Add: just commands for release build

frontend/tauri-ui/src/main.tsx

@@ -2,11 +2,10 @@ import React from "react";
 import ReactDOM from "react-dom/client";
 import { invoke } from "@tauri-apps/api/core";
 import { listen } from "@tauri-apps/api/event";
+import { getCurrentWindow } from "@tauri-apps/api/window";
 import { PixiPetRenderer, type UiSpritePack, type UiSnapshot } from "./renderer/pixi_pet";
 import "./styles.css";
 
-const UI_BUILD_MARKER = "issue2-fix3";
-
 function App(): JSX.Element {
   const [snapshot, setSnapshot] = React.useState<UiSnapshot | null>(null);
   const [error, setError] = React.useState<string | null>(null);
@@ -56,12 +55,20 @@ function App(): JSX.Element {
     };
   }, []);
 
+  const onMouseDown = React.useCallback((event: React.MouseEvent<HTMLElement>) => {
+    if (event.button !== 0) {
+      return;
+    }
+    void getCurrentWindow().startDragging().catch((err) => {
+      setError(String(err));
+    });
+  }, []);
+
   return (
-    <main className="app">
+    <main className="app" onMouseDown={onMouseDown}>
       <div className="canvas-host" ref={hostRef} />
       <section className="debug-panel">
         <h1>sprimo-tauri</h1>
-        <p>ui build: {UI_BUILD_MARKER}</p>
         {error !== null ? <p className="error">{error}</p> : null}
         {snapshot === null ? (
           <p>Loading snapshot...</p>