feat(embedding,vision): candle embeddings with offline fallback, on-demand clipboard vision capture, and concurrency audit

server/src/handlers/git.rs

@@ -55,6 +55,10 @@ impl McpTool for GetActiveWorktreeContextHandler {
 
                 if let Some(diff) = diff {
                     let _ = diff.print(git2::DiffFormat::Patch, |_delta, _hunk, line| {
+                        match line.origin() {
+                            '+' | '-' | ' ' => diff_output.push(line.origin()),
+                            _ => {}
+                        }
                         let content = std::str::from_utf8(line.content()).unwrap_or("");
                         diff_output.push_str(content);
                         true