Add optional environment variables field to Add MCP server dialog

- Add env textarea parsing KEY=VALUE lines in AddMcpDialog
- Include env map in POST /mcp/servers body
- Add i18n keys (fieldEnv, fieldEnvPlaceholder, envParseError) in all 5 locales
- Show environment example in McpDocs YAML
- Backend already supports Env field on MCPServer

Author: elliottophellia

web/src/lib/i18n.tsx

@@ -203,6 +203,9 @@ const en = {
   'mcp.fieldTransport': 'Transport',
   'mcp.fieldCommand': 'Command',
   'mcp.fieldArgs': 'Arguments',
+  'mcp.fieldEnv': 'Environment (Optional)',
+  'mcp.fieldEnvPlaceholder': 'KEY=VALUE per line',
+  'mcp.envParseError': 'Environment entries must be KEY=VALUE, one per line.',
   'mcp.fieldUrl': 'URL',
   'plugins.add': 'Add plugin',
   'plugins.addTitle': 'Add a plugin',
@@ -1218,6 +1221,9 @@ const id: Dict = {
   'mcp.fieldTransport': 'Transport',
   'mcp.fieldCommand': 'Perintah',
   'mcp.fieldArgs': 'Argumen',
+  'mcp.fieldEnv': 'Lingkungan (Opsional)',
+  'mcp.fieldEnvPlaceholder': 'KEY=VALUE per baris',
+  'mcp.envParseError': 'Entri lingkungan harus berupa KEY=VALUE, satu per baris.',
   'mcp.fieldUrl': 'URL',
   'plugins.add': 'Tambah plugin',
   'plugins.addTitle': 'Tambah plugin',
@@ -2100,6 +2106,9 @@ const ja: Dict = {
   'mcp.fieldTransport': 'トランスポート',
   'mcp.fieldCommand': 'コマンド',
   'mcp.fieldArgs': '引数',
+  'mcp.fieldEnv': '環境変数 (オプション)',
+  'mcp.fieldEnvPlaceholder': 'KEY=VALUE を行ごとに',
+  'mcp.envParseError': '環境変数は KEY=VALUE の形式で各行に1つずつ指定してください。',
   'mcp.fieldUrl': 'URL',
   'plugins.add': 'プラグインを追加',
   'plugins.addTitle': 'プラグインを追加',
@@ -2802,6 +2811,9 @@ const zh: Dict = {
   'mcp.fieldTransport': '传输方式',
   'mcp.fieldCommand': '命令',
   'mcp.fieldArgs': '参数',
+  'mcp.fieldEnv': '环境变量 (可选)',
+  'mcp.fieldEnvPlaceholder': '每行一个 KEY=VALUE',
+  'mcp.envParseError': '环境变量必须为 KEY=VALUE 格式，每行一个。',
   'mcp.fieldUrl': 'URL',
   'plugins.add': '添加插件',
   'plugins.addTitle': '添加插件',
@@ -3502,6 +3514,9 @@ const ru: Dict = {
   'mcp.fieldTransport': 'Транспорт',
   'mcp.fieldCommand': 'Команда',
   'mcp.fieldArgs': 'Аргументы',
+  'mcp.fieldEnv': 'Переменные среды (опционально)',
+  'mcp.fieldEnvPlaceholder': 'KEY=VALUE в каждой строке',
+  'mcp.envParseError': 'Переменные среды должны быть в формате KEY=VALUE, по одной на строку.',
   'mcp.fieldUrl': 'URL',
   'plugins.add': 'Добавить плагин',
   'plugins.addTitle': 'Добавить плагин',

web/src/pages/McpPage.tsx

@@ -28,6 +28,7 @@ import {
   Tabs,
   TabsList,
   TabsTrigger,
+  Textarea,
 } from '@/components/ui/primitives'
 import {
   Dialog,
@@ -267,12 +268,14 @@ function McpDocs() {
       transport: stdio
       command: npx
       args: ["-y", "@modelcontextprotocol/server-filesystem", "/home/you/data"]
+      # env:                              # optional
+      #   MY_VAR: "value"
     remote:
       enabled: true
       transport: http
       url: https://example.com/mcp
       headers:
-        Authorization: "Bearer …"`}
+        Authorization: "Bearer ..."`}
         </pre>
         <p className="mt-3 text-xs text-muted-foreground">{t('mcp.docsHint')}</p>
       </CardContent>
@@ -295,6 +298,7 @@ function AddMcpDialog({
   const [command, setCommand] = useState('')
   const [args, setArgs] = useState('')
   const [url, setUrl] = useState('')
+  const [envText, setEnvText] = useState('')
   const [busy, setBusy] = useState(false)
   const [error, setError] = useState<string>()
 
@@ -304,22 +308,35 @@ function AddMcpDialog({
     setCommand('')
     setArgs('')
     setUrl('')
+    setEnvText('')
     setError(undefined)
   }
 
   const submit = async () => {
     setBusy(true)
     setError(undefined)
     try {
+      const env: Record<string, string> = {}
+      for (const line of envText.split('\n')) {
+        const trimmed = line.trim()
+        if (!trimmed) continue
+        const eq = trimmed.indexOf('=')
+        if (eq <= 0) {
+          setError(t('mcp.envParseError'))
+          return
+        }
+        env[trimmed.slice(0, eq)] = trimmed.slice(eq + 1)
+      }
       const body =
         transport === 'stdio'
           ? {
               name,
               transport,
               command,
               args: args.split(/\s+/).filter(Boolean),
+              env,
             }
-          : { name, transport, url }
+          : { name, transport, url, env }
       const r = await post<{ ok: boolean; error?: string }>('/mcp/servers', body)
       if (!r.ok) {
         setError(r.error ?? t('mcp.addFailed'))
@@ -418,6 +435,18 @@ function AddMcpDialog({
           )}
 
           {error ? <p className="text-xs text-destructive">{error}</p> : null}
+
+          <div className="grid gap-1.5">
+            <Label htmlFor="mcp-env">{t('mcp.fieldEnv')}</Label>
+            <Textarea
+              id="mcp-env"
+              value={envText}
+              onChange={(e) => setEnvText(e.target.value)}
+              placeholder={t('mcp.fieldEnvPlaceholder')}
+              className="min-h-[60px] resize-y font-mono text-xs"
+              rows={3}
+            />
+          </div>
         </DialogBody>
         <DialogFooter>
           <DialogClose asChild>