feat: add the two-tier dashboard (task 0017)

Wire the bare `gitea-axi` home command to a two-tier repository
dashboard (ADR 0012): the short tier shows up to 3 open issues and 3
open PRs with the client-side `review` decision, and `--full` shows the
20-row open-PR table plus open issue counts grouped by label, aggregated
across every page of open issues up to the 1000-issue cap with a `+`
suffix when capped. Empty states render the raw `prs: 0 open` /
`issues: 0 open` strings; issue fetches pass `type=issues`; outside a
Gitea repo the dashboard errors with REPO_NOT_FOUND.

`paginate.ts` now reports whether pagination stopped at the cap, which
drives the label-count `+` suffix.

test/detection.test.ts

@@ -159,6 +159,21 @@ describe("repository context detection", () => {
     expect(stdout).toContain("code: REPO_NOT_FOUND");
   });
 
+  it("shows REPO_NOT_FOUND with -R/--login help for the bare dashboard outside a Gitea repo", async () => {
+    const cwd = makeRepo(undefined);
+    const bin = makeSandbox({ logins: [] });
+
+    const { stdout, exitCode } = await runCliTest([], {
+      env: { PATH: bin },
+      cwd,
+    });
+
+    expect(exitCode).toBe(1);
+    expect(stdout).toContain("code: REPO_NOT_FOUND");
+    expect(stdout).toContain("-R");
+    expect(stdout).toContain("--login");
+  });
+
   it("fails with TEA_NOT_INSTALLED when the tea binary is missing", async () => {
     const cwd = makeRepo("https://gitea.example.com/testowner/testrepo.git");
     const bin = makeSandbox({ tea: false });