fix(cli): rename syncs local config + picker shows display name

After renaming the mesh display name on the server, the launch
picker still showed the slug ("flexicar-2") because (a) local
config.json was not updated and (b) the picker only printed
mesh.slug. Now: rename writes the new name back into config.json
on success, and the picker prints "name (slug)" when they differ.
Also surfaces a hint that slugs are immutable (today).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/cli/src/commands/launch.ts

@@ -49,7 +49,8 @@ async function pickMesh(meshes: JoinedMesh[]): Promise<JoinedMesh> {
 
   console.log("\n  Select mesh:");
   meshes.forEach((m, i) => {
-    console.log(`    ${i + 1}) ${m.slug}`);
+    const label = m.name && m.name !== m.slug ? `${m.name}  \x1b[2m(${m.slug})\x1b[0m` : m.slug;
+    console.log(`    ${i + 1}) ${label}`);
   });
   console.log("");
 

apps/cli/src/commands/rename.ts

@@ -1,6 +1,7 @@
 import { rename as renameMesh } from "~/services/mesh/facade.js";
 import { getStoredToken } from "~/services/auth/facade.js";
 import { ApiError } from "~/services/api/facade.js";
+import { readConfig, setMeshConfig } from "~/services/config/facade.js";
 import { bold, dim, green, icons } from "~/ui/styles.js";
 import { EXIT } from "~/constants/exit-codes.js";
 
@@ -19,7 +20,13 @@ export async function rename(slug: string, newName: string): Promise<number> {
 
   try {
     await renameMesh(slug, newName);
+    // Sync the new name into local config so launch / picker
+    // reflect the change without waiting for the next sync.
+    const cfg = readConfig();
+    const local = cfg.meshes.find((m) => m.slug === slug);
+    if (local) setMeshConfig(slug, { ...local, name: newName });
     console.log(`  ${green(icons.check)} Renamed "${slug}" to "${newName}"`);
+    console.log(`  ${dim("(slug stays \"" + slug + "\" — only the display name changed)")}`);
     return EXIT.SUCCESS;
   } catch (err) {
     if (err instanceof ApiError) {