Bump version to 1.3.0

Minor release: warm whisper-server backend (no per-dictation model
reload), live mic-level HUD with silence warning, and a custom
recognised->replacement dictionary that also biases the whisper prompt.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

macos/Makefile

@@ -2,7 +2,7 @@
 
 APP_NAME = WhisperDictate
 APP_BUNDLE = $(APP_NAME).app
-VERSION = 1.2.1
+VERSION = 1.3.0
 
 # Directories
 SRC_DIR = src