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/scripts/build.sh

@@ -0,0 +1,48 @@
+#!/bin/bash
+# 一键构建 Mac App
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+APP_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+echo "=========================================="
+echo "  智能会议记录系统 - Mac App 构建"
+echo "=========================================="
+
+# 检查 Rust
+if ! command -v rustc &> /dev/null; then
+    echo "❌ Rust 未安装，请先安装: https://rustup.rs"
+    exit 1
+fi
+
+# 检查 PyInstaller
+if ! command -v pyinstaller &> /dev/null && ! python3 -m PyInstaller --version &> /dev/null 2>&1; then
+    echo "❌ PyInstaller 未安装，请运行: pip3 install pyinstaller"
+    exit 1
+fi
+
+# 检查 Node.js
+if ! command -v node &> /dev/null; then
+    echo "❌ Node.js 未安装"
+    exit 1
+fi
+
+echo ""
+echo "步骤 1/3: 构建前端..."
+bash "$SCRIPT_DIR/build_frontend.sh"
+
+echo ""
+echo "步骤 2/3: 构建后端 sidecar..."
+bash "$SCRIPT_DIR/build_backend.sh"
+
+echo ""
+echo "步骤 3/3: 构建 Tauri App..."
+cd "$APP_DIR"
+npm install
+npm run build
+
+echo ""
+echo "=========================================="
+echo "  ✅ 构建完成!"
+echo "  DMG 文件位于: $APP_DIR/src-tauri/target/release/bundle/dmg/"
+echo "=========================================="

mac-app/scripts/build_backend.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+# 构建后端 sidecar 二进制文件 (PyInstaller)
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
+BUILD_DIR="$SCRIPT_DIR/../dist"
+
+echo "=== 构建后端 sidecar (PyInstaller) ==="
+echo "项目根目录: $PROJECT_ROOT"
+echo "构建输出: $BUILD_DIR"
+
+# 清理旧构建
+rm -rf "$BUILD_DIR/backend"
+mkdir -p "$BUILD_DIR/backend"
+
+# 获取当前平台 target triple
+TARGET_TRIPLE=$(rustc -vV 2>/dev/null | grep host | awk '{print $2}')
+if [ -z "$TARGET_TRIPLE" ]; then
+    # 默认 Apple Silicon
+    TARGET_TRIPLE="aarch64-apple-darwin"
+fi
+echo "目标平台: $TARGET_TRIPLE"
+
+# 使用 PyInstaller 打包
+cd "$PROJECT_ROOT"
+
+pyinstaller \
+    --onefile \
+    --name "meeting-backend" \
+    --distpath "$BUILD_DIR/backend" \
+    --workpath "$BUILD_DIR/backend/build" \
+    --specpath "$BUILD_DIR/backend" \
+    --add-data "database.py:." \
+    --add-data "processor.py:." \
+    --add-data "audio_utils.py:." \
+    --hidden-import funasr \
+    --hidden-import funasr.auto \
+    --hidden-import soundfile \
+    --hidden-import pydub \
+    --hidden-import sqlalchemy \
+    --hidden-import openai \
+    --collect-all funasr \
+    --collect-all torch \
+    --collect-all torchaudio \
+    --noconfirm \
+    main.py
+
+# 复制到 Tauri sidecar 目录，加上 target triple 后缀
+SIDECAR_DIR="$SCRIPT_DIR/../src-tauri/binaries"
+mkdir -p "$SIDECAR_DIR"
+cp "$BUILD_DIR/backend/meeting-backend" "$SIDECAR_DIR/meeting-backend-$TARGET_TRIPLE"
+chmod +x "$SIDECAR_DIR/meeting-backend-$TARGET_TRIPLE"
+
+echo "=== 后端构建完成 ==="
+echo "Sidecar 二进制: $SIDECAR_DIR/meeting-backend-$TARGET_TRIPLE"

mac-app/scripts/build_frontend.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+# 构建前端 (Vite build)
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+FRONTEND_DIR="$(cd "$SCRIPT_DIR/../../frontend" && pwd)"
+
+echo "=== 构建前端 (Vite) ==="
+echo "前端目录: $FRONTEND_DIR"
+
+cd "$FRONTEND_DIR"
+npm run build
+
+echo "=== 前端构建完成 ==="
+echo "输出目录: $FRONTEND_DIR/dist"