feat(db): mesh data model — meshes, members, invites, audit log

- pgSchema "mesh" with 4 tables isolating the peer mesh domain
- Enums: visibility, transport, tier, role
- audit_log is metadata-only (E2E encryption enforced at broker/client)
- Cascade on mesh delete, soft-delete via archivedAt/revokedAt

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

packages/ui/web/src/components/card.tsx

@@ -0,0 +1,61 @@
+import * as React from "react";
+
+import { cn } from "@turbostarter/ui";
+
+export function Card({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      className={cn(
+        "bg-card text-card-foreground isolate overflow-hidden rounded-lg border shadow-xs",
+        className,
+      )}
+      {...props}
+    />
+  );
+}
+
+export function CardHeader({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div className={cn("flex flex-col space-y-2 p-6", className)} {...props} />
+  );
+}
+
+export function CardTitle({ className, ...props }: React.ComponentProps<"h3">) {
+  return (
+    <h3
+      className={cn(
+        "text-2xl leading-none font-semibold tracking-tight",
+        className,
+      )}
+      {...props}
+    />
+  );
+}
+
+export function CardDescription({
+  className,
+  ...props
+}: React.ComponentProps<"p">) {
+  return (
+    <p className={cn("text-muted-foreground text-sm", className)} {...props} />
+  );
+}
+
+export function CardContent({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return <div className={cn("p-6 pt-0 overflow-hidden rounded-[inherit]", className)} {...props} />;
+}
+
+export function CardFooter({
+  className,
+  ...props
+}: React.ComponentProps<"div">) {
+  return (
+    <div className={cn("flex items-center p-6 pt-0", className)} {...props} />
+  );
+}