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>

apps/web/src/modules/common/ai/thread/controls/index.tsx

@@ -0,0 +1,25 @@
+import { cn } from "@turbostarter/ui";
+
+import { ThreadMessageCopy } from "./copy";
+import { ThreadMessageLikes } from "./likes";
+
+import type { UIMessage } from "@ai-sdk/react";
+
+interface ControlsProps {
+  message: UIMessage;
+}
+
+export const Controls = ({ message }: ControlsProps) => {
+  return (
+    <div
+      className={cn(
+        "bg-background start-0 -ml-4 flex w-max items-center gap-px rounded-lg px-2 pb-2 text-xs opacity-0 transition-opacity group-focus-within:opacity-100 group-hover:opacity-100 md:start-3",
+      )}
+    >
+      {message.parts.some(
+        (part) => part.type === "text" && part.text.length > 0,
+      ) && <ThreadMessageCopy message={message} />}
+      <ThreadMessageLikes />
+    </div>
+  );
+};