feat(collector): add RepoData dataclass and collect_all (fixes #2)

- RepoData dataclass with all repo fields
- collect_all enriches each repo with release and milestones
- Computes open_issues = open_issues_count - open_pr_counter
- 6 unit tests with mocked GiteaClient

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_collector.py

@@ -0,0 +1,130 @@
+"""Tests for data collector."""
+
+from unittest.mock import MagicMock
+
+from gitea_dashboard.collector import RepoData, collect_all
+
+
+def _make_repo(
+    name="my-repo",
+    full_name="admin/my-repo",
+    description="A repo",
+    open_issues_count=5,
+    open_pr_counter=2,
+    fork=False,
+    archived=False,
+    mirror=False,
+    owner_login="admin",
+):
+    """Build a fake repo dict as returned by the Gitea API."""
+    return {
+        "name": name,
+        "full_name": full_name,
+        "description": description,
+        "open_issues_count": open_issues_count,
+        "open_pr_counter": open_pr_counter,
+        "fork": fork,
+        "archived": archived,
+        "mirror": mirror,
+        "owner": {"login": owner_login},
+    }
+
+
+class TestCollectAll:
+    """Test collect_all function."""
+
+    def test_basic_repo(self):
+        """Collects repo data with release and milestones."""
+        client = MagicMock()
+        client.get_repos.return_value = [_make_repo()]
+        client.get_latest_release.return_value = {
+            "tag_name": "v1.0",
+            "published_at": "2026-01-01",
+        }
+        client.get_milestones.return_value = [
+            {"title": "v2.0", "open_issues": 3, "closed_issues": 2, "due_on": None},
+        ]
+
+        result = collect_all(client)
+
+        assert len(result) == 1
+        repo = result[0]
+        assert isinstance(repo, RepoData)
+        assert repo.name == "my-repo"
+        assert repo.full_name == "admin/my-repo"
+        assert repo.description == "A repo"
+        assert repo.open_issues == 3  # 5 - 2
+        assert repo.is_fork is False
+        assert repo.is_archived is False
+        assert repo.is_mirror is False
+        assert repo.latest_release == {"tag_name": "v1.0", "published_at": "2026-01-01"}
+        assert len(repo.milestones) == 1
+
+    def test_repo_without_release(self):
+        """Repo with no release gets None for latest_release."""
+        client = MagicMock()
+        client.get_repos.return_value = [_make_repo()]
+        client.get_latest_release.return_value = None
+        client.get_milestones.return_value = []
+
+        result = collect_all(client)
+
+        assert result[0].latest_release is None
+
+    def test_repo_without_milestones(self):
+        """Repo with no milestones gets empty list."""
+        client = MagicMock()
+        client.get_repos.return_value = [_make_repo()]
+        client.get_latest_release.return_value = None
+        client.get_milestones.return_value = []
+
+        result = collect_all(client)
+
+        assert result[0].milestones == []
+
+    def test_open_issues_subtracts_prs(self):
+        """open_issues = open_issues_count - open_pr_counter."""
+        client = MagicMock()
+        client.get_repos.return_value = [
+            _make_repo(open_issues_count=10, open_pr_counter=4),
+        ]
+        client.get_latest_release.return_value = None
+        client.get_milestones.return_value = []
+
+        result = collect_all(client)
+
+        assert result[0].open_issues == 6
+
+    def test_multiple_repos(self):
+        """Collects data for multiple repos."""
+        client = MagicMock()
+        client.get_repos.return_value = [
+            _make_repo(name="repo-a", full_name="admin/repo-a"),
+            _make_repo(name="repo-b", full_name="org/repo-b", owner_login="org"),
+        ]
+        client.get_latest_release.return_value = None
+        client.get_milestones.return_value = []
+
+        result = collect_all(client)
+
+        assert len(result) == 2
+        assert result[0].name == "repo-a"
+        assert result[1].name == "repo-b"
+        # Verify correct owner/repo passed to enrichment calls
+        client.get_latest_release.assert_any_call("admin", "repo-a")
+        client.get_latest_release.assert_any_call("org", "repo-b")
+
+    def test_fork_and_archived_flags(self):
+        """Fork and archived flags are propagated."""
+        client = MagicMock()
+        client.get_repos.return_value = [
+            _make_repo(fork=True, archived=True, mirror=True),
+        ]
+        client.get_latest_release.return_value = None
+        client.get_milestones.return_value = []
+
+        result = collect_all(client)
+
+        assert result[0].is_fork is True
+        assert result[0].is_archived is True
+        assert result[0].is_mirror is True