fix(cli): v0.1.14 — persist displayName in config file, not env var

Write displayName into tmpdir config.json so the MCP server reads
it directly. Env vars from claudemesh launch may not propagate to
MCP child processes spawned by Claude Code. Config file is reliable.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/cli/src/state/config.ts

@@ -31,6 +31,7 @@ export interface JoinedMesh {
 export interface Config {
   version: 1;
   meshes: JoinedMesh[];
+  displayName?: string; // per-session override, written by `claudemesh launch --name`
 }
 
 const CONFIG_DIR = env.CLAUDEMESH_CONFIG_DIR ?? join(homedir(), ".claudemesh");
@@ -46,7 +47,7 @@ export function loadConfig(): Config {
     if (!parsed || !Array.isArray(parsed.meshes)) {
       return { version: 1, meshes: [] };
     }
-    return { version: 1, meshes: parsed.meshes };
+    return { version: 1, meshes: parsed.meshes, displayName: parsed.displayName };
   } catch (e) {
     throw new Error(
       `Failed to load ${CONFIG_PATH}: ${e instanceof Error ? e.message : String(e)}`,