docs: add Terminal Output title to code blocks on your-first-graph

Author: sharonwang554

src/content/docs/tutorials/your-first-graph.mdx

@@ -19,7 +19,7 @@ Once you've run `graft init`, you have a `graft/` directory full of linked Markd
 
    `graft map` is a token-budgeted first look at a repo — directory clusters with file/symbol counts, each dir's local hubs, and the global hotspots — all ranked by in-degree, no LLM, no key:
 
-   ```text
+   ```text title="Terminal Output"
    repo map — 113 files · 687 symbols · 2186 edges · typescript
    
    src/                63 files · 527 symbols   hubs: contextDirFor (node-file.ts, 21←), wiringPath (write.ts, 14←)
@@ -34,7 +34,7 @@ Once you've run `graft init`, you have a `graft/` directory full of linked Markd
 
    `graft grep` is exhaustive over every indexed file and groups hits by enclosing symbol, ranked by the same in-edge coupling `graft map` uses:
 
-   ```text
+   ```text title="Terminal Output"
    "NEEDLE" — 2 hits in 2 symbols across 1 files (searched 1 indexed files)
    
    heavilyCalled · function · src/a.ts:L1-L3 · 3 in-edges