Branding fix: inject custom.css via source patch and add auto‑load JS

assets/custom.js

@@ -0,0 +1,8 @@
+// Auto‑load saved image generation API key into the MCP input field
+window.addEventListener('load', () => {
+  const savedKey = localStorage.getItem('image_api_key');
+  if (savedKey) {
+    const icInput = document.querySelector('input[name="IC_API_KEY"]');
+    if (icInput) icInput.value = savedKey;
+  }
+});