fix: include line in CLI --json search output

but that function has no callers — the CLI's outputResults() uses its
own inline JSON formatting that destructured only .snippet from
extractSnippet(), discarding .line. Extract the full SnippetResult
and spread the line field into the JSON output object.

Closes #505

src/cli/qmd.ts

@@ -1932,7 +1932,8 @@ function outputResults(results: OutputRow[], query: string, opts: OutputOptions)
     const output = filtered.map(row => {
       const docid = row.docid || (row.hash ? row.hash.slice(0, 6) : undefined);
       let body = opts.full ? row.body : undefined;
-      let snippet = !opts.full ? extractSnippet(row.body, query, 300, row.chunkPos, undefined, opts.intent).snippet : undefined;
+      const snippetInfo = !opts.full ? extractSnippet(row.body, query, 300, row.chunkPos, undefined, opts.intent) : undefined;
+      let snippet = snippetInfo?.snippet;
       if (opts.lineNumbers) {
         if (body) body = addLineNumbers(body);
         if (snippet) snippet = addLineNumbers(snippet);
@@ -1941,6 +1942,7 @@ function outputResults(results: OutputRow[], query: string, opts: OutputOptions)
         ...(docid && { docid: `#${docid}` }),
         score: Math.round(row.score * 100) / 100,
         file: toQmdPath(row.displayPath),
+        ...(snippetInfo && { line: snippetInfo.line }),
         title: row.title,
         ...(row.context && { context: row.context }),
         ...(body && { body }),