feat: 添加 Tauri Mac 原生应用支持

- 新增 mac-app/ 目录：Tauri 项目结构（Rust 外壳 + sidecar 进程管理）
- 前端添加 Tauri 环境检测，API 调用和 WebSocket 自动适配
- 后端支持 MEETING_DATA_DIR 环境变量指定数据目录
- 新增 /api/meetings/{id}/retranscribe 接口用于重新转录
- 修复轮询超时：2分钟→30分钟，适配长音频
- 添加 .gitignore 排除构建产物

mac-app/src-tauri/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "meeting-recorder"
+version = "1.0.0"
+description = "智能会议记录系统"
+authors = ["freedak"]
+edition = "2021"
+
+[lib]
+name = "meeting_recorder_lib"
+crate-type = ["staticlib", "cdylib", "rlib"]
+
+[build-dependencies]
+tauri-build = { version = "2", features = [] }
+
+[dependencies]
+tauri = { version = "2", features = [] }
+tauri-plugin-shell = "2"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+dirs = "5"

mac-app/src-tauri/Info.plist

@@ -0,0 +1,10 @@
+<?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>
+    <key>NSMicrophoneUsageDescription</key>
+    <string>需要麦克风权限以录制会议音频</string>
+    <key>NSAudioUsageDescription</key>
+    <string>需要音频权限以处理会议录音</string>
+</dict>
+</plist>

mac-app/src-tauri/build.rs

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

mac-app/src-tauri/capabilities/default.json

@@ -0,0 +1,13 @@
+{
+  "identifier": "default",
+  "description": "Default capability for Meeting Recorder",
+  "windows": ["main"],
+  "permissions": [
+    "core:default",
+    "core:window:allow-close",
+    "core:window:allow-destroy",
+    "shell:allow-spawn",
+    "shell:allow-execute",
+    "shell:allow-kill"
+  ]
+}

mac-app/src-tauri/icons/README.txt

@@ -0,0 +1,11 @@
+# 此目录存放 Tauri 应用图标
+# 构建前需要放入以下文件:
+#   - 32x32.png
+#   - 128x128.png
+#   - 128x128@2x.png
+#   - icon.icns
+#
+# 可以使用 Tauri 的图标生成工具:
+#   npx @tauri-apps/cli icon path/to/your/icon.png
+#
+# 或从 https://tauri.app/v1/guides/build/icons/ 了解更多

mac-app/src-tauri/icons/android/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+  <foreground android:drawable="@mipmap/ic_launcher_foreground"/>
+  <background android:drawable="@color/ic_launcher_background"/>
+</adaptive-icon>

mac-app/src-tauri/icons/android/values/ic_launcher_background.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <color name="ic_launcher_background">#fff</color>
+</resources>

mac-app/src-tauri/src/lib.rs

@@ -0,0 +1,89 @@
+use tauri::Manager;
+use tauri_plugin_shell::ShellExt;
+use tauri_plugin_shell::process::CommandEvent;
+use std::sync::Mutex;
+use std::path::PathBuf;
+
+struct BackendState {
+    child: Option<tauri_plugin_shell::process::CommandChild>,
+}
+
+fn get_app_data_dir(app: &tauri::AppHandle) -> PathBuf {
+    let dir = app
+        .path()
+        .app_data_dir()
+        .unwrap_or_else(|_| {
+            dirs::data_dir().unwrap_or_else(|| PathBuf::from("."))
+        });
+    std::fs::create_dir_all(&dir).ok();
+    dir
+}
+
+#[tauri::command]
+fn kill_backend(state: tauri::State<'_, Mutex<BackendState>>) {
+    if let Some(child) = state.lock().unwrap().child.take() {
+        let _ = child.kill();
+    }
+}
+
+#[tauri::command]
+fn get_backend_url() -> String {
+    "http://localhost:8501".to_string()
+}
+
+#[cfg_attr(mobile, tauri::mobile_entry_point)]
+pub fn run() {
+    tauri::Builder::default()
+        .plugin(tauri_plugin_shell::init())
+        .manage(Mutex::new(BackendState { child: None }))
+        .setup(|app| {
+            let app_data_dir = get_app_data_dir(&app.handle());
+            let data_dir_str = app_data_dir.to_string_lossy().to_string();
+
+            println!("[tauri] App data dir: {}", data_dir_str);
+
+            let sidecar_command = app
+                .shell()
+                .sidecar("meeting-backend")
+                .expect("failed to find meeting-backend sidecar binary")
+                .env("MEETING_DATA_DIR", &data_dir_str);
+
+            let (mut rx, child) = sidecar_command
+                .spawn()
+                .expect("failed to spawn meeting-backend sidecar");
+
+            let state: tauri::State<'_, Mutex<BackendState>> = app.state();
+            state.lock().unwrap().child = Some(child);
+
+            tauri::async_runtime::spawn(async move {
+                while let Some(event) = rx.recv().await {
+                    match event {
+                        CommandEvent::Stdout(line) => {
+                            println!("[backend] {}", String::from_utf8_lossy(&line))
+                        }
+                        CommandEvent::Stderr(line) => {
+                            eprintln!("[backend] {}", String::from_utf8_lossy(&line))
+                        }
+                        CommandEvent::Terminated(payload) => {
+                            eprintln!("[backend] terminated: {:?}", payload);
+                            break;
+                        }
+                        _ => {}
+                    }
+                }
+            });
+
+            Ok(())
+        })
+        .on_window_event(|window, event| {
+            if let tauri::WindowEvent::Destroyed = event {
+                let state: tauri::State<'_, Mutex<BackendState>> = window.state();
+                if let Some(child) = state.lock().unwrap().child.take() {
+                    let _ = child.kill();
+                };
+            }
+        })
+        .invoke_handler(tauri::generate_handler![kill_backend, get_backend_url])
+        .run(tauri::generate_context!())
+        .expect("error while running tauri application");
+}

mac-app/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() {
+    meeting_recorder_lib::run()
+}

mac-app/src-tauri/tauri.conf.json

@@ -0,0 +1,44 @@
+{
+  "$schema": "https://raw.githubusercontent.com/tauri-apps/tauri/dev/crates/tauri-config-schema/schema.json",
+  "productName": "Meeting Recorder",
+  "version": "1.0.0",
+  "identifier": "com.meeting.recorder",
+  "build": {
+    "frontendDist": "../../frontend/dist",
+    "devUrl": "http://localhost:3000",
+    "beforeDevCommand": "cd ../frontend && npm run dev",
+    "beforeBuildCommand": "cd ../frontend && npm run build"
+  },
+  "app": {
+    "windows": [
+      {
+        "title": "智能会议记录系统",
+        "width": 1200,
+        "height": 800,
+        "minWidth": 900,
+        "minHeight": 600,
+        "resizable": true,
+        "fullscreen": false
+      }
+    ],
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": ["dmg", "app"],
+    "externalBin": ["binaries/meeting-backend"],
+    "resources": [],
+    "macOS": {
+      "minimumSystemVersion": "12.0",
+      "infoPlist": "Info.plist"
+    },
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns"
+    ]
+  }
+}