fix: update proxy path and MQTT broker URL in dev

Change the proxy path from `/journal` to `/.ttrpg` and ensure the
MQTT broker URL points to localhost:3000 during development to
match the CLI server configuration.

rsbuild.config.ts

@@ -46,7 +46,7 @@ export default defineConfig({
       "/__CONTENT_INDEX.json": "http://localhost:3000",
       "/__COMPLETIONS.json": "http://localhost:3000",
       "/content": "http://localhost:3000",
-      "/journal": "http://localhost:3000",
+      "/.ttrpg": "http://localhost:3000",
     },
   },
   output: {

src/components/journal/ConnectDialog.tsx

@@ -40,7 +40,12 @@ export const ConnectDialog: Component = () => {
     const name = playerName().trim() || stream.myName;
     if (!name) return;
 
-    const brokerUrl = `ws://${window.location.host}`;
+    // In dev, the MQTT broker lives on the CLI server (port 3000), not the
+    // rsbuild dev server. In production, the CLI serves everything itself.
+    const brokerUrl =
+      process.env.NODE_ENV === "development"
+        ? `ws://localhost:3000`
+        : `ws://${window.location.host}`;
 
     setConnecting(true);
     setError(null);