Refactor git modules

modules/git/home.nix

@@ -0,0 +1,63 @@
+{ config, pkgs, ... }:
+
+{
+  programs.git-credential-oauth = {
+    enable = true;
+  };
+
+  programs.git = {
+    enable = true;
+
+    ignores = [
+      "**/.claude/settings.local.json"
+      ".DS_Store"
+      ".env"
+      "node_modules/"
+      ".venv/"
+    ];
+
+    settings = {
+      user = {
+        name = "Yan Lin";
+        email = "github@yanlincs.com";
+      };
+
+      credential = {
+        "https://github.com".helper = "oauth";
+        "https://gitlab.com".helper = "oauth";
+        "https://bitbucket.org".helper = "oauth";
+        "https://git.overleaf.com".helper = "store";
+        "https://git.overleaf.com".username = "git";
+      };
+
+      core = {
+        editor = "nvim";
+        autocrlf = "input";
+        ignorecase = false;
+      };
+
+      init.defaultBranch = "main";
+
+      push = {
+        default = "simple";
+        autoSetupRemote = true;
+      };
+
+      pull = {
+        rebase = true;
+      };
+
+      merge = {
+        conflictstyle = "diff3";
+      };
+
+      diff = {
+        colorMoved = "default";
+      };
+
+      status = {
+        showUntrackedFiles = "all";
+      };
+    };
+  };
+}