feat(cli): claudemesh launch command with transparency banner (v0.1.2)

Adds `claudemesh launch [args]` that spawns Claude Code with
--dangerously-load-development-channels server:claudemesh so peer
messages arrive as <channel> system reminders mid-turn instead of
pull-only via check_messages. Windows uses shell:true to resolve
claude.cmd from PATHEXT.

Prints an info banner before spawning that explains the channel's
scope (peer text injection only), the trust model (treat as
untrusted input), and that existing tool-approval prompts remain
the safety net. --quiet skips the banner.

Install output now mentions `claudemesh launch` as the recommended
launch path; plain `claude` still works for pull-only mode.

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

apps/cli/src/index.ts

@@ -15,6 +15,7 @@ import { runList } from "./commands/list";
 import { runLeave } from "./commands/leave";
 import { runSeedTestMesh } from "./commands/seed-test-mesh";
 import { runHook } from "./commands/hook";
+import { runLaunch } from "./commands/launch";
 
 const HELP = `claudemesh — peer mesh for Claude Code sessions
 
@@ -25,6 +26,9 @@ Commands:
   install         Register MCP + Stop/UserPromptSubmit status hooks
                   (add --no-hooks for bare MCP registration)
   uninstall       Remove MCP server + hooks
+  launch [args]   Launch Claude Code with real-time push messages enabled
+                  (add --quiet to skip the info banner; passes through
+                  extra flags, e.g. --model, --resume)
   join <url>      Join a mesh via https://claudemesh.com/join/... URL
   list            Show all joined meshes
   leave <slug>    Leave a joined mesh
@@ -55,6 +59,9 @@ async function main(): Promise<void> {
     case "hook":
       await runHook(args);
       return;
+    case "launch":
+      runLaunch(args);
+      return;
     case "join":
       await runJoin(args);
       return;