Consolidate perfTiming state into a single perf object

Removes the separate variable and setter in favor of a plain object,
making the mutable state easier to track and eliminating a needless
abstraction.

src/server/api/system.ts

@@ -1,5 +1,5 @@
 import { allApps, APPS_DIR, onChange } from '$apps'
-import { perfTiming, setPerfTiming } from '../proxy'
+import { perf } from '../proxy'
 import { onHostLog } from '../tui'
 import { Hype } from '@because/hype'
 import { cpus, freemem, platform, totalmem } from 'os'
@@ -278,22 +278,22 @@ function pushHostLog(text: string) {
   for (const listener of unifiedLogListeners) listener(line)
 }
 
+// Perf timing toggle
+router.get('/perf', c => c.json({ perfTiming: perf.timing }))
+router.post('/perf', async c => {
+  const body = await c.req.json<{ on?: boolean }>().catch(() => ({}))
+  const on = body.on ?? !perf.timing
+  perf.timing = on
+  console.log(`[perf] timing ${on ? 'enabled' : 'disabled'}`)
+  return c.json({ perfTiming: on })
+})
+
 // Subscribe to app changes to collect logs
 onChange(collectLogs)
 
 // Subscribe to host-level log messages
 onHostLog(pushHostLog)
 
-// Perf timing toggle
-router.get('/perf', c => c.json({ perfTiming }))
-router.post('/perf', async c => {
-  const body = await c.req.json<{ on?: boolean }>().catch(() => ({}))
-  const on = body.on ?? !perfTiming
-  setPerfTiming(on)
-  console.log(`[perf] timing ${on ? 'enabled' : 'disabled'}`)
-  return c.json({ perfTiming: on })
-})
-
 // Restart server (systemd brings it back)
 router.post('/restart', c => {
   setTimeout(() => process.exit(0), 100)

src/server/proxy.ts

@@ -3,9 +3,7 @@ import { getAppBySubdomain } from '$apps'
 
 export type { WsData }
 
-export let perfTiming = false
+export const perf = { timing: false }
-
-export const setPerfTiming = (on: boolean) => { perfTiming = on }
 
 const pendingMessages = new Map<ServerWebSocket<WsData>, (string | ArrayBuffer | Uint8Array)[]>()
 const upstreams = new Map<ServerWebSocket<WsData>, WebSocket>()
@@ -64,7 +62,7 @@ export async function proxySubdomain(subdomain: string, req: Request): Promise<R
       body,
       redirect: 'manual',
     })
-    if (perfTiming) {
+    if (perf.timing) {
       const ms = (performance.now() - start).toFixed(1)
       console.log(`[perf] ${req.method} ${subdomain}${url.pathname} → ${res.status} in ${ms}ms`)
     }