feat: harden Flow cold-start/force-quit and polish macOS dictation UX

Fix cold-start overlay recursion that overflowed the main-thread stack when
recording began while the ready overlay was still up; also remove temporary
on-screen Flow DEBUG panels after the orange-mic investigation, and land the
macOS overlay/catalog/layout polish plus related Flow recovery hardening.

OSGKeyboardShared/Services/CloudASR/CloudASRService.swift

@@ -133,7 +133,7 @@ public final class CloudASRService: ASRService, @unchecked Sendable {
     }
 
     private func bindClientIfNeeded() {
-        let providerId = store.providerId
+        let providerId = store.asrProviderId
         let strategy = CloudASRModelCatalog.strategy(for: providerId)
         lock.withLock {
             guard boundProviderId != providerId else { return }