chore: fix formatting and clippy lints

server/src/handlers/git.rs

@@ -139,8 +139,8 @@ impl McpTool for QueryGitDiffsHandler {
             let git_matches = tokio::task::spawn_blocking(move || {
                 let mut results = Vec::new();
                 let cwd = env::current_dir().unwrap_or_default();
-                if let Ok(repo) = git2::Repository::discover(&cwd) {
-                    if let Ok(mut revwalk) = repo.revwalk() {
+                if let Ok(repo) = git2::Repository::discover(&cwd)
+                    && let Ok(mut revwalk) = repo.revwalk() {
                         let _ = revwalk.push_head();
                         let mut count = 0;
                         for oid in revwalk.flatten() {
@@ -161,7 +161,6 @@ impl McpTool for QueryGitDiffsHandler {
                             }
                         }
                     }
-                }
                 results
             })
             .await
@@ -215,4 +214,3 @@ mod tests {
         assert!(parsed.get("branch").is_some() || parsed.is_object());
     }
 }
-