feat: implement mute conversation support for Mastodon

This feature allows users to visually hide muted conversations from the Home timeline. It includes:

- Automatic filtering of muted posts in Home.

- Immediate visual removal of posts when muting a conversation.

- New 'mute_conversation' action in context menu and keyboard shortcuts.

- Default shortcut: Alt+Win+Shift+Delete

- Win10/11 shortcut: Ctrl+Alt+Win+Backspace

src/keymaps/Windows 10.keymap

@@ -57,5 +57,6 @@ update_buffer = string(default="control+alt+shift+u")
 ocr_image = string(default="win+alt+o")
 open_in_browser = string(default="alt+control+win+return")
 add_alias=string(default="")
+mute_conversation=string(default="control+alt+win+back")
 find = string(default="control+win+{")
 vote=string(default="alt+win+shift+v")

src/keymaps/Windows11.keymap

@@ -57,5 +57,6 @@ update_buffer = string(default="control+alt+shift+u")
 ocr_image = string(default="win+alt+o")
 open_in_browser = string(default="alt+control+win+return")
 add_alias=string(default="")
+mute_conversation=string(default="control+alt+win+back")
 find = string(default="control+win+{")
 vote=string(default="alt+win+shift+v")

src/keymaps/base.template

@@ -56,4 +56,6 @@ configuration = string(default="control+win+o")
 accountConfiguration = string(default="control+win+shift+o")
 update_buffer = string(default="control+win+shift+u")
 open_in_browser = string(default="alt+control+win+return")
-add_alias=string(default="")
+add_alias=string(default="")
+mute_conversation=string(default="alt+win+shift+delete")
+vote=string(default="alt+win+shift+v")

src/keymaps/default.keymap

@@ -59,4 +59,5 @@ update_buffer = string(default="control+win+shift+u")
 ocr_image = string(default="win+alt+o")
 open_in_browser = string(default="alt+control+win+return")
 add_alias=string(default="")
+mute_conversation=string(default="alt+win+shift+delete")
 vote=string(default="alt+win+shift+v")