refactor(dotfiles): rename system/ to common/ and remove unused configs

Rename dotfiles/system to dotfiles/common for clarity - indicates
shared dotfiles used across all desktop environments (DWM, Hyprland).

Removed config directories for uninstalled applications:
- ghostty (using different terminal)
- lf (using ranger instead)
- mopidy (using mpd instead)
- nitrogen (X11-only, obsolete for Wayland)
- pychess (not installed)
- JetBrains (not installed via archsetup)
- youtube-dl (using yt-dlp with different config location)

Kept audacious config for potential future use.

Updated all references in archsetup, CLAUDE.md, todo.org, and
validation.sh.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 61 insertions, 0 deletions

diff --git a/dotfiles/common/.config/calibre/plugins/Open With.json b/dotfiles/common/.config/calibre/plugins/Open With.json
new file mode 100644
index 0000000..81eaeb8
--- /dev/null
+++ b/dotfiles/common/.config/calibre/plugins/Open With.json
@@ -0,0 +1,61 @@
+{
+  "OpenWithMenus": {
+    "Menus": [
+      {
+        "active": false,
+        "appArgs": "",
+        "appPath": "firefox",
+        "format": "EPUB",
+        "image": "owp_firefox.png",
+        "menuText": "EPUBReader (EPUB)",
+        "subMenu": ""
+      },
+      {
+        "active": false,
+        "appArgs": "-c",
+        "appPath": "/usr/bin/emacsclient",
+        "format": "PDF",
+        "image": "reader.png",
+        "menuText": "Emacsclient",
+        "subMenu": ""
+      },
+      {
+        "active": true,
+        "appArgs": "",
+        "appPath": "/usr/bin/zathura",
+        "format": "EPUB",
+        "image": "edit_book.png",
+        "menuText": "Zathura (EPUB)",
+        "subMenu": ""
+      },
+      {
+        "active": true,
+        "appArgs": "",
+        "appPath": "/usr/bin/zathura",
+        "format": "PDF",
+        "image": "PDF.png",
+        "menuText": "Zathura (PDF)",
+        "subMenu": ""
+      },
+      {
+        "active": false,
+        "appArgs": "-c",
+        "appPath": "/usr/bin/emacsclient",
+        "format": "EPUB",
+        "image": "PDF.png",
+        "menuText": "Emacsclient",
+        "subMenu": ""
+      },
+      {
+        "active": false,
+        "appArgs": "",
+        "appPath": "gimp",
+        "format": "COVER",
+        "image": "owp_gimp.png",
+        "menuText": "Gimp (Cover)",
+        "subMenu": ""
+      }
+    ],
+    "UrlColWidth": 202
+  }
+}
\ No newline at end of file