fix(gitea): normalize "." path to empty string in ListContents

Gitea API rejects "." with HTTP 500 (malformed path component).
When patterns-files is set to ".", normalize it to empty string
before making the API call.

Fixes #70

gitea/client.go

@@ -435,6 +435,10 @@ type ContentEntry struct {
 // ListContents lists files and directories at a given path in a repo.
 // Pass an empty path to list the repository root.
 func (c *Client) ListContents(ctx context.Context, owner, repo, path string) ([]ContentEntry, error) {
+	// Normalize "." to empty string — Gitea API rejects "." with 500
+	if path == "." {
+		path = ""
+	}
 	var reqURL string
 	if path == "" {
 		reqURL = fmt.Sprintf("%s/api/v1/repos/%s/%s/contents", c.baseURL, url.PathEscape(owner), url.PathEscape(repo))

gitea/client_test.go

@@ -280,6 +280,30 @@ func TestListContents(t *testing.T) {
 	}
 }
 
+func TestListContents_DotPath(t *testing.T) {
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// "." should be normalized to empty path, which hits the root contents endpoint
+		if r.URL.Path != "/api/v1/repos/owner/repo/contents" {
+			t.Errorf("expected root contents path, got: %s", r.URL.Path)
+		}
+		w.Header().Set("Content-Type", "application/json")
+		fmt.Fprintf(w, `[{"name":"README.md","path":"README.md","type":"file"}]`)
+	}))
+	defer server.Close()
+
+	client := NewClient(server.URL, "test-token")
+	entries, err := client.ListContents(context.Background(), "owner", "repo", ".")
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+	if len(entries) != 1 {
+		t.Fatalf("expected 1 entry, got %d", len(entries))
+	}
+	if entries[0].Name != "README.md" {
+		t.Errorf("expected README.md, got %s", entries[0].Name)
+	}
+}
+
 func TestGetAllFilesInPath_File(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if r.URL.Path == "/api/v1/repos/owner/repo/contents/README.md" {