Phase 4a: shadcn form primitives + case inline edit

Add dialog/select/textarea/label/progress/sonner components and wire
a Toaster into Providers. New zod schemas in lib/schemas/case.ts
mirror CaseCreateRequest/CaseUpdateRequest and feed react-hook-form
validation.

CaseEditDialog on the case detail Actions tab posts PUT /api/cases/{n}
with optimistic cache patching via useUpdateCase, showing toast
feedback on success/error.

shadcn's <Form> registry entry skipped at init (missing from the
nova preset); the dialog uses RHF directly against the same Input/
Textarea/Select primitives.

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

web-ui/src/lib/providers.tsx

@@ -2,6 +2,7 @@
 
 import { useState, type ReactNode } from "react";
 import { QueryClientProvider } from "@tanstack/react-query";
+import { Toaster } from "@/components/ui/sonner";
 import { makeQueryClient } from "@/lib/api/client";
 
 /**
@@ -12,6 +13,9 @@ import { makeQueryClient } from "@/lib/api/client";
 export function Providers({ children }: { children: ReactNode }) {
   const [queryClient] = useState(() => makeQueryClient());
   return (
-    <QueryClientProvider client={queryClient}>{children}</QueryClientProvider>
+    <QueryClientProvider client={queryClient}>
+      {children}
+      <Toaster position="top-left" richColors closeButton dir="rtl" />
+    </QueryClientProvider>
   );
 }