feat(docs): save chat answers as docs — edit screen, commit + push to the .env docs branch

app/api/config.py

@@ -1,4 +1,5 @@
-"""Public app metadata (display name + version) for the frontend brand layer."""
+"""Public app metadata (display name + version) for the frontend brand
+layer, plus the phase-59 docs-push flag (the "Save as doc" gating)."""
 from __future__ import annotations
 
 from fastapi import APIRouter, Depends
@@ -9,6 +10,14 @@ router = APIRouter(tags=["config"])
 
 
 @router.get("/config")
-def app_config(settings: Settings = Depends(get_settings)) -> dict[str, str]:  # noqa: B008
-    """Public app metadata for the frontend brand layer (phase 39)."""
-    return {"app_name": settings.app_name, "version": settings.app_version}
+def app_config(settings: Settings = Depends(get_settings)) -> dict[str, str | bool]:  # noqa: B008
+    """Public app metadata for the frontend brand layer (phase 39) +
+    the phase-59 ``docs_repo_configured`` flag — the chat page's
+    "Save as doc" button gating, surfaced the way ``app_name`` is
+    (the SAME boot fetch, no new network surface). Inert false while
+    ``BOR_DOCS_REPO`` is empty (the feature is off, D3)."""
+    return {
+        "app_name": settings.app_name,
+        "version": settings.app_version,
+        "docs_repo_configured": settings.docs_configured,
+    }