feat: implement user and forward max connection limit (#461)

* docs: add implementation plan for max conn limit

* feat: add CLimiters support for websocket reporter

* feat: add max_conn field to user and forward models

* feat: implement max conn limiter dispatching

* feat: add maxConn to user and forward CRUD API

* feat: add max conn UI to user management and forward rules

* fix: load MaxConn in get forward record and add e2e contract test for max conn limit

vite-frontend/src/pages/forward.tsx

@@ -157,6 +157,7 @@ interface ForwardForm {
   interfaceName?: string;
   strategy: string;
   speedId: number | null;
+  maxConn?: number;
 }
 
 interface ForwardUserGroup {
@@ -1306,6 +1307,7 @@ export default function ForwardPage() {
     interfaceName: "",
     strategy: "fifo",
     speedId: null,
+    maxConn: 0,
   });
   const [inIpTouched, setInIpTouched] = useState(false);
 
@@ -4723,6 +4725,20 @@ export default function ForwardPage() {
               </ModalHeader>
               <ModalBody>
                 <div className="space-y-4 pb-4">
+                  <Input
+                    label="最大连接数"
+                    placeholder="0 或空表示不限制"
+                    type="number"
+                    min="0"
+                    value={form.maxConn === 0 ? "" : String(form.maxConn || "")}
+                    onChange={(e) => {
+                      const value = Math.max(Number(e.target.value) || 0, 0);
+                      setForm((prev) => ({ ...prev, maxConn: value }));
+                    }}
+                    description="此设置优先于用户的全局连接数限制。0 表示不限制。"
+                    variant="bordered"
+                  />
+
                   <Input
                     errorMessage={errors.name}
                     isInvalid={!!errors.name}

vite-frontend/src/pages/user.tsx

@@ -219,6 +219,7 @@ export default function UserPage() {
     num: 10,
     expTime: null,
     flowResetTime: 0,
+    maxConn: 0,
   });
   const [userFormLoading, setUserFormLoading] = useState(false);
   const [quotaResetLoading, setQuotaResetLoading] = useState(false);
@@ -514,6 +515,7 @@ export default function UserPage() {
       num: 10,
       expTime: null,
       flowResetTime: 0,
+    maxConn: 0,
       groupIds: [],
     });
     onUserModalOpen();
@@ -1516,6 +1518,28 @@ export default function UserPage() {
                   setUserForm((prev) => ({ ...prev, flow: value }));
                 }}
               />
+              <Input
+                label="最大连接数"
+                placeholder="0 或空表示不限制"
+                type="number"
+                min="0"
+                value={userForm.maxConn === 0 ? "" : String(userForm.maxConn || "")}
+                onChange={(e) => {
+                  const value = Math.max(Number(e.target.value) || 0, 0);
+                  setUserForm((prev) => ({ ...prev, maxConn: value }));
+                }}
+              />
+              <Input
+                label="最大连接数"
+                placeholder="0 或空表示不限制"
+                type="number"
+                min="0"
+                value={userForm.maxConn === 0 ? "" : String(userForm.maxConn || "")}
+                onChange={(e) => {
+                  const value = Math.max(Number(e.target.value) || 0, 0);
+                  setUserForm((prev) => ({ ...prev, maxConn: value }));
+                }}
+              />
               <Input
                 isRequired
                 label="规则数量"
@@ -1926,6 +1950,7 @@ export default function UserPage() {
                     <TableColumn>规则数量</TableColumn>
                     <TableColumn>状态</TableColumn>
                     <TableColumn>限速规则</TableColumn>
+                    <TableColumn>最大连接</TableColumn>
                     <TableColumn>重置时间</TableColumn>
                     <TableColumn>到期时间</TableColumn>
                     <TableColumn>操作</TableColumn>