fix git deprecate issue

modules/git.nix

@@ -8,9 +8,6 @@
   programs.git = {
     enable = true;
 
-    userName = "Yan Lin";
-    userEmail = "github@yanlincs.com";
-    
     ignores = [
       # Claude Code
       "**/.claude/settings.local.json"
@@ -29,7 +26,12 @@
       ".env.*.local"
     ];
 
-    extraConfig = {
+    settings = {
+      user = {
+        name = "Yan Lin";
+        email = "github@yanlincs.com";
+      };
+
       # Platform-specific credential configuration
       credential = {
         # OAuth platforms (handled by git-credential-oauth)
@@ -71,34 +73,5 @@
         showUntrackedFiles = "all";
       };
     };
-    
-    aliases = {
-      st = "status";
-      co = "checkout";
-      br = "branch";
-      ci = "commit";
-      unstage = "reset HEAD --";
-      last = "log -1 HEAD";
-      visual = "!gitk";
-      
-      # Better logging
-      lg = "log --color --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit";
-      lga = "log --color --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit --all";
-      
-      # Quick operations
-      up = "pull --rebase";
-      cm = "commit -m";
-      ca = "commit --amend";
-      
-      # Show changes
-      d = "diff";
-      dc = "diff --cached";
-      ds = "diff --stat";
-      
-      # Stash operations
-      sl = "stash list";
-      sp = "stash pop";
-      ss = "stash save";
-    };
   };
 }