, 2 ungelesen" }),
+    ).toBeInTheDocument();
     expect(screen.getByText("2", { selector: "[aria-hidden='true']" })).toBeInTheDocument();
   });
 

ApiCore-Frontend/src/components/notification-bell.tsx

@@ -109,20 +109,23 @@ export function NotificationBell() {
             variant="ghost"
             size="icon"
             className="relative"
-            aria-label="Benachrichtigungen"
+            // The name contains the visible badge text (WCAG 2.5.3).
+            aria-label={
+              unreadCount > 0
+                ? `Benachrichtigungen, ${unreadCount > 9 ? "9+" : unreadCount} ungelesen`
+                : "Benachrichtigungen"
+            }
           />
         }
       >
         <Bell className="size-4.5" />
         {unreadCount > 0 ? (
-          <span className="absolute -top-1 -right-1 flex h-5 min-w-5 items-center justify-center rounded-full bg-destructive px-1 text-xs leading-none font-medium text-destructive-foreground">
-            <span aria-hidden="true">
+          <span
+            aria-hidden="true"
+            className="absolute -top-1 -right-1 flex h-5 min-w-5 items-center justify-center rounded-full bg-destructive px-1 text-xs leading-none font-medium text-destructive-foreground"
+          >
             {unreadCount > 9 ? "9+" : unreadCount}
           </span>
-            <span className="sr-only">
-              {unreadCount} ungelesene Benachrichtigungen
-            </span>
-          </span>
         ) : null}
       </DropdownMenuTrigger>
       <DropdownMenuContent align="end" className="w-80">