fix: extract text-content for option name and iteration title in map path

The generic map decoding path for project field values treated 'name'
(ProjectV2FieldOption) and 'title' (ProjectV2FieldIteration) as plain
strings, but the GitHub API returns them as ProjectV2TextContent objects
with raw/html fields. As a result, single-select option names and
iteration titles could be returned empty when values reached the
minimal converter as map[string]any instead of typed structs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SamMorrowDrums

pkg/github/minimal_types.go

@@ -1143,7 +1143,7 @@ func minimalProjectTextValue(value map[string]any) string {
 }
 
 func minimalProjectOptionFromMap(value map[string]any) (minimalProjectOptionValue, bool) {
-	name := stringFromMap(value, "name")
+	name := textContentStringFromMap(value, "name")
 	color := stringFromMap(value, "color")
 	if name == "" && color == "" {
 		return minimalProjectOptionValue{}, false
@@ -1163,12 +1163,25 @@ func minimalProjectIterationFromMap(value map[string]any) (minimalProjectIterati
 	}
 	return minimalProjectIterationValue{
 		ID:        stringFromMap(value, "id"),
-		Title:     stringFromMap(value, "title"),
+		Title:     textContentStringFromMap(value, "title"),
 		StartDate: startDate,
 		Duration:  duration,
 	}, true
 }
 
+// textContentStringFromMap returns a string for a field that may be either a
+// plain string or a nested ProjectV2TextContent object (with raw/html/text
+// fields), as returned for project option names and iteration titles.
+func textContentStringFromMap(value map[string]any, key string) string {
+	if s := stringFromMap(value, key); s != "" {
+		return s
+	}
+	if nested, ok := value[key].(map[string]any); ok {
+		return minimalProjectTextValue(nested)
+	}
+	return ""
+}
+
 func minimalProjectPullRequestRefsFromArray(values []any) ([]minimalProjectPullRequestRef, bool) {
 	refs := make([]minimalProjectPullRequestRef, 0, len(values))
 	for _, value := range values {