fix: add i18n for Users subtab, show login link on user creation

- Added 'settings.users' i18n key for English and Chinese
- Token banner now shows a full login link (domain/?token=xxx)
  with a Copy Link button, plus the raw token below
- Login link works automatically via existing ?token= auto-auth

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

src/channels/web/static/app.js

@@ -4415,12 +4415,14 @@ function createTokenForUser(userId, displayName) {
 function showTokenBanner(tokenValue) {
   var banner = document.getElementById('users-token-result');
   if (!banner) return;
+  var loginUrl = window.location.origin + '/?token=' + encodeURIComponent(tokenValue);
   banner.style.display = 'block';
-  banner.innerHTML = '<strong>Token created!</strong> Copy this now — it won\'t be shown again:<br>'
-    + '<code class="token-display" id="token-copy-value">' + escapeHtml(tokenValue) + '</code>'
-    + '<button class="btn-small" id="token-copy-btn">Copy</button>';
-  document.getElementById('token-copy-btn').addEventListener('click', function() {
-    navigator.clipboard.writeText(tokenValue);
+  banner.innerHTML = '<strong>User created!</strong> Share this login link — it won\'t be shown again:<br>'
+    + '<code class="token-display" id="token-copy-value">' + escapeHtml(loginUrl) + '</code>'
+    + '<button class="btn-small" id="token-copy-link">Copy Link</button>'
+    + '<br><span style="font-size:0.8em;color:var(--text-muted)">Raw token: ' + escapeHtml(tokenValue) + '</span>';
+  document.getElementById('token-copy-link').addEventListener('click', function() {
+    navigator.clipboard.writeText(loginUrl);
     this.textContent = 'Copied!';
   });
 }

src/channels/web/static/i18n/en.js

@@ -44,7 +44,8 @@ I18n.register('en', {
   'settings.channels': 'Channels',
   'settings.networking': 'Networking',
   'settings.mcp': 'MCP',
-  
+  'settings.users': 'Users',
+
   // Status
   'status.connected': 'Connected',
   'status.disconnected': 'Disconnected',

src/channels/web/static/i18n/zh-CN.js

@@ -44,7 +44,8 @@ I18n.register('zh-CN', {
   'settings.channels': '频道',
   'settings.networking': '网络',
   'settings.mcp': 'MCP',
-  
+  'settings.users': '用户管理',
+
   // 状态
   'status.connected': '已连接',
   'status.disconnected': '已断开',