feat(2.0): Phase 1 — Engine + Routing (Herzstueck)

Backend-Services: fit/caps/sources (portiert), discover (live HF + Fit +
Caps + ranked recommendation), llama-swap write/register + groups (Ko-
Residenz swap:false), LiteLLM-Gateway-Config + gateway-Service (model:auto +
Fallbacks). Router: discover/fit/register/groups/routing; health zeigt
gateway_reachable. Frontend: Modelle&Routing mit Caps-Chips, Fit-Badges,
Discover-Tab (live), Routing-View.

Lokal verifiziert: Backend-Smoke (alle Endpunkte) + Frontend-Build +
Browser (Shell, Discover, Caps/Fit). Box-Verifikation offen.

Docs: README + docs/STATUS.md (Phasen-Tracker + Resume-Guide).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/App.tsx

@@ -3,6 +3,7 @@ import { Command as CommandIcon } from "lucide-react"
 import { NAV, type ViewId } from "@/nav"
 import { CommandPalette } from "@/components/CommandPalette"
 import { ModelsView } from "@/views/ModelsView"
+import { RoutingView } from "@/views/RoutingView"
 import { Placeholder } from "@/views/Placeholder"
 import { api, type Health } from "@/lib/api"
 import { cn } from "@/lib/utils"
@@ -88,7 +89,10 @@ export default function App() {
 
         <main className="flex-1 overflow-y-auto p-6">
           {view === "models" && <ModelsView />}
-          {view !== "models" && <Placeholder title={active.label} hint={active.hint} />}
+          {view === "routing" && <RoutingView />}
+          {view !== "models" && view !== "routing" && (
+            <Placeholder title={active.label} hint={active.hint} />
+          )}
         </main>
       </div>
     </div>