feat(bestie): Choose your bestie when there's none, and clear a deleted Bestie

docs/shell-design.md

@@ -254,7 +254,12 @@ avatar. Search, sidebar and history controls use unfilled ghost icon buttons wit
 Their hover fills remain translucent over the colored backdrop.
 Pressed fills are slightly stronger; icons keep full opacity. Plugin launchers
 use the shared glass style.
-Bestie is available in the Messages sidebar when its plugin is enabled.
+Bestie is available in the Messages sidebar when its plugin is enabled. An
+account-saved Bestie decorates that row with the agent's identity and promotes
+its exact one-to-one DM there. Search Buzz shows the same agent identity with
+**Bestie** as supporting text and matches either name. See
+[`solo/README.md`](solo/README.md) and the bundled Bestie README for selection,
+DM promotion and hosted-setup fallback ownership.
 `ProfileButton.tsx` uses the selected community's profile when connected and
 local defaults in Personal space. Its anchored account menu groups profile and
 status controls above Appearance, Plugins and Settings. The avatar inside the

docs/solo/README.md

@@ -130,12 +130,25 @@ behavior on the label, so a rename touches copy only.
   archive read has settled. A chosen agent missing for another reason is stood in
   for without replacing the choice. Until an agent is explicitly saved as the
   bestie, including for an automatic pick, a stand-in or a failed save, **Make my
-  bestie** stays offered. Nothing is picked until the account record has been read
-  and its archive read has settled, so a new chat is never tagged for a stale
-  pick. A new chat tags the current default once each time it is shown; the tag
-  isn't saved until the draft is edited, so showing an untouched new chat again
-  uses the current default. Archive rereads, failed rereads and reconnects keep
-  the last known archives, so a known deletion is never forgotten and a live
+  bestie** stays offered. When the Bestie plugin is enabled, the explicit
+  account-saved choice also owns its pinned sidebar destination; automatic and
+  stand-in defaults do not. The pinned destination reuses the newest verified
+  one-to-one DM whose only other member is that exact agent, opening one through
+  the shared DM service only when none exists. It is an ordinary DM with the same
+  history, draft, threads and unread state—not a Solo chat or a second message
+  store. While promoted, that DM is omitted from the ordinary Messages inventory;
+  replacing or deleting the Bestie, disabling the plugin, or losing the exact
+  roster match restores the ordinary row. The pinned navigation row adopts the
+  agent's name and avatar. Global search shows the same identity with **Bestie**
+  as supporting text and matches either name; the separate agent result remains
+  a **New chat** action rather than another route to the pinned DM.
+
+  Nothing is picked until the account record has been read and its archive read
+  has settled, so a new chat is never tagged for a stale pick. A new chat tags the
+  current default once each time it is shown; the tag isn't saved until the draft
+  is edited, so showing an untouched new chat again uses the current default.
+  Archive rereads, failed rereads and reconnects keep the last known archives, so
+  a known deletion is never forgotten and a live
   choice never disappears.
   Follow-ups keep all exact agents notified by the previous send, just like
   Team threads, including the shared Remember mentioned agents preference.

src/app/pages.integration.test.mjs

@@ -322,7 +322,7 @@ test("the app runtime exposes ready bundled pages and removes them on disable",
     assert.equal(bestiePage.primary, true);
     assert.match(
       renderToStaticMarkup(createElement(bestiePage.component)),
-      /Meet your Bestie/,
+      /Choose a community to continue with your Bestie\./,
     );
     await services.plugins.change("disable", "buzz.bestie");
     assert.equal(

src/app/shell/AppShell.tsx

@@ -4,6 +4,7 @@ import {
   useMemo,
   useRef,
   useState,
+  type ComponentProps,
   type ReactNode,
   type Ref,
 } from "react";
@@ -25,6 +26,7 @@ import type { Appearance } from "../../shared/theme/service";
 import { PageSearch, type SearchServices } from "./PageSearch";
 import { headerPageSelection, pagePlacement, orderPages } from "./presentation";
 import { PageNavigation } from "./PageNavigation";
+import { BestieNavigationProvider } from "./BestieNavigation";
 import type { NavigationOpenOptions } from "../../features/navigation/controller";
 import {
   PopoverRoot,
@@ -38,7 +40,18 @@ import { hasIntegratedWindowControls, WindowControls } from "./WindowControls";
 const macDesktop = isTauri() && /Mac/i.test(navigator.platform);
 const titleBarDragProps = macDesktop ? macTitleBarDragHandlers : {};
 
-export function AppShell({
+export function AppShell(props: ComponentProps<typeof AppShellContent>) {
+  return (
+    <BestieNavigationProvider
+      pages={props.pages}
+      relay={props.communities.relay}
+    >
+      <AppShellContent {...props} />
+    </BestieNavigationProvider>
+  );
+}
+
+function AppShellContent({
   pages,
   selected,
   navigationAttempt,

src/app/shell/BestieNavigation.module.css

@@ -0,0 +1,7 @@
+.label[data-bestie-unread] {
+  color: var(--text-navigation-unread);
+  font-weight: var(--type-weight-semibold);
+}
+[data-selected] .label[data-bestie-unread] {
+  color: var(--text-row-selected);
+}