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/chat/layout/examples.tsx

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+"use client";
+
+import { motion } from "motion/react";
+import { memo } from "react";
+
+import { useTranslation } from "@turbostarter/i18n";
+import { cn } from "@turbostarter/ui";
+import { Button } from "@turbostarter/ui-web/button";
+import { Icons } from "@turbostarter/ui-web/icons";
+
+import { useComposer } from "~/modules/chat/composer/hooks/use-composer";
+
+const examples = [
+  {
+    icon: Icons.FileText,
+    label: "chat.example.summarize.label",
+    prompt: "chat.example.summarize.prompt",
+  },
+  {
+    icon: Icons.ChartNoAxesColumn,
+    label: "chat.example.analyze.label",
+    prompt: "chat.example.analyze.prompt",
+  },
+  {
+    icon: Icons.Code,
+    label: "chat.example.code.label",
+    prompt: "chat.example.code.prompt",
+  },
+  {
+    icon: Icons.Zap,
+    label: "chat.example.brainstorm.label",
+    prompt: "chat.example.brainstorm.prompt",
+  },
+  {
+    icon: Icons.PackageOpen,
+    label: "chat.example.surprise.label",
+    prompt: "chat.example.surprise.prompt",
+  },
+] as const;
+
+interface ExamplesProps {
+  readonly id?: string;
+  readonly className?: string;
+}
+
+export const Examples = memo<ExamplesProps>(({ className, id }) => {
+  const { t } = useTranslation("ai");
+  const { onSubmit } = useComposer({ id });
+
+  return (
+    <div
+      className={cn(
+        "flex w-full flex-row flex-wrap items-center justify-center gap-2 px-3 @sm:gap-2",
+        className,
+      )}
+    >
+      {examples.map(({ icon: Icon, label, prompt }, index) => (
+        <motion.div
+          animate={{ opacity: 1, y: 0, filter: "blur(0px)" }}
+          initial={{ opacity: 0, y: 3, filter: "blur(4px)" }}
+          transition={{ delay: index * 0.1 }}
+          key={label}
+        >
+          <Button
+            variant="outline"
+            className="text-muted-foreground gap-2 rounded-full"
+            onClick={() => onSubmit(t(prompt))}
+          >
+            <Icon className="size-4" />
+            <span>{t(label)}</span>
+          </Button>
+        </motion.div>
+      ))}
+    </div>
+  );
+});
+
+Examples.displayName = "Examples";

apps/web/src/modules/chat/layout/headline.tsx

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+import { useTranslation } from "@turbostarter/i18n";
+import { getGreeting } from "@turbostarter/shared/utils";
+
+export const Headline = () => {
+  const { t } = useTranslation(["common", "ai"]);
+  const { text, emoji } = getGreeting();
+
+  return (
+    <h1 className="leading-tighter flex w-full flex-col items-center justify-center text-center text-2xl tracking-tight @sm:text-3xl @md:text-4xl">
+      {t(`greeting.${text}`)} {emoji}
+      <span className="text-muted-foreground">{t("ai:chat.headline")}</span>
+    </h1>
+  );
+};

apps/web/src/modules/chat/layout/new.tsx

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+import { memo } from "react";
+
+import { ChatComposer } from "~/modules/chat/composer";
+import { ChatDropzone } from "~/modules/chat/composer/dropzone";
+import { useComposer } from "~/modules/chat/composer/hooks/use-composer";
+import { Examples } from "~/modules/chat/layout/examples";
+import { Headline } from "~/modules/chat/layout/headline";
+
+interface NewChatProps {
+  id: string;
+}
+
+export const NewChat = memo<NewChatProps>(({ id }) => {
+  const { model } = useComposer({ id });
+  return (
+    <ChatDropzone disabled={!model?.attachments}>
+      <div className="mx-auto flex h-full w-full flex-col items-center justify-between gap-6 md:justify-center md:gap-9 md:p-2">
+        <div className="flex w-full grow items-end">
+          <Headline />
+        </div>
+        <div className="flex w-full grow flex-col items-center justify-between md:flex-col-reverse md:justify-end md:gap-5">
+          <Examples className="flex" id={id} />
+          <div className="relative w-full px-3 pb-3">
+            <ChatComposer id={id} />
+          </div>
+        </div>
+      </div>
+    </ChatDropzone>
+  );
+});
+
+NewChat.displayName = "NewChat";

apps/web/src/modules/chat/layout/view.tsx

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+"use client";
+
+import { memo } from "react";
+
+import { ChatComposer } from "~/modules/chat/composer";
+import { ChatDropzone } from "~/modules/chat/composer/dropzone";
+import { Chat } from "~/modules/chat/thread";
+
+import { useComposer } from "../composer/hooks/use-composer";
+
+import type { ChatMessage } from "@turbostarter/ai/chat/types";
+
+interface ViewChatProps {
+  readonly id: string;
+  readonly initialMessages?: ChatMessage[];
+}
+
+export const ViewChat = memo<ViewChatProps>(({ id, initialMessages }) => {
+  const { model } = useComposer({ id, initialMessages });
+
+  return (
+    <ChatDropzone disabled={!model?.attachments}>
+      <Chat id={id} initialMessages={initialMessages} />
+
+      <div className="absolute inset-x-0 bottom-0 z-50 mx-auto max-w-[50rem]">
+        <div className="relative z-40 flex w-full flex-col items-center px-3 pb-3">
+          <ChatComposer id={id} initialMessages={initialMessages} />
+        </div>
+      </div>
+    </ChatDropzone>
+  );
+});
+
+ViewChat.displayName = "ViewChat";