feat: split issues tab into authored/reviewed and refine review tabs

src/app/api/github/contributions/[username]/route.ts

@@ -6,7 +6,7 @@ import { GITHUB_USERNAME_RE } from "@/lib/utils";
 import { RateLimitError } from "@/lib/types";
 import type { PaginatedContributions, DrillDownTab } from "@/lib/types";
 
-const VALID_TABS: DrillDownTab[] = ["prs", "reviews", "issues"];
+const VALID_TABS: DrillDownTab[] = ["prs", "reviews", "issues", "reviewed-issues"];
 const VALID_STATUSES = ["open", "closed", "merged", "all"];
 const CACHE_TTL = 600; // 10 minutes
 

src/app/api/github/issue-detail/[owner]/[repo]/[number]/route.ts

@@ -0,0 +1,51 @@
+import { NextResponse } from "next/server";
+import { auth } from "@/lib/auth";
+import { getCached, setCache } from "@/lib/cache";
+import { fetchIssueDetail } from "@/lib/github-rest";
+import { RateLimitError } from "@/lib/types";
+import type { IssueDetail } from "@/lib/types";
+
+const CACHE_TTL = 600; // 10 minutes
+
+export async function GET(
+  _request: Request,
+  { params }: { params: Promise<{ owner: string; repo: string; number: string }> }
+) {
+  const session = await auth();
+
+  if (!session?.accessToken) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+  }
+
+  const { owner, repo, number: numStr } = await params;
+  const issueNumber = parseInt(numStr, 10);
+
+  if (isNaN(issueNumber) || issueNumber < 1) {
+    return NextResponse.json({ error: "Invalid issue number" }, { status: 400 });
+  }
+
+  const cacheKey = `issue-detail:${owner}/${repo}/${issueNumber}`;
+
+  const cached = await getCached<IssueDetail>(cacheKey);
+  if (cached) {
+    return NextResponse.json(cached);
+  }
+
+  try {
+    const result = await fetchIssueDetail(owner, repo, issueNumber, session.accessToken);
+
+    await setCache(cacheKey, result, CACHE_TTL);
+    return NextResponse.json(result);
+  } catch (error) {
+    if (error instanceof RateLimitError) {
+      return NextResponse.json(
+        { error: "Rate limit exceeded", resetAt: error.resetAt },
+        { status: 429 }
+      );
+    }
+    return NextResponse.json(
+      { error: "GitHub API error" },
+      { status: 502 }
+    );
+  }
+}

src/components/ContributionCard.tsx

@@ -7,6 +7,8 @@ import { Card, CardContent } from "@/components/ui/card";
 import { cn, stateColors } from "@/lib/utils";
 import { formatDate } from "@/lib/date-utils";
 import { ExpandedPRDetail } from "@/components/ExpandedPRDetail";
+import { ExpandedReviewDetail } from "@/components/ExpandedReviewDetail";
+import { ExpandedIssueDetail } from "@/components/ExpandedIssueDetail";
 import type { ContributionDetail } from "@/lib/types";
 
 interface ContributionCardProps {
@@ -15,7 +17,7 @@ interface ContributionCardProps {
 
 export function ContributionCard({ item }: ContributionCardProps) {
   const [expanded, setExpanded] = useState(false);
-  const canExpand = item.type === "pr";
+  const canExpand = item.type === "pr" || item.type === "review" || item.type === "issue";
   const [owner, repo] = item.repoNameWithOwner.split("/");
 
   return (
@@ -65,11 +67,21 @@ export function ContributionCard({ item }: ContributionCardProps) {
             <ExternalLink className="h-4 w-4" />
           </a>
         </div>
-        {expanded && canExpand && (
+        {expanded && canExpand && item.type === "pr" && (
           <div className="mt-3">
             <ExpandedPRDetail owner={owner} repo={repo} number={item.number} />
           </div>
         )}
+        {expanded && canExpand && item.type === "review" && (
+          <div className="mt-3">
+            <ExpandedReviewDetail owner={owner} repo={repo} number={item.number} />
+          </div>
+        )}
+        {expanded && canExpand && item.type === "issue" && (
+          <div className="mt-3">
+            <ExpandedIssueDetail owner={owner} repo={repo} number={item.number} />
+          </div>
+        )}
       </CardContent>
     </Card>
   );

src/components/ContributionDrillDown.tsx

@@ -20,12 +20,13 @@ interface ContributionDrillDownProps {
 }
 
 const tabLabels = {
-  prs: "Pull Requests",
-  reviews: "Reviews",
-  issues: "Issues",
+  prs: "Authored Pull Requests",
+  reviews: "Reviewed Pull Requests",
+  issues: "Authored Issues",
+  "reviewed-issues": "Reviewed Issues",
 } as const;
 
-const tabs = ["prs", "reviews", "issues"] as const;
+const tabs = ["prs", "reviews", "issues", "reviewed-issues"] as const;
 
 export function ContributionDrillDown({
   username,
@@ -84,7 +85,7 @@ export function ContributionDrillDown({
             role="tab"
             aria-selected={filters.tab === tab}
             onClick={() => setTab(tab)}
-            className={`whitespace-nowrap flex-shrink-0 px-4 py-2 text-sm font-medium transition-colors ${
+            className={`cursor-pointer whitespace-nowrap flex-shrink-0 px-4 py-2 text-sm font-medium transition-colors ${
               filters.tab === tab
                 ? "border-b-2 border-zinc-900 text-zinc-900 dark:border-zinc-100 dark:text-zinc-100"
                 : "text-zinc-500 hover:text-zinc-700 dark:text-zinc-400 dark:hover:text-zinc-200"

src/components/ContributionTable.tsx

@@ -6,6 +6,8 @@ import { Badge } from "@/components/ui/badge";
 import { cn, stateColors } from "@/lib/utils";
 import { formatDate } from "@/lib/date-utils";
 import { ExpandedPRDetail } from "@/components/ExpandedPRDetail";
+import { ExpandedReviewDetail } from "@/components/ExpandedReviewDetail";
+import { ExpandedIssueDetail } from "@/components/ExpandedIssueDetail";
 import { EmptyState } from "@/components/EmptyState";
 import type { ContributionDetail } from "@/lib/types";
 
@@ -35,7 +37,7 @@ export function ContributionTable({ items }: ContributionTableProps) {
       {/* Data rows */}
       {items.map((item) => {
         const isExpanded = expandedId === item.id;
-        const canExpand = item.type === "pr";
+        const canExpand = item.type === "pr" || item.type === "review" || item.type === "issue";
         const [owner, repo] = item.repoNameWithOwner.split("/");
 
         return (
@@ -91,9 +93,15 @@ export function ContributionTable({ items }: ContributionTableProps) {
                 <ExternalLink className="h-4 w-4" />
               </a>
             </div>
-            {isExpanded && canExpand && (
+            {isExpanded && canExpand && item.type === "pr" && (
               <ExpandedPRDetail owner={owner} repo={repo} number={item.number} />
             )}
+            {isExpanded && canExpand && item.type === "review" && (
+              <ExpandedReviewDetail owner={owner} repo={repo} number={item.number} />
+            )}
+            {isExpanded && canExpand && item.type === "issue" && (
+              <ExpandedIssueDetail owner={owner} repo={repo} number={item.number} />
+            )}
           </div>
         );
       })}

src/components/ExpandedIssueDetail.tsx

@@ -0,0 +1,40 @@
+"use client";
+
+import { useIssueDetail } from "@/hooks/use-issue-detail";
+
+interface ExpandedIssueDetailProps {
+  owner: string;
+  repo: string;
+  number: number;
+}
+
+export function ExpandedIssueDetail({ owner, repo, number }: ExpandedIssueDetailProps) {
+  const { data, error, isLoading } = useIssueDetail(owner, repo, number);
+
+  if (isLoading) {
+    return (
+      <div role="status" aria-label="Loading issue details" className="animate-pulse p-4">
+        <div className="h-4 w-24 bg-gray-200 rounded" />
+      </div>
+    );
+  }
+
+  if (error || !data) {
+    return (
+      <div className="p-4 text-sm text-zinc-500">
+        Failed to load issue details.
+      </div>
+    );
+  }
+
+  return (
+    <div className="border-t bg-zinc-50 px-4 py-3 dark:bg-zinc-900/50" data-testid="issue-detail">
+      <div className="flex flex-wrap gap-x-6 gap-y-2 text-sm">
+        <div>
+          <span className="text-zinc-500 dark:text-zinc-400">Comments: </span>
+          <span className="font-medium">{data.commentCount}</span>
+        </div>
+      </div>
+    </div>
+  );
+}

src/components/ExpandedReviewDetail.tsx

@@ -0,0 +1,48 @@
+"use client";
+
+import { usePRDetail } from "@/hooks/use-pr-detail";
+
+interface ExpandedReviewDetailProps {
+  owner: string;
+  repo: string;
+  number: number;
+}
+
+export function ExpandedReviewDetail({ owner, repo, number }: ExpandedReviewDetailProps) {
+  const { data, error, isLoading } = usePRDetail(owner, repo, number);
+
+  if (isLoading) {
+    return (
+      <div role="status" aria-label="Loading review details" className="animate-pulse p-4">
+        <div className="flex gap-6">
+          {Array.from({ length: 2 }, (_, i) => (
+            <div key={i} className="h-4 w-16 bg-gray-200 rounded" />
+          ))}
+        </div>
+      </div>
+    );
+  }
+
+  if (error || !data) {
+    return (
+      <div className="p-4 text-sm text-zinc-500">
+        Failed to load review details.
+      </div>
+    );
+  }
+
+  return (
+    <div className="border-t bg-zinc-50 px-4 py-3 dark:bg-zinc-900/50" data-testid="review-detail">
+      <div className="flex flex-wrap gap-x-6 gap-y-2 text-sm">
+        <div>
+          <span className="text-zinc-500 dark:text-zinc-400">Reviews: </span>
+          <span className="font-medium">{data.reviewCount}</span>
+        </div>
+        <div>
+          <span className="text-zinc-500 dark:text-zinc-400">Comments: </span>
+          <span className="font-medium">{data.commentCount}</span>
+        </div>
+      </div>
+    </div>
+  );
+}

src/components/__tests__/ContributionCard.test.tsx

@@ -3,13 +3,25 @@ import { render, screen, cleanup } from "@testing-library/react";
 import { ContributionCard } from "@/components/ContributionCard";
 import type { ContributionDetail } from "@/lib/types";
 
-// Mock ExpandedPRDetail
+// Mock ExpandedPRDetail and ExpandedIssueDetail
 vi.mock("@/components/ExpandedPRDetail", () => ({
   ExpandedPRDetail: ({ number }: { number: number }) => (
     <div data-testid="pr-detail">PR Detail #{number}</div>
   ),
 }));
 
+vi.mock("@/components/ExpandedReviewDetail", () => ({
+  ExpandedReviewDetail: ({ number }: { number: number }) => (
+    <div data-testid="review-detail">Review Detail #{number}</div>
+  ),
+}));
+
+vi.mock("@/components/ExpandedIssueDetail", () => ({
+  ExpandedIssueDetail: ({ number }: { number: number }) => (
+    <div data-testid="issue-detail">Issue Detail #{number}</div>
+  ),
+}));
+
 afterEach(cleanup);
 
 const prItem: ContributionDetail = {
@@ -67,9 +79,9 @@ describe("ContributionCard", () => {
     expect(expandable).toBeInTheDocument();
   });
 
-  it("issue card has no expand button", () => {
+  it("issue card has expand button", () => {
     render(<ContributionCard item={issueItem} />);
 
-    expect(screen.queryByRole("button")).not.toBeInTheDocument();
+    expect(screen.getByRole("button")).toBeInTheDocument();
   });
 });

src/components/__tests__/ContributionDrillDown.test.tsx

@@ -86,9 +86,10 @@ describe("ContributionDrillDown", () => {
   it("renders tabs", () => {
     render(<ContributionDrillDown username="alice" bitcoinRepos={bitcoinRepos} />);
 
-    expect(screen.getByText("Pull Requests")).toBeInTheDocument();
-    expect(screen.getByText("Reviews")).toBeInTheDocument();
-    expect(screen.getByText("Issues")).toBeInTheDocument();
+    expect(screen.getByText("Authored Pull Requests")).toBeInTheDocument();
+    expect(screen.getByText("Reviewed Pull Requests")).toBeInTheDocument();
+    expect(screen.getByText("Authored Issues")).toBeInTheDocument();
+    expect(screen.getByText("Reviewed Issues")).toBeInTheDocument();
   });
 
   it("renders date filter bar", () => {
@@ -122,8 +123,11 @@ describe("ContributionDrillDown", () => {
   it("switches tabs", () => {
     render(<ContributionDrillDown username="alice" bitcoinRepos={bitcoinRepos} />);
 
-    fireEvent.click(screen.getByText("Reviews"));
+    fireEvent.click(screen.getByText("Reviewed Pull Requests"));
     expect(mockSetTab).toHaveBeenCalledWith("reviews");
+
+    fireEvent.click(screen.getByText("Reviewed Issues"));
+    expect(mockSetTab).toHaveBeenCalledWith("reviewed-issues");
   });
 
   it("shows load more when hasMore", () => {

src/components/__tests__/ContributionTable.test.tsx

@@ -3,13 +3,25 @@ import { render, screen, cleanup, fireEvent } from "@testing-library/react";
 import { ContributionTable } from "@/components/ContributionTable";
 import type { ContributionDetail } from "@/lib/types";
 
-// Mock the ExpandedPRDetail since it uses SWR
+// Mock the ExpandedPRDetail and ExpandedIssueDetail since they use SWR
 vi.mock("@/components/ExpandedPRDetail", () => ({
   ExpandedPRDetail: ({ number }: { number: number }) => (
     <div data-testid="pr-detail">PR Detail #{number}</div>
   ),
 }));
 
+vi.mock("@/components/ExpandedReviewDetail", () => ({
+  ExpandedReviewDetail: ({ number }: { number: number }) => (
+    <div data-testid="review-detail">Review Detail #{number}</div>
+  ),
+}));
+
+vi.mock("@/components/ExpandedIssueDetail", () => ({
+  ExpandedIssueDetail: ({ number }: { number: number }) => (
+    <div data-testid="issue-detail">Issue Detail #{number}</div>
+  ),
+}));
+
 import { vi } from "vitest";
 
 afterEach(cleanup);
@@ -68,11 +80,14 @@ describe("ContributionTable", () => {
     expect(screen.getByTestId("pr-detail")).toBeInTheDocument();
   });
 
-  it("does not expand issue rows", () => {
+  it("expands issue row on click", () => {
     render(<ContributionTable items={items} />);
 
-    const issueRow = screen.getByText("Add docs").closest("div");
-    expect(issueRow).not.toHaveAttribute("role", "button");
+    const row = screen.getByText("Add docs").closest("[role='button']");
+    expect(row).toBeInTheDocument();
+
+    fireEvent.click(row!);
+    expect(screen.getByTestId("issue-detail")).toBeInTheDocument();
   });
 
   it("renders column headers", () => {