Improve UX: hide console window and fade connection status

- Hide console window on compiled desktop app (console=False in spec)
- Add 20-second auto-fade to "Connected" status in OBS display
- Keep "Disconnected" status visible until reconnection
- Add PM2 deployment configuration and documentation

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

local-transcription.spec

@@ -137,7 +137,7 @@ exe = EXE(
     bootloader_ignore_signals=False,
     strip=False,
     upx=True,
-    console=True,  # Set to False to hide console window
+    console=False,  # Hide console window for GUI application
     disable_windowed_traceback=False,
     argv_emulation=False,
     target_arch=None,