Chat theme: dots layer CSS + boot watchdog (Open WebUI startup overwrites custom.css; serve as coop.css + import)

chat-theme/openwebui-custom.css

@@ -132,3 +132,12 @@ html.dark ::selection { background: #3e5a3d; }
 /* ---------- Links ---------- */
 html:not(.dark) a { color: #3f6e3e; }
 html.dark a { color: #8fc98f; }
+
+/* ---------- Background dots (homepage motif echo) ---------- */
+/* Fixed layer of light green + bronze dots, varied sizes, gentle parallax on
+   scroll. Rendered behind all app content (z-index 0). */
+#coop-dots-layer { position: fixed; inset: 0; z-index: 0; pointer-events: none; }
+#coop-dots-layer circle { opacity: 0.28; }
+#coop-dots-layer circle.big { opacity: 0.22; }
+html.dark #coop-dots-layer circle { opacity: 0.16; }
+html.dark #coop-dots-layer circle.big { opacity: 0.13; }