chore: add remote-dev desktop entries, zero tool, ostt model, brain allow

- New .desktop entries for steve-dev, bianca, dupont remote hosts
- Register them in mise.toml symlinks
- Add zero (mise plugin) to config
- Switch ostt whisper model medium->small
- Allow obsidian vault in pi permission system
- Fish alias cleanup (remove unnecessary =, add zero alias)

config/ostt/ostt.toml

@@ -2,7 +2,7 @@ config_version = "0.0.25"
 
 [transcription]
 provider = "whisper"
-model = "medium"
+model = "small"
 
 [audio]
 device = "default"
@@ -25,4 +25,3 @@ paste_key = "ctrl+shift+v"
 restore_clipboard = true
 restore_delay_ms = 750
 post_popup_delay_ms = 1000
-