fix: Replace htmlUrl with url in gh search repos query

The gh CLI does not support 'htmlUrl' as a field name in
search repos --json output. It only supports 'url'.

This caused all research pipeline runs to fail silently because
GitHubProvider.search() was querying for 'htmlUrl' which gh returned
as undefined, leading to failed lookups.

Fix:
- Changed --json query parameters from 'htmlUrl' to 'url'
- Updated GitHubRepoResult and GitHubIssueResult types
- Updated all code references from repo.htmlUrl/issue.htmlUrl to repo.url/issue.url
- Updated test mocks accordingly

Fixes: DT-217, DT-218

packages/engine/src/research/providers/__tests__/github-provider.test.ts

@@ -29,7 +29,7 @@ describe("GitHubProvider", () => {
 
   it("searches repositories", async () => {
     runGhJsonAsyncMock.mockResolvedValueOnce([
-      { fullName: "org/repo", description: "desc", htmlUrl: "https://github.com/org/repo", stargazersCount: 12, language: "ts", updatedAt: "2026" },
+      { fullName: "org/repo", description: "desc", url: "https://github.com/org/repo", stargazersCount: 12, language: "ts", updatedAt: "2026" },
     ]);
     const provider = new GitHubProvider();
 
@@ -41,7 +41,7 @@ describe("GitHubProvider", () => {
 
   it("searches issues", async () => {
     runGhJsonAsyncMock.mockResolvedValueOnce([
-      { title: "Issue", body: "body", htmlUrl: "https://github.com/org/repo/issues/1", state: "open", labels: [{ name: "bug" }] },
+      { title: "Issue", body: "body", url: "https://github.com/org/repo/issues/1", state: "open", labels: [{ name: "bug" }] },
     ]);
 
     const provider = new GitHubProvider();
@@ -52,8 +52,8 @@ describe("GitHubProvider", () => {
 
   it("supports combined search", async () => {
     runGhJsonAsyncMock
-      .mockResolvedValueOnce([{ fullName: "org/repo", htmlUrl: "https://github.com/org/repo" }])
-      .mockResolvedValueOnce([{ title: "Issue", htmlUrl: "https://github.com/org/repo/issues/1" }]);
+      .mockResolvedValueOnce([{ fullName: "org/repo", url: "https://github.com/org/repo" }])
+      .mockResolvedValueOnce([{ title: "Issue", url: "https://github.com/org/repo/issues/1" }]);
 
     const provider = new GitHubProvider();
     const results = await provider.search("query", {});

packages/engine/src/research/providers/github-provider.ts

@@ -19,7 +19,7 @@ type SearchType = "repos" | "issues" | "both";
 interface GitHubRepoResult {
   fullName: string;
   description?: string;
-  htmlUrl: string;
+  url: string;
   stargazersCount?: number;
   language?: string;
   updatedAt?: string;
@@ -28,7 +28,7 @@ interface GitHubRepoResult {
 interface GitHubIssueResult {
   title: string;
   body?: string;
-  htmlUrl: string;
+  url: string;
   state?: string;
   labels?: Array<{ name?: string }>;
 }
@@ -60,7 +60,7 @@ export class GitHubProvider implements ResearchProvider {
             "repos",
             query,
             "--json",
-            "fullName,description,htmlUrl,stargazersCount,language,updatedAt",
+            "fullName,description,url,stargazersCount,language,updatedAt",
             "--limit",
             String(maxResults),
           ],
@@ -69,9 +69,9 @@ export class GitHubProvider implements ResearchProvider {
 
         sources.push(
           ...repos.slice(0, maxResults).map((repo, idx) => ({
-            id: `github-repo-${idx}-${repo.htmlUrl}`,
+            id: `github-repo-${idx}-${repo.url}`,
             type: "github" as const,
-            reference: repo.htmlUrl,
+            reference: repo.url,
             title: repo.fullName,
             excerpt: repo.description ?? "",
             status: "completed" as const,
@@ -93,7 +93,7 @@ export class GitHubProvider implements ResearchProvider {
             "issues",
             query,
             "--json",
-            "title,body,htmlUrl,state,labels",
+            "title,body,url,state,labels",
             "--limit",
             String(maxResults),
           ],
@@ -102,9 +102,9 @@ export class GitHubProvider implements ResearchProvider {
 
         sources.push(
           ...issues.slice(0, maxResults).map((issue, idx) => ({
-            id: `github-issue-${idx}-${issue.htmlUrl}`,
+            id: `github-issue-${idx}-${issue.url}`,
             type: "github" as const,
-            reference: issue.htmlUrl,
+            reference: issue.url,
             title: issue.title,
             excerpt: issue.body?.slice(0, 280) ?? "",
             status: "completed" as const,