feat(media): add mpv and imv media viewers

new `modules/media.nix`: mpv (with mpv-gallery-view) for video/audio, imv for
images. imv key binds run per-file actions — copy path via `wl-copy`, rotate/
flip via `magick`, delete, open in gimp, show `mediainfo`. wallpaper via awww
plus a `setbg` wrapper (symlink to ~/.local/share/bg + live push); awww-daemon
and boot restore wired as hyprland exec-once. add mako as the notification
daemon backing the notify-send toasts.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

modules/home.nix

@@ -11,7 +11,7 @@ let
   editor = "nvim";
 in
 {
-  imports = [ ./gpg.nix ];
+  imports = [ ./gpg.nix ./media.nix ];
 
   home.sessionVariables = {
     TERMINAL = terminal;
@@ -332,10 +332,27 @@ in
         # Uses foot's default socket, which footclient also defaults to.
         # Tradeoff: if the server dies, all foot windows die with it.
         "foot --server"
+        # wallpaper (see modules/media.nix): start the awww daemon, then restore
+        # the persisted choice. awww keeps no state across restarts, so re-push
+        # the ~/.local/share/bg symlink if it exists.
+        "awww-daemon"
+        "sh -c '[ -e \"$HOME/.local/share/bg\" ] && awww img \"$HOME/.local/share/bg\"'"
       ];
     };
   };
 
+  # Notification daemon. notify-send clients (e.g. imv's info/delete toasts in
+  # modules/media.nix, gpg-agent errors) need a running server on the bus.
+  # Minimal to match the desktop: Nerd Font, no rounding, square border.
+  services.mako = {
+    enable = true;
+    settings = {
+      font = "JetBrainsMono Nerd Font 10";
+      border-radius = 0;
+      default-timeout = 5000;
+    };
+  };
+
   programs.waybar = {
     enable = true;
     settings = {

modules/media.nix

@@ -0,0 +1,53 @@
+# Generic media viewers. mpv for video/audio, imv for images — both minimal,
+# keyboard-driven, Wayland-native. No personal config here.
+#
+# imv key binds run external actions on the current file (yank path, rotate/flip,
+# delete, open in editor, info). Wallpaper uses awww (daemon + CLI): `setbg`
+# symlinks the chosen file to ~/.local/share/bg and pushes it live. The
+# awww-daemon and the boot-time restore from that symlink run as Hyprland
+# `exec-once` (see home.nix).
+
+{ pkgs, ... }:
+
+let
+  # setbg: persist the choice as an XDG-data symlink, then set it live. Startup
+  # restore just re-runs `awww img` against the same symlink.
+  setbg = pkgs.writeShellScriptBin "setbg" ''
+    bgloc="''${XDG_DATA_HOME:-$HOME/.local/share}/bg"
+    [ -n "$1" ] && ln -sf "$(readlink -f "$1")" "$bgloc"
+    ${pkgs.awww}/bin/awww img "$bgloc"
+  '';
+in
+{
+  programs.mpv = {
+    enable = true;
+    # gallery/thumbnail grid for playlists. Ships the scripts; key bindings to
+    # open it can be added later via programs.mpv.bindings (input.conf).
+    scripts = [ pkgs.mpvScripts.mpv-gallery-view ];
+  };
+
+  programs.imv = {
+    enable = true;
+    settings.binds = {
+      "w"         = ''exec setbg "$imv_current_file"'';
+      "y"         = ''exec printf %s "$imv_current_file" | wl-copy'';
+      "<Shift+Y>" = ''exec readlink -f "$imv_current_file" | wl-copy'';
+      "<Shift+D>" = ''exec rm "$imv_current_file"'';                                     # no confirm
+      "r"         = ''exec magick "$imv_current_file" -rotate 90  "$imv_current_file"'';
+      "<Shift+R>" = ''exec magick "$imv_current_file" -rotate -90 "$imv_current_file"'';
+      "f"         = ''exec magick "$imv_current_file" -flop "$imv_current_file"'';
+      "g"         = ''exec gimp "$imv_current_file"'';
+      "i"         = ''exec notify-send "File info" "$(mediainfo "$imv_current_file")"'';
+    };
+  };
+
+  home.packages = with pkgs; [
+    setbg
+    awww            # wayland wallpaper daemon (setbg backend)
+    wl-clipboard    # wl-copy, for the yank binds
+    imagemagick     # `magick`: rotate/flip binds
+    mediainfo       # `i` info bind
+    libnotify       # notify-send client (daemon = mako, in home.nix)
+    gimp            # `g` open-in-editor bind
+  ];
+}