docs(docs): update desktop shortcuts and terminal padding documentation

docs/desktop/umbriel.mdx

@@ -99,6 +99,7 @@ Noctalia's bar, panels, notifications, dock, OSD, and desktop widgets get blur t
 | --- | --- |
 | `Mod+Space` | Noctalia launcher |
 | `Mod+Shift+Space` | Noctalia launcher, emoji search (`/emo`) |
+| `Super+Ctrl+Shift+BackSpace` | Noctalia launcher, session actions (`/session`: lock, suspend, reboot, shutdown, logout) |
 | `Mod+P` | Noctalia clipboard history |
 | `Mod+Period` / `Mod+Comma` | Noctalia control center / settings |
 | `Super+Alt+Ctrl+N` | Noctalia notes panel |

docs/terminal/ghostty.mdx

@@ -25,7 +25,7 @@ It is the default everywhere a desktop picks a terminal: `$TERMINAL` in the [Umb
 | `adjust-cell-height` | `20%` (line height) |
 | `background-opacity` / `background-blur` | `0.9` / `true` |
 | `window-decoration` | `false`; `gtk-titlebar = false` |
-| `window-padding-x/y` | `2` |
+| `window-padding-x/y` | `0` |
 | `cursor-style` | `underline`, blinking |
 | `scrollback-limit` | `3023` (tmux keeps the real scrollback: `history-limit 50000`) |
 | `mouse-hide-while-typing` | `true` |