新增: Tauri 2.0 桌面版脚手架(B0)

- src-tauri/ 完整项目结构: Cargo.toml / build.rs / tauri.conf.json
- Rust 入口 lib.rs: ping IPC 命令验证双向通信
- 应用图标生成(SVG → ico/icns/png 多尺寸)
- Tauri 窗口配置: 1280×800, 最小 900×600, 可缩放
- package.json 新增 tauri / tauri:dev / tauri:build 脚本
- vite.config.ts 环境检测: Tauri 模式端口 5173, Web 模式 8080
- @tauri-apps/cli + @tauri-apps/api 依赖安装
- cargo check 编译通过,前端构建不受影响
- 桌面版与 Web 版共享同一套前端代码

src-tauri/Cargo.toml

@@ -0,0 +1,19 @@
+[package]
+name = "u-ppt"
+version = "1.0.0"
+description = "在线演示工具 - 桌面版"
+authors = ["u-ppt"]
+edition = "2021"
+rust-version = "1.77"
+
+[lib]
+name = "u_ppt_lib"
+crate-type = ["staticlib", "cdylib", "rlib"]
+
+[build-dependencies]
+tauri-build = { version = "2", features = [] }
+
+[dependencies]
+tauri = { version = "2", features = [] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"

src-tauri/app-icon.svg

@@ -0,0 +1,10 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="512" height="512" viewBox="0 0 512 512">
+  <rect width="512" height="512" rx="96" fill="#4f46e5"/>
+  <rect x="128" y="120" width="256" height="272" rx="16" fill="#fff"/>
+  <rect x="160" y="160" width="192" height="8" rx="4" fill="#4f46e5"/>
+  <rect x="160" y="184" width="160" height="6" rx="3" fill="#c7d2fe"/>
+  <rect x="160" y="204" width="176" height="6" rx="3" fill="#c7d2fe"/>
+  <rect x="160" y="224" width="128" height="6" rx="3" fill="#c7d2fe"/>
+  <circle cx="272" cy="312" r="40" fill="#06b6d4"/>
+  <rect x="150" y="300" width="80" height="56" rx="8" fill="#818cf8"/>
+</svg>

src-tauri/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    tauri_build::build()
+}

src-tauri/src/lib.rs

@@ -0,0 +1,19 @@
+/* =====================================================================
+ * lib.rs — Tauri 应用入口（B0 脚手架）
+ *
+ * 当前阶段：Vue 前端原样跑在 WebView 里，Rust 端只有 ping 验证 IPC。
+ * 后续 B1-B5 逐步迁移核心逻辑到 Rust。
+ * ===================================================================== */
+
+/// IPC 验证命令：前端 invoke('ping') → 返回 'pong'
+#[tauri::command]
+fn ping() -> String {
+    "pong".to_string()
+}
+
+pub fn run() {
+    tauri::Builder::default()
+        .invoke_handler(tauri::generate_handler![ping])
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}

src-tauri/src/main.rs

@@ -0,0 +1,6 @@
+// Prevents additional console window on Windows in release, DO NOT REMOVE!!
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+fn main() {
+    u_ppt_lib::run()
+}

src-tauri/tauri.conf.json

@@ -0,0 +1,39 @@
+{
+  "$schema": "https://schema.tauri.app/config/2",
+  "productName": "u-ppt",
+  "version": "1.0.0",
+  "identifier": "com.uppt.desktop",
+  "build": {
+    "frontendDist": "../dist",
+    "devUrl": "http://localhost:5173",
+    "beforeDevCommand": "npm run dev",
+    "beforeBuildCommand": "npm run build"
+  },
+  "app": {
+    "windows": [
+      {
+        "title": "u-ppt · 在线演示工具",
+        "width": 1280,
+        "height": 800,
+        "minWidth": 900,
+        "minHeight": 600,
+        "resizable": true,
+        "fullscreen": false
+      }
+    ],
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": "all",
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ]
+  }
+}