fix(server): avoid fixed test server ports

Use OS-assigned ports for server integration tests and publish the actual Bun server port after startup, preventing local port collisions from failing server checks.

Tested: bun test src/server/__tests__/e2e/business-flow.test.ts
Tested: bun test src/server/__tests__/e2e/full-flow.test.ts src/server/__tests__/conversations.test.ts src/server/__tests__/tasks.test.ts src/server/__tests__/haha-openai-oauth-api.test.ts
Tested: bun run check:server
Confidence: high
Scope-risk: narrow

src/server/__tests__/conversations.test.ts

@@ -966,11 +966,10 @@ describe('WebSocket Chat Integration', () => {
     )
     await fs.mkdir(path.join(tmpDir, 'projects'), { recursive: true })
 
-    const port = 15000 + Math.floor(Math.random() * 1000)
     const { startServer } = await import('../index.js')
-    server = startServer(port, '127.0.0.1')
-    baseUrl = `http://127.0.0.1:${port}`
-    wsUrl = `ws://127.0.0.1:${port}`
+    server = startServer(0, '127.0.0.1')
+    baseUrl = `http://127.0.0.1:${server.port}`
+    wsUrl = `ws://127.0.0.1:${server.port}`
   })
 
   afterAll(async () => {

src/server/__tests__/e2e/business-flow.test.ts

@@ -51,10 +51,9 @@ async function startTestServer() {
   await fs.mkdir(path.join(tmpDir, 'agents'), { recursive: true })
 
   const { startServer } = await import('../../index.js')
-  const port = 14000 + Math.floor(Math.random() * 1000)
-  server = startServer(port, '127.0.0.1')
-  baseUrl = `http://127.0.0.1:${port}`
-  wsUrl = `ws://127.0.0.1:${port}`
+  server = startServer(0, '127.0.0.1')
+  baseUrl = `http://127.0.0.1:${server.port}`
+  wsUrl = `ws://127.0.0.1:${server.port}`
 }
 
 async function api(method: string, urlPath: string, body?: unknown) {

src/server/__tests__/e2e/full-flow.test.ts

@@ -51,9 +51,8 @@ async function startTestServer() {
   await fs.mkdir(path.join(tmpDir, 'projects'), { recursive: true })
 
   const { startServer } = await import('../../index.js')
-  const port = 13456 + Math.floor(Math.random() * 1000)
-  server = startServer(port, '127.0.0.1')
-  baseUrl = `http://127.0.0.1:${port}`
+  server = startServer(0, '127.0.0.1')
+  baseUrl = `http://127.0.0.1:${server.port}`
 }
 
 async function api(method: string, path: string, body?: unknown): Promise<{ status: number; data: any }> {

src/server/__tests__/haha-openai-oauth-api.test.ts

@@ -191,11 +191,10 @@ describe('GET /auth/callback', () => {
   afterEach(teardown)
 
   test('routes the OpenAI Codex redirect path to the desktop callback page', async () => {
-    const port = await getFreePort()
     const originalServerPort = ProviderService.getServerPort()
-    const server = startServer(port, '127.0.0.1')
+    const server = startServer(0, '127.0.0.1')
     try {
-      const res = await fetch(`http://127.0.0.1:${port}/auth/callback`)
+      const res = await fetch(`http://127.0.0.1:${server.port}/auth/callback`)
       expect(res.status).toBe(200)
       const html = await res.text()
       expect(html).toContain('OpenAI Login Failed')

src/server/__tests__/tasks.test.ts

@@ -129,10 +129,9 @@ describe('Tasks API', () => {
     process.env.CLAUDE_CONFIG_DIR = tmpDir
     await fs.mkdir(path.join(tmpDir, 'projects'), { recursive: true })
 
-    const port = 15500 + Math.floor(Math.random() * 500)
     const { startServer } = await import('../../server/index.js')
-    server = startServer(port, '127.0.0.1')
-    baseUrl = `http://127.0.0.1:${port}`
+    server = startServer(0, '127.0.0.1')
+    baseUrl = `http://127.0.0.1:${server.port}`
   })
 
   afterEach(async () => {

src/server/index.ts

@@ -127,7 +127,7 @@ export function startServer(port = PORT, host = HOST) {
   enableConfigs()
   diagnosticsService.installConsoleCapture()
   diagnosticsService.installProcessCapture()
-  ProviderService.setServerPort(port)
+  let serverPort = port
   const localConnectHost =
     host === '0.0.0.0' || host === '127.0.0.1' || host === 'localhost'
       ? '127.0.0.1'
@@ -225,7 +225,7 @@ export function startServer(port = PORT, host = HOST) {
               connectedAt: Date.now(),
               channel: 'client',
               sdkToken: null,
-              serverPort: port,
+              serverPort,
               serverHost: localConnectHost,
             },
           })
@@ -260,7 +260,7 @@ export function startServer(port = PORT, host = HOST) {
               connectedAt: Date.now(),
               channel: 'sdk',
               sdkToken: url.searchParams.get('token'),
-              serverPort: port,
+              serverPort,
               serverHost: localConnectHost,
             },
           })
@@ -428,6 +428,8 @@ export function startServer(port = PORT, host = HOST) {
 
       websocket: handleWebSocket,
     })
+    serverPort = server.port
+    ProviderService.setServerPort(serverPort)
   } catch (error) {
     const message = error instanceof Error && error.message
       ? error.message
@@ -448,7 +450,7 @@ export function startServer(port = PORT, host = HOST) {
     )
   })
 
-  console.log(`[Server] Claude Code API server running at http://${host}:${port}`)
+  console.log(`[Server] Claude Code API server running at http://${host}:${serverPort}`)
   return server
 }