Harden server and add Nix-native CI + self-hosted Gitea Actions

- Add self-hosted Gitea Actions runner module (servers/hetzner/modules/services/gitea.nix)
- Add CI workflow (.gitea/workflows/ci.yml):
  - Flake check (x86_64-linux + aarch64-linux, eval-only)
  - Pre-commit checks (x86_64-linux only)
  - Gitea-native runner (no Docker); Nix from host PATH
  - NIX_CONFIG enables flakes + extra-platforms
- Remove redundant .github/workflows/ci.yml (shadows .gitea)
- Enable deadnix in pre-commit hooks (flake.nix), fix 38 files
- Add statix.toml disabling empty_pattern lint (nixpkgs standard)
- Format whole repo with alejandra (27 files)
- Fix CI nix-not-found: export /run/current-system/sw/bin in PATH
- Remove aarch64 from pre-commit matrix (no QEMU binfmt deployed yet)

home/editors/nvim/default.nix

@@ -1,5 +1,4 @@
 {
-  config,
   lib,
   pkgs,
   ...

home/editors/zed/default.nix

@@ -1,5 +1,4 @@
 {
-  config,
   lib,
   pkgs,
   ...

home/packages/android.nix

@@ -1,8 +1,4 @@
-{
-  inputs,
-  pkgs,
-  ...
-}: let
+{pkgs, ...}: let
   kotlin-lsp = pkgs.runCommand "kotlin-lsp" {} ''
     mkdir -p $out/bin
     ln -s ${pkgs.kotlin-language-server}/bin/kotlin-language-server $out/bin/kotlin-lsp

home/packages/packages.nix

@@ -1,8 +1,4 @@
-{
-  inputs,
-  pkgs,
-  ...
-}: {
+{pkgs, ...}: {
   users.users.someone.packages = with pkgs; [
     # screenshot
     grim

home/packages/wayland/niri/_binds.nix

@@ -1,4 +1,4 @@
-{pkgs}: {
+{}: {
   "XF86AudioPlay" = {
     _props.allow-when-locked = true;
     spawn._args = ["playerctl" "play-pause"];

home/services/wayland/ashell.nix

@@ -1,9 +1,4 @@
-{
-  config,
-  pkgs,
-  lib,
-  ...
-}: {
+{pkgs, ...}: {
   users.users.someone.packages = [pkgs.ashell];
 
   xdg.configFile."ashell/config.toml".text = ''

home/services/wayland/mako.nix

@@ -1,9 +1,4 @@
-{
-  config,
-  pkgs,
-  lib,
-  ...
-}: {
+{pkgs, ...}: {
   users.users.someone.packages = [pkgs.mako];
 
   xdg.configFile."mako/config".text = ''

home/services/wayland/walker.nix

@@ -1,9 +1,4 @@
-{
-  config,
-  pkgs,
-  lib,
-  ...
-}: {
+{pkgs, ...}: {
   users.users.someone.packages = [pkgs.walker pkgs.elephant];
 
   xdg.configFile."walker/config.toml".text = ''

home/terminal/emulators/alacritty.nix

@@ -1,8 +1,4 @@
-{
-  pkgs,
-  lib,
-  ...
-}: let
+{pkgs, ...}: let
   alacritty-wrapped = pkgs.writeShellScriptBin "alacritty-wayland" ''
     export WAYLAND_DISPLAY="wayland-1"
     export XDG_CURRENT_DESKTOP="Niri"

home/terminal/software/ssh.nix

@@ -2,9 +2,7 @@
   config,
   pkgs,
   ...
-}: let
-  sshConfigFile = "ssh/config";
-in {
+}: {
   users.users.someone.packages = with pkgs; [
     openssh
   ];

home/terminal/software/tui.nix

@@ -1,8 +1,4 @@
-{
-  inputs,
-  pkgs,
-  ...
-}: {
+{pkgs, ...}: {
   users.users.someone.packages = with pkgs; [
     # archives
     zip

home/xdg-compat.nix

@@ -159,7 +159,7 @@ in {
       ${lib.concatStringsSep "\n" (
         lib.flatten (
           lib.mapAttrsToList (
-            user: userCfg:
+            _user: userCfg:
               (lib.mapAttrsToList (mkLinkScript cfg.configHome) userCfg.configFiles)
               ++ (lib.mapAttrsToList (mkLinkScript cfg.cacheHome) userCfg.cacheFiles)
               ++ (lib.mapAttrsToList (mkLinkScript cfg.dataHome) userCfg.dataFiles)