fix: get diffs properly

mcp/review.ts

@@ -11,6 +11,7 @@ import {
 import { fixDoubleEscapedString } from "../utils/fixDoubleEscapedString.ts";
 import type { ChangedFileWithPatch } from "../utils/gitea.ts";
 import { retry } from "../utils/retry.ts";
+import { parseDiffToFiles } from "./checkout.ts";
 import { deleteProgressComment } from "./comment.ts";
 import type { ToolContext } from "./server.ts";
 import { execute, tool } from "./shared.ts";
@@ -62,17 +63,16 @@ export async function buildCommentableMap(
   const currentSha = ctx.toolState.checkoutSha;
   if (cached && cachedFor === pullNumber && cachedSha && cachedSha === currentSha) return cached;
 
-  const r = await ctx.gitea.request(
-    "GET /repos/{owner}/{repo}/pulls/{index}/files",
-    { owner: ctx.repo.owner, repo: ctx.repo.name, index: pullNumber, limit: 50 }
-  );
-  const files = r.data as ChangedFileWithPatch[];
-
+  const r = await ctx.gitea.rest.repository.repoDownloadPullDiffOrPatch({
+    owner: ctx.repo.owner,
+    repo: ctx.repo.name,
+    index: pullNumber,
+    diffType: "diff",
+  });
+  const files = parseDiffToFiles(r.data);
   const map = new Map<string, CommentableLines>();
   for (const file of files) {
-    if (file.filename) {
-      map.set(file.filename, commentableLinesForFile(file.patch));
-    }
+    if (file.filename) map.set(file.filename, commentableLinesForFile(file.patch));
   }
   return map;
 }