feat(vscode): enhance server readiness with multiple URL candidates (#145)

Add support for multiple candidate base URLs in readiness check.
Automatically set API URL override upon successful server connection.

packages/ui/package.json

@@ -17,7 +17,7 @@
     "@fontsource/ibm-plex-mono": "^5.2.7",
     "@fontsource/ibm-plex-sans": "^5.1.1",
     "@ibm/plex": "^6.4.1",
-    "@opencode-ai/sdk": "^1.1.8",
+    "@opencode-ai/sdk": "^1.1.19",
     "@pierre/diffs": "^1.0.5",
     "@radix-ui/react-collapsible": "^1.1.12",
     "@radix-ui/react-dialog": "^1.1.15",