fix(mobile): route phone APIs to selected profile and unblock runtime readiness

apps/desktop/electron/first-run-setup-gate.ts

@@ -1,3 +1,5 @@
+import path from 'node:path'
+
 interface FirstRunSetupBackend {
   activeRoot?: string
   kind?: string
@@ -5,6 +7,7 @@ interface FirstRunSetupBackend {
 }
 
 interface FirstRunSetupGateOptions {
+  isRuntimeAvailable?: (backend: FirstRunSetupBackend) => boolean
   hideChoice?: () => void
   log?: (message: string) => void
   onStuck?: (backend: FirstRunSetupBackend, stuckAfterMs: number) => void
@@ -12,9 +15,10 @@ interface FirstRunSetupGateOptions {
   stuckAfterMs?: number
 }
 
-export type FirstRunSetupDecision = 'continue-local' | 'remote-applied' | 'reset'
+export type FirstRunSetupDecision = 'continue-local' | 'remote-applied' | 'reset' | 'runtime-ready'
 
 export function createFirstRunSetupGate({
+  isRuntimeAvailable,
   hideChoice,
   log,
   onStuck,
@@ -24,6 +28,7 @@ export function createFirstRunSetupGate({
   let localBootstrapConfirmed = false
 
   let waiter: {
+    activeRoot?: string
     promise: Promise<FirstRunSetupDecision>
     resolve: (decision: FirstRunSetupDecision) => void
   } | null = null
@@ -65,6 +70,13 @@ export function createFirstRunSetupGate({
       return 'continue-local' as const
     }
 
+    // Recheck synchronously before registering the waiter: another profile
+    // may have completed installation before this stale descriptor arrived.
+    if (backend && isRuntimeAvailable?.(backend)) {
+      if (backend.activeRoot) runtimeAvailable(backend.activeRoot)
+      return 'runtime-ready' as const
+    }
+
     if (waiter) {
       return waiter.promise
     }
@@ -78,7 +90,7 @@ export function createFirstRunSetupGate({
       resolveWaiter = resolve
     })
 
-    waiter = { promise, resolve: resolveWaiter }
+    waiter = { activeRoot: backend?.activeRoot, promise, resolve: resolveWaiter }
 
     return promise
   }
@@ -102,6 +114,21 @@ export function createFirstRunSetupGate({
     settleWaiter('continue-local')
   }
 
+  // A sibling profile may finish installing the SAME shared runtime while the
+  // primary boot is awaiting a setup choice. Re-resolve it; do not interpret
+  // this as permission for another installation, or reuse the sibling's
+  // profile/backend descriptor.
+  const runtimeAvailable = (root: string) => {
+    const canonical = (value: string) => {
+      const absolute = path.resolve(value)
+      return process.platform === 'win32' ? absolute.toLowerCase() : absolute
+    }
+    if (!waiter?.activeRoot || canonical(waiter.activeRoot) !== canonical(root)) return false
+    settleWaiter('runtime-ready')
+    hideChoice?.()
+    return true
+  }
+
   const resetForRetry = () => {
     // Reset paths are followed by a renderer reload / fresh startHermes() call.
     // Settle the old boot explicitly so it cannot fall through into local
@@ -140,6 +167,7 @@ export function createFirstRunSetupGate({
     isLocalBootstrapConfirmed,
     resetForRepair,
     resetForRetry,
+    runtimeAvailable,
     shouldGate,
     wait
   }