v0.2.1: Fix cancel key (Escape) being swallowed globally

The cancel key was consumed by rdev::grab at all times, not just during
recording/transcribing. This made the Escape key unusable system-wide
while Mouth was running. Now the cancel key only gets swallowed when
Mouth is actively recording or transcribing.

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

Cargo.lock

@@ -2224,7 +2224,7 @@ dependencies = [
 
 [[package]]
 name = "mouth"
-version = "0.2.0"
+version = "0.2.1"
 dependencies = [
  "anyhow",
  "arboard",