Major config overhaul: use custom modules, setup for multi-host config, and less boilerplate

modules/user/browser/brave.nix

@@ -0,0 +1,44 @@
+{ config, lib, pkgs, ... }:
+
+let
+  cfg = config.userSettings.brave;
+in {
+  options = {
+    userSettings.brave = {
+      enable = lib.mkEnableOption "Enable brave browser";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    home.packages = [ pkgs.brave ];
+
+    nixpkgs.config.overlays = [
+      (self: super: {
+        brave = super.brave.override {
+          commandLineArgs = [
+            "--password-store=gnome-libsecret"
+            "--ignore-gpu-blocklist"
+            "--enable-gpu-rasterization"
+            "--enable-accelerated-video-decode"
+            "--enable-quic"
+            "--enable-zero-copy"
+            "--enable-native-gpu-memory-buffers"
+            "--num-raster-threads=4"
+          ];
+        };
+      })
+    ];
+
+    xdg.mimeApps.defaultApplications = lib.mkIf (config.userSettings.browser == "brave" ) {
+      "text/html" = "brave-browser.desktop";
+      "x-scheme-handler/http" = "brave-browser.desktop";
+      "x-scheme-handler/https" = "brave-browser.desktop";
+      "x-scheme-handler/about" = "brave-browser.desktop";
+      "x-scheme-handler/unknown" = "brave-browser.desktop";
+    };
+
+    home.sessionVariables = lib.mkIf (config.userSettings.browser == "brave") {
+      DEFAULT_BROWSER = "${pkgs.brave}/bin/brave";
+    };
+  };
+}