Index: src/middleware/render.js
===================================================================
--- src/middleware/render.js	(revision 69815b232bc91b7504ea8b28d3e2f66949f216ed)
+++ src/middleware/render.js	(revision 3d7312ab39fe3619ae0a9b953d94789dded655a0)
@@ -73,4 +73,10 @@
     const _fresh = db.prepare('SELECT avatar_url, role, lang FROM users WHERE id = ?').get(_u.id);
     if (_fresh) _u = { ..._u, avatar_url: _fresh.avatar_url, role: _fresh.role, lang: _fresh.lang };
+    // One identity: no own account avatar → fall back to the user's site photo,
+    // so the same picture shows everywhere (nav, account, comments).
+    if (_u && !_u.avatar_url) {
+      const _sp = db.prepare("SELECT profile_photo FROM sites WHERE owner_id = ? AND profile_photo IS NOT NULL ORDER BY is_primary DESC, created_at ASC LIMIT 1").get(_u.id);
+      if (_sp && _sp.profile_photo) _u = { ..._u, avatar_url: _sp.profile_photo };
+    }
   }
   const userOwnsSite = !!(_u && _u.role !== 'god' &&