fix: include access token in auto-opened dashboard URL

CLI --open overrides server.open config, stripping the token. Remove
--open from CLI and set server.open to /?token= so the browser opens
with the access token already included.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

understand-anything-plugin/packages/dashboard/vite.config.ts

@@ -16,6 +16,7 @@ export default defineConfig({
   server: {
     host: "127.0.0.1",
     port: 5173,
+    open: `/?token=${ACCESS_TOKEN}`,
   },
 
   resolve: {

understand-anything-plugin/skills/understand-dashboard/SKILL.md

@@ -56,7 +56,7 @@ Start the Understand Anything dashboard to visualize the knowledge graph for the
 
 5. Start the Vite dev server pointing at the project's knowledge graph:
    ```bash
-   cd <dashboard-dir> && GRAPH_DIR=<project-dir> npx vite --host 127.0.0.1 --open
+   cd <dashboard-dir> && GRAPH_DIR=<project-dir> npx vite --host 127.0.0.1
    ```
    Run this in the background so the user can continue working.