feat: 添加 Docker 部署支持和多 OCR 提供商架构

- 添加完整的 Docker 配置 (Dockerfile, docker-compose.yml)
- 修复前端硬编码端口 4000，改用相对路径 /api
- 实现多 OCR 提供商架构 (Tesseract.js/Baidu/RapidOCR)
- 修复 Docker 环境中图片上传路径问题
- 添加用户设置页面和 AI 分析服务
- 更新 Prisma schema 支持 AI 分析结果
- 添加部署文档和 OCR 配置指南

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/package-lock.json

@@ -16,7 +16,6 @@
         "express": "^4.21.2",
         "jsonwebtoken": "^9.0.2",
         "multer": "^1.4.5-lts.1",
-        "tesseract.js": "^5.1.1",
         "winston": "^3.17.0"
       },
       "devDependencies": {
@@ -1786,14 +1785,14 @@
       "version": "5.22.0",
       "resolved": "https://registry.npmjs.org/@prisma/debug/-/debug-5.22.0.tgz",
       "integrity": "sha512-AUt44v3YJeggO2ZU5BkXI7M4hu9BF2zzH2iF2V5pyXT/lRTyWiElZ7It+bRH1EshoMRxHgpYg4VB6rCM+mG5jQ==",
-      "devOptional": true,
+      "dev": true,
       "license": "Apache-2.0"
     },
     "node_modules/@prisma/engines": {
       "version": "5.22.0",
       "resolved": "https://registry.npmjs.org/@prisma/engines/-/engines-5.22.0.tgz",
       "integrity": "sha512-UNjfslWhAt06kVL3CjkuYpHAWSO6L4kDCVPegV6itt7nD1kSJavd3vhgAEhjglLJJKEdJ7oIqDJ+yHk6qO8gPA==",
-      "devOptional": true,
+      "dev": true,
       "hasInstallScript": true,
       "license": "Apache-2.0",
       "dependencies": {
@@ -1807,14 +1806,14 @@
       "version": "5.22.0-44.605197351a3c8bdd595af2d2a9bc3025bca48ea2",
       "resolved": "https://registry.npmjs.org/@prisma/engines-version/-/engines-version-5.22.0-44.605197351a3c8bdd595af2d2a9bc3025bca48ea2.tgz",
       "integrity": "sha512-2PTmxFR2yHW/eB3uqWtcgRcgAbG1rwG9ZriSvQw+nnb7c4uCr3RAcGMb6/zfE88SKlC1Nj2ziUvc96Z379mHgQ==",
-      "devOptional": true,
+      "dev": true,
       "license": "Apache-2.0"
     },
     "node_modules/@prisma/fetch-engine": {
       "version": "5.22.0",
       "resolved": "https://registry.npmjs.org/@prisma/fetch-engine/-/fetch-engine-5.22.0.tgz",
       "integrity": "sha512-bkrD/Mc2fSvkQBV5EpoFcZ87AvOgDxbG99488a5cexp5Ccny+UM6MAe/UFkUC0wLYD9+9befNOqGiIJhhq+HbA==",
-      "devOptional": true,
+      "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
         "@prisma/debug": "5.22.0",
@@ -1826,7 +1825,7 @@
       "version": "5.22.0",
       "resolved": "https://registry.npmjs.org/@prisma/get-platform/-/get-platform-5.22.0.tgz",
       "integrity": "sha512-pHhpQdr1UPFpt+zFfnPazhulaZYCUqeIcPpJViYoq9R+D/yw4fjE+CtnsnKzPYm0ddUbeXUzjGVGIRVgPDCk4Q==",
-      "devOptional": true,
+      "dev": true,
       "license": "Apache-2.0",
       "dependencies": {
         "@prisma/debug": "5.22.0"
@@ -6509,7 +6508,7 @@
       "version": "5.22.0",
       "resolved": "https://registry.npmjs.org/prisma/-/prisma-5.22.0.tgz",
       "integrity": "sha512-vtpjW3XuYCSnMsNVBjLMNkTj6OZbudcPPTPYHqX0CJfpcdWciI1dM8uHETwmDxxiqEwCIE6WvXucWUetJgfu/A==",
-      "devOptional": true,
+      "dev": true,
       "hasInstallScript": true,
       "license": "Apache-2.0",
       "dependencies": {