chore(release): v1.4.15

Bumps version to 1.4.15 and adds the corresponding CHANGELOG entry
covering backup completeness, achievements UI, onboarding tour,
doctor-report v2, auto-deploy on GHCR push, empty-states sweep,
notification + integration status UI, AI hallucination guardrails,
mobile UX fixes, and the BD-Zielbereich percentage fix.

Includes the formatting drift left over by the v1.4.15 development
phases (Prettier sweep on touched files) and a typecheck fix in
`dashboard-layout.test.ts` so `pnpm typecheck`, `pnpm lint`,
`pnpm format:check`, `pnpm test`, and `pnpm test:integration` all
pass green on the release tag.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/layout/auth-shell.tsx

@@ -124,7 +124,7 @@ export function AuthShell({ children }: { children: React.ReactNode }) {
       */}
       <a
         href="#main-content"
-        className="bg-primary text-primary-foreground fixed top-2 left-2 z-[100] -translate-y-full rounded-md px-4 py-2 text-sm font-medium opacity-0 transition-transform pointer-events-none focus:translate-y-0 focus:opacity-100 focus:pointer-events-auto"
+        className="bg-primary text-primary-foreground pointer-events-none fixed top-2 left-2 z-[100] -translate-y-full rounded-md px-4 py-2 text-sm font-medium opacity-0 transition-transform focus:pointer-events-auto focus:translate-y-0 focus:opacity-100"
       >
         {t("nav.skipToContent")}
       </a>

src/components/layout/sidebar-nav.tsx

@@ -74,7 +74,12 @@ const navItems = [
     icon: Lightbulb,
     tourId: "nav-insights",
   },
-  { href: "/targets", tKey: "nav.targets", icon: Target, tourId: "nav-targets" },
+  {
+    href: "/targets",
+    tKey: "nav.targets",
+    icon: Target,
+    tourId: "nav-targets",
+  },
   {
     href: "/achievements",
     tKey: "nav.achievements",