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>

.context/turbostarter-framework-context/sections/extension/structure/overview.md

@@ -0,0 +1,50 @@
+---
+title: Overview
+description: Learn about the structure of the extension app.
+url: /docs/extension/structure/overview
+---
+
+# Overview
+
+Every browser extension is different and can include different parts, removing the ones that are not needed.
+
+TurboStarter ships with all the things you need to start developing your own extension including:
+
+* **Popup window** - a small window that appears when the user clicks the extension icon.
+* **Options page** - a page that appears when user enters extension settings.
+* **Side panel** - a panel that appears when the user clicks sidepanel.
+* **New tab page** - a page that appears when the user opens a new tab.
+* **Devtools page** - a page that appears when the user opens the browser's devtools.
+* **Tab pages** - custom pages shipped with the extension.
+* **Content scripts** - injected scripts that run in the browser page.
+* **Background scripts** - scripts that run in the background.
+* **Message passing** - a way to communicate between different parts of the extension.
+* **Storage** - a way to store data in the extension.
+
+All the entrypoints are defined in `apps/extension/src/app` directory (it's similar to file-based routing in Next.js and Expo).
+
+This directory acts as a source for WXT framework which is used to build the extension. It has the following structure:
+
+<Files>
+  <Folder name="app" defaultOpen>
+    <Folder name="background - Background service worker" />
+
+    <Folder name="content - Content scripts" />
+
+    <Folder name="devtools - Devtools page with custom panels" />
+
+    <Folder name="newtab - New tab page" />
+
+    <Folder name="options - Options page" />
+
+    <Folder name="popup - Popup window" />
+
+    <Folder name="sidepanel - Side panel" />
+
+    <Folder name="tabs - Custom pages shipped with the extension" />
+  </Folder>
+</Files>
+
+By structurizing it this way, we can easily add new entrypoints in the future and extend rest of the extension independently from each other.
+
+We'll go through each part and explain the purpose of it, check following sections for more details: