fix(api): 限制上传文件大小为8MB

- 后端新增中间件限制请求体最大为8MB，超出返回413错误
- nginx配置添加client_max_body_size为8m以支持8MB最大上传
- 更新favicon.svg图标样式
- 模型列表页默认分页大小由10改为50，提高一次加载条目数

backend/main.py

@@ -1,5 +1,6 @@
-from fastapi import FastAPI, Depends
+from fastapi import FastAPI, Depends, Request
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import JSONResponse
 import os
 import logging
 from dotenv import load_dotenv
@@ -39,6 +40,22 @@ app = FastAPI(
     version="1.0.0"
 )
 
+# 限制请求体最大 8MB
+MAX_BODY_SIZE = 8 * 1024 * 1024  # 8MB
+
+
+@app.middleware("http")
+async def limit_body_size(request: Request, call_next):
+    content_length = request.headers.get("content-length")
+    if content_length and int(content_length) > MAX_BODY_SIZE:
+        return JSONResponse(
+            status_code=413,
+            content={"detail": "上传文件大小超过 8MB 限制"},
+        )
+    response = await call_next(request)
+    return response
+
+
 # Configure CORS
 app.add_middleware(
     CORSMiddleware,

frontend/nginx.conf

@@ -15,6 +15,9 @@ server {
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $scheme;
+
+        # 允许上传最大 8MB 的文件
+        client_max_body_size 8m;
     }
 
     # Handle Vue Router history mode

frontend/public/favicon.svg

@@ -1,3 +1,6 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
+<svg xmlns="http://www.w3.org/2000/svg" width="1em" height="1em" viewBox="0 0 36 36">
-  <text y="0.88em" x="50" text-anchor="middle" font-size="72"><§</text>
+	<path d="M0 0h36v36H0z" fill="none" />
+	<path fill="#66757f" d="M18 0C9.716 0 3 6.716 3 15v9h3v-9C6 8 11.269 2.812 18 2.812S30 8 30 15v10l3-1v-9c0-8.284-6.716-15-15-15" />
+	<path fill="#31373d" d="M6 27a2 2 0 0 1-2 2H2a2 2 0 0 1-2-2v-9a2 2 0 0 1 2-2h2a2 2 0 0 1 2 2zm30 0a2 2 0 0 1-2 2h-2a2 2 0 0 1-2-2v-9a2 2 0 0 1 2-2h2a2 2 0 0 1 2 2z" />
+	<path fill="#55acee" d="m19.182 10.016l-6.364 1.313c-.45.093-.818.544-.818 1.004v16.185a6.2 6.2 0 0 0-2.087-.36c-2.785 0-5.042 1.755-5.042 3.922c0 2.165 2.258 3.827 5.042 3.827C12.649 35.905 14.922 34 15 32V16.39l4.204-.872c.449-.093.796-.545.796-1.004v-3.832c0-.458-.368-.759-.818-.666m8 3.151l-4.297.865c-.45.093-.885.544-.885 1.003V26.44c0-.152-.878-.24-1.4-.24c-2.024 0-3.633 1.276-3.633 2.852c0 1.574 1.658 2.851 3.683 2.851s3.677-1.277 3.677-2.851l-.014-11.286l2.869-.598c.45-.093.818-.544.818-1.003v-2.33c0-.459-.368-.76-.818-.668" />
 </svg>

frontend/src/views/model/index.vue

@@ -343,7 +343,7 @@ const searchForm = reactive({
 
 const pagination = reactive({
   page: 1,
-  pageSize: 10,
+  pageSize: 50,
   total: 0
 })