Purge remaining references to removed western apps

The quattro upgrade script no longer registers the HEY mailto
handler, installer tips stop naming LibreOffice, and the hotkeys,
GUIs, and web-apps manuals drop the entries for removed apps.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QKxGW1raAWaqeU8WdHsMsp

manual/07-hotkeys.md

@@ -107,21 +107,12 @@ You can see all the main keyboard bindings with `Super + K` (Tmux bindings with
 | `Super + Shift + Alt + M`           | Music (cliamp)    |
 | `Super + Shift + /`           | Password manager (1password)    |
 | `Super + Shift + N`           | Editor (Neovim)  |
-| `Super + Shift + C`           | Calendar ([HEY](https://hey.com/))  |
-| `Super + Shift + E`           | Email ([HEY](https://hey.com/))  |
-| `Super + Shift + Alt + E`           | New email ([HEY](https://hey.com/))  |
 | `Super + Shift + A`           | AI (ChatGPT)  |
 | `Super + Shift + Alt + A`           | AI (Grok)  |
 | `Super + Shift + G`           | Messenger (Signal)  |
-| `Super + Shift + P`           | Google Photos  |
-| `Super + Shift + S`           | Google Maps  |
-| `Super + Shift + Alt + G`           | Messenger (WhatsApp)  |
-| `Super + Shift + Ctrl + G`           | Messenger (Google)  |
 | `Super + Shift + D`           | Docker (LazyDocker)  |
 | `Super + Shift + O`           | Obsidian  |
 | `Super + Shift + W`           | Writing (Omawrite)  |
-| `Super + Shift + X`           | X |
-| `Super + Shift + Alt + X`           | X Compose |
 | `Super + Shift + Y`           | YouTube |
 
 Change/add bindings in `~/.config/hypr/bindings.lua`.