refactor: extract inline middleware from index.ts into separate modules (#85)

- Extract update middleware to routes/update.ts
- Extract health middleware and version logic to routes/health.ts
- Extract shutdown logic to services/shutdown.ts
- Extract gateway init to services/gateway-bootstrap.ts
- Remove unused variables, fix duplicate app creation
- Bump version to 0.4.0

index.ts: 260 lines → 80 lines

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/server/src/routes/update.ts

@@ -0,0 +1,33 @@
+import Router from '@koa/router'
+
+export const updateRoutes = new Router()
+
+updateRoutes.post('/api/hermes/update', async (ctx) => {
+  const isWin = process.platform === 'win32'
+  const cmd = isWin
+    ? 'cmd /c npm install -g hermes-web-ui@latest'
+    : 'npm install -g hermes-web-ui@latest'
+
+  try {
+    const { execSync } = await import('child_process')
+    const output = execSync(cmd, {
+      encoding: 'utf-8',
+      timeout: 120000,
+      stdio: ['pipe', 'pipe', 'pipe'],
+    })
+    ctx.body = { success: true, message: output.trim() }
+
+    setTimeout(() => {
+      const { spawn } = require('child_process')
+      spawn(isWin ? 'cmd' : 'sh', isWin ? ['/c', 'hermes-web-ui restart'] : ['-c', 'hermes-web-ui restart'], {
+        detached: true,
+        stdio: 'ignore',
+        windowsHide: true,
+      }).unref()
+      process.exit(0)
+    }, 2000)
+  } catch (err: any) {
+    ctx.status = 500
+    ctx.body = { success: false, message: err.stderr || err.message }
+  }
+})