feat(config): enhance scratchpad toggles, add workspace rules, adjust opacity and font size

dot_omp/private_agent/private_mcp.json

@@ -18,6 +18,13 @@
       "oauth": {
         "clientId": "TOBx2IoGZW-gU-f_"
       }
+    },
+    "github": {
+      "type": "http",
+      "url": "https://api.githubcopilot.com/mcp/",
+      "headers": {
+        "Authorization": "!printf 'Bearer %s' \"$(gh auth token)\""
+      }
     }
   }
 }