v0.2.3: Run without console window on Windows

- Add windows_subsystem = "windows" to prevent console window on double-click
- Use AttachConsole(ATTACH_PARENT_PROCESS) so CLI subcommands still work from a terminal
- Show MessageBoxW error dialog if daemon fails to start
- Remove hide_console() (now unnecessary)
- Fix unused import warning in ipc.rs (warn → tracing::warn! inline)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Cargo.lock

@@ -2224,7 +2224,7 @@ dependencies = [
 
 [[package]]
 name = "mouth"
-version = "0.2.1"
+version = "0.2.3"
 dependencies = [
  "anyhow",
  "arboard",