feat: remplacer light par acpilight/xbacklight, ajouter ddcutil pour écrans externes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nixos/configuration.nix

@@ -105,16 +105,29 @@
   # };
   programs.zsh.enable =
     true; # see https://github.com/NixOS/nixpkgs/issues/20548#issuecomment-261965667
-  programs.light.enable = true;
+  hardware.acpilight.enable = true;
+  hardware.i2c.enable = true;
 
   programs.nix-ld = {
     enable = true;
     libraries = with pkgs; [ fnm stdenv.cc.cc.lib ];
   };
 
-  # Printing (Epson Stylus SX230 - St Drézéry)
+  # Printing
-  services.printing.enable = true;
+  services.printing = {
-  services.printing.drivers = with pkgs; [ epson-escpr ];
+    enable = true;
+    drivers = with pkgs; [
+      epson-escpr # Epson Stylus SX230
+      gutenprint # Brother MFC-9330CDW (couleur, fallback si driverless KO)
+    ];
+  };
+
+  # Découverte imprimantes réseau (Bonjour/mDNS)
+  services.avahi = {
+    enable = true;
+    nssmdns4 = true;
+    openFirewall = true;
+  };
 
   # List services that you want to enable:
   services.nscd.enable = true;

packages.nix

@@ -1,10 +1,24 @@
 { pkgs, lib, ... }:
 
+let
+  pythonOverlay = final: prev: {
+    python313 = prev.python313.override {
+      packageOverrides = pyself: pysuper: {
+        picosvg = pysuper.picosvg.overrideAttrs (_: {
+          doCheck = false;
+        });
+      };
+    };
+    python313Packages = final.python313.pkgs;
+  };
+in
 let
   atomicptr = import (fetchTarball
     "https://github.com/atomicptr/nix/archive/refs/heads/master.tar.gz") { };
   rtk = pkgs.callPackage ./pkgs/rtk.nix { };
 in {
+  nixpkgs.overlays = [ pythonOverlay ];
+
   nixpkgs.config.allowUnfreePredicate = pkg:
     builtins.elem (lib.getName pkg) [
       "1password"
@@ -104,7 +118,7 @@ in {
     mattermost-desktop
     signal-desktop
     libreoffice
-    freemind
+    ddcutil
     filezilla
     vokoscreen-ng
     ffmpeg
@@ -179,6 +193,7 @@ in {
     audacity
     freeplane
     calibre
+    retext
     gparted
     ticktick
     agate

programs/i3.nix

@@ -76,9 +76,8 @@
         "XF86AudioPrev" = "exec playerctl previous";
 
         # Sreen brightness controls
-        "XF86MonBrightnessUp" = "exec light -A 2"; # increase screen brightness
+        "XF86MonBrightnessUp" = "exec xbacklight -inc 5";
-        "XF86MonBrightnessDown" =
+        "XF86MonBrightnessDown" = "exec xbacklight -dec 5";
-          "exec light -U 2"; # decrease screen brightness
 
         # Speech-to-text (toggle: press to start/stop)
         "${modifier}+space" = "exec ~/.local/bin/stt-dictate toggle";