Merge branch 'fix/account-filters-menu-missing-features'

## Summary
- 修复账号管理页面组件拆分时遗漏的功能
- 统一所有内联 SVG 为 Icon 组件
- 修复 ProxySelector 选择"无代理"时发送错误值的问题

## Changes
- AccountTableFilters: 添加 Antigravity 平台选项、类型筛选器、inactive 状态
- AccountActionMenu: 恢复重置状态和清除限速按钮
- AccountsView: 修正 handleClearRateLimit 调用正确的 API
- ProxySelector: 修复选择"无代理"时发送 null 而不是 0

## Conflict Resolution
- ProxySelector.vue: 采用 PR 分支的正确逻辑（发送 null 而不是 0）
  这是正确的修复，因为后端使用 *int64 类型，nil 会触发 ClearProxyID()

frontend/src/i18n/locales/en.ts

@@ -462,7 +462,8 @@ export default {
     days: ' days',
     codeRedeemSuccess: 'Code redeemed successfully!',
     failedToRedeem: 'Failed to redeem code. Please check the code and try again.',
-    subscriptionRefreshFailed: 'Redeemed successfully, but failed to refresh subscription status.'
+    subscriptionRefreshFailed: 'Redeemed successfully, but failed to refresh subscription status.',
+    pleaseEnterCode: 'Please enter a redeem code'
   },
 
   // Profile
@@ -658,6 +659,10 @@ export default {
       failedToDelete: 'Failed to delete user',
       failedToToggle: 'Failed to update user status',
       failedToLoadApiKeys: 'Failed to load user API keys',
+      emailRequired: 'Please enter email',
+      concurrencyMin: 'Concurrency must be at least 1',
+      amountRequired: 'Please enter a valid amount',
+      insufficientBalance: 'Insufficient balance',
       deleteConfirm: "Are you sure you want to delete '{email}'? This action cannot be undone.",
       setAllowedGroups: 'Set Allowed Groups',
       allowedGroupsHint:
@@ -689,7 +694,6 @@ export default {
       failedToDeposit: 'Failed to deposit',
       failedToWithdraw: 'Failed to withdraw',
       useDepositWithdrawButtons: 'Please use deposit/withdraw buttons to adjust balance',
-      insufficientBalance: 'Insufficient balance, balance cannot be negative after withdrawal',
       roles: {
         admin: 'Admin',
         user: 'User'
@@ -749,6 +753,9 @@ export default {
         failedToLoad: 'Failed to load attributes',
         failedToCreate: 'Failed to create attribute',
         failedToUpdate: 'Failed to update attribute',
+        keyRequired: 'Please enter attribute key',
+        nameRequired: 'Please enter display name',
+        optionsRequired: 'Please add at least one option',
         failedToDelete: 'Failed to delete attribute',
         failedToReorder: 'Failed to update order',
         keyExists: 'Attribute key already exists',
@@ -816,6 +823,7 @@ export default {
       failedToCreate: 'Failed to create group',
       failedToUpdate: 'Failed to update group',
       failedToDelete: 'Failed to delete group',
+      nameRequired: 'Please enter group name',
       platforms: {
         all: 'All Platforms',
         anthropic: 'Anthropic',
@@ -904,6 +912,9 @@ export default {
       failedToAssign: 'Failed to assign subscription',
       failedToExtend: 'Failed to extend subscription',
       failedToRevoke: 'Failed to revoke subscription',
+      pleaseSelectUser: 'Please select a user',
+      pleaseSelectGroup: 'Please select a group',
+      validityDaysRequired: 'Please enter a valid number of days (at least 1)',
       revokeConfirm:
         "Are you sure you want to revoke the subscription for '{user}'? This action cannot be undone."
     },
@@ -1587,6 +1598,9 @@ export default {
       failedToUpdate: 'Failed to update proxy',
       failedToDelete: 'Failed to delete proxy',
       failedToTest: 'Failed to test proxy',
+      nameRequired: 'Please enter proxy name',
+      hostRequired: 'Please enter host address',
+      portInvalid: 'Port must be between 1-65535',
       deleteConfirm:
         "Are you sure you want to delete '{name}'? Accounts using this proxy will have their proxy removed."
     },
@@ -1644,6 +1658,11 @@ export default {
       failedToDelete: 'Failed to delete code',
       failedToDeleteUnused: 'Failed to delete unused codes',
       failedToCopy: 'Failed to copy codes',
+      types: {
+        balance: 'Balance',
+        concurrency: 'Concurrency',
+        subscription: 'Subscription'
+      },
       selectGroup: 'Select Group',
       selectGroupPlaceholder: 'Choose a subscription group',
       validityDays: 'Validity Days',