feat: 品牌升级(知冶→战知) + 应用工具广场重构 + 新增工具集成

品牌升级：
- 全站品牌从"知冶"更名为"战知"
- 更换 favicon、侧边栏 logo、登录页 logo
- 更新登录页标语和首页欢迎语

应用广场重构：
- 从后端数据库驱动改为前端静态配置，按分类 tab 展示
- 新增工具卡片 UI，支持 logo 图片和 emoji 图标

新增工具部署：
- Stirling PDF (端口18080) - PDF 处理工具箱
- Excalidraw (端口18081) - 手绘风格白板，集成 AI 绘图
- TrWebOCR (端口18083) - 中文离线 OCR
- LibreTranslate (端口18084) - 中英翻译引擎
- PPTist (端口18085) - 在线 PPT 编辑器
- PPTist AI 后端 (端口18086) - 对接 deepseek-v3 生成大纲/PPT/写作
- Excalidraw AI 代理 (端口18082) - 对接 deepseek-v3 生成 Mermaid 图

其他：
- 智能场景仅保留"选题推荐"
- vite 代理配置增加 /pdf/ 和 /draw/ 路由

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/pptist-deploy/Dockerfile

@@ -0,0 +1,41 @@
+# PPTist 构建 & 部署
+FROM docker.1ms.run/node:20 AS builder
+ENV http_proxy=http://219.234.197.247:53128
+ENV https_proxy=http://219.234.197.247:53128
+ENV no_proxy=localhost,127.0.0.1,10.0.0.0/8,192.168.0.0/16,172.17.0.0/16
+WORKDIR /app
+COPY PPTist/package*.json ./
+RUN npm config set registry https://registry.npmmirror.com && npm install
+COPY PPTist/ .
+
+# 修改 SERVER_URL: 生产环境使用相对路径 /pptapi，由 nginx 反代到 AI 后端
+RUN sed -i "s|'https://server.pptist.cn'|'/pptapi'|g" src/services/index.ts
+
+# 修改模型选项为 deepseek-v3
+RUN sed -i "s/glm-4\.7-flash/deepseek-v3/g" src/views/Editor/AIPPTDialog.vue && \
+    sed -i "s/GLM-4\.7-Flash/DeepSeek-V3/g" src/views/Editor/AIPPTDialog.vue && \
+    sed -i "s/doubao-seed-1\.6-flash/deepseek-v3/g" src/views/Editor/AIPPTDialog.vue && \
+    sed -i "s/Doubao-Seed-1\.6-Flash/DeepSeek-V3/g" src/views/Editor/AIPPTDialog.vue && \
+    sed -i "s/GLM-4\.5-Flash/DeepSeek-V3/g" src/services/index.ts
+
+RUN npm run build
+
+# 生产阶段
+FROM docker.1ms.run/nginx:alpine
+COPY --from=builder /app/dist /usr/share/nginx/html
+RUN echo 'server { \
+    listen 80; \
+    root /usr/share/nginx/html; \
+    index index.html; \
+    location / { \
+        try_files $uri $uri/ /index.html; \
+    } \
+    location /pptapi/ { \
+        proxy_pass http://172.17.0.1:18086/; \
+        proxy_http_version 1.1; \
+        proxy_set_header Connection ""; \
+        proxy_buffering off; \
+        proxy_cache off; \
+    } \
+}' > /etc/nginx/conf.d/default.conf
+EXPOSE 80

scripts/pptist-deploy/deploy-all-tools.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+# 一键部署三个工具: TrWebOCR, LibreTranslate, PPTist + AI后端
+set -e
+
+echo "========== 1. 部署 TrWebOCR (端口 18083) =========="
+docker rm -f trwebocr 2>/dev/null || true
+docker run -d --name trwebocr --restart always -p 18083:8089 mmmz/trwebocr:latest
+echo "TrWebOCR 启动完成"
+
+echo "========== 2. 部署 LibreTranslate (端口 18084) =========="
+docker rm -f libretranslate 2>/dev/null || true
+docker run -d --name libretranslate --restart always \
+  -p 18084:5000 \
+  -e LT_LOAD_ONLY=en,zh \
+  -v lt-data:/home/libretranslate/.local \
+  libretranslate/libretranslate
+echo "LibreTranslate 启动完成（语言模型下载中，约5分钟后可用）"
+
+echo "========== 3. 启动 PPTist AI 后端 (端口 18086) =========="
+# 先安装依赖
+pip install fastapi uvicorn httpx 2>/dev/null || pip3 install fastapi uvicorn httpx
+# 杀掉旧进程
+pkill -f "pptist-ai-backend" 2>/dev/null || true
+sleep 1
+# 用 screen 启动后台运行
+screen -dmS pptist-ai python3 /root/gangyan/scripts/pptist-ai-backend.py
+echo "PPTist AI 后端启动完成"
+
+echo "========== 4. 构建并部署 PPTist (端口 18085) =========="
+cd /root/gangyan/scripts/pptist-deploy
+docker rm -f pptist 2>/dev/null || true
+docker build -t pptist:latest .
+docker run -d --name pptist --restart always -p 18085:80 pptist:latest
+echo "PPTist 启动完成"
+
+echo ""
+echo "========== 部署完成 =========="
+echo "TrWebOCR:       http://localhost:18083"
+echo "LibreTranslate: http://localhost:18084"
+echo "PPTist:         http://localhost:18085"
+echo "PPTist AI后端:  http://localhost:18086"