feat(tauri): 摄像头/麦克风权限配置（macOS 授权一次 + Windows 兼容）

- Info.plist：NSCameraUsageDescription / NSMicrophoneUsageDescription（授权一次后不再询问）
- tauri.conf.json：macOSPrivateApi + WebView2 autoplay 允许（自动问候语音不被拦）+ nsis/app/dmg 双平台打包
- Cargo.toml：tauri 启用 macos-private-api feature

src-tauri/Cargo.toml

@@ -13,7 +13,7 @@ crate-type = ["staticlib", "cdylib", "rlib"]
 tauri-build = { version = "2", features = [] }
 
 [dependencies]
-tauri = { version = "2", features = [] }
+tauri = { version = "2", features = ["macos-private-api"] }
 tauri-plugin-opener = "2"
 tauri-plugin-autostart = "2"
 serde = { version = "1", features = ["derive"] }

src-tauri/Info.plist

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+  <!-- 摄像头：大屏前的实时识别（人脸/姿态检测、手势控制）。声明后 macOS 仅首次授权一次 -->
+  <key>NSCameraUsageDescription</key>
+  <string>用于大屏前的摄像头实时识别（人脸检测、手势控制），画面仅在本机处理，不对外传输。</string>
+  <!-- 麦克风：语音对话（实时语音识别与合成） -->
+  <key>NSMicrophoneUsageDescription</key>
+  <string>用于实时语音对话（语音识别与合成），音频仅在本机处理。</string>
+</dict>
+</plist>

src-tauri/tauri.conf.json

@@ -10,12 +10,14 @@
     "frontendDist": "../dist"
   },
   "app": {
+    "macOSPrivateApi": true,
     "windows": [
       {
         "title": "昆明大学生创业园展播系统",
         "width": 1200,
         "height": 800,
-        "fullscreen": true
+        "fullscreen": true,
+        "additionalBrowserArgs": "--autoplay-policy=no-user-gesture-required --enable-features=WebRtcHideLocalIpsWithMdns"
       }
     ],
     "security": {
@@ -24,7 +26,10 @@
   },
   "bundle": {
     "active": true,
-    "targets": ["nsis"],
+    "targets": ["nsis", "app", "dmg"],
+    "macOS": {
+      "minimumSystemVersion": "10.15"
+    },
     "icon": [
       "icons/32x32.png",
       "icons/128x128.png",