Route usage tracking to z.ai API when enabled

When z.ai is enabled in config, the Claude usage endpoint now:
- Uses z.ai API key instead of OAuth token
- Fetches from https://api.z.ai/api/anthropic/api/oauth/usage
- Falls back to Anthropic's API when z.ai is disabled

Author: knowsuchagency

server/routes/monitoring.ts

@@ -7,6 +7,7 @@ import { db, tasks } from '../db'
 import { getPTYManager } from '../terminal/pty-instance'
 import { getDtachService } from '../terminal/dtach-service'
 import { getMetrics, getCurrentMetrics } from '../services/metrics-collector'
+import { getZAiSettings } from '../lib/settings'
 
 interface ClaudeInstance {
   pid: number
@@ -821,16 +822,21 @@ async function getClaudeOAuthToken(): Promise<string | null> {
   return null
 }
 
-// Fetch usage from Anthropic API
-async function fetchClaudeUsage(token: string): Promise<ClaudeUsageResponse> {
+// Fetch usage from Anthropic or z.ai API
+async function fetchClaudeUsage(token: string, baseURL?: string): Promise<ClaudeUsageResponse> {
   try {
-    const response = await fetch('https://api.anthropic.com/api/oauth/usage', {
+    // Use z.ai API if baseURL is provided, otherwise use Anthropic
+    const apiUrl = baseURL
+      ? `${baseURL}/api/oauth/usage`
+      : 'https://api.anthropic.com/api/oauth/usage'
+
+    const response = await fetch(apiUrl, {
       method: 'GET',
       headers: {
         'Content-Type': 'application/json',
         'User-Agent': 'vibora/1.0.0',
         Authorization: `Bearer ${token}`,
-        'anthropic-beta': 'oauth-2025-04-20',
+        ...(baseURL ? {} : { 'anthropic-beta': 'oauth-2025-04-20' }),
       },
     })
 
@@ -907,27 +913,36 @@ async function fetchClaudeUsage(token: string): Promise<ClaudeUsageResponse> {
 monitoringRoutes.get('/claude-usage', async (c) => {
   const now = Date.now()
 
-  // Return cached data if still fresh
-  if (cachedUsage && (now - usageCacheTimestamp) < USAGE_CACHE_MS) {
-    return c.json(cachedUsage)
+  // Check if z.ai is enabled
+  const zaiSettings = getZAiSettings()
+
+  // Get token: z.ai API key if enabled, otherwise OAuth token
+  let token: string | null = null
+  let baseURL: string | undefined
+
+  if (zaiSettings.enabled && zaiSettings.apiKey) {
+    token = zaiSettings.apiKey
+    baseURL = 'https://api.z.ai/api/anthropic'
+  } else {
+    token = await getClaudeOAuthToken()
   }
 
-  // Get OAuth token
-  const token = await getClaudeOAuthToken()
   if (!token) {
     const response: ClaudeUsageResponse = {
       available: false,
       fiveHour: null,
       sevenDay: null,
       sevenDayOpus: null,
       sevenDaySonnet: null,
-      error: 'No Claude Code OAuth token found',
+      error: zaiSettings.enabled
+        ? 'z.ai is enabled but no API key is configured'
+        : 'No Claude Code OAuth token found',
     }
     return c.json(response)
   }
 
   // Fetch usage from API
-  const usage = await fetchClaudeUsage(token)
+  const usage = await fetchClaudeUsage(token, baseURL)
 
   // Cache the result
   cachedUsage = usage